EX-99.1 2 ea179488ex99-1_bancosant.htm INTERIM CONSOLIDATED FINANCIAL STATEMENTS FOR THE PERIODS ENDING ON MARCH 31, 2023, AND 2022, AND DECEMBER 31, 2022

Exhibit 99.1

C ons oli d ate d Fi n anc i al State me n ts Marc h 202 3 / B an c o San tan d e r C h ile 1 INTERIM CONSOLIDATED FINANCIAL STATEMENTS For the periods ending on March 31, 2023, and 2022, and December 31, 2022

CONSOLIDATED FINANCIAL STATEMENTS CONSOLIDATED STATEMENTS OF FINANCIAL POSITION ............................................................................................................................. ... .............................................. 3 CONSOLIDATED STATEMENTS OF INCOME ............................................................................................................................. ... ..................................................................... 5 CONSOLIDATED STATEMENTS OF OTHER COMPREHENSIVE INCOME ............................................................................................................................. ... ....................... 7 CONSOLIDATED STATEMENTS OF CASH FLOWS ............................................................................................................................. ... ............................................................ 8 CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY ............................................................................................................................. ... .............................................. 11 NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS NOTE 01 BACKGROUND OF THE INSTITUTION ............................................................................................................................. ... .............................................................. 12 NOTE 02 BREAKDOWN OF SIGNIFICANT ACCOUNTING CRITERIA..................................................................................................................... ... ...................................... 12 NOTE 03 NEW ACCOUNTING PRONOUNCEMENTS ISSUED AND ADOPTED OR ISSUED AND NOT YET ADOPTED ........................................................................... 46 NOTE 04 ACCOUNTING CHANGES...................................................................................................................... ... ........................................................................................... 48 NOTE 05 SIGNIFICANT EVENTS....................................................................................................................... ... ................................................................................................ 49 NOTE 06 BUSINESS SEGMENT...................................................................................................................... ... .................................................................................................. 50 NOTE 07 CASH AND CASH EQUIVALENTS ............................................................................................................................. ... ....................................................................... 53 NOTE 08 FINANCIAL ASSETS HELD FOR TRADING WITH CHANGES IN PROFIT AND LOSS ..................................................................................................................... 54 NOTE 09 NON - MARKETABLE FINANCIAL ASSETS MANDATORILY MEASURED AT FAIR VALUE THROUGH PROFIT OR LOSS IN RESULTS ............................................................................................................................. ... ........................................................................................................................... 57 NOTE 10 FINANCIAL ASSETS AND LIABILITIES DESIGNATED AT FAIR VALUE THROUGH PROFIT OR LOSS ........................................................................................ 58 NOTE 11 FINANCIAL ASSETS AT FAIR VALUE THROUGH OTHER COMPREHENSIVE INCOME ................................................................................................................ 59 NOTE 12 FINANCIAL DERIVATIVE CONTRACTS FOR HEDGING ACCOUNTING PURPOSES ..................................................................................................................... 64 NOTE 13 FINANCIAL ASSETS AT AMORTISED COST ............................................................................................................................. ... ....................................................... 74 NOTE 14 INVESTMENTS IN ASSOCIATES AND OTHER COMPANIES ............................................................................................................................. ... ............................ 98 NOTE 15 INTANGIBLE ASSETS ............................................................................................................................. ... .......................................................................................... 100 NOTE 16 FIXED ASSETS ............................................................................................................................. ... ...................................................................................................... 102 NOTE 17 RIGHT OF USE ASSETS AND OBLIGATION FOR LEASE CONTRACTS ............................................................................................................................. ... .......... 104 NOTE 18 CURRENT AND DEFERRED TAXES ............................................................................................................................. ... .................................................................... 107 NOTE 19 OTHER ASSETS ............................................................................................................................. ... .................................................................................................... 113 NOTE 20 NON - CURRENT ASSETS AND DISPOSAL GROUPS HELD FOR SALE AND LIABILITIES INCLUDED IN DISPOSAL GROUPS HELD FOR SALE ............................................................................................................................. ... ............................................................................................................................. . 114 NOTE 21 FINANCIAL LIABILITIES HELD FOR TRADING AT FAIR VALUE THROUGH PROFIT OR LOSS ................................................................................................... 115 NOTE 22 FINANCIAL LIABILITIES AT AMORTISED COST ............................................................................................................................. ... ............................................... 117 NOTE 23 ISSUED REGULATORY CAPITAL INSTRUMENTS ............................................................................................................................. ... ............................................ 128 NOTE 24 PROVISIONS FOR CONTINGENCIES ............................................................................................................................. ... ................................................................ 130 NOTE 25 PROVISIONS FOR DIVIDEND, INTEREST PAYMENT AND REVALUATION OF REGULATORY EQUITY FINANCIAL INSTRUMENTS ISSUED....................................................................................................................... ... ............................................................................................................. 131 NOTE 26 SPECIAL PROVISIONS FOR CREDIT RISK ............................................................................................................................. .. .......................................................... 132 NOTE 27 OTHER LIABILITIES ............................................................................................................................. ... ............................................................................................. 134 NOTE 28 EQUITY ............................................................................................................................. ... ................................................................................................................. 135 NOTE 29 CONTINGENCIES AND COMMITMENTS ............................................................................................................................. ... ......................................................... 140 NOTE 30 INTEREST INCOME AND EXPENSE ............................................................................................................................. ... .................................................................. 144 NOTE 31 READJUSTMENT INCOME AND EXPENSE ............................................................................................................................. ... ....................................................... 146 NOTE 32 COMMISSION INCOME AND EXPENSES ............................................................................................................................. ... ......................................................... 148 NOTE 33 NET FINANCIAL INCOME ............................................................................................................................. ... .................................................................................. 151 NOTE 34 INCOMES FROM INVESTMENTS IN COMPANIES ............................................................................................................................. ... ........................................... 153 NOTE 35 NON - CURRENT ASSETS AND DISPOSAL GROUPS NOT QUALIFYING AS DISCONTINUED OPERATIONS ............................................................................ 154 NOTE 36 OTHER OPERATING INCOME AND EXPENSES ............................................................................................................................. ... ............................................... 155 NOTE 37 EMPLOYEE BENEFIT OBLIGATION EXPENSES..................................................................................................................... ... ........................................................ 156 NOTE 38 ADMINISTRATIVE EXPENSE...................................................................................................................... ... ...................................................................................... 159 NOTE 39 DEPRECIATION AND AMORTISATION ............................................................................................................................. .. .............................................................. 160 NOTE 40 IMPAIRMENT OF NON - FINANCIAL ASSETS ............................................................................................................................. ... .................................................... 161 NOTE 41 CREDIT LOSS EXPENSE ............................................................................................................................. ... ...................................................................................... 162 NOTE 42 RESULTS FROM DISCONTINUED OPERATIONS................................................................................................................... ... ....................................................... 166 NOTE 43 RELATED PARTY DISCLOSURES.................................................................................................................. ... ................................................................................... 167 NOTE 44 FAIR VALUE OF FINANCIAL ASSETS AND FINANCIAL LIABILITIES ............................................................................................................................. ... ............... 174 NOTE 45 MATURITY OF FINANCIAL ASSETS AND LIABILITIES ACCORDING TO REMAINING MATURITIES .......................................................................................... 184 NOTE 46 FINANCIAL AND NON - FINANCIAL ASSETS AND LIABILITIES BY CURRENCY ............................................................................................................................. 186 NOTE 47 RISK MANAGEMENT AND REPORTING ............................................................................................................................. ... ........................................................... 187 NOTE 48 INFORMATION ON REGULATORY CAPITAL AND CAPITAL ADEQUACY INDICATORS ............................................................................................................. 218 NOTE 49 SUBSEQUENT EVENTS ............................................................................................................................. ... ....................................................................................... 223 C ons oli d ate d Fi n anc i al State me n ts Marc h 202 3 / B an c o San tan d e r C h ile 2 CONTENTS

In teri m C on s oli d ate d Fi n anci al Sta te me n t Marc h 20 23 / B an c o San ta n de r C hil e 3 Banco Santander - Chile and Affiliates INTERIM CONSOLIDATED STATEMENTS OF FINANCIAL POSITION As of March 31, 2023, and December 31, 2022 As of December 31, 2022 As of March 31, 2023 MCh$ MCh$ Note ASSETS 1,982,942 2,586,609 7 Cash and deposits in banks 843,816 865,384 7 Cash in collection process 11,827,006 11,631,884 8 Financial assets held for trading at fair value through profit or loss 11,672,960 11,490,794 Financial derivatives contracts 154,046 141,090 Debt financial instruments - - Other - - 9 Non - trading financial assets mandatorily measured at fair value - - 10 Financial assets designated at fair value through profit or loss 6,023,039 6,542,873 11 Financial assets at fair value through other comprehensive income 5,880,733 6,336,100 Debt financial instruments 142,306 206,773 Other 477,762 360,339 12 Financial derivative contracts for hedge accounting 42,560,431 42,615,414 13 Financial assets at amortised cost - - Rights under repurchase and securities lending agreements 4,867,591 4,755,740 Debt financial instruments 32,955 32,828 Interbank loans 17,043,575 16,875,526 Loans and receivables from customers - Commercial 15,622,418 15,908,392 Loans and receivables - Mortgage 4,993,892 5,042,928 Loans and receivables from customers - Consumers 46,586 47,952 14 Investment in companies 107,789 102,176 15 Intangible assets 189,364 185,707 16 Fixed assets 182,526 175,439 17 Assets with leasing rights 315 51 18 Current taxes 314,125 309,162 18 Deferred taxes 3,578,004 4,053,378 19 Other assets 30,899 29,400 20 Non - current assets and disposal groups for sale 68,164,604 69,505,768 TOTAL ASSETS The accompanying notes form an integral part of the consolidated financial statements.

In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 4 Banco Santander - Chile and Affiliates INTERIM CONSOLIDATED STATEMENTS OF FINANCIAL POSITION As of March 31, 2023, and December 31, 2022 As of December 31, As of March 31, MCh$ MCh$ Note LIABILITIES 746,872 791,211 7 Cash in collection process 11,319,320 11,126,412 21 Financial liabilities held for trading at fair value through profit or loss. 11,319,320 11,126,412 Financial derivatives contracts - - Other - - 10 Financial liabilities designated at fair value through profit or loss 2,788,794 3,065,761 12 Financial derivative contracts for hedge accounting 43,704,024 45,053,552 22 Financial liabilities at amortised cost 14,086,226 13,806,513 Deposits and other demand liabilities 12,978,790 14,265,830 Time deposits and other term equivalents 315,355 456,418 Obligations under repurchase and securities lending agreements 8,864,765 8,795,417 Interbank borrowing 7,165,893 7,415,774 Debt financial instruments issued 292,995 313,600 Other financial liabilities 137,089 132,939 17 Obligations under leasing contracts 2,324,116 2,289,506 23 Financial instruments of regulatory capital issued 172,826 122,918 24 Provisions for contingencies 247,508 538,233 25 Provisions for dividends, payments of interest and reappreciation of financial instruments of issued regulatory capital 331,519 331,990 26 Special provisions for credit risk 112,481 98,597 18 Current taxes 1 1 18 Deferred taxes 2,041,682 1,920,357 27 Other liabilities - - 20 Liabilities included in disposal groups for sale 63,926,232 65.471.477 TOTAL LIABILITIES EQUITY 891,303 891,303 28 Capital 2,815,170 2,815,170 28 Reserves (167,147) (220,237) 28 Other comprehensive income accrued income 597 518 Items that will not be reclassified to profit or loss (167,744) (220,755) Items that may be reclassified to profit or loss 28,339 836,990 Retained earnings (expense) from prior years 808,651 135,683 28 Profit (loss) for the year (247,508) (538,233) 28 Minus: provisions for dividends, interest payments and reappreciation of issued financial instruments of regulatory capital 4,128,808 3,920,676 Equity holders of the Bank 109,564 113,615 Non - controlling interest 4,238,372 4.034.291 TOTAL EQUITY 68,164,604 69.505.768 TOTAL LIABILITIES AND EQUITY The accompanying notes form an integral part of the consolidated financial statements.

In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 5 Banco Santander - Chile and Affiliates INTERIM CONSOLIDATED STATEMENTS OF INCOME For the periods ending March 31, 2023, and 2022 As of March 31, of 2022 2023 MM$ MM$ Nota 515,447 923,500 30 Interest income (293,639) (748,155) 30 Interest expense 221,808 175,345 30 Net interest income 235,295 148,464 31 Readjustment income (29,636) (46,928) 31 Readjustment expenses 205,659 101,536 31 Net readjustment income 172,129 209,176 32 Commission income (74,983) (79,241) 32 Commission expense 97,146 129,935 32 Net commission income Financial result per: 17,706 133,242 33 Assets and liabilities for trading - - 33 Non - trading financial assets mandatorily measured at fair value through profit or loss - - 33 Financial assets and liabilities designated at fair value through profit or loss 14,092 (36,561) 33 Gain or loss on derecognition of financial assets and liabilities at amortised cost and financial assets at fair value through other comprehensive income 25,060 (19,309) 33 Foreign exchange, readjustments and hedge accounting of foreign currencies - - 33 Reclassifications of financial assets due to changes in business model - - 33 Other financial results 56,858 77,372 33 Net financial result 1,360 1,542 34 Results from investments in companies (900) 2,929 35 Results of non - current assets and disposal groups not qualifying as discontinued operations 221 544 36 Other operating income 582,152 489,203 TOTAL OPERATING INCOME (97,546) (97,214) 37 Expenses from obligations to employee benefits (71,043) (77,297) 38 Administrative expenses (31,614) (36,047) 39 Depreciation and amortisation - - 40 Impairment of non - financial assets (19,686) (6,769) 36 Other operational expenses (219,889) (217,327) TOTAL OPERATIONAL EXPENSES 362,263 271,876 OPERATING INCOME BEFORE CREDIT LOSS The accompanying notes form an integral part of the consolidated financial statements.

Banco Santander - Chile and Affiliates INTERIM CONSOLIDATED STATEMENTS OF INCOME, continued For the periods ending March 31, 2023, and 2022 The accompanying notes form an integral part of the consolidated financial statements. Note As of March 31, of 2023 2022 MCh$ MCh$ Credit loss expenses due to: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 6 (86,614) (132,039) 41 Provisions for credit risk due from banks and loans and receivables from customers (2,918) (1,354) 41 Special provisions for credit risk 18,100 20,314 41 Recovery of impaired loans Impairment of the credit risk of other financial assets (15) (1,169) 41 at amortised cost and financial assets at fair value in other comprehensive income (71,447) (114,248) 41 Credit loss expense 290,816 157,628 OPERATIONAL RESULT 290,816 157,628 Results from continuing operations before taxes (51,110) (17,838) 18 Income tax 239,706 139,790 42 Results from continuing operations after tax - - 18 Results from discontinued operations before taxes - - Discontinued operations tax - - 42 Results from discontinued operations after tax 239,706 139,790 28 CONSOLIDATED PROFIT (LOSS) FOR THE YEAR (OR PERIOD) 235,743 135,683 28 Attributable to: Equity holders of the Bank 3,963 4,107 28 Non - controlling interest Earnings per share attributable to equity holders of the Bank: 1.25 1.25 0.72 0.72 28 28 Basic utility Diluted earnings

In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 7 Banco Santander - Chile and Affiliates INTERIM CONSOLIDATED STATEMENTS OF OTHER COMPREHENSIVE INCOME For the periods ending March 31, 2022, and 2023 As of March 31, 2022 2023 MCh$ MCh$ Note 239,706 139,790 CONSOLIDATED PROFIT (LOSS) FOR THE YEAR (OR PERIOD) Other comprehensive results for the year: ITEMS THAT WILL NOT BE RECLASSIFIED TO PROFIT OR LOSS - - New measurements of the net defined benefit liability (asset) and actuarial results for other employee benefit plans (61) (1,557) Changes in the fair value of equity instruments designated at fair value through other comprehensive income - - Changes in the fair value of financial liabilities designated at fair value through profit or loss attributable to changes in the credit risk of the financial liability - - Other (61) (1,557) 28 OTHER COMPREHENSIVE INCOME THAT WILL NOT BE RECLASSIFIED TO PROFIT OR LOSS BEFORE TAXES 17 420 18 Income tax on other comprehensive results that will not be reclassified to profit or loss (44) (1,137) 28 TOTAL OTHER COMPREHENSIVE INCOME THAT WILL NOT BE RECLASSIFIED TO PROFIT OR LOSS AFTER TAXES 28 ITEMS THAT MAY BE RECLASSIFIED TO PROFIT OR LOSS (15,669) 5,749 28 Changes in the fair value of financial assets at fair value through other comprehensive income - - 28 Translation differences by foreign entities - - 28 Hedge accounting of net investments in foreign entities (108,176) (78,329) 28 Cash flow hedge accounting - - 28 Undesignated elements of hedge accounting instruments 337 (37) 28 Other (123,508) (72,617) 28 OTHER COMPREHENSIVE INCOME THAT MAY BE RECLASSIFIED TO PROFIT OR LOSS BEFORE TAXES 31,999 19,607 18 Income taxes on other comprehensive income that may be reclassified to profit or loss (91,509) (53,010) 28 TOTAL OTHER COMPREHENSIVE INCOME THAT MAY BE RECLASSIFIED TO PROFIT OR LOSS AFTER TAXES (91,554) (54,147) 28 TOTAL OTHER COMPREHENSIVE INCOME FOR THE YEAR 148,151 85,643 28 CONSOLIDATED COMPREHENSIVE INCOME FOR THE PERIOD Attributable to: 144,202 82,593 Equity holders of the Bank 3,949 3,050 Non - controlling interest The accompanying notes form an integral part of the consolidated financial statements.

In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 8 Banco Santander - Chile and Affiliates INTERIM CONSOLIDATED STATEMENTS OF CASH FLOWS For the periods ending March 31, 2023, and 2022 March 31, 2022 2023 MCh$ MCh$ Notes CASH FLOWS FROM OPERATING ACTIVITIES: 290,816 157,628 CONSOLIDATED PRE - TAX INCOME FOR THE PERIOD (131,204) (258,448) Non - cash charges (credits) to profit or loss: 31,614 36,047 39 Depreciation and amortisation - - 40 Impairment of non - financial assets 107,631 134,562 41 Provisions for asset risk (36.773) Fair value adjustments transferred to profit or loss (1.360) (1.542) 34 Results from investments in companies (2,667) (2,176) 35 Results from the sale of goods received in payment or awarded in a judicial auction 40 (176) 35 Provisions for assets received in payment - - Profit/loss on sale of shareholding in other companies (19) (2,142) 35 Profit on sale of fixed assets 3,418 3.263 35 Penalty of assets received in lieu of payment (221.808) (276,881) Interest and adjustment net income (97.147) (129,935) 32 Net commission income 5,139 (533) Other non - cash charges (credits) to profit or loss 43,955 17,838 Income tax 934,687 765,239 Increase/decrease in operating assets and liabilities (136,713) (181,853) Decrease (increase) in loans and receivables from customers 1,485,534 (330,560) Decrease (increase) in financial investments - - Decrease (increase) from repurchase agreements (assets) 428 127 Decrease (increase) of interbank loans 1,195 (593) Decrease (increase) in assets received or awarded in payment (622,435) (262,909) Increase (decrease) in creditors in current accounts 28,752 1,287,041 Increase (decrease) in deposits and time deposits 9,890 (324) Increase (decrease) in liabilities to domestic banks (266,475) (117,266) Increase (decrease) in other deposits and sight accounts (126,345) (135,323) Increase (decrease) in liabilities to foreign banks (135,708) 66,299 Increase (decrease) in obligations to the Central Bank of Chile 68,303 141,063 Increase (decrease) in repurchase contracts (liabilities) 6,194 20,605 Increase (decrease) in other financial obligations 97,455 (127,884) Net increase in other assets and liabilities 750,741 1,071,964 Interest and readjustments received (323,275) (795,083) Interest and readjustments paid - - Dividends received from investments in companies 172,129 209,176 Fees and commissions received (74,983) (79,241) Fees and commissions paid 1,094,299 664,419 Total cash flow provided by (used in) operating activities The accompanying notes form an integral part of the consolidated financial statements.

In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 9 Banco Santander - Chile and Affiliates CONSOLIDATED STATEMENTS OF CASH FLOWS, continued For the periods ending March 31, 2023, and 2022 March 31, 2022 2023 MCh$ MCh$ Notes CASH FLOWS FROM INVESTMENT ACTIVITIES: (686) (7,526) 16 Purchases of fixed assets 98 2,200 Sales of fixed assets (6,769) (7,669) 15 Purchase of intangible assets - - Acquisitions of investments in companies (7,357) (12,995) Total cash flow provided by (used in) investment activities CASH FLOW FROM FINANCING ACTIVITIES: (460,493) 29,217 Attributable to shareholders' interest: 102,481 - Subordinated bond placement (7,491) (8,890) Redemption of subordinated bonds and interest payments - - Dividends paid (1,183) (966) Redemption and payment of interest/letters of credit capital 142,644 291,765 Placement of current bonds (2,758) (3,505) Redemption and payment of interest/principal on mortgage bonds (684,365) (246,730) Redemption and payment of interest/current bond capital - - Placement of bonds without fixed maturity - - Redemption and payment of interest/bonds without fixed maturity capital (9,821) (2,457) Interest payments/capital lease obligations - - Attributable to non - controlling interest: - - Payment of dividends and/or withdrawals of capital paid respectively to the subsidiaries corresponding to the non - controlling interest (460,493) 29,217 Total cash flows used in financing activities 626,449 680,641 D - NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS DURING THE PERIOD (21,377) (2,801) E - EFFECTS OF FOREIGN EXCHANGE RATE FLUCTUATIONS 2,881,558 1,982,942 F - INITIAL BALANCE OF CASH AND CASH EQUIVALENTS 3,486,630 2,660,782 FINAL BALANCE OF CASH AND CASH EQUIVALENTS The accompanying notes form an integral part of the consolidated financial statements, March 31 of Reconciliation of provisions for the Consolidated Statements of Cash Flows for the periods ended 2022 2023 MM$ MM$ Nota 107,631 134,562 Provision for loan loss for cash - flow purposes (18,100) (20,314) Recovery of impaired loans 89,531 114,249 41 Net provision for loan loss

In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 10 Banco Santander - Chile and Affiliates INTERIM CONSOLIDATED STATEMENTS OF CASH FLOWS, continued Changes other than cash 31,03,2023 Fair Value Changes UF Movement Foreign Currency Movement Acquisition Cash Flow Reconciliation of liabilities arising from financing activities MCh$ MCh$ MCh$ MCh$ MCh$ 1,737,368 - 12,388 - - (8,890) 1,733,870 Subordinated Bonds 7,334,176 - 208,668 - - 45,035 7,080,472 Senior bonds 78,767 - 649 - - (3,505) 81,623 Mortgage bonds 552,138 - - (38,108) - - 590,246 Bonds without fixed maturity - - - - - - - Dividends paid 132,939 - (1,693) - - (2,457) 137,089 Obligations under leasing contracts 9,835,388 - 220,013 (38,108) - 30,183 9,623,300 Total liabilities from financing activities

In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 11 Banco Santander - Chile and Affiliates INTERIM CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY For the periods ending March 31, 2023, and 2022 Equity attributable to shareholders Non - controlling interest (*) Accrued profits and profits corresponding to the period Other comprehensive income accrued income Reserves Total Equity TOTAL Profits of the year (**) Retained profits from previous periods Changes in the fair value of financial assets at fair value through OCI Merger of companies under common control Reserves and other retained earnings Capital Income tax Cash flow hedge MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ 3,729,277 94,360 3,634,917 (238,771) 778,933 132,913 (373,581) (113,696) (2,224) 2,560,040 891,303 Opening balances as of January 1, 2022 (464,977) - (464,977) - (464,977) - - - - - - Payment of common stock dividends - - - - (313,956) - - - - 313,956 - Reserves of income from the previous period (10,107) - (10,107) (10,107) - - - - - - - Provision for payment of common stock dividends (26,893) - (26,893) 1,370 28,339 - - - - (56,602) - Provision and interest payments on bonds with no fixed term to maturity 21 21 - - - - - - - - - Subtotal: Transactions with shareholders during the period (501,956) 21 (501,977) (8,737) (750,594) - - - - 257,354 - Profit for the year (period) 823,857 15,206 808,651 808,651 - - - - - - - Other comprehensive income for the year 187,194 (23) 187,217 - - (71,092) 254,743 3,566 - - - Subtotal: Comprehensive income for the year 1,011,051 15,183 995,868 808,651 - (71,092) 254,743 3,566 - - - Closing balance on December 31, 2022 4,238,372 109,564 4,128,808 561,143 28,339 61,821 (118,838) (110,130) (2,224) 2,817,394 891,303 4,238,372 109,564 4,128,808 561,143 28,339 61,821 (118,838) (110,130) (2,224) 2,817,394 891,303 Opening balances as of January 1, 2023 - - - - - - - - - - - Payment of common stock dividends - - - (808,651) 808,651 - - - - - - Reserves of income from the previous period (283,277) - (283,277) (283,277) - - - - - - - Provision for payment of common stock dividends (7,488) - (7,488) (7,488) - - - - - - - Provision and interest payments on bonds with no fixed term to maturity 1,001 1,001 - - - - - - - - - Other movements (289,724) 1,001 (290,725) (1,099,376) 808,651 - - - - - Subtotal: Transactions with shareholders during the period 139,790 4,107 135,683 135,683 - - - - - - - Profit for the year (period) (54,147) (1,057) (53,090) - - 19,636 (78,329) 5,603 - - - Other comprehensive income for the year 85,643 3,050 82,593 135,683 - 19,636 (78,329) 5,603 - - - Subtotal: Comprehensive income for the period 4,034,291 113,615 3,920,676 (402,550) 836,990 81,457 (197,167) (104,527) (2,224) 2,817,394 891,303 Closing balance on March 31, 2023 (*) See Note 02 letter c for non - controlling interest. (**) Contains profit for the year and provisions for dividends, interest payments and reappreciation of issued financial instruments of regulatory capital. Allocated dividends Allocated to reserves Profit attributable to equity holders Period MCh$ MCh$ MCh$ 309,984 774,959 Year 2021 (Shareholders Meeting April 2022) 206,979 517,447 Year 2020 (Shareholders Meeting April 2021) The accompanying notes form an integral part of the consolidated financial statements

Banco Santander - Chile and Affiliates NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS As of March 31 , 2023 and 2022 , and December 31 , 2022 NOTE 01 - BACKGROUND OF THE INSTITUTION Banco Santander - Chile is a banking corporation organised under the laws of the Republic of Chile, supervised by the Financial Market Commission (FMC) . It is also subject to the regulations of the Securities and Exchange Commission of the United States of America (SEC), considering the Bank is listed on the New York Stock Exchange (NYSE) through an American Depositary Receipt (ADR) programme . Banco Santander Spain manages Banco Santander Chile through its shareholdings in Teatinos Siglo XXI Inversiones SA and Santander Chile Holding SA, both subsidiaries controlled by Banco Santander Spain . As of March 31 , 2023 , Banco Santander Spain directly or indirectly owns 99 . 5 % of Santander Chile Holding SA and 100 % of Teatinos Siglo XXI Inversiones SA, which allows Banco Santander Spain control over 67 . 18 % of the Bank's shares . The Bank provides its customers with a wide range of general banking services, from individuals to large corporations . In addition, Banco Santander - Chile and its affiliates (collectively referred to as 'Bank' or 'Santander - Chile' hereafter) offer consumer and commercial banking services, as well as other services, including factoring, collection, leasing, securities and insurance brokerage, mutual and investment funds, investment fund management and investment banking . The Bank's legal address is Calle Bandera N ƒ 140 Santiago de Chile, and its website is www . santander . cl NOTE 02 - BREAKDOWN OF SIGNIFICANT ACCOUNTING CRITERIA a. Basis of preparation These Consolidated Financial Statements have been prepared following the Compendium of Accounting Standards for Banks (CASB), in its version applicable as of January 2022 , as well as the instructions issued by the Financial Market Commission (FMC) . Per Law No 21 , 000 , article 5 . 6 , the Financial Market Commission is a supervising entity that may set the rules for the preparation and presentation of the annual reports, balance sheets, statements of financial position and other financial statements of the supervised entities and determines the principles to which they must keep their accounts . Regarding all matters that are not covered by this regulation, if they do not conflict with its instructions, then they must adhere to generally accepted accounting criteria corresponding to the technical standards issued by the Chilean Association of Accountants AG, which align with the International Financial Reporting Standards (IFRS) agreed by the International Accounting Standards Board (IASB) . In case of discrepancies between the accounting principles and the accounting criteria issued by the FMC in its Compendium of Accounting Standards for Banks and instructions, the latter shall prevail . The Bank uses certain currency terms and conventions for the present Consolidated Financial Statements . Thus, 'USD' stands for 'US dollar', 'EUR' stands for 'euro', 'CNY' stands for 'Chinese yuan', 'JPY' stands for 'Japanese yen', 'CHF' stands for 'Swiss franc', 'AUD' stands for 'Australian dollar' and 'UF' stands for 'Unidad de Fomento de Chile' . The notes in the Interim Consolidated Financial Statements contain information additional to that presented in the Interim Consolidated Statements of Financial Position, the Interim Consolidated Income Statements, Interim Consolidated Statements of Other Comprehensive Income, Interim Consolidated Statements of Changes in Equity and Interim Consolidated Statements of Cash Flows . They provide narrative descriptions or detailed breakdowns of such statements in a clear, relevant, reliable and comparable manner . b. Basis of preparation for the Consolidated Financial Statements The Interim Consolidated Financial Statements as of March 31 , 2023 , and 2022 incorporate the individual interim financial statements of the Bank and those of companies over which the Bank exerts control (affiliates) and include the adjustments, reclassifying and eliminations necessary to abide by the accounting and measurement criteria established by IFRS 10 'Consolidated Financial Statements' . Control is achieved when the Bank : i. Has power over the investee (that is, the Bank presently has rights that bestow it with the capacity to manage the relevant activities of the investee); ii. Has exposure or rights to variable returns from its involvement with the investee; and iii. Has the ability to use its power over the investee to influence the amount of the investor's returns. In teri m C on s oli d ate d Fi n anci al Sta te me n t Marc h 20 23 / B an c o San ta n de r C hil e 12

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31 , 2023 , and 2022 , and December 31 , 2022 NOTE 02 - BREAKDOWN OF SIGNIFICANT ACCOUNTING CRITERIA, continued The Bank reassesses whether it controls an investee when facts or circumstances indicate that there are changes to one or more of the three requisites of control listed above . For example, when the Bank has less than most of the voting rights in an investee, but those voting rights are sufficient to have the ability to direct the relevant activities, then it is concluded that the Bank has control . The Bank considers all relevant factors and circumstances when assessing whether the Bank's voting rights in an investee are sufficient to give it power . These include : The size of the Bank's holding of voting rights relative to the size and dispersion of holdings of the other vote holders. The potential voting rights held by the Bank and other vote holders or other parties. The rights arising from other contractual agreements. Any additional facts and circumstances that indicate that the Bank has or does not have the current ability to direct the relevant activities when decisions need to be taken, including voting patterns at previous shareholders' meetings. Consolidation of a subsidiary begins when the Bank obtains control of the subsidiary and ceases when the Bank cedes control . Specifically, the income and expenses of a subsidiary acquired or disposed of during the year are included in the Interim Consolidated Statements of Income and Interim Statements of Other Comprehensive Income from the date the Bank gains control until the date the Bank ceases to control the subsidiary . Profit or loss alongside each component of the Interim Consolidated Statements of Other Comprehensive Consolidated Income is attributed to the Bank's holders and non - controlling interest . The total comprehensive income of subsidiaries is attributed to the owners of the Bank and the non - controlling interests, even if this results in a deficit for the non - controlling interests in certain circumstances . When necessary, adjustments are made to the financial statements of the subsidiaries to ensure their accounting policies are consistent with the Bank's accounting policies . All balances and transactions between consolidated entities are eliminated . Changes in the consolidated entities' participation that do not result in the loss of control are accounted for as equity transactions . Accordingly, the equity carrying value of the Bank holders and the non - controlling interests are adjusted to reflect the changes in participation over subsidiaries . Any difference between the amount by which the non - controlling interests are adjusted and the fair value of the consideration being paid or received is recognised directly in equity and attributed to the Bank holders . The non - controlling interest represents the participation of third parties in the Bank's consolidated equity, which is presented in the Interim Consolidated Statements of Changes in Equity . Their share of the result for the year is shown as 'Profit attributable to non - controlling interest' in the Interim Consolidated Statements of Income . The following table shows the composition of the entities over which the Bank can exercise control and, therefore, belong to the consolidation perimeter in such capacity : In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 13

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and December 31, 2022 NOTE 02 - BREAKDOWN OF SIGNIFICANT ACCOUNTING CRITERIA, continued i. Entities controlled by the Bank through participation in equity In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 14 Percentage of ownership As of March 31, As of December 31, As of March 31, 2022 2022 2023 Place of Total Indirect Direct Total Indirect Direct Total Indirect Direct Incorporation % % % % % % % % % And Operation Main Activity 99.76 0.01 99.75 99.76 0.01 99.75 99.76 0.01 99.75 Santiago, Chile Insurance brokerage Santander Corredora de Seguros Limitada 51.00 0.41 50.59 51.00 0.41 50.59 51.00 0.41 50.59 Santiago, Chile Brokerage of financial instruments Santander Corredores de Bolsa Limitada 99.03 - 99.03 99.03 - 99.03 99.03 - 99.03 Santiago, Chile Securities brokerage Santander Asesorías Financieras Limitada 99.64 - 99.64 99.64 - 99.64 99.64 - 99.64 Santiago, Chile Acquisition of loans and issuance of debt securities Santander SA Sociedad Securitizadora 50.10 - 50.10 50.10 - 50.10 50.10 - 50.10 Santiago, Chile Insurance brokerage Klare Corredora de Seguros SA 51.00 - 51.00 51.00 - 51.00 51.00 - 51.00 Santiago, Chile Automotive financing Santander Consumer Finance Limitada 100.00 0.01 99.99 100.00 0.01 99.99 100.00 0.01 99.99 Santiago, Chile Card Operator Sociedad Operadora de Tarjetas de Pago Santander Getnet Chile SA Details of non - controlling interests are shown in Note 28 in Equity, letter g) non - controlling interest (minority interests). ii. Entities controlled by the Bank through other considerations The following companies have been consolidated based on the fact that their relevant activities are determined by the Bank (these are companies complementary to the banking sector) and, therefore, over which the Bank exercises control : Santander Gestión de Recaudación y Cobranza Limitada: its exclusive activity is administering and collecting loans. Banca Santander SA: its main activity is financing revolving inventory lines for automotive dealers. Multiplica SpA: its primary purpose is the development of incentive programmes that encourage the use of payment cards. iii. Associated entities An associate is an entity over which the Bank can exercise significant influence but not control or joint control . This capacity usually involves 20 % or more interest in the entity's voting rights and is accounted for using the equity method under IAS 28 ‘Investments in Associates and Joint Ventures’ . The following entities in which the Bank has an interest and are recognised using the equity method are considered 'associates' :

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and December 31, 2022 NOTE 02 - BREAKDOWN OF SIGNIFICANT ACCOUNTING CRITERIA, continued In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 15 Percentage of ownership As of March 31, As of December 31, As of March 31, Place of incorporation 2022 2022 2023 and operation % % % Main Activity Associates 33.43 33.43 33.43 Santiago, Chile ATM service Redbanc SA 25.00 25.00 - Santiago, Chile Debit and credit card service Transbank SA 33.33 33.33 33.33 Santiago, Chile Electronic fund transfer and compensation services Centro de Compensación Automatizado SA 29.29 29.29 29.29 Santiago, Chile Repository of publicly offered securities Sociedad Interbancaria de Depósito de Valores SA 15.00 15.00 15.00 Santiago, Chile Payment clearing Cámara Compensación de Alto Valor SA 20.00 20.00 20.00 Santiago, Chile Administration of smart cards for public transportation Administrador Financiero del Transantiago SA 12.48 12.48 12.48 Santiago, Chile Administration of the infrastructure for the financial market of derivative instruments Servicios de Infraestructura de Mercado OTC SA In the case of the Cámara Compensación Alto Valor SA, Santander - Chile has a representative participating in its Board of Directors . Management has concluded that this entails an exercise of significant influence over the latter . In the case of Servicios de Infraestructura de Mercado OTC SA, the Bank participates actively in its administration through its executives, which is why Management has concluded that it exercises significant influence over it . iv. Share or rights in other companies Entities over which the Bank has no control or significant influence are presented in this category . These equity instruments must be measured at fair value in compliance with IFRS 9 ‘Financial Instruments’ . Nevertheless, the Bank may consider the cost an appropriate fair value estimate in concrete circumstances . This may be the case if the most recently available information is insufficient to measure the fair value or if there is a wide range of possible fair values and the cost involved represents the best estimate of fair value within that range . Another consideration is that the Bank can take the irrevocable decision to present subsequent changes to the fair value in other comprehensive income during its initial recognition . Subsequent changes in this valuation shall be recognised in 'Other comprehensive income accrued - Items that will not be reclassified to profit or loss' . Dividends received from these investments are recorded in the Interim Consolidated Statement of Income under 'Result from investments in companies' . These instruments are not subject to the IFRS 9 ‘Financial Instruments’ impairment model . c. Non - controlling interest Non - controlling interest represents the portion of net income and net assets the Bank does not own, either directly or indirectly . It is presented as 'Attributable to owners of the Bank' separately in the Interim Consolidated Statements of Income and separately from the equity in the Interim Consolidated Statements of Financial Position . In the case of entities controlled by the Bank through other considerations, profit and equity are presented fully as a non - controlling interest . This is because the Bank controls them but has no ownership expressed as a percentage .

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31 , 2023 , and 2022 , and December 31 , 2022 NOTE 02 - BREAKDOWN OF SIGNIFICANT ACCOUNTING CRITERIA, continued d. Operating segments The Bank's operating segments are those units whose operating results are reviewed regularly by the highest authority in the decision - making . Accordingly, two or more operating segments can be added into one only when the aggregation is consistent with the basic principle under the IFRS 8 'Operating Segments' and if the segments have similar economic characteristics and are alike in each one of the following aspects : i. The nature of the products and services; ii. The nature of production processes; iii. The type of customer category for which its products and services are intended; iv. The methods used to distribute their products or provide services; and v. If applicable, the nature of the regulatory framework, e.g., banking, insurance or public services. The Bank reports separately for each operating segment that meets any of the following quantitative thresholds : i. Its reported revenues from ordinary activities, including both sales to external customers and intersegment sales or transactions, equal or exceeding 10 % of the revenues from the combined operating segments' ordinary internal and external activities . ii. The amount of its reported results is, in absolute terms, equal to or greater than 10 % of the amount that is larger between (i) the combined profit reported by all operating segments that have not reported a loss ; and (ii) the combined loss reported by all operating segments that have reported a loss . iii. Its assets equal or exceed 10 % of the combined assets of all operating segments . Operating segments that do not meet any of the quantitative thresholds may be considered segments that must be reported . In such cases, their information must be separately disclosed if management believes it would be helpful for users of the Interim Consolidated Financial Statements . Information regarding other business activities that do not correspond to reportable segments is combined and disclosed within the Corporate Activities category 'other' . According to the above presented, the Bank's segments were obtained under the consideration that an operating segment is a component of an entity that: i. Engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses from transactions with other elements of the same entity). ii. Whose operating results are regularly reviewed by the entity's chief executive officer or manager, who makes decisions concerning resources allocated to the segment and assesses its performance. iii. For which discrete financial information is available. e. Functional and presentation currency The Bank, per 'The Effects of Changes in Foreign Exchange Rates' in IAS 21 , has defined the Chilean Peso as its functional and presentation currency, as it is the currency of the primary economic environment in which the Bank operates, as well as the currency that influences in the cost and revenue structure . Therefore, all balances and transactions denominated in currencies other than the Chilean Peso are considered 'foreign currency' . f. Foreign currency transactions The Bank conducts transactions in amounts denominated in foreign currencies, mainly US dollars . The assets and liabilities denominated in foreign currencies held by the Bank and its affiliates are translated into Chilean Pesos at the market exchange rate corresponding to the end of the reported month (discounted spot rate), which amounted to $ 794 . 35 per US $ for March 2023 ( $ 784 . 19 per US $ for March 2022 and US $ 849 . 59 for December 2022 ) . In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 16

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and December 31, 2022 NOTE 02 - BREAKDOWN OF SIGNIFICANT ACCOUNTING CRITERIA, continued The net foreign exchange gain and loss includes recognising the effects of exchange rate changes on assets and liabilities denominated in foreign currencies and the profit and loss on foreign exchange spot and forward transactions undertaken by the Bank . g. Cash and cash equivalents The indirect method is used to prepare the Interim Consolidated Cash Flow Statements . This one starts with the Bank's consolidated pre - tax income and incorporates non - cash transactions, as well as the income and expenses related to cash - flows activities classified as investments or financing . The following concepts are taken into consideration in the preparation of the Interim Consolidated Cash Flow Statements: i. Cash flows: inflows and outflows of cash and cash equivalents, defined as balances in items such as deposits with the Central Bank of Chile, deposits in domestic banks and deposits abroad. ii. Operating activities: these are the normal activities carried out by banks alongside other activities that cannot be classified as investments or financing. iii. Investing activities: these correspond to the acquisition, sale or disposal by other means of long - term assets and other investments not included in cash and cash equivalents. iv. Financing activities: activities that result in changes to the size and composition of equity and liabilities which are not part of operating or investing activities. h. Definitions, classification and measurement of financial assets/liabilities i. Definitions A 'financial instrument' is any contract that gives rise to a financial asset in an entity and a financial liability or equity instrument in another entity . A 'financial asset' is any asset that is : (a) cash ; (b) an equity instrument of another entity ; (c) a contractual right to receive cash or another financial asset from another entity or to exchange financial assets or financial liabilities with another entity under conditions that are potentially favourable to the entity ; or (d) a contract that will or may be settled using the entity's own equity instruments . A 'financial liability' is any liability that is : (a) a contractual obligation to deliver cash or another financial asset to another entity or to exchange financial assets or financial liabilities with another entity under conditions that are potentially unfavourable to the entity ; or (b) a contract that will or may be settled using the entity's equity instruments . An 'equity instrument' is any contract that evidences a residual interest in the assets of the issuing entity after deducting all its liabilities . A 'financial derivative' is a financial instrument whose value fluctuates in response to changes concerning an observed market variable (such as an interest rate, a foreign exchange rate, a financial instrument's price, or a market index, including credit ratings), whose initial investment is minimal compared with other financial instruments with a similar response to changes in market factors, and which is generally settled at a future date . 'Fair value' is the price that would be received to sell an asset or paid to transfer a liability in a transaction between market participants at the measurement date . ii. Initial recognition In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 17

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31 , 2023 , and 2022 , and December 31 , 2022 NOTE 02 - BREAKDOWN OF SIGNIFICANT ACCOUNTING CRITERIA, continued The Bank shall recognise a financial asset or financial liability only when it becomes part of the contractual terms of the instrument (rights and obligations) . A conventional purchase or sale of financial assets shall be recognised using trade date accounting or settlement date accounting . iii. Classification of financial assets/liabilities Classification of financial assets Financial assets shall be classified into measurement categories based on the entity's business models for managing the financial assets and their contractual cash flow characteristics . The business model refers to how the Bank manages its financial assets to generate cash flows . In other words, the entity's business model determines whether the cash flows will come by obtaining contractual cash flows, selling financial assets, or both . The assessment of the contractual flow characteristics (SPPI test) requires determining whether the asset's contractual flows are solely payments of principal on specified dates and interest on the principal outstanding amounts in the currency in which the financial asset is denominated . The principal is the fair value of the financial asset at initial recognition . Nevertheless, the principal’s figure may change over the life of the financial asset (if there are principal repayments) . Interest is the compensation received for the time value of money and the credit risk related to the principal amount owed over a specified period, alongside other basic lending risks such as administrative costs and a profit margin . For the evaluation, the Bank conducted a test evaluating whether the contractual flows meet the criteria for a core lending arrangement . The Bank uses its professional assessment and considers relevant factors such as currency, interest rate (fixed or variable) and the period it sets . The assessment of business models is not an instrument - by - instrument ranking approach but works at a higher level of aggregation and considers all relevant evidence : model performance, risks affecting performance, and how managers are rewarded, among others . According to the above, the objectives of the business models are : To hold assets to collect cash flows – through management that produces cash flows by collecting contractual payments throughout the instrument's life . Models with this goal allow for sales if they are infrequent (even if significant in value) or insignificant in value both individually and in aggregate (even if frequent), and even more so if they result from a substantial increment in risk, or the risk management of credit concentration . To maintain for collection and sale of financial assets . Per this objective, the entity's key management personnel have decided that the supply of contractual cash flows and the sale of financial assets are essential to achieve the business model's goal . Therefore, there is a higher frequency and value of sales for this purpose . Other models - financial assets are measured at fair value through profit or loss if not held within a business model whose objective is to hold the assets to collect contractual cash flows or if their objective is achieved by obtaining contractual cash flows and selling financial assets . Assets are managed on a sales basis, and decisions are made on a fair value basis . The Bank classifies its financial assets depending on whether they are subsequently measured at amortised cost, at fair value through other comprehensive income or at fair value through profit or loss In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 18

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31 , 2023 , and 2022 , and December 31 , 2022 NOTE 02 - BREAKDOWN OF SIGNIFICANT ACCOUNTING CRITERIA, continued Furthermore, at initial recognition of investments in equity instruments, an irrevocable decision can be made to present subsequent changes in fair value into other comprehensive income . Due to the exceptional changes that have taken place in the market's liquidity, and which should remain in the short and medium - term, the need arose for the Bank to maintain collateral with a maturity in the range of 2024 to 2026 . This is due to the constitution of guarantees related to the Central Bank's Credit Facility Conditional to Incremental Flexibility programme (FCIC) and the demand to constitute larger technical reserves due to the increase in the balances held by the Bank's customers . Given the above, the Bank determined to create a new business model called 'Held to collect investments', which aims to manage these higher levels of liquidity better . The Bank also has the intention and the ability to hold them to maturity . Classification of financial liabilities An entity shall classify all financial liabilities as subsequently measured at amortised cost, except for derivative liabilities measured at fair value through profit or loss . Reclassifying Reclassifying occurs only when the business model for managing financial assets is changed . These changes are determined by top management due to external or internal changes . Financial liabilities are not reclassified . iv. Measurement of financial assets/liabilities Initial measurement Financial assets and liabilities are initially measured at fair value (transaction price), plus or minus transaction costs in the case of a financial asset or financial liability that is not carried at fair value through profit or loss . Subsequent measurement of financial assets A financial asset shall subsequently be measured according to the following : (a) Amortised cost A financial asset is measured at amortised cost if the financial asset is held within a business model whose objective is to hold financial assets to earn cash flows, and the contractual terms of the financial asset give rise, at specified dates, to cash flows that are solely payments of principal and interest on the principal amount outstanding . Interest income shall be calculated using the effective interest method . This method applies to financial assets and liabilities measured at amortised cost (interest income and interest expense) . The effective interest rate is the rate that discounts with precision the estimated future cash payments or receipts through the expected life of the financial asset or financial liability to the gross carrying amount of the financial asset or the amortised cost of a financial liability . (b) Fair value through other comprehensive income A financial asset is measured at fair value through other comprehensive income if the financial asset is held within a business model whose objective is achieved by obtaining contractual cash flows and selling financial assets and if the contractual terms of the financial asset give rise, at specified dates, to cash flows that are solely payments of principal and interest on the principal amount outstanding . (c) Fair value through profit or loss . A financial asset is measured at fair value through profit or loss unless measured at amortised cost or at fair value through other comprehensive income . (d) Irrevocable election to measure at fair value with changes in other comprehensive income . Upon initial recognition of an investment in equity instruments, an election may be made to present subsequent changes in fair value in other comprehensive income that would otherwise be measured at fair value through profit or loss when not held for trading, except for dividend income, which is recognised in profit or loss . Gains or losses arising from the derecognition of these equity instruments are not transferred to profit or loss . In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 19

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and December 31, 2022 NOTE 02 - BREAKDOWN OF SIGNIFICANT ACCOUNTING POLICIES, continued Subsequent measurement of financial liabilities Financial liabilities are subsequently measured at amortised cost, except for derivatives measured at fair value through profit or loss . v. Derecognition of financial assets/liabilities A financial asset shall be derecognised when and only when: (a) The contractual rights to the cash flow from the financial asset expire, or (b) It transfers the contractual rights to receive the cash flows of a financial asset, or it retains the contractual rights to receive the cash flows of a financial asset but assumes a contractual obligation to pay them to one or more recipients . Otherwise, if the risks and rewards of ownership of the financial asset are substantially transferred, the financial asset is derecognised . In the case of unconditional sales, sales under repurchase agreements at fair value at the date of repurchase, sales of financial assets with a purchased call option or a written put option that is deeply out of the money, uses of assets where the transferor does not retain subordinated financing or grant any credit enhancement to the new owners, and other similar cases, the transferred financial asset is derecognised from the Interim Consolidated Statement of Financial Position with simultaneous recognition of any rights or obligations retained or created as a result of the transfer . In the case of sales of financial assets under fixed - price repurchase agreements or using the sale price plus interest of securities lending agreements in which the borrower must return the same or similar assets and in other akin cases, the transferred financial asset is not derecognised from the Interim Consolidated Statements of Financial Position and continues to be measured on the same basis as before the transfer . A financial liability is derecognised when and only when it is extinguished – that is, when the obligation specified in the contract is discharged, cancelled or expired . In the case of loans, the FMC requirements for derecognition apply . See letter o), VIII . vi. Offsetting a financial asset with a financial liability A financial asset and a financial liability shall be offset and presented by their net amount in the Interim Consolidated Statement of Financial Position when, and only when, there is at the moment a legally enforceable right to set off the recognised amounts and an intention to settle the net amount or to realise the asset and settle the liability simultaneously . As of March 31 , 2023 , and 2022 the Bank has no financial asset/liability offsets . i. Financial derivatives and accounting hedges Derivatives are classified as either trading instruments or hedging instruments. The Bank uses financial derivatives for the following purposes: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 20 iii. i. To provide such instruments to customers who request them to manage their market and credit risks. ii. To use them for the risk management of the proprietary position of the Bank's entities and their assets and liabilities ('hedging derivatives'). To benefit from changes in the value of these derivatives (trading derivatives). Trading derivatives are measured at fair value through profit or loss and are presented as assets/liabilities according to their positive or negative fair value. Derivatives that do not qualify as hedging instruments are accounted for as trading instruments.

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31 , 2023 , and 2022 , and December 31 , 2022 NOTE 02 - BREAKDOWN OF SIGNIFICANT ACCOUNTING POLICIES, continued The Bank has elected to continue to use the IAS 39 guidelines for hedge accounting. For a financial derivative to be considered a hedging derivative, all the following conditions must be met: 1. To cover one of the following three types of risk: a. Changes in the value of assets and liabilities due to fluctuations in, among other things, inflation (UF), interest rates and/or exchange rates to which the position or balance to be hedged is subject ('fair value hedging'). b. Changes in the estimated cash flows arising from financial assets and liabilities, commitments and highly probable forecast transactions ('cash flow hedges'). c. The net investment in a foreign operation ('hedge of a net investment in a foreign operation'). 2. To effectively eliminate risks inherent to the hedged item or position for the entire expected term of the hedge, which entails that : a. At the date of arrangement, the hedge is expected, under normal conditions, to be highly effective ('prospective effectiveness') . b. There is sufficient evidence that the hedge was effective during the life of the hedged item or position ('retrospective effectiveness') . 3. There must be adequate documentation evidencing the specific designation of the financial derivative to hedge certain balances or transactions and how this effective hedge was expected to be achieved and measured, provided that this is consistent with the Bank's management of its risks . The changes in the value of financial instruments qualifying for hedge accounting are recorded as follows : a. For fair value hedges, the gains or losses arising on both hedging instruments and the hedged items (attributable to the type of risk being hedged) are included as 'Net income (expense) from financial operations' in the Interim Consolidated Statement of Income . b. For fair value hedges of interest rate risk on a portfolio of financial instruments, gains or losses that arise in measuring hedging instruments and other gains or losses due to fair value changes of the underlying hedged item (attributable to the hedged risk) are recorded in the Interim Consolidated Financial Statement of Income under 'Interest and indexation income' . c. For cash flow hedges, the effective portion of the change in the value of the hedging instrument is recorded in the Interim Consolidated Statements of Other Comprehensive Income in 'Valuation accounts - cash flow hedges' within equity . d. Differences in the valuation of the hedging instrument corresponding to the ineffective portion of cash flow hedging transactions are taken directly to the Interim Consolidated Income Statements in 'Net income from financial operations' . If a derivative designated as a hedge, whether due to termination, ineffectiveness or any other cause, does not meet the above requirements, hedge accounting is discontinued . When 'fair value hedging' is discontinued, the fair value adjustments to the carrying amount of the hedged item arising from the hedged risk are amortised to gain or loss from that date, when applicable . When cash flow hedges are discontinued, the cumulative gain or loss on the hedging instrument recognised in the Interim Consolidated Statements of Other Comprehensive Income in equity 'Valuation Accounts' (while the hedge was effective) continues to be recognised in equity until the hedged transaction occurs . At that time, it is recognised in the Interim Consolidated Statements of Income unless the transaction is not expected to occur, in which case it is recognised immediately in the Consolidated Statements of Income . Embedded derivatives in hybrid financial instruments Embedded derivatives' is a hybrid contract component that simultaneously includes a host contract that is not a derivative and a financial derivative that is not individually transferable . It has the effect that some of the cash flows of the hybrid contract vary in the same way as the embedded derivative would if taken alone . As of March 31 , 2023 , and 2022 , and December 31 , 2022 , Banco Santander - Chile did not hold embedded derivatives in its portfolio . In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 21

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31 , 2023 , and 2022 , and December 31 , 2022 NOTE 02 - BREAKDOWN OF SIGNIFICANT ACCOUNTING CRITERIA, continued j. Fair value of financial assets and liabilities No transaction costs are deducted when financial assets and liabilities are measured at fair value . Assets and liabilities subsequently measured at amortised cost are not required to be measured at fair value . 'Fair value' is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction in the principal market at the measurement date under current market conditions (i . e . , an exit price) regardless of whether that price is directly observable or estimated using another valuation technique . Fair value measurement is for a specific asset or liability . Therefore, in measuring fair value, the Bank considers the characteristics of the asset or liability in the same way that market participants would consider in pricing the asset or liability at the measurement date . In addition, the fair value measurement assumes that the transaction of selling the asset or transferring the liability takes place either : (a) in the principal market for the asset or liability or (b) in the absence of a principal market, the most advantageous market for the asset or liability . When there is no market price for a given financial instrument, its fair value is estimated based on the price established in recent transactions involving similar instruments or, in the absence thereof, based on valuation models sufficiently contrasted by the international financial community, considering the specific peculiarities of the instrument to be valued and, in particular, the different types of risk related to the instrument . When valuation techniques are used, they maximise the use of the relevant observable input data and minimise that of unobservable input data . For example, when an asset or a liability measured at fair value has a bid price and an asking price, the price within the bid - ask spread that is most representative of fair value in the circumstances shall be used to measure fair value regardless of where the input is categorised within the fair value hierarchy . Although average prices are allowed as a practical resource to determine the fair value of an asset or a liability, the Bank makes an adjustment (FVA or fair value adjustment) when there is a gap between the purchase and sale price (close - out cost) . All derivatives are recorded in the Interim Consolidated Statements of Financial Position at fair value from the trade date . If their fair value is positive, they shall be recorded as an asset ; if their fair value is negative, they shall be recorded as a liability . In the absence of evidence to the contrary, the trade date's fair value is deemed the transaction price . Changes in the fair value of derivatives from the trade date are recognised with a balancing entry in the Interim Consolidated Income Statements under 'Profit/(loss) on financial assets/liabilities held for trading at fair value through profit or loss' . Specifically, the fair value of financial derivatives included in the trading books is deemed similar to their daily quoted price . If, for exceptional reasons, the quoted price cannot be determined on a given date, the fair value is calculated using similar methods to those used for over - the - counter (OTC) derivatives . The fair value of OTC derivatives is the sum of the future cash flows stemming from the instrument that have been discounted to the present value at the appraisal date ('present value' or 'theoretical closure') using valuation techniques commonly used by the financial markets : 'net present value' (NPV) and option pricing models, among other methods . Also, within the fair value of derivatives are included the Credit Valuation Adjustment (CVA) and the Debit Valuation Adjustment (DVA), aiming for the fair value of each instrument to include the credit risk of its counterparty and the Bank's own risk . The Counterparty Credit Risk (CVA) is a valuation adjustment to derivatives contracted in non - organised markets as a result of the exposure to counterparty credit risk . The CVA is calculated considering the potential exposure to each counterparty in future periods . The Debit Valuation Adjustment (DVA) is a valuation adjustment similar to CVA but generated by the Bank's credit risk assumed by our counterparties . In the case of derivative instruments contracted with Central Clearing Houses, where the variation margin is contractually defined as a firm and irrevocable payment, this payment is considered part of the derivative's fair value . For loans and advances covered by fair value hedging transactions, changes in their fair value related to the risk or risks covered in these hedging transactions are recorded . In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 22

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31 , 2023 , and 2022 , and December 31 , 2022 NOTE 02 - BREAKDOWN OF SIGNIFICANT ACCOUNTING CRITERIA, continued Equity instruments and contracts related to them must be measured at fair value . Nevertheless, the Bank believes the cost is an appropriate fair value estimate in specific circumstances . This may be necessary, for example, if the recently available information is insufficient to measure the fair value or if a wide range of possible fair value measures exists, and the cost represents the best fair value estimate within that range . Furthermore, the Bank may irrevocably elect to present subsequent changes in the instrument's fair value in other comprehensive income . As of March 31 , 2023 , and 2022 , and December 2022 , no significant investments in listed financial instruments had ceased to be recorded at their quoted market value due to their market being unable to be considered active . The amounts at which financial assets/liabilities are recorded represent, in all material respects, the Bank's maximum exposure to credit risk at each reporting date . The Bank also has collateral and other credit enhancements to mitigate its exposure to credit risk, consisting mainly of mortgages, cash, equity and personal guarantees, leased and rented assets, assets purchased under repurchase agreements, securities lending and credit derivatives . Valuation techniques According to IFRS 13 , a fair value hierarchy is established based on three levels : Level 1 , Level 2 and Level 3 , in which the highest priority is given to quoted prices (unadjusted) in active markets for identical assets and liabilities and the lowest priority to unobservable inputs . Financial instruments at fair value and determined by published prices in active markets (Level 1 ) comprise government bonds, corporate bonds, exchange - traded derivatives, securitised assets, equities, short positions and issued bonds . In cases where quotations cannot be observed, management best estimates what the market would price using its own internal models . In most cases, these internal models use data based on observable market parameters as significant inputs (level 2 ) and sometimes use significant unobservable inputs in market data (level 3 ) . Various techniques are used to estimate it, including extrapolating observable market data . As a result, the most reliable evidence of the fair value of a financial instrument on initial recognition is the transaction price unless the value of that instrument can be derived from other market transactions by the same or a similar instrument or valued using a valuation technique in which the inputs used include only observable market data, mainly interest rates . The main techniques used as of March 31 , 2023 , and 2022 and December 2022 2 by the Bank's internal models to determine the fair value of financial instruments are described below : i. The present method is used in the valuation of financial instruments permitting static hedging (mainly forwards and swaps) . Estimated future cash flows are discounted using the interest rate curves of the related currencies . The interest rate curves are generally observable market data . ii. For the valuation of financial instruments requiring dynamic hedging (mainly structured options and other structured instruments the model normally used is the Black - Scholes model . Where appropriate, observable market inputs re used to obtain the bid - offer spread, exchange rates, volatility, correlation indexes and market liquidity . iii. For the valuation of certain financial instruments exposed to interest rate risks, such as interest rate futures, caps and floors, the present (future) value method and the Black - Scholes model (plain vanilla options) are used . The main inputs used in these models are observable market data, including the related interest rate curves, volatilities, correlations and exchange rates . The fair value of the financial instruments calculated by the aforementioned internal models considers contractual terms and observable market data, including interest rates, credit risk, exchange rates, the quoted market price of shares and market rates of raw materials, volatility, prepayments and liquidity . In addition, the Bank's management verifies that the valuation models do not incorporate significant subjectivity, as these methodologies can be adjusted and calibrated through internal calculations of fair value and subsequent comparison with the corresponding actively traded price . In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 23

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31 , 2023 , and 2022 , and December 31 , 2022 NOTE 02 - BREAKDOWN OF SIGNIFICANT ACCOUNTING CRITERIA, continued The Bank has developed a formal process for the systematic valuation and management of financial instruments, implemented in all units included in the scope of consolidation . The governance structure of this process distributes responsibilities between two separate divisions : Treasury (responsible for the development, marketing and daily management of financial products and market data) and Market Risks (responsible for the periodic validation of valuation models and market data, the process of calculating risk metrics, policies for approving new transactions, market risk management and the implementation of valuation adjustment policies) . Approving a new product involves several steps (application, development, validation, integration into corporate systems and quality review) before production . This process ensures the rating systems are properly reviewed and stable before use . Details of the most significant derivative products and families, together with their respective valuation techniques and inputs, by type of asset, are set out under Note 44 'Fair value of financial assets and liabilities' in the present Interim Consolidated Financial Statements . k. Fixed assets This category includes the number of buildings, land, furniture, vehicles, computer hardware and other fixed assets owned by the consolidated entities or acquired under finance leases . Assets are classified according to their use as follows : i. Fixed assets (property, plant and equipment) for own use Fixed assets (Property, plant, and equipment) for own use include but are not limited to tangible assets received by the consolidated entities in full or partial satisfaction of financial assets representing accounts receivable from third parties intended to be held for continuing own use, and tangible assets acquired under finance leases . Accordingly, these assets are presented at the acquisition cost to which the related accumulated depreciation is subtracted along with, if applicable, any impairment loss resulting from comparing the net value of each item to the respective recoverable amount . Depreciation is calculated using the straight - line method over the acquisition cost of assets minus their residual value, assuming that the land on which buildings and other structures stand has an indefinite life and is not subject to depreciation . The Bank applies the following useful lives for the tangible assets that comprise its assets : In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 24 At each reporting period, the consolidated entities assess whether there is any indicator that the carrying amount of any tangible asset exceeds its recoverable amount . If this is the case, the asset's carrying amount is reduced to its recoverable amount . Future depreciation charges are adjusted under the revised carrying amount and to the new remaining useful life . Useful Life (Months) ITEM - Land - Paintings and works of art 36 Carpets and curtains 36 Computers and Hardware 36 Vehicles 60 ATMs and teleconsultations 60 Other machines and equipment 60 Office furniture 60 Telephone and communication systems 60 Security systems 60 Rights over telephone lines 84 Air conditioning systems 120 Other installations 1,200 Buildings

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31 , 2023 , and 2022 , and December 31 , 2022 NOTE 02 - BREAKDOWN OF SIGNIFICANT ACCOUNTING CRITERIA, continued Likewise, the estimated useful lives of the items of property, plant and equipment held for own use are reviewed at the end of each reporting period to detect significant changes . If changes are detected, the useful lives of the assets are adjusted by correcting the depreciation charge to be recorded in the Interim Consolidated Statement of Income in future years based on the new useful lives . Maintenance expenses relating to tangible assets held for own use are recorded as an expense in the period in which they are incurred . ii. Assets leased out under operating leases The criteria used to record the acquisition cost of assets leased out under operating leases, to calculate their depreciation and their respective estimated useful lives, and to record their impairment loss, are the same criteria as those for property, plant and equipment held for own use . l. Leases At the contract's creation, the Bank assesses whether it contains a lease . A contract contains a lease if the contract conveys the right to control the use of an identified asset for a period of time in exchange for compensation . To assess whether a contract conveys the right to control the use of an identified asset, the Bank assesses whether : The contract involves using an identified asset. This may be specified explicitly or implicitly and should be physically distinct. The asset is not identified if the supplier has a significant substitution right. The Bank has the right to obtain all the economic benefits from using the asset throughout the contract's duration. The Bank has the right to direct the use of the asset – this is the decision - making purpose for which the asset is used. a. As a lessee The Bank recognises a right - of - use asset and a lease liability at the starting date of the lease according to the IFRS 16 'Leases' . The Bank's main contracts are with its related offices and branches necessary to undertake its activities . In the beginning, the right - of - use asset is equal to the lease liability . It is calculated as the present value of the lease payments, which are discounted using the Bank's incremental interest rate at the starting date and considering each contract's duration . The average incremental interest rate is 1 . 61 % . Subsequently, the asset is straight - line depreciated according to the contract's duration, and the financial liability is amortised in terms of the monthly payments . The financial interest is charged to net interest income, and the depreciation is charged to the depreciation expense of each financial year . The lease's term encompasses non - cancellable periods stipulated within each contract . In the case of a lease contract with indefinite duration, the Bank has determined to assign a span equal to the longest of the non - cancellable period of its lease contracts . Contracts with a non - cancellable period of 12 months or less are treated as short - term leases . Therefore, the related payments are recorded as straight - line expenses . Any change in the lease term or rent is treated as a new measurement of the lease . In the initial measurement, the Bank measures the right - of - use asset at cost . The rent of the lease contracts is agreed in UF and payable in Chilean pesos . According to Circular No 3649 of the FMC, the monthly UF variation that affects all contracts established in such monetary units should be treated as a new measurement . Therefore, readjustments should be recognised as an amendment to the obligation, and in parallel, the amount of the related asset should be adjusted . The Bank has not entered into lease agreements with guarantee clauses for residual value or variable lease payments . b. As a lessor In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 25

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and December 31, 2022 NOTE 02 - BREAKDOWN OF SIGNIFICANT ACCOUNTING CRITERIA, continued When the Bank acts as a lessor, it first determines if the process corresponds to a financial or operating lease . To do this, the Bank evaluates whether it has substantially transferred all the risks and benefits of the asset . In the affirmative case, it corresponds to a financial lease . Otherwise, it is an operating lease . The Bank recognises lease rentals received on a straight - line income basis over the lease term. c. Third - party financing The sum of present values of the lease payments receivable from the lessee are recognised as loans with third parties under 'loans and accounts receivable from customers' in the Interim Consolidated Statements of Financial Position . This includes the price of the lessee's right - to - call option by the end of the lease term when it is reasonably certain that the lessee will exercise said right . The financial income and expense derived from these contracts are recorded in the Interim Consolidated Income Statements under 'Interest income' and 'Interest expense', respectively, to achieve a constant return rate over the lease term . Factoring transactions Factored receivables are valued at the amount disbursed by the Bank in exchange for invoices or other commercial instruments representing the credit the transferor assigns to the Bank . The price difference between the amounts disbursed and the actual face value of the credits is recorded as interest income in the Interim Consolidated Statement of Income using the effective interest method over the financing period . When the assignment of these instruments involves no liability on the part of the assignee, the Bank assumes the risks of insolvency of the parties responsible for payment . m. Intangible assets Intangible assets are non - monetary assets (identifiable separately from other assets) without physical substance arising from legal or contractual rights . The Bank recognises an intangible asset, whether purchased or self - created (at cost) when the asset's cost can be measured reliably, and the future economic benefits attributable to the asset are expected to flow into the Bank . To calculate intangible assets, they are recorded initially at their acquisition or production cost, from which the accumulated amortisation and accumulated impairment loss are subtracted . Internally developed computer software is recorded as an intangible asset if, among other requirements (primarily the Bank's ability to use or sell it), it can be identified, and its ability to generate future economic benefits can be demonstrated . Intangible assets are amortised linearly based on their estimated useful life, which has been defined by default at 36 months and can be modified if the extent to which the Bank will benefit from its use for a different period than the mentioned above is demonstrated . Expenditure on research activities is recorded as the expense incurred in the year and cannot be subsequently capitalised. n. Non - current assets held for sale Non - current assets held for sale and discontinued operations Per the IFRS 5 , 'Non - current assets held for sale and discontinued operations', a non - current asset is classified as held for sale if its carrying amount will be recovered mainly through a sale transaction rather than through continued use . The asset must meet the following requirements to apply the above classification: - It must be available in its current conditions for immediate sale, and selling must be highly probable. In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 26

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and December 31, 2022 NOTE 02 - BREAKDOWN OF SIGNIFICANT ACCOUNTING CRITERIA, continued - For it to be highly probable, the appropriate management level must be engaged in a plan to sell the asset (or group of assets for its disposal) . Also, a program to find a buyer and the completion of said purchase must have been actively initiated . - Furthermore, the sale should be expected to qualify for recognition as a completed sale within one year of the classification date . Assets classified as such shall be measured at the lower carrying amount or fair value with fewer selling costs. Assets received or awarded in lieu of payment All assets received or awarded as loan payments and accounts receivable from clients are recorded – in the case of dation in payment – at a price agreed between the parties or, conversely, in those cases in which there is no agreement between the parties, at the amount at which the Bank is awarded such assets in a judicial auction . In both cases, an independent assessment of the market value of the goods is determined based on the state in which they are acquired . If there is an excess of loan receivables over the fair value of the goods received or foreclosed in payment when the selling cost is subtracted, they are recognised in the Interim Consolidated Income Statements under 'Provision for credit risk' . These goods are subsequently valued at the lower amount between the initially recorded figure and the net realisable value, which corresponds to their fair value (liquidation value determined through an independent appraisal) minus their respective costs of sale . The differences between the two are recognised in the Interim Consolidated Income Statements under 'Other operating expenses' . At the end of each year, the Bank conducts an analysis to review the cost of sale of assets received or foreclosed in payment, which is then applied from that date onwards and into the following year . In December 2022 , the average cost was estimated at 5 . 8 % of the appraised value ( 4 . 0 % as of December 31 , 2021 ) . In addition, a review of the appraisals (independent) is carried out every 18 months to adjust the fair value of the assets . These assets are generally estimated to be disposed of within one year from the award date . Under article 84 of the General Banking Law, assets not sold within this period are penalised through a single instalment . On March 25 , 2021 , the FMC issued Circular No 2247 granting an additional 18 months for the disposal of all assets that financial institutions have received in payment or are awarded between March 1 , 2019 , and December 31 , 2021 , also allowing these assets' write - off to be made in instalments proportional to the number of months between the date of their receipt and that set by the Bank for their disposal . o. Income and expense recognition The most important criteria used by the Bank to recognise its revenues and expenses are summarised as follows: i. Interest revenue, interest expense, and similar items Interest income, interest expense and similar items are recognised on an accrual basis using the effective interest rate method . Nevertheless, the Bank ceases to recognise income on an accrual basis when a loan or one of its instalments is 90 days overdue . This means that interest, adjustments or commissions are not recognised in the Interim Consolidated Income Statement unless received . These interest and readjustments are generally referred to as 'suspended' and are recorded in memorandum accounts, which do not form part of the Interim Consolidated Statements of Financial Position but are reported as part of the supplementary information therein (Note 30 and 31 ) . Interest incomes of previous 'transactions with suspended accrual' are only recognised again when the debtor is up to date with its obligations . In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 27

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and December 31, 2022 NOTE 02 - BREAKDOWN OF SIGNIFICANT ACCOUNTING CRITERIA, continued ii. Commissions, fees and similar items Fee and commission income and expenses are recognised in the Interim Consolidated Income Statements using the criteria set out in IFRS 15 , 'Revenue from contracts with customers' . Under IFRS 15 , 'Revenue from contracts with customers', the Bank recognises revenue when it satisfies its performance obligations by transferring the service (an asset) to the customer . Under this definition, an asset is transferred when the customer obtains control over the asset . The Bank considers the contractual terms and its traditional business practices for determining the transfer price . The transfer price is the amount of compensation the entity expects to be entitled in order to transfer committed goods and services to the customer, excluding amounts collected on behalf of third parties . The Bank consistently applies the recognition method for each performance obligation, whether it satisfies the performance obligation over time or satisfies the performance obligation at a specific point in time . The main income arising from commissions, fees, and similar items are: Credit prepayment fees, which include fees related to customer prepayments of credit operations. Fees and commissions on loans with letters of credit, which comprise fees and commissions related to granting loans with letters of credit. Credit line and overdraft fees, which refer to fees accrued during the year to grant credit lines and current account overdrafts. Fees for guarantees and letters of credit, which include fees accrued during the year to grant payment guarantees for real or contingent third - party obligations. Card service fees. These refer to fees earned and accrued for the year related to credit, debit and other cards. Account administration fees. These comprise fees incurred to maintain current, savings and other accounts. Fees and commissions for collections and payments, which include fees and commission income generated by the Bank's collections and payment services. Commissions for brokerage and handling securities, which refer to income from commissions generated on brokerage, placements, administration, and custody of securities. Remuneration for the administration of mutual funds, investment funds or others, which comprises commissions from fund management companies separated by type of client (natural or legal person). Insurance intermediation and consultancy fees, which include income generated through insurance sales, separated by the type of insurance brokered. Fees for financial leasing transaction services, which refers to those financial leasing services in which the Bank acts as a lessor. Securitisation fees, which include fees for securitisation services. Fees for financial advisory services, which comprise those involved in advisory services concerning the issuance and placement of financial instruments, restructuring and funding financial liabilities, sale and purchase of companies, and others. Other commissions earned, which include income generated by currency exchanges, issuing demand vouchers and guarantee slips, trust commissions, foreign trade operations, student loan administration, and other services. Commission expenses comprise: Card transaction fees, which involve commissions generated by credit cards, debit cards and the provision of funds related to the income generated from card service fees. Card brand licence fees. These are fees paid to the main card brands: credit, debit and provision of funds. Other fees for services linked to the credit card system and cards with the provision of funds. In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 28

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and December 31, 2022 NOTE 02 - BREAKDOWN OF SIGNIFICANT ACCOUNTING CRITERIA, continued Expenses for loyalty and merit programme obligations for card customers. They refer to expenses related to customer benefit programmes related to the use of cards. Fees for securities transactions. They comprise fees for deposit, safekeeping and brokerage of securities, investments in mutual funds, stock exchanges, central counterparty and market infrastructure services. Other fees for services received. They include securities services, foreign trade, correspondent banking, ATMs and wire transfer fees. Fees for clearing high - value payments, which include fees to ComBanc, CCLV, etc. The relationship between the segment note and the disaggregated income is presented in Note 32 Commissions. The Bank maintains loyalty programmes linked to its credit card services, which under IFRS 15 'Revenue from contracts with customers', have the necessary provisions to meet the delivery of committed performance obligations to come. Such obligations are settled immediately upon incurrence. iii. Non - financial income and expenses They are recognised under the criteria established in IFRS 15, 'Revenue from contracts with customers', identifying the performance obligation and when they are satisfied (accrued). iv. Commissions in the formalisation of loans Financial fees and commissions arising on the origination of loans, mainly origination or arrangement fees and information fees, are accrued and recognised in the Interim Consolidated Statements of Income over the life of the loan. p. Provisions for credit risk on loans and receivables and contingent liabilities The Bank permanently evaluates the entire portfolio of loans and contingent credits, as established by the FMC, to promptly create sufficient provisions to cover the expected loss linked with the debtors' characteristics and credits based on payment and subsequent recovery . The Bank uses the following models established by the FMC and approved by the Board of Directors to assess its loan and contingent loan portfolio : Individual assessment of debtors – This applies to debtors recognised as individually significant, that is, with substantial levels of debt, and to those who, even if not significant, are not able to be classified in a group of financial assets with similar credit risk characteristics, and which, due to their size, complexity or level of exposure, require detailed analysis . Group assessment of obligors - Group assessments are relevant for residential mortgage and consumer credit exposures, in addition to commercial student credit exposures and exposures to obligors that simultaneously meet the following conditions : i. The Bank has an aggregate exposure to the same counterparty of less than UF 20 , 000 . The aggregate exposure is considered the gross of provisions or other mitigants and includes housing mortgages in its calculation . Concerning off - balance sheet items (contingent claims), the gross amount is calculated by applying the credit translation factors defined in Chapter B - 3 of the Compendium of Accounting Standards for Banks . ii. Each aggregate exposure to a single counterparty does not exceed 0 . 2 % of the total portfolio related to the group - rated loans . Group assessments are suitable for dealing with many transactions with low individual amounts and involving individuals or small companies . The Bank groups debtors with similar credit risk characteristics by associating each group with a certain probability of non - performing and a recovery rate based on a substantiated historical analysis . To this end, the Bank implemented the standard model for mortgage and commercial loans and the internal model for consumer loans . In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 29

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31 , 2023 , and 2022 , and December 31 , 2022 NOTE 02 - BREAKDOWN OF SIGNIFICANT ACCOUNTING CRITERIA, continued I. Allowances for individual assessments The individual assessment of trade debtors is necessary, as established by the FMC, in the case of companies that require detailed knowledge and analysis due to their size, complexity, or level of exposure to the entity . The analysis of debtors focuses firstly on their credit quality . Then, it classifies them in the risk category corresponding to the debtor and their respective credit operations and contingent credits after assigning them to one of the three portfolio statuses : Standard, Substandard and Impaired . The risk factors used in the allocation are the industry or sector, business situation, partners and management, their financial situation and ability to pay, and payment behaviour . The portfolio categories and their definitions are as follows : i. Normal Portfolio includes debtors with a payment ability to meet their obligations and commitments . Evaluations of the current economic and financial environment do not indicate that this will change . The classifications assigned to this portfolio are categories from A 1 to A 6 . ii. Substandard Portfolio includes debtors with financial difficulties or significant deterioration of their payment ability . There is reasonable doubt concerning the future reimbursement of the capital and interest within the contractual terms, with limited ability to meet short - term financial obligations . The classifications assigned to this portfolio are categories from B 1 to B 4 . iii. Impaired Portfolio includes debtors and loans in which repayment is considered remote, with a reduced or no likelihood of repayment . This portfolio includes debtors who have stopped paying their loans or that indicate that they will stop paying, as well as those who require forced debt restructuration, reducing the obligation or delaying the term of the capital or interest and any other debtor who is overdue by 90 days or more in their payment of interest or capital . The classifications assigned to this portfolio are categories from C 1 to C 6 . Normal and Substandard Compliance Portfolio As part of individual assessment, the Bank classifies debtors into the following categories, assigning them a probability of non - performance and severity, which result in the expected loss percentages : In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 30 Expected Loss (%) Severity (%) Probability of Non - Performance (%) Debtor's Category Portfolio 0.03600 90.0 0.04 A1 0.08250 82.5 0.10 A2 0.21875 87.5 0.25 A3 Normal Portfolio 1.75000 87.5 2.00 A4 4.27500 90.0 4.75 A5 9.00000 90.0 10.00 A6 13.87500 92.5 15.00 B1 20.35000 92.5 22.00 B2 Substandard Portfolio 32.17500 97.5 33.00 B3 43.87500 97.5 45.00 B4

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31 , 2023 , and 2022 , and December 31 , 2022 NOTE 02 - BREAKDOWN OF SIGNIFICANT ACCOUNTING CRITERIA, continued The first step to determine the number of provisions is to assess the affected exposure . This comprises the book value of loans plus contingent credits minus the amounts feasible to recover through activating the financial or real guarantees covering the operations . Then, the respective loss percentages are applied to this exposure result . In the case of collateral, the Bank must demonstrate that the value assigned to the deduction reasonably reflects the value realised at the disposal of the assets or equity instruments . If the debtor's credit risk is substituted for the guarantor's credit quality, this methodology will only apply if the guarantor or surety is an entity qualified in a category similar to the investment grade of a local or international rating agency recognised by the FMC . Under no circumstances guaranteed securities may be deducted from the exposure amount . Only financial guarantees and collateral can be considered . Notwithstanding the above, the Bank must maintain a minimum provision of 0 . 5 % over loans and contingent loans in the normal portfolio . Non - performing Portfolio The impaired portfolio includes all loans and 100 % of the value of contingent loans of the debtors overdue by 90 days or more on the payment of interest or principal of any loan at the end of the month . It also includes debtors who have been granted a loan to refinance loans overdue by 60 days or more and debtors who have undergone forced restructuring or partial debt forgiveness . The impaired portfolio excludes : a) residential mortgage loans, with payments overdue less than 90 days ; and b) loans to finance higher education according to Law No 20 , 027 , provided the breach conditions outlined in Circular No 3454 of December 10 , 2008 , are not fulfilled . The provision for an impaired portfolio is calculated by determining the expected loss rate for the exposure, adjusting for amounts recoverable through available financial guarantees and deducting the present value of recoveries made through collection services after the related expenses . Once the expected loss range is determined, the related allowance rate is applied over the exposure amount, including loans and contingent loans related to the debtor . The allowance rates applied over the calculated exposure are as follows : In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 31 Allowance Estimated range of loss Classification 2% Up to 3% C1 10% Between 3% and 20% C2 25% Between 20% and 30% C3 40% Between 30% and 50% C4 65% Between 50% and 80% C5 90% More than 80% C6 All the obligor's loans are maintained in the impaired portfolio until its payment ability is normalised, notwithstanding the charge - off of each particular credit that meets Title II of Chapter B - 2 of the CASB . Once the circumstances that led to classification in the Impaired Portfolio have been overcome, the debtor can be removed from this portfolio once all the following conditions are met : i. The debtor has no obligations overdue with the Bank by 30 days or more. ii. The debtor has not been granted loans to pay its obligations. iii. At least one of the payments includes the amortisation of capital.

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31 , 2023 , and 2022 , and December 31 , 2022 NOTE 02 - BREAKDOWN OF SIGNIFICANT ACCOUNTING CRITERIA, continued iv. If the debtor has made partial loan payments in the last six months, two payments must already be made. v. Four consecutive instalments have been made if the debtor must pay monthly instalments for one or more loans. vi. The debtor does not appear to have bad debts in the information provided by the FMC, except for insignificant amounts. II. Allowances for group assessments Group assessments are relevant for residential mortgage and consumer credit exposures, in addition to commercial student credit exposures and debtor exposures that simultaneously meet the following conditions : i. The Bank has an aggregate exposure (the exposure on the same Business Group at a consolidated level) to the same counterparty of less than UF 20 , 000 . The aggregate exposure is considered the gross of provisions or other mitigants and includes housing mortgages in its calculation . Concerning off - balance sheet items (contingent claims), the gross amount is calculated by applying the credit translation factors defined in Chapter B - 3 of the Compendium of Accounting Standards for Banks . ii. Each aggregate exposure to a single counterparty does not exceed 0 . 2 % of the total portfolio related to the group - rated loans . To determine provisions, group assessments require the creation of groups of loans with homogeneous qualities in terms of the type of debtors and agreed on conditions to establish, using technically sound estimates and prudential criteria, both the payment behaviour of the group and the recoveries of its non - performing loans . This is done using a model based on the characteristics of debtors, payment history, outstanding loans and delinquency, among other relevant factors . The Bank uses credit risk methodologies based on internal and/or standard models to estimate provisions for the group - assessed portfolio, including commercial loans for debtors not individually assessed, housing loans and consumer loans (including instalment loans, credit cards and overdraft facilities) . This methodology helps to independently identify the portfolio's performance one year ahead and determine the provision necessary to cover one year's loss from the balance sheet date . Customers are segmented according to their internal and external characteristics into groups or profiles to differentiate the risk of each portfolio in a more appropriate and orderly manner (customer - portfolio model) ; this is known as the profiling method . The profiling method is based on a statistical construction method, constituting a relationship through a logistic regression between variables such as delinquency, external behaviour, socio - demographic variables, and a response variable that determines the customer's risk . In this case, delinquency is equal to or greater than 90 days . Hence, common profiles are established and assigned a Probability of Non - Performance (PNP) and a recovery rate based on a historical analysis known as Severity (SEV) . Therefore, once the customers have been profiled and the loan's profile assigned a PNP and a SEV, the exposure at default (EXP) is calculated . This exposure includes the book value of the loans and accounts receivable from the customer, plus contingent loans, minus any amount that can be recovered by activating guarantees (for credits other than consumer loans) . Notwithstanding the above, in establishing provisions related to mortgage and commercial loans, the Bank must recognise minimum provisions according to standard methods established by the FMC for those types of loans . While this is considered a conservative minimum base, it does not relieve the Bank of its responsibility to have its own methodologies for determining adequate provisions to protect the portfolio's credit risk . Provisions must be made considering the higher value obtained between the standardised and internal methods . In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 32

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31 , 2023 , and 2022 , and December 31 , 2022 NOTE 02 - BREAKDOWN OF SIGNIFICANT ACCOUNTING CRITERIA, continued Standard method of group portfolio provisioning i. Mortgage portfolio Following the CASB, the Bank applies the standard provisioning method for residential mortgages . Under this method, the expected loss factor applicable to the number of residential mortgage loans will depend on the delinquency of each loan and the ratio, at the end of each month, between the outstanding principal amount of each loan and the value of the mortgage collateral (LTV) that protects it . The relevant provisioning factor according to delinquency and LTV is as follows : Non - performing portfolio 60 - 89 30 - 59 1 - 29 0 Days past due at month - end LTV Range 100 75.1614 46.0536 21.3407 1.0916 PNP (%) 0.0537 0.0482 0.0482 0.0441 0.0225 SEV (%) LTV ≤ 40% 0.0537 0.0362 0.0222 0.0094 0.0002 EXP (%) 100 78.9511 52.0824 27.4332 1.9158 PNP (%) 3.0413 2.9192 2.9192 2.8233 2.1955 SEV (%) 40% < LTV ≤ 80% 3.0413 2.3047 1.5204 0.7745 0.0421 EXP (%) 100 79.6952 52.5800 27.9300 2.5150 PNP (%) 22.2310 22.1331 21.9200 21.6600 21.5527 SEV (%) 80% < LTV ≤ 90% 22.2310 17.6390 11.5255 6.0496 0.5421 EXP (%) 100 80.3677 53.0800 28.4300 2.7400 PNP (%) 30.2436 30.1558 29.5900 29.0300 27.2000 SEV (%) LTV > 90% 30.2436 24.2355 15.7064 8.2532 0.7453 EXP (%) LTV= (Loan - to - Value Ratio) unpaid loan principal/value of the mortgage collateral. This standardised approach will also be applied to residential leasing transactions, following the same criteria described above and considering the leased asset value equivalent to the amount of the mortgage collateral . If the same debtor holds more than one residential mortgage loan with the Bank and one is overdue by 90 days or more, all the loans will be assigned to the non - performing portfolio, with provisions calculated for each according to their respective LTV percentages . In the case of housing mortgage loans linked to housing and subsidy programmes of the State of Chile, provided that they are contractually covered by the auction insurance supplied by the latter, the provisioning percentage may be weighted by the loss mitigation (LM) factor, which depends on the LTV percentage and the value of the house in the deed of sale (V) . Therefore, the LM factors to be applied to the corresponding provisioning percentage are presented in the table below : Loss mitigation (LM) factor for loans with state auction insurance Segment V: Deeded house price (UF) LTV Range 1,000< V <= 2,000 V<1,000 100 LTV <= 40% 40% < LTV <= 80% 96 95 80% < LTV <=90% 89 84 LTV > 90% In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 33

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31 , 2023 , and 2022 , and December 31 , 2022 NOTE 02 - BREAKDOWN OF SIGNIFICANT ACCOUNTING CRITERIA, continued ii. Commercial portfolio Following the CASB, the Bank applies the standard model of provisions for commercial loans in the group portfolio, depending on whether it corresponds to commercial leasing, student loans or other commercial loans . Before implementing the standard method, the Bank used internal models to determine group business provisions . a. Commercial leasing operations The provision factor must be applied to the current value of commercial leasing operations (including the call option) for these operations . Therefore, it will depend on the delinquency of each operation, the type of leased asset and the relationship, at the closing of each month, between the current value of each operation and the value of the leased asset (PVB), as indicated in the following tables : In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 34 Probability of Non - Performance (PNP) applicable according to delinquency and type of asset (%) Type of asset Days past due at the end of the month Non - real estate Real estate 1.61 0.79 0 12.02 7.94 1 - 29 40.88 28.76 30 - 59 69.38 58.76 60 - 89 100.00 100.00 Non - performing portfolio Severity (SEV) applicable by PVB range and type of asset (%) Non - real estate Real estate PVB range (*) 18.2 0.05 PVB ≤ 40% 57.00 0.05 40% < PVB ≤ 50% 68.40 5.10 50% < PVB ≤ 80% 75.10 23.20 80% < PVB ≤ 90% 78.90 36.20 PVB > 90% (*) PVB= Current value of operation/leased asset value The PVB ratio will be determined considering the appraisal value, expressed in UF for real estate and Pesos for non - real estate, recorded at the time of granting the respective credit, considering any situations that may be causing pricing rises of the asset at that time . b. Student loans For these operations, the provision factor should be applied to the student loan and the exposure of the contingent credit, when applicable . The determination of this factor depends on the type of student loan and the enforceability of the payment of capital or interest at the end of each month . Where payment is due, the factor will also depend on the delinquency of the payment . For the loan classification, a distinction is made between those granted for financing higher studies under Law No 20 , 027 (CAE) and, on the other hand, the CORFO guarantee credits or other student loans .

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and December 31, 2022 NOTE 02 - BREAKDOWN OF SIGNIFICANT ACCOUNTING CRITERIA, continued Probability of Non - Performance (PNP) according to enforceability, delinquency and type of loan (%) Type of student loan Days past due at the end of the month Presents payment enforceability or interest at the end of the month CORFO and others CAE 2.90 5.20 0 15.00 37.20 1 - 29 43.40 59.00 30 - 59 Yes 71.90 72.80 60 - 89 100.00 100.00 Non - performing portfolio 16.50 41.60 N/A No Probability of Non - Performance (PNP) applicable by PVB range and type of asset (%) Type of student loan Presents payment enforceability or interest at month - end. CORFO and others CAE 70.90 Yes 45.80 50.30 No In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 35 c. Generic commercial loans and factoring For factoring transactions and other commercial loans, the provisioning factor, applicable to the amount of the loan and the contingent credit exposure, will depend on the delinquency of each transaction and the ratio at the end of each month between the debtor's obligations to the Bank and the value of the collateral (PTVG) securing them, as indicated in the following tables : Probability of Non - Performance (PNP) applicable according to delinquency and PTVG range (%) Guaranteed Days past due at month - end Not guarantee PTVG > 100% PTVG ≤ 100% 4.91 2.68 1.86 0 22.93 13.45 11.60 1 - 29 45.30 26.92 25.33 30 - 59 61.63 41.31 41.31 60 - 89 100.00 100.00 100.00 Non - performing portfolio

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and December 31, 2022 NOTE 02 - BREAKDOWN OF SIGNIFICANT ACCOUNTING CRITERIA, continued In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 36 Severity (SEV) applied according to PTVG range (%) Factoring with responsibility Factoring and other commercial loans without responsibility PTVG Range Guarantee (with/without) 3.20 5.00 PTVG ≤ 60% Guaranteed 12.80 20.30 60% < PTVG ≤ 75% 20.30 32.20 75% < PTVG ≤ 90% 27.10 43.00 90% < PTVG 35.90 56.90 Not guarantee The guarantees used to calculate the PTVG ratio of this method may be of a specific or general nature . However, a guarantee can only be considered if, according to the respective coverage clauses, it was set in the first degree of preference in favour of the Bank and only guarantees the debtor's credits concerning which it is attributed (not shared with other debtors) . The invoices assigned in the factoring operations, or the guarantees linked to mortgage loans, regardless of their coverage clauses, will not be considered in the calculation . The following considerations must be taken into account when calculating the PTVG ratio : i. Transactions with specific guarantees : those in which the debtor provided specific guarantees for generic commercial loans and factoring . The PTVG ratio is calculated separately for each secured transaction as the division between the loan amount and the contingent credit exposure over the value of the collateral securing it . ii. Transactions with general guarantees : when the debtor is granted general or general and specific guarantees, the Bank calculates the corresponding PTVG jointly for all generic commercial loans, factoring and operations not contemplated in the above paragraph i), as the division between the sum of the amounts of loans and contingent credit exposures over the general or specific guarantees that, according to the scope of the remaining hedge clauses, protect the credits considered in the numerator of the aforementioned ratio . The amounts of collateral used in the PTVG ratio in (i) and (ii) should be determined according to the : - The guarantee's last valuation, whether through its appraisal or fair value, according to the type of guarantee. The criteria in Chapters 7 - 12 of the Updated Collection of Standards should be considered to determine fair value. - Possible situations that could be causing temporary increases in the values of the guarantees. - Limitations on the amount of coverage established in their respective clauses. III. Provisions for contingent credits Contingent credits are transactions or commitments in which the Bank assumes a credit risk and, at the possibility of a future event, the obligation vis - à - vis third parties to make a payment or disbursement to be recovered from its customers . To calculate the provisions as indicated in Chapter B - 1 of the CASB, the amount of exposure to be considered shall be equal to the percentage of the contingent claim amounts indicated below :

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and December 31, 2022 NOTE 02 - BREAKDOWN OF SIGNIFICANT ACCOUNTING CRITERIA, continued In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 37 Credit Translation Factors (FCC) Type of loan 10% Immediately repayable unrestricted credit lines 15% Contingent credits linked to CAE 20% Letters of credit for goods movement operations 40% Other unrestricted credit lines 50% Debt purchase commitments in local currencies abroad 50% Transactions related to contingent events 100% Guarantees and sureties 100% Other credit commitments 100% Other contingent credits In the case of transactions with clients with non - performing loans, such exposure shall always equal 100 % of their contingent credits . IV. Guarantees and credit enhancements Guarantees are only considered in calculating provisions when they are legally established and when the conditions allowing their eventual activation or settlement in the Bank's favour are met . Collateral valuation (mortgages or pledges) reflects the net cash flow obtained from selling goods or equity instruments, or from capital minus estimated expenses in the event of a debtor's non - performance . For mortgages and pledges on goods, the Bank undertakes analyses highlighting the relationship between the prices obtained in an eventual settlement and their appraisal or foreclosure values . Nevertheless, the valuations of mortgages and other goods received are based on valuations carried out by independent professionals, while maintenance and transaction costs are based on historical data from at least three years prior . The Bank has the necessary collateral revaluation policies in place . Financial guarantees, measured through fair value adjustments, may only be deducted from credit risk exposures when provided to secure the performance of the credits concerned . The adjusted fair value is obtained by applying the interest rate and currency volatility discount factors established by the FMC and subtracting settlement costs . Determining provisions in the case of leased assets considers the value obtained on the disposal of the leased assets, considering the impairment that these may present, and the expenses related to their redemption and liquidation or eventual relocation . Determining provisions for factoring loans considers that the counterparty is the assignor of the documents endorsed to the Bank when the factoring is with liability and the debtor when the assignment is without liability of the assignor . V. Additional provisions According to FMC regulation, banks can establish provisions over the already described limits to protect themselves from the risk of non - predictable economic fluctuations that could affect the macroeconomic environment or a specific economic sector . As set out in number 9 of Chapter B - 1 of the CASB of the FMC, these provisions shall be reported on the liability side in the same way as provisions on contingent claims .

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31 , 2023 , and 2022 , and December 31 , 2022 NOTE 02 - BREAKDOWN OF SIGNIFICANT ACCOUNTING CRITERIA, continued VI. Provisions related to financing with FOGAPE guarantee Covid - 19 The FMC requested the determination of specific provisions for loans secured by the FOGAPE Covid - 19 guarantee, for which the expected loss must be determined . This is done by estimating the risk of each transaction, dismissing the guarantor's credit quality substitution, and following the appropriate individual or group analysis method per the clauses of the CASB Chapter B - 1 . This calculation must be made on an aggregate basis, grouping all transactions to which the same deductible percentage is applicable . Hence, the total expected loss resulting from the aggregate calculation of each transaction group must be compared with the total deductible corresponding to them . When the expected loss of the transactions of a group with the same deductible percentage is determined to be equal to or less than the aggregate deductible, the provisions are set without considering the FOGAPE Covid - 19 hedge, that is, without replacing the creditworthiness of the direct debtor for that of the guarantor . When they surpass the aggregate deductible, the provisions shall be determined using the substitution method set out in the CASB paragraph 4 . 1 (a) of Chapter B - 1 and shall be recognised in accounts separate from commercial, consumer and housing provisions. VII. Impaired receivables and suspension of accrual The impaired portfolio, in the case of individual assessments, comprises loans classified in the 'non - performing portfolio' plus categories B 3 and B 4 of the 'substandard portfolio' . For group assessment, it comprises loans in the 'non - performing portfolio' . The Bank ceases to recognise income on an accrual basis in the Interim Consolidated Statement of Income when the loan or one of its instalments is 90 days overdue . From the date interest is suspended until they are no longer impaired, loans shall not be credited with interest, adjustments or fees in the Interim Consolidated Statement of Financial Position . No income from such loans shall be recognised unless duly received in the Interim Consolidated Statement of Income . VIII. Charge - offs As a general rule, charge - offs should be applied when the contractual rights to the cash flows expire. The charge - offs in question refer to the derecognition in the Interim Consolidated Statement of Financial Position of the assets corresponding to the respective transaction, including that part which may not be overdue in the case of a loan payable in instalments or a leasing transaction (there are no partial charge - offs) . This includes overdue, past - due and current instalments, with the term corresponding to the time elapsed since the date on which payment of all or part of the obligation is in delinquency . Charge - offs are always booked against the credit risk provisions set up under Chapter B - 1 of the CASB, regardless of the reason for the charge - off . Charge - offs should be carried out in the following circumstances, whichever occurs first: a. Based on all available information, the Bank concludes that it will not obtain flows from the loans recorded on the asset. b. When an unencumbered claim is 90 days old since it was registered as an asset. c. Upon expiry of the statute of limitations for actions to claim collection through an enforceable judgment or at the time of the rejection or abandonment of the enforcement of the title by an enforceable court decision. d. When the period of arrears of a transaction reaches the time limit for charge - offs set out below: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 38

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and December 31, 2022 NOTE 02 - BREAKDOWN OF SIGNIFICANT ACCOUNTING CRITERIA, continued In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 39 Term Type of loan 6 months Consumer loans with or without collateral 24 months Other transactions without collateral 36 months Commercial loans with collateral 48 months Mortgage loans 6 months Consumer leasing 12 months Other non - mortgage leasing transactions 36 months Mortgage leasing (household and business) IX. Recovery of loans previously charged off and accounts receivable from customers Subsequent payments on charge - off transactions shall be recognised in profit or loss as recoveries of impaired loan receivables . When there are recoveries in terms of goods, the income is recognised as the amount by which they are incorporated into the asset under the provisions of the Chapter on Goods and received or awarded in payment of obligations . The same approach is followed if the leased goods are recovered after a leased transaction is charged off when such goods are returned to the asset . q. Impairment of financial assets other than loans and receivables and contingent liabilities The Bank applies IFRS 9 'Financial Instruments' to determine the impairment of financial assets measured at fair value through other comprehensive income and financial assets at the amortised cost other than loans and contingent receivables . The expected credit loss is generally estimated as the difference between all contractual cash flows recovered under the contract . All cash flows expected to be received are discounted at the effective interest rate originated . This model uses a dual measurement approach in which the impairment provision is measured as follows : Credit loss expected at 12 months: it represents expected credit losses arising from default events on a financial instrument that may arise within 12 months from the reporting date. Lifetime expected credit loss: it represents the expected credit losses arising from default events over the expected life of a financial instrument. At each reporting date, an entity must measure the provision at an amount equal to the 'lifetime expected credit loss' if the credit risk on that financial instrument has increased significantly since initial recognition . Otherwise, if the credit risk of a financial instrument has not increased significantly at the reporting date since initial recognition, an entity shall measure the loss allowance for that financial instrument at an amount equal to 'expected credit loss over the next 12 months' . When making such an assessment, an entity compares the default risk of a financial instrument at the reporting date with that of its initial recognition as well as considering reasonable and tenable information made available without unnecessary cost or effort, indicating the growth of credit risk since its initial recognition (on a group or individual basis) . Based on changes in credit quality, IFRS 9 describes a 'three - step' impairment model according to the following diagram :

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and December 31, 2022 NOTE 02 - BREAKDOWN OF SIGNIFICANT ACCOUNTING CRITERIA, continued In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 40 Change in credit quality since initial recognition Phase 3 Phase 2 Phase 1 Credit - impaired assets Significant increase in credit risk since initial recognition Initial recognition Lifetime credit loss Lifetime credit loss Credit loss expected in 12 months Reasonable and tenable information refers to information readily available at the reporting date without unreasonable cost or effort, including information about past events, current conditions and forecasts of future economic conditions . When contractual payments are overdue by 30 days or more, the Bank considers that the credit risk of a financial asset has increased significantly, but this is not the only indicator . Measurement of expected credit loss Expected credit loss estimates the weighted probability of credit losses over the financial instrument's expected life, that is, the present value of all cash shortfalls . The three components of the measurement of expected credit loss are : PD : The probability of default estimates the probability of non - performance over a given time frame . LGD : Loss - given default is an estimate accounting for the loss that could occur in the event of a default at a given time . EAD : Exposure at default is an estimate of the exposure at a future date of non - performance, considering expected exposure changes after the reporting date, including repayments of principal and interest, whether contractually scheduled or otherwise, and interest on defaults . Collateral and other credit enhancements are considered to measure expected credit loss . The Bank considers that if contractual payments are overdue by 30 days or more, the credit risk has increased significantly since the initial credit recognition, but this is not an absolute indicator . Recognition of expected credit loss An entity shall recognise in its financial results a gain or loss caused by value impairment as the amount of the expected credit loss (or reversals) by which the value is adjusted given the losses that have occurred by the reporting date to capture the amount that requires recognition accurately . For assets measured at fair value through other comprehensive income, the book value of the instruments is understood as the fair value . Therefore, the recognition of impairment does not affect the carrying amount of such instruments and is reflected as a movement between other comprehensive income (a deduction from fair value) and the Interim Consolidated Statements of Income at each reporting date . In the case of assets measured at amortised cost, impairment is presented through a supplementary account that reduces the asset's value . r. Impairment of non - financial assets The Bank's non - financial assets are reviewed at each reporting date of the Interim Consolidated Financial Statements for indications of impairment (i . e . , when the carrying amount exceeds the recoverable amount) . If such indications exist, the asset's recoverable amount is estimated to determine the extent of the impairment loss . The recoverable amount is the higher of fair values minus disposal costs and value in use . In assessing value in use, estimates of cash inflows or outflows shall be discounted to present value using the pre - tax discount rate that reflects the current market assessment of the time value of money and the specific risks for which estimates of future cash flows have not been adjusted .

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31 , 2023 , and 2022 , and December 31 , 2022 NOTE 02 - BREAKDOWN OF SIGNIFICANT ACCOUNTING CRITERIA, continued If the recoverable amount of an asset is estimated to be lower than its carrying amount, it is written down as its recoverable amount . The impairment loss is immediately recognised as profit or loss in the period's results . Concerning other assets, impairment loss recognised in prior periods is assessed at each reporting date for any indication that the loss has decreased and should be reversed . The increased carrying amount of an asset, other than goodwill attributable to a reversal of an impairment loss, shall not exceed the carrying amount that would have been determined (net of amortisation or depreciation) had no impairment loss been recognised for the asset in prior years . Loss for goodwill impairment recognised through capital gains is not reversed . s. Provisions, contingent assets and liabilities Provisions are liabilities whose amount or maturity is uncertain . These provisions are recognised in the Interim Consolidated Statements of Financial Position when all the following requirements are met : i. It is a present obligation (legal or constructive) as a result of past events and, ii. It is likely that as of the publication date of the financial statements, the Bank will have to expend resources to settle the obligation and; iii. the amount of these resources can be reliably measured. Contingent assets or contingent liabilities encompass all potential rights or obligations arising from past events . These are only confirmed if one or more uncertain future occurrences are not within the Bank's control . The Interim Consolidated Financial Statements reflect all significant provisions for which the probability of meeting the obligation is estimated to be more likely than not . Provisions are quantified using the best available information regarding the consequences of the event giving rise to them and are reviewed and adjusted at the end of the accounting period . Provisions are used when the liabilities for which they were originally recognised are settled . Partial or total reversals are recognised when such liabilities cease to exist or are reduced . Provisions are classified according to the obligation covered as follows : - Provisions for employee benefit obligations - Provisions for lawsuits and litigations - Provisions for operational risk - Provisions for mandatory dividends - Provisions for contingent loan risks - Provisions for contingencies t. Income tax and deferred taxes The Bank recognises, where appropriate, deferred tax assets and liabilities for the estimated future tax effects attributable to differences between the carrying amounts of assets, liabilities and their tax bases . Deferred tax assets and liabilities are calculated using the tax rate applied in the year the deferred tax assets and liabilities are realised or settled according to current tax legislation . The future effects of tax legislation or tax rate changes are recognised in deferred taxes from when the law approving such changes is published . Current tax assets relate to provisional payments in excess of the provision for income tax or other income tax credits, such as training expenses or donations to universities . In addition, the monthly provision payments to be recovered for profits absorbed by tax losses should be included . In the case of liabilities, they correspond to the provision for income tax calculated based on the tax results for the period, minus the mandatory or voluntary provisional payments and other credits applied to this obligation . In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 41

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and December 31, 2022 NOTE 02 - BREAKDOWN OF SIGNIFICANT ACCOUNTING CRITERIA, continued For its presentation in the Interim Consolidated Statements of Financial Position, under IAS 12 , the tax items should be cleared at the taxing entity's level as deemed appropriate to subsequently add the net balances per taxing entity on a consolidated level . u. Employee benefits v. Post - employment benefits – Defined Benefit Plan: According to the current collective labour covenant and other agreements, Banco Santander - Chile makes available an additional benefit for its main executives consisting of a pension plan, aiming for them to have the necessary funds for a supplementary pension upon retirement . Features of the Plan: The main features of the Post - Employment Benefits Plan promoted by the Banco Santander - Chile are: i. Aimed at the Bank's management . ii. The general requirement is that the beneficiary must still hold their position within the Bank by the time they turn 60 years old . iii. The Bank will contract a mixed collective insurance policy (life and savings) for each executive, with the contracting party and beneficiary being the Group company to which the executive belongs . Periodic contributions will be made equal to the amount each manager commits to their voluntary contribution plan . iv. The Bank will be responsible for granting the benefits directly . The projected unit credit method is used to calculate the present value of the defined benefit obligation and the current service cost . The components of the cost of the defined benefit include : - Current and past service costs are recognised in profit or loss for the period. - Net interest over the net defined benefit liability (asset), recognised in profit or loss for the period. - New net defined benefit liability (asset) measurements include: (a) actuarial gains and losses; (b) the performance of the plan's assets, and (c) changes in the effect of the asset ceiling, which are recognised in other comprehensive income. The net defined benefit liability is the deficit or surplus, calculated as the difference between the present value of the defined benefit’s obligation minus the plan assets' fair value. The plan assets comprise the pension fund procured by the Bank through an unrelated third party . These assets are held by an entity legally separated from the Bank and exist solely to pay employees their benefits . The Bank recognises the present service cost and the net interest in the 'Personnel wages and expenses' on the Interim Consolidated Statement of Income . The plan's structure does not generate actuarial gains or losses . The plan's performance is established and fixed during the period ; consequently, there are no changes to the asset's ceiling . Accordingly, there are no amounts recognised in other comprehensive income . The post - employment benefits liability, recognised in the Interim Consolidated Statement of Financial Position, represents the deficit or surplus in the defined benefit plans of the Bank . Any surplus resulting from the calculation is limited to the present value of any economic benefits available regarding the plan's reimbursements or reductions to future contributions . When employees abandon the plan before meeting the requirements to become eligible for the benefit, the Bank's contributions decrease . In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 42

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31 , 2023 , and 2022 , and December 31 , 2022 NOTE 02 - BREAKDOWN OF SIGNIFICANT ACCOUNTING CRITERIA, continued ii. Severance package: Severance packages by years of employment are recorded only when they occur or upon the availability of a formal and detailed plan in which the fundamental modifications to be made are identified, provided that such plan has already started to be implemented or its principal features have been publicly announced, or objective facts about its activation are known . iii. Cash - settled share - based payments: The Bank allocates cash - settled share - based payments to executives of the Bank and its Subsidiaries under IFRS 2 . Accordingly, the Bank measures the services received and the obligation incurred at fair value . Until the obligation is settled, the Bank calculates the fair value at the end of each reporting period and at the date of settlement, recognising any change to fair value in the income statement for the period . v. Use of Estimates Preparing the Interim Consolidated Financial Statements requires the Bank's Management to make estimates and assumptions that affect applying the accounting policies and the reported values of assets, liabilities, revenues and expenses . Accordingly, actual results may differ from these estimates . In certain cases, the International Financial Reporting Standards (IFRS) require that assets or liabilities be recorded or disclosed at their fair value . The fair value is the price received to sell an asset or paid to transfer a liability in an orderly transaction between informed market participants at the measurement date . When available, quoted market prices in active markets have been used for measurement . When the trade prices of an active market are not available, the Bank estimates such values based on the best information available, including internal modelling and other valuation techniques . The Bank has established provisions to cover potential credit loss per the regulations issued by the FMC . These allowances must be regularly reviewed, considering factors such as changes in the nature and volume of the loan portfolio, trends in forecasted portfolio quality, credit quality, and economic conditions that may adversely affect the borrowers' ability to pay . Increases in the allowances for loan loss are reflected as 'Provisions for loan loss' in the Interim Consolidated Statement of Income . Loans are charged off when the contractual rights for the cash flows expire . Nevertheless, for loans and accounts receivable from customers, the Bank will charge off per Title II of Chapter B - 2 of the Compendium of Accounting Standards issued by the FMC . Charge - offs are recorded as a reduction of credit risk provisions . The Bank's Management regularly reviews the relevant estimates and assumptions used to calculate provisions quantifying certain assets, liabilities, revenues, expenses, and commitments . Revised accounting estimates are recorded in the period the estimate is revised and in any affected future period . These estimates are based on the best available information and mainly refer to the following : - Allowances for loan loss (Notes 13 and 41) - Impairment loss on certain assets (Notes 11, 13, 15, 16, 17, 39 and 40) - The useful lives of tangible and intangible assets (Notes 15, 16 and 17) - The fair value of assets and liabilities (Notes 8, 11, 12, 21 and 44) - Commitments and contingencies (Note 29) - Current and deferred taxes (Note 18) In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 43

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31 , 2023 , and 2022 , and December 31 , 2022 NOTE 02 - BREAKDOWN OF SIGNIFICANT ACCOUNTING CRITERIA, continued w. Earnings per share Basic earnings per share are calculated by dividing the net income attributable to the equity holders of the Bank by the weighted average number of shares outstanding during the reported period . Diluted earnings per share are calculated similarly to basic earnings . Still, the weighted average number of outstanding shares is adjusted to consider the potential diluting effect of stock options, warrants, and convertible debt . As of March 31 , 2023 , and 2022 and December 31 of 2022 , the Bank does not hold any instruments that have a dilutive effect on equity . x. Temporary acquisition (assignment) of assets Purchases or sales of financial assets under non - optional repurchase agreements at a fixed price (repos) are recorded in the Interim Consolidated Statements of Financial Position as a financial assignment based on the nature of the debtor (the creditor) under 'Deposits in the Central Bank of Chile', 'Deposits in financial institutions' or 'Loans and accounts receivable from customers' ('Deposits from Central Bank of Chile', 'Deposits from financial institutions' or 'Deposits and collections') . The difference between the purchase and sale prices is recorded as financial interest over the contract's life . y. Assets and investment funds managed by the Bank The assets managed by the different companies that form part of the Bank's consolidation perimeter (Santander SA Sociedad Securitizadora) that third parties own are not included in the Interim Consolidated Statements of Financial Position . Nevertheless, the Interim Consolidated Statement of Income includes management fees in 'Fee and commission income' . z. Provision for mandatory dividends As of March 31 , 2023 and 2022 , and December 31 , 2022 , the Bank recognised a liability (provision) for minimum or mandatory dividends . This provision is made under Article 79 of the Chilean Corporation Law, which is in the Bank's internal policy . It requires at least 30 % of net income for the period to be distributed, except for an opposing resolution adopted at the respective shareholders' meeting by a unanimous vote of the outstanding shares . This provision is recorded as a deduction from 'Retained earnings' under 'Provision for dividends, interest payments and repricing of equity financial instruments' in the Interim Consolidated Statements of Changes in Equity . In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 44

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and December 31, 2022 NOTE 03 - NEW ACCOUNTING PRONOUNCEMENTS ISSUED AND ADOPTED OR ISSUED AND NOT YET ADOPTED 1. Pronouncements issued and adopted As of the date these Interim Consolidated Financial Statements were published, the new accounting pronouncements issued by both the FMC and the International Accounting Standards Board, which the Bank has fully adopted, are set out below : a. Accounting Standards issued by the Financial Market Commission. There are no new pronouncements issued or adopted during this period. b. Accounting Standards issued by the International Accounting Standards Board. Amendment to IAS 1 'Classification of liabilities as current - noncurrent’ . On January 23 , 2020 , The IASB issued an amendment affecting only the presentation of liabilities in the financial statements . The classification as current - noncurrent will need to be based on the existing rights by the end of the reporting period and requires aligning all paragraphs affected, which refer to the right to defer settlement for at least 12 months, making clear that only the rights that exist at the end of the reporting date will affect the liability’s classification . In this same line, it is noted that the classification is not affected by an entity’s intentions or expectations to exercise its right to defer settlement . The amendment specifies that ‘settlement’ refers to the transfer of cash, equity instruments and other assets or services to the counterparty . This amendment is effective as of January 1 , 2023 , to be applied retrospectively, with early application permitted . This amendment does not have any material impact on the presentation of the Interim Consolidated Financial Statements of the Bank . Amendment to IFRS 8 – Definition of accounting estimates . As of February 12 , 2021 , the IASB published this amendment to help entities distinguish between accounting policies and accounting estimates . According to the new definition, ‘accounting estimates’ are ‘monetary amounts in financial statements subject to measurement uncertainty . ’ The amendments are effective for the annual financial exercises starting January 1 , 2023 , including the changes to accounting policies and accounting estimates that occur in or after the beginning of this period . Early application is permitted . This amendment does not have any material impact on the presentation of the Interim Consolidated Financial Statements of the Bank . Amendment to IAS 1 and IFRS Practice Statement 2 – Disclosure of Accounting Policies . On February 12 , 2021 , the IASB published this amendment to help preparers decide which accounting policies to disclose in their financial statements . These amendments are detailed below. An entity is now required to disclose its material accounting policy information instead of its significant accounting policies. It explains how an entity can identify material accounting policy information and gives examples of when it is likely to be material. The amendments clarify that accounting policy information may be material because of its nature, even if the related amounts are immaterial; the amendments clarify that accounting policy information is material if users of an entity’s financial statements need it to understand other material information in the financial statements. The amendments clarify that if an entity discloses immaterial accounting policy information, such information shall not obscure material accounting policy information. In addition, IFRS Practice Statement 2 has been amended by adding guidance and examples to explain the application of the ‘four - step materiality process’ to accounting policy information in order to support the amendments to IAS 1. The amendments are applied prospectively. The amendments to IAS 1 are effective for annual periods beginning or after 1 January 2023. Earlier application is permitted. Once the entity applies the amendments to IAS 1, it is also permitted to apply the amendments to IFRS Practice Statement 2 . The Bank has reviewed its disclosures under these standards resulting in no material amendments . In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 45

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31 , 2023 , and 2022 , and December 31 , 2022 NOTE 03 - NEW ACCOUNTING PRONOUNCEMENTS ISSUED AND ADOPTED OR ISSUED AND NOT YET ADOPTED, continued Amendment to IAS 12 - Deferred Taxation of Assets and Liabilities arising from a Single Transaction . This amendment, issued on May 7 , 2021 , regards the treatment of deferred taxes over leases and decommissioning obligations . In these cases, the entities shall recognise deferred assets and liabilities if equal deductible and temporary taxable differences arise . The amendment is effective for annual reporting periods beginning on or after 1 January 2023 , with early adoption permitted . Management has implemented this amendment to the Interim Financial Consolidated Statements of the Bank . Amendment to IFRS 17 - Initial Application of IFRS 17 and IFRS 9 — Comparative Information . This amendment was issued on December 9 , 2021 . It considers that if an entity applies for the first time both IFRS 17 and IFRS 9 simultaneously, they can apply to a ‘classification overlay’ in order to present comparative information regarding financial assets if this comparative information has not been restated per IFRS 9 . The comparative information of a financial asset will not be restated if the entity chooses not to do so for previous financial periods, or the entity restates prior financial exercises, but the financial asset has been derecognised during those previous periods . An entity that opts to apply this amendment will do so when first applying IFRS 17 (January 1 , 2023 ) . This amendment has no material impact on the presentation of the Interim Consolidated Financial Statements . 2. Issued pronouncements which have not yet been adopted As of the reporting date of these Interim Consolidated Financial Statements, new International Financial Reporting Standards had been published, as well as their interpretation and the FMC standards, which were not mandatory as of December 31 , 2022 . Accordingly, while the IASB permits an early application in some cases, the Bank has not undertaken its application by such date . a. Accounting Standards issued by the Financial Market Commission. General Standard No 484 - Commissions on credit operations . Law No 18 , 010 and adjustment to current contracts . As of August 5 , 2022 , the FMC has issued this instruction to establish requirements, rules and conditions that fees charged must comply with regarding money lending transactions . In general terms, any payment that the creditor receives or is entitled to receive will be considered interest, except for those that have a special legal regime and those that comply with the following : 1. The charge made to the debtor must be calculated based on the service provision’s cost. 2. The service must be real and veritably provided to the debtor and distinct from those inherent to the money lending operation. 3. The amount to be paid by the debtor must have been expressly informed and accepted by the debtor before collection and service provision. 4. The charges deriving from the services contracted for credit operations must be made available to the public via the same channels used to make offers or secure contracts of credit operations. Inherent services are defined as those necessary to initiate, execute, materialise or terminate the credit operation and those that the creditor is obliged to provide in compliance with legal and regulatory requirements applicable to credit operations. As set out above, the same requirements and rules governing fees and commissions apply to money lending transactions that use credit lines from current accounts or credit cards. Management, operation and maintenance services must be considered fees, provided that the charge is not based on the credit operation’s amount or has been applied for another service product. Any charges that do not comply with commissions must be considered fees to calculate the maximum conventional rate. The instructions are effective as of August 1, 2023. Institutions that need to modify contracts must communicate so at their own expense, to their clients by the means agreed with them, alongside providing an annexe of amendments and their justifying for their acceptance or rejection. Institutions may only terminate the contract in the event of rejection of the amendments intended to align the contracts to the changes introduced. The Bank is currently assessing the impacts of this new standard. In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 46

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31 , 2023 , and 2022 , and December 31 , 2022 NOTE 03 - NEW ACCOUNTING PRONOUNCEMENTS ISSUED AND ADOPTED OR ISSUED AND NOT YET ADOPTED, continued Regulation for the new standardised methodology to calculate provisions for the consumer portfolio - On August 17 , 2022 , the Financial Market Commission (FMC) announced the start of the public consultation regarding the standardised methodology for the calculation of consumer loans and contingent credits granted by banking institutions established in the country . The regulation under consultation would allow all loans granted by banks to have a standard methodology for calculating provisions and other portfolios . This consultation period ended on December 31 , 2022 . As of the date these financial statements were issued, the final regulations have not yet been published . b. Accounting Standards issued by the International Accounting Standards Board. Amendments to IFRS 10 and IAS 28 - Sale and Contribution of Assets between an Investor and its Associate or Joint Venture - As of September 11 , 2014 , the IASB published this amendment, which clarifies the scope of the gains and losses recognised in a transaction involving an associate or joint venture, indicating it will depend on whether the asset sold or the contribution constitutes a business . Therefore, the IASB concluded that all gains or losses should be recognised at the business' loss of control . Likewise, profit or loss resulting from the sale or contribution of a non - business subsidiary (IFRS 3 definition) to an associate or joint venture must be recognised only to the extent of the unrelated interests in such associate or joint venture . This standard initially took effect on January 1 , 2016 . Nevertheless, on December 17 , 2015 , the IASB issued an 'Effective Date of Amendment to IFRS 10 and IAS 28 ', postponing this standard's enactment indefinitely . Accordingly, the Administration will await the new validity to assess the potential effects of this modification . Amendment to IFRS 16 - Lease liability on a sale and leaseback . This amendment, issued on September 22 , 2022 , requires a lessee - seller to measure lease liabilities arising subsequent to a lease in a manner that does not recognise any gain or loss related to the right - of - use . The new requirements do not prevent a vendor - lessee from recognising in profit or loss any gain or loss related to a lease's partial or total termination . The amendments are effective for annual periods beginning on or after January 1 , 2024 . Early application is allowed . The administration will evaluate this amendment whenever it presents leaseback sales . In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 47

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and December 31, 2022 NOTE 04 - ACCOUNTING CHANGES As of the date these Interim Consolidated Financial Statements were issued, there were no accounting changes to disclose. In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 48

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31 , 2023 , and 2022 , and December 31 , 2022 NOTE 05 - SIGNIFICANT EVENTS As of March 31 , 2023 , the following events, considered by the Bank's management as material and affecting the Bank's operations, have been recorded in the Interim Consolidated Financial Statements . Board of Directors At a Directors Board Meeting on March 28 , 2023 , it was agreed upon to summon an Ordinary Shareholders' Meeting for April 19 , 2023 , to propose a distribution of profits and dividend payments taken from the 60 % of retained earnings as of December 31 , 2022 , equivalent to $ 2 . 57469221 per share . It also was proposed that the remaining 40 % of profits be used to increase the Bank's reserves and/or profit . Considering the above, the Bank decided to increase the minimum provision for dividend payments up to 60 % of the profits accrued during 2022 . In the same Board meeting mentioned above, the resignation of Alternate Director Oscar von Chrismar was acknowledged, being replaced by Maria Olivia Recart Herrera . Bond Issuance In 2023 , the Bank has issued current bonds in CLP 475 , 000 , 000 , 000 and UF 15 , 000 , 000 . Details of the placements made during the current year are included in Note 22 . In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 49 Other The Ministry of Treasury, alongside The Chilean Banks and Financial Institutions Association A . G . (ABIF), announced that Transbank shareholder banks started the process of selling their stock ownership in this company in consideration of the enactment of the four - part model in the payment system . Shareholders have determined JPMorgan as their advisor bank for the disposal . Maturity Date Issue Amount Issue Date Annual Issuance rate Original Term (years) Currency Series 01 - 12 - 2028 100,000,000,000 01 - 12 - 2022 6.60% 6 CLP AA1 01 - 06 - 2029 100,000,000,000 01 - 12 - 2022 6.20% 6.5 CLP AA2 01 - 09 - 2030 100,000,000,000 01 - 09 - 2022 6.2% 8 CLP AA3 01 - 03 - 2033 100,000,000,000 01 - 09 - 2022 6.25% 10.5 CLP AA4 01 - 02 - 2032 10,000,000 01 - 08 - 2022 2.95% 9.5 UF AA5 01 - 10 - 2037 5,000,000 01 - 10 - 2022 2.70% 15 UF AA6 01 - 08 - 2026 75,000,000,000 01 - 02 - 2023 6.80% 3.5 CLP AA7

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31 , 2023 , and 2022 , and December 31 , 2022 NOTE 06 - BUSINESS SEGMENTS The Bank manages and measures the performance of its operations by business segments . Their reporting is based on the Bank's internal information system for management of the segments established by the Bank . Inter - segment transactions are conducted under normal commercial terms and conditions . Each segment's assets, liabilities, and results include items directly attributable to the segment on which they can be allocated reasonably . A business segment comprises clients to whom a differentiated product offer is given but who are alike performance - wise and in how they are measured . To comply with the strategic objectives established by the senior management and adapt to changing market conditions, the Bank makes organisational adjustments from time to time . These adjustments affect how it is managed or administered to a greater or lesser extent . The present disclosure reveals information on how the Bank is managed as of March 31 , 2023 . The Bank comprises the following business segments : Retail Banking It comprises individuals and small to middle - sized companies (SMEs) with an annual income of less than MCh $ 3 , 000 . This segment is offered a variety of services, including consumer loans, credit cards, commercial loans, foreign exchange, mortgage loans, debit cards, current accounts, savings products, mutual funds, stockbroking and insurance . Additionally, SME clients are offered government - guaranteed loans, leasing and factoring . Middle market This segment comprises companies and large corporations with annual sales exceeding MCh $ 3 , 000 , such as universities, government entities, municipalities and regional governments and companies in the real estate sector executing projects for sale to third parties, along with all construction companies with annual sales over MCh $ 800 and no market cap . The companies within this segment have access to many products, including commercial loans, leasing, factoring, trade finance, credit cards, mortgage loans, current accounts, transactional services, treasury services, financial consulting, savings products, mutual funds and insurance . Additionally, companies in the real estate industry are offered specialised services to finance residential projects, with the aim of raising mortgage loan sales . Global Corporate Banking This segment comprises foreign multinational companies or Chilean multinational companies with sales above MCh $ 10 , 000 . This segment offers a wide range of products, including commercial lending, leasing, factoring, trade finance, credit cards, mortgage loans, current accounts, transactional services, treasury services, financial consulting, investment banking, savings products, mutual funds and insurance . This segment also counts with a Treasury Division, which provides sophisticated financial products to Middle - market and Global Corporate Banking companies . These include products such as short - term financing and fundraising, brokerage services, derivatives, securitisation, and other tailor - made products . In addition, the Treasury Division may act as a broker for transactions as well as manage the Bank's investment portfolio . Corporate Activities ('Other') This segment includes Financial Management, which performs the global management of the structural exchange rate item, the parent entity's structural interest rate risk, and the liquidity risk . The latter is undertaken through the implementation of issuances and their use . Likewise, it also manages its own resources, the capital endowment of each unit and the cost of In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 50

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31 , 2023 , and 2022 , and December 31 , 2022 NOTE 06 - BUSINESS SEGMENTS, continued financing the investments made . This usually entails that this segment has a negative contribution to the results . Furthermore, this segment incorporates all intra - segment results and all activities not allocated to a segment or product with customers . The accounting policies of the segments are the same as those described in the breakdown of accounting policies and are customised to meet the Bank's management needs . The Bank's earnings stem mostly from income from interests, fees, commissions, and financial operations . Accordingly, the highest decision - making authority for each segment relies primarily on interest income, fee income and provision for expenses to assess segment performance and thus make decisions on the resource allocation to the segments . The tables below show the Bank's balances by business segment as of March 31 , 2023 , and 2022 . In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 51 March 31, 2023 Net segment contribution Support expenses (4) Financi al transac tions, net (3) Net commission income Net interest and adjustme nt income Demand and time deposits (2) Loans and receivables from customers (1) Provisions MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Segments 163,665 (158,954) (113,075) 10,224 95,020 330,450 13,574,181 27,368,553 Retail Banking 111,441 (25,593) (5,288) 7,757 16,828 117,737 6,170,090 8,555,611 Middle market 109,797 (22,597) 1,416 56,720 11,722 62,536 7,508,120 2,943,347 Corporate Investment Banking (225,521) (3,414) 2,698 2,671 6,365 (233,842) 819,952 43,626 Corporate Activities ('Other') 159,382 (210,558) (114,248) 77,372 129,935 276,881 28,072,343 38,911,137 Total 544 Other operating income (6,769) Other operating expenses and impairments 2,929 Results of non - current assets and disposal groups not qualifying for discontinued operations 1,542 Results from investments in companies 157,628 Results from continuing operations before taxes (17,838) Income tax 139,790 Profit from continuing operations after taxes - Results from discontinued operations before taxes - Discontinued operations tax - Results from discontinued operations after taxes 139,790 Net income for the period (1) Loans receivable from customers plus the balance indebted by banks, without deducting their allowances for loan losses. (2) Corresponds to deposits, demand liabilities, and other time deposits. (3) Corresponds to the sum of net income (loss) from financial operations and net foreign exchange gain (loss). (4) Corresponds to the sum of staff salaries and expenses, administrative expenses, depreciation and amortisation.

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and December 31, 2022 NOTE 06 - BUSINESS SEGMENTS, continued In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 52 March 31, 2022 Net segment contribution Support expenses (4) Financi al transac tions, net (3) Net commission income Net interest and adjustme nt income Demand and time deposits (2) Loans and receivables from customers (1) Provisions MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Segments 148,144 (150,608) (66,806) 9,092 73,885 282,582 13,713,222 25,749,119 Retail Banking 85,034 (24,340) (5,186) 4,546 15,835 94,178 6,453,420 8,665,425 Middle market 62,143 (21,276) (285) 41,932 8,005 33,767 6,298,240 2,405,864 Corporate Investment Banking 14,500 (3,979) 831 1,288 (579) 16,939 574,937 29,279 Corporate Activities ('Other') 309,821 (200,203) (71,447) 56,858 97,147 427,466 27,039,819 36,849,688 Total 221 Other operating income (19,686) Other operating expenses and impairments (900) Results of non - current assets and disposal groups not qualifying for discontinued operations 1,360 Results from investments in companies 290,816 Results from continuing operations before taxes (51,110) Income tax 239,706 Profit from continuing operations after taxes - Results from discontinued operations before taxes - Discontinued operations tax - Results from discontinued operations after taxes 239,706 Net income for the period (1) Loans receivable from customers plus the balance indebted by banks, without deducting their allowances for loan losses. (2) Corresponds to deposits, demand liabilities, and other time deposits, (3) Corresponds to the sum of net income (loss) from financial operations and net foreign exchange gain (loss), (4) Corresponds to the sum of personnel salaries and expenses, administrative expenses, depreciation and amortisation.

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and December 31, 2022 NOTE 07 - CASH AND CASH EQUIVALENTS a. The detail of the balances included under cash and cash equivalents is as follows: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 53 The balance of funds held in cash at the Central Bank of Chile follows regulations concerning requirements and technical reserves that the Bank must maintain on average every month, although these funds are immediately available . b. Operations in the process of settlement: Cash items in collection process are transactions in which only the settlement — that will increase or decrease the funds at the Central Bank of Chile or banks abroad – is pending . This process usually happens within the next 24 to 48 working hours following the transaction . These operations are presented as follows : As of December 31, As of March 31, 2022 2023 MCh$ MCh$ Assets 93,650 105,125 Documents held by other banks (document to be cleared) 750,166 760,259 Funds to be received 843,816 865,384 Subtotal Liabilities 746,872 791,211 Funds to be paid 746,872 791,211 Subtotal 96,944 74,173 Cash items in collection process As of December 31, As of March 31, 2022 2023 MCh$ MCh$ Cash and deposits in banks 1,110,830 1,123,916 Cash 444,491 530,103 Deposits at the Central Bank of Chile - - Deposits in foreign Central Banks 2,646 3,855 Deposits in domestic banks 424,975 928,735 Deposits foreign banks 1,982,942 2,586,609 Subtotal cash and deposits with banks 96,944 74,173 Cash items in collection process - - Other cash equivalents 2,079,886 2,660,782 Total cash and cash equivalents

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and December 31, 2022 NOTE 08 - FINANCIAL ASSETS HELD FOR TRADING WITH CHANGES IN PROFIT AND LOSS a) As of March 31, 2023, and December of 2022, the Bank holds the following portfolio of financial assets held for trading at fair value through profit or loss: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 54 Fair value As of December 31, As of March 31, 2022 2023 MCh$ MCh$ Financial derivatives contracts 1,669,807 1,803,514 Forwards 9,992,123 9,682,946 Swaps 1,429 1,035 Call options 9,601 3,299 Put options - - Future - - Other 11,672,960 11,490,794 Subtotal Debt financial instruments 153,967 141,015 Instruments of the Chilean Central Bank and Government - - Other financial debt instruments issued in the country 79 75 Financial debt instruments issued abroad 154,046 141,090 Subtotal Other financial instruments - - Mutual Fund Investments - - Equity instruments - - Loans originated and purchased by the entity - - Other - - Subtotal 11,827,006 11,631,884 Total

Banco Santander - Chile and Affiliates NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023 and 2022, and December 31, 2022 NOTE 08 - FINANCIAL ASSETS HELD FOR TRADING WITH CHANGES IN PROFIT AND LOSS b) Details of financial derivative contracts as of March 31, 2023, and December 31, 2022, are as follows: March 31, 2023 Notional Fair value Total More than 5 years Between 3 years and 5 years Between 1 year and 3 years Between 3 months and 1 year Between 1 month and 3 months Up to 1 month On demand MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Financial derivatives contracts 1,803,514 41,534,266 825,812 805,119 5,449,637 15,040,757 6,926,977 12,485,964 - Currency forwards 3,620,178 97,583,569 17,267,620 11,372,297 25,910,427 28,916,410 8,325,166 5,791,649 - Interest rate swaps 6,062,768 64,370,536 22,034,046 10,098,568 23,384,293 6,940,129 1,155,699 757,801 - Currency and interest rate swaps 1,035 152,726 - - - 39,569 10,514 102,643 - Currency call options - - - - - - - - - Call interest rate options 3,299 132,313 - - 3,972 4,448 6,434 117,459 - Put currency options - - - - - - - - - Put interest rate options - - - - - - - - - Interest rate futures - - - - - - - - - Other derivatives 11,490,794 203,773,410 40,127,478 22,275,984 54,748,329 50,941,313 16,424,790 19,255,516 - Total In teri m C on s oli d ate d Fi n anci al Sta te me n t Marc h 20 23 / B an c o San ta n de r C hil e 55

Banco Santander - Chile and Affiliates NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023 and 2022, and December 31, 2022 NOTE 08 - FINANCIAL ASSETS HELD FOR TRADING WITH CHANGES IN PROFIT AND LOSS, continued As of March 31, 2023, and December 31, 2022, the detail of the derivative financial instruments portfolio for trading is as follows. December 31, 2022 Notional On demand MCh$ Up to 1 month MCh$ Between 1 Between 3 month and 3 months and Between 3 More than 5 years MCh$ Total Fair value months MCh$ In teri m C on s oli d ate d Fi n anci al Sta te me n t Marc h 20 23 / B an c o San ta n de r C hil e 56 1 year MCh$ Between 1 year and 3 years MCh$ years and 5 years MCh$ MCh$ MCh$ Financial derivatives contracts 1,669,807 34,652,380 737,202 1,009,395 6,178,376 9,828,036 7,653,539 9,245,832 - Currency forwards 4,283,817 93,513,106 16,373,617 11,658,182 24,855,247 26,246,111 8,796,596 5,583,353 - Interest rate swaps 5,708,306 61,029,754 21,297,126 11,689,202 19,811,336 5,398,185 1,575,109 1,258,796 - Currency and interest rate swaps 1,429 204,745 - - - 24,744 80,844 99,157 - Currency call options - - - - - - - - - Call interest rate options 9,601 319,228 - - - 7,816 1,699 309,713 - Put currency options - - - - - - - - - Put interest rate options - - - - - - - - - Interest rate futures - - - - - - - - - Other derivatives 11,672,960 189,719,213 38,407,945 24,356,779 50,884,959 41,504,892 18,107,787 16,496,851 - Total

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 09 - NON - MARKETABLE FINANCIAL ASSETS MANDATORILY MEASURED AT FAIR VALUE THROUGH PROFIT OR LOSS The Bank has no assets classified in this category. In teri m C on s oli d ate d Fi n anci al Sta te me n t Marc h 20 23 / B an c o San ta n de r C hil e 57

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 10 - FINANCIAL ASSETS AND LIABILITIES DESIGNATED AT FAIR VALUE THROUGH PROFIT OR LOSS The Bank has no assets classified in this category. In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 58

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 11 - FINANCIAL ASSETS AT FAIR VALUE THROUGH OTHER COMPREHENSIVE INCOME Financial assets at fair value through other comprehensive income correspond to: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 59 As of December 31, As of March 31, Financial assets at fair value through other comprehensive income 2022 2023 MCh$ MCh$ Debt financial instruments Instruments of the Chilean Central Bank and Government 3,331,264 3,938,733 Debt financial instruments of the Central Bank of Chile 742,717 887,493 Bonds and promissory notes of the Treasury General of the Republic 432 442 Other fiscal debt financial instruments 4,074,413 4,826,668 Subtotal 207,280 268,122 Under repurchase agreement Other financial debt instruments issued in the country 9,891 8,676 Debt financial instruments of other banks in the country - - Bonds and bills of exchange of domestic companies 7 6 Other financial debt instruments issued in the country 9,898 8,682 Subtotal 91 141 Under repurchase agreement Financial debt instruments issued abroad 1,668,670 1,312,794 Foreign Central Bank debt financial instruments - - Financial debt instruments of foreign governments and fiscal entities abroad - - Debt financial instruments of other banks abroad - - Bonds and bills of exchange of companies abroad 127,752 187,956 Other financial debt instruments issued abroad 1,796,422 1,500,750 Subtotal 127,752 120,863 Under repurchase agreement Other financial instruments Loans originated and purchased by the entity - - Interbank loans 142,306 206,773 Commercial loans - - Mortgage loans - - Consumer loans - - Other 142,306 206,773 Subtotal 6,023,039 6,542,873 TOTAL In debt financial instruments, the item 'Of Chilean Central Bank and Government' includes instruments that guarantee margins on derivative transactions through Comder Contraparte Central SA for MCh $ 183 , 480 and MCh $ 133 , 480 as of March 31 , 2023 , and December 31 , 2022 , respectively . In debt financial instruments, the item 'Debt financial instruments issued abroad' includes instruments that guarantee margins on derivative transactions through the London Clearing House (LCH) in the amount of MCh $ 65 , 137 and MCh $ 69 , 666 as of March 31 , 2023 , and December 31 , 2022 , respectively . Additionally, to comply with the initial margin requirements of the European Market Infrastructure Regulation (EMIR), collateral instruments are held with Euroclear for the amount of MCh $ 524 , 271 and MCh $ 590 , 466 as of March 31 , 2023 , and December 31 , 2022 , respectively . Provisions for credit risk on debt financial instruments amounted to MCh $ 1 , 241 and MCh $ 877 as of March 31 , 2023 , and December 31 , 2022 , respectively . Provisions for credit risk on commercial loans amounted to MCh $ 363 and MCh $ 326 as of March 31 , 2023 , and December 31 , 2022 , respectively .

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 11 - FINANCIAL ASSETS AT FAIR VALUE THROUGH OTHER COMPREHENSIVE INCOME, continued As of March 31, 2023, and December 31, 2022, fair value changes from debt financial instruments and trade placements are included in other comprehensive income accrued for: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 60 As of December 31, As of March 31, 2022 MCh$ 2023 MCh$ (109,392) (105,237) Unrealised profit (loss) (110,130) (104,527) Attributable to equity holders 738 (710) Attributable to non - controlling interest Debt financial instruments generated the following gross realised gains and losses on the sale of instruments. There are no sales of commercial loans at fair value with effects in other comprehensive income: As of March 31, 2022 2023 MCh$ MCh$ 41,857 71,611 Sales of available - for - sale investments that generate realised profit 112 - Profit incurred 478,969 342,680 Sales of available - for - sale investments that generate a realised loss 2,546 34,838 Loss incurred The movement of expected credit loss as of March 31, 2023, is as follows: Total Phase 3 Phase 2 Phase 1 Debt financial instruments MCh$ MCh$ MCh$ 877 - - 877 Expected credit loss as of January 1, 2023 2,194 - - 2,194 Newly acquired assets - - - - Transfer to phase 1 - - - - Transfer to phase 2 - - - - Transfer to phase 3 (1,868) - - (1,868) Assets derecognised (excluding charge - offs) 38 - - 38 Change in measurement without portfolio reclassifying during the period - - - - Sale or assignment of credits - - - - Adjustment for changes and other 1,241 - - 1,241 As of March 31, 2023 Total Phase 3 Phase 2 Phase 1 Commercial loans MCh$ MCh$ MCh$ 326 - - 326 Expected credit loss as of January 1, 2023 48 - - 48 New assets originated - - - - Transfer to phase 1 - - - - Transfer to phase 2 - - - - Transfer to phase 3 - - Assets derecognised (excluding charge - offs) (11) - - (11) Change in measurement without portfolio reclassifying during the period - - - - Sale or assignment of credits - - - - Adjustment for changes and other 363 - - 363 As of March 31, 2023

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 11 - FINANCIAL ASSETS AT FAIR VALUE THROUGH OTHER COMPREHENSIVE INCOME, continued The movement of expected credit loss as of December 31, 2022, is as follows: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 61 Total Phase 3 Phase 2 Phase 1 Debt financial instruments MCh$ MCh$ MCh$ 703 - - 703 Expected credit loss as of January 1, 2022 5,627 - - 5,627 Newly acquired assets - - - - Transfer to phase 1 - - - - Transfer to phase 2 - - - - Transfer to phase 3 (5,553) - - (5,553) Assets derecognised (excluding charge - offs) 100 - - 100 Change in measurement without portfolio reclassifying during the period - - - Sale or assignment of credits - - - - Adjustment for changes and other 877 - - 877 As of December 31, 2022 Total Phase 3 Phase 2 Phase 1 Commercial loans MCh$ MCh$ MCh$ 226 - - 226 Expected credit loss as of January 1, 2022 76 - - 76 New assets originated - - - - Transfer to phase 1 - - - - Transfer to phase 2 - - - - Transfer to phase 3 (53) - - (53) Assets derecognised (excluding charge - offs) 77 - - 77 Change in measurement without portfolio reclassifying during the period - - - - Sale or assignment of credits - - - - Adjustment for changes and other 326 - - 326 As of December 31, 2022 The Bank assessed those instruments with unrealised loss as of March 31 , 2023 , and concluded they were not impaired . This review assessed the economic drivers of any decline, the securities' issuer credit ratings and the Bank's intention and ability to hold the securities until the unrealised loss is recovered . Based on this analysis, the Bank considers there are no significant or prolonged declines or changes in credit risk to cause impairment in its investment portfolio . Most of these instruments' fair value decline was caused by market conditions that the Bank considers temporary . All instruments with unrealised loss as of March 31 , 2023 , were not in a continuous unrealised loss position for over one year .

In teri m C on s oli d ate d Fi n anci al Sta te me n t Marc h 20 23 / B an c o San ta n de r C hil e 62 Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 11 - FINANCIAL ASSETS AT FAIR VALUE THROUGH OTHER COMPREHENSIVE INCOME, continued The following table shows debt instruments and trading placements at fair value through accumulated other comprehensive income of unrealised gains and losses as of March 31, 2023, and December 31, 2022: As of March 31, 2023 Unrealised Unrealised Fair Amortised loss profit value cost MCh$ MCh$ MCh$ MCh$ Instruments of the Chilean Central Bank and Government (36) 821 3,938,733 3,937,606 Debt financial instruments of the Central Bank of Chile (87,773) 342 887,493 975,266 Bonds and promissory notes of the Treasury General of the Republic - 27 442 415 Other fiscal debt financial instruments (87,809) 1,190 4,826,668 4,913,287 Subtotal Other financial debt instruments issued in the country (120) 31 8,676 8,765 Debt financial instruments of other banks in the country - - - - Bonds and bills of exchange of domestic companies - - 6 6 Other financial debt instruments issued in the country (120) 31 8,682 8,771 Subtotal Foreign Central Bank debt financial instruments (42,706) 23,984 1,312,794 1,331,516 Financial debt instruments of foreign governments and fiscal entities abroad - - - - Debt financial instruments of other banks abroad - - - - Bonds and bills of exchange of companies abroad (906) 8,996 187,956 179,866 Other financial debt instruments issued abroad (43,612) 32,980 1,500,750 1,511,382 Subtotal Loans originated and purchased by the entity (7,897) - 206,773 214,670 Commercial loans (7,897) - 206,773 214,670 Subtotal (139,438) 34,201 6,542,873 5,548,110 Total

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 11 - FINANCIAL ASSETS AT FAIR VALUE THROUGH OTHER COMPREHENSIVE INCOME, continued In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 63 As of December 31, 2022 Unrealised Unrealised Fair Amortised loss profit value cost MCh$ MCh$ MCh$ MCh$ Instruments of the Chilean Central Bank and Government (2,641) 2,270 3,331,264 3,331,635 Debt financial instruments of the Central Bank of Chile (92,218) 27 742,717 834,908 Bonds and promissory notes of the Treasury General of the Republic - 25 432 407 Other fiscal debt financial instruments (94,859) 2,322 4,074,413 4,166,950 Subtotal Other financial debt instruments issued in the country (207) 16 9,891 10,082 Debt financial instruments of other banks in the country - - - - Bonds and bills of exchange of domestic companies - 1 7 6 Other financial debt instruments issued in the country (207) 17 9,898 10,088 Subtotal Foreign Central Bank debt financial instruments (53,592) 39,210 1,668,670 1,683,052 Financial debt instruments of foreign governments and fiscal entities abroad - - - - Debt financial instruments of other banks abroad - - - - Bonds and bills of exchange of companies abroad - 11,401 127,752 116,351 Other financial debt instruments issued abroad (53,592) 50,611 1,796,422 1,799,403 Subtotal Loans originated and purchased by the entity (13,684) - 142,306 155,990 Commercial loans (13,684) - 142,306 155,990 Subtotal (162,342) 52,950 6,023,039 6,132,431 Total

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 12 - FINANCIAL DERIVATIVE CONTRACTS FOR HEDGING ACCOUNTING PURPOSES As of March 31, 2023, and December 31, 2022, the Bank holds the following portfolio of fair value hedging and cash flow hedge derivatives: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 64 As of March 31, 2023 Fair value Notional amount More than 5 Between 3 years Between 1 year Between 3 months Between 1 month Up to On Liabilities Assets Total years and 5 years and 3 years and 1 year and 3 months 1 month demand MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Fair value hedge derivatives - - - - - - - - - - Currency forwards 1,266,695 150,046 10,141,830 1,298,762 569,345 6,950,608 845,458 330,317 147,340 - Interest rate swaps 477,349 44,380 7,168,790 1,501,340 824,994 3,156,953 1,001,187 684,316 - - Currency and interest rate swaps - - - - - - - - - - Currency call options - - - - - - - - - - Call interest rate options - - - - - - - - - - Put currency options - - - - - - - - - - Put interest rate options - - - - - - - - - - Interest rate futures - - - - - - - - - - Other derivatives 1,744,044 194,426 17,310,620 2,800,102 1,394,339 10,107,561 1,846,645 1,014,633 147,340 - Subtotal Cash flow hedge derivatives 269 263 723,478 - - - 24,903 359,774 338,801 - Currency forwards - - - - - - - - - - Interest rate swaps 1,321,448 165,650 13,631,452 1,836,615 1,433,999 6,739,986 2,911,890 561,979 146,983 - Currency and interest rate swaps - - - - - - - - - - Currency call options - - - - - - - - - - Call interest rate options - - - - - - - - - - Put currency options - - - - - - - - - - Put interest rate options - - - - - - - - - - Interest rate futures - - - - - - - - - - Other derivatives 1,321,717 165,913 14,354,930 1,836,615 1,433,999 6,739,986 2,936,793 921,753 485,784 - Subtotal 3,065,761 360,339 31,665,550 4,636,717 2,828,338 16,847,547 4,783,438 1,936,386 633,124 - Total

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 12 - FINANCIAL DERIVATIVES CONTRACTS FOR HEDGE ACCOUNTING PURPOSES, continued In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 65 As of December 31, 2022 Fair value Notional amount More than 5 Between 3 years Between 1 year Between 3 months Between 1 month Up to On Liabilities Assets Total years and 5 years and 3 years and 1 year and 3 months 1 month demand MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Fair value hedge derivatives - - - - - - - - - - Currency forwards 1,166,339 213,478 11,015,055 1,728,916 608,013 7,300,878 722,845 447,773 206,630 - Interest rate swaps 333,097 75,848 8,116,901 1,462,413 1,200,889 3,149,733 1,512,048 706,859 84,959 - Currency and interest rate swaps - - - - - - - - - - Currency call options - - - - - - - - - - Call interest rate options - - - - - - - - - - Put currency options - - - - - - - - - - Put interest rate options - - - - - - - - - - Interest rate futures - - - - - - - - - - Other derivatives 1,499,436 289,326 19,131,956 3,191,329 1,808,902 10,450,611 2,234,893 1,154,632 291,589 - Subtotal Cash flow hedge derivatives 35,332 823 2,571,126 - - - 554,696 1,839,766 176,664 - Currency forwards - - - - - - - - - - Interest rate swaps 1,254,026 187,613 14,479,898 2,261,958 2,077,260 6,703,372 2,019,072 932,204 486,032 - Currency and interest rate swaps - - - - - - - - - - Currency call options - - - - - - - - - - Call interest rate options - - - - - - - - - - Put currency options - - - - - - - - - - Put interest rate options - - - - - - - - - - Interest rate futures - - - - - - - - - - Other derivatives 1,289,358 188,436 17,051,024 2,261,958 2,077,260 6,703,372 2,573,768 2,771,970 662,696 - Subtotal 2,788,794 477,762 36,182,980 5,453,287 3,886,162 17,153,983 4,808,661 3,926,602 954,285 - Total

In teri m C on s oli d ate d Fi n anci al Sta te me n t Marc h 20 23 / B an c o San ta n de r C hil e 66 Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31 , 2023 , and 2022 , and as of December 31 , 2022 NOTE 12 - FINANCIAL DERIVATIVES CONTRACTS FOR HEDGE ACCOUNTING PURPOSES, continued a. Micro - hedge accounting Fair value micro - hedges The Bank uses cross - currency swaps, interest rate swaps, and call money swaps to cover its exposure to changes in the hedged item's fair value attributable to the interest rate . These hedging instruments change the effective cost of long - term issues from a fixed to a floating interest rate . The following is a notional breakdown of hedged items and hedging instruments under fair value hedges, effective as of March 31 , 2023 , and December 31 , 2022 , separated by term to maturity : As of March 31, 2023 More than 5 Between 3 years Between 1 year Between 3 months Between 1 month Up to On Total years and 5 years and 3 years and 1 year and 3 months 1 month demand MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Hedged item Credits and receivables from clients 169,197 - - - 169,197 - - - Commercial loans Investment instruments at FVOCI 82,415 82,415 - - - - - - Sovereign bond Chile - - - - - - - - Mortgage bills 1,537,067 981,022 556,045 - - - - - US Treasury bonds 250,000 - - - 250,000 - - - Bonds of the General Treasury of the Republic - - - - - - - - Bonds of the Central Bank of Chile Deposits and other time equivalents: 1,017,605 - - 91,515 361,273 417,477 147,340 - Term deposit Issued debt instruments: 4,390,128 699,146 660,416 2,786,496 244,070 - - - Current or senior bonds 736,362 479,049 177,878 - 79,435 - - - Subordinated Bonds Interbank borrowing: 914,896 - - - 317,740 597,156 - - Interbank loans 6,178,000 - - 6,178,000 - - - - Loans from the Central Bank of Chile 15,275,670 2,241,632 1,394,339 9,056,011 1,421,715 1,014,633 147,340 - Total Hedging instrument: 6,033,840 942,870 824,994 2,455,403 1,126,257 684,316 - - Currency and interest rate swaps 9,241,830 1,298,762 569,345 6,600,608 295,458 330,317 147,340 - Forwards 15,275,670 2,241,632 1,394,339 9,056,011 1,421,715 1,014,633 147,340 - Total

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 12 - FINANCIAL DERIVATIVES CONTRACTS FOR HEDGE ACCOUNTING PURPOSES, continued In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 67 As of December 31, 2022 More than 5 Between 3 years Between 1 year Between 3 months Between 1 month Up to On Total years and 5 years and 3 years and 1 year and 3 months 1 month demand MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Hedged item Credits and receivables from clients 180,963 - - - 180,963 - - - Commercial loans Investment instruments at FVOCI - - - - - - - - Sovereign bond Chile - - - - - - - - Mortgage bills 1,983,793 1,389,080 594,713 - - - - - US Treasury bonds - - - - - - - - Bonds of the General Treasury of the Republic - - - - - - - - Bonds of the Central Bank of Chile Deposits and other time equivalents: 1,669,764 - - 141,539 873,822 447,773 206,630 - Term deposit Issued debt instruments: 4,488,765 757,861 1,038,634 2,569,632 122,638 - - - Current or senior bonds 746,431 485,917 175,555 84,959 - - - - Subordinated Bonds Interbank borrowing: 1,849,288 - - - 1,057,470 706,859 84,959 - Interbank loans 6,178,000 - - 6,178,000 - - - - Loans from the Central Bank of Chile 17,097,004 2,632,858 1,808,902 8,974,130 2,234,893 1,154,632 291,589 - Total Hedging instrument: 6,981,950 903,942 1,200,890 2,573,252 1,512,048 706,859 84,959 - Currency and interest rate swaps 10,115,054 1,728,916 608,012 6,400,878 722,845 447,773 206,630 - Forwards 17,097,004 2,632,858 1,808,902 8,974,130 2,234,893 1,154,632 291,589 - Total

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31 , 2023 , and 2022 , and as of December 31 , 2022 NOTE 12 - FINANCIAL DERIVATIVES CONTRACTS FOR HEDGE ACCOUNTING PURPOSES, continued Cash flow micro - hedging The Bank uses cross - currency swaps to hedge the risk of the variability of cash flows attributable to changes in the interest rate of bonds and interbank loans issued at floating rates and to hedge foreign currency fluctuations, mainly in US dollars . In addition, it uses both forward and cross - currency swaps to hedge the inflation risk on certain items . The following are the notional amounts of the hedged item as of March 31 , 2023 , and 2022 , and December 31 , 2022 , and the period in which the flows will occur : In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 68 As of March 31, 2023 More than 5 Between 3 years Between 1 year Between 3 months Between 1 month Up to On Total years and 5 years and 3 years and 1 year and 3 months 1 month demand MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Hedged item Loans and receivables at amortised cost 10,315,273 1,182,167 902,761 5,294,597 1,607,646 842,318 485,784 - Mortgage loans Investment instruments at FVOCI - - - - - - - - Sovereign bond Chile - - - - - - - - Bonds of the Central Bank of Chile 684,277 191,906 - 492,371 - - - - Bonds of the General Treasury of the Republic Deposits and other time equivalents: - - - - - - - - Term deposit Issued debt instruments: 320,179 - - 320,179 - - - - Current or senior bonds 2,077,612 462,542 531,238 632,839 450,993 - - - Subordinated Bonds Interbank borrowing: 957,589 - - - 878,154 79,435 - - Interbank loans 14,354,930 1,836,615 1,433,999 6,739,986 2,936,793 921,753 485,784 - Total Hedging instrument: 13,631,452 1,836,615 1,433,999 6,739,986 2,911,890 561,979 146,983 - Currency and interest rate swaps 723,478 - - - 24,903 359,774 338,801 - Forwards 14,354,930 1,836,615 1,433,999 6,739,986 2,936,793 921,753 485,784 - Total

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 12 - FINANCIAL DERIVATIVES CONTRACTS FOR HEDGE ACCOUNTING PURPOSES, continued In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 69 As of December 31, 2022 More than 5 Between 3 years Between 1 year Between 3 months Between 1 month Up to On Total years and 5 years and 3 years and 1 year and 3 months 1 month demand MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Hedged item Loans and receivables at amortised cost 13,280,701 1,577,002 1,026,081 5,568,862 1,999,451 2,563,558 545,747 - Mortgage loans Investment instruments at FVOCI - - - - - - - - Sovereign bond Chile - - - - - - - - Bonds of the Central Bank of Chile 684,276 191,906 492,370 - - - - - Bonds of the General Treasury of the Republic Deposits and other time equivalents: - - - - - - - - Term deposit Issued debt instruments: 315,999 - - 315,999 - - - - Current or senior bonds 2,326,563 493,051 558,809 818,511 245,526 140,444 70,222 - Subordinated Bonds Interbank borrowing: 443,485 - - - 328,791 67,967 46,727 - Interbank loans 17,051,024 2,261,959 2,077,260 6,703,372 2,573,768 2,771,969 662,696 - Total Hedging instrument: 14,479,898 2,261,959 2,077,260 6,703,372 2,019,072 932,203 486,032 - Currency and interest rate swaps 2,571,126 - - - 554,696 1,839,766 176,664 - Forwards 17,051,024 2,261,959 2,077,260 6,703,372 2,573,768 2,771,969 662,696 - Total i. Projection of flows by interest rate risk: The estimation of the periods in which the flows are expected to arise is presented below: As of March 31, 2023 More than 5 Between 3 years Between 1 year Between 3 months Between 1 month Up to On Total years and 5 years and 3 years and 1 year and 3 months 1 month demand MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Hedged item - - - - - - - - Inflows (25,192) (3,841) (4,809) (10,186) (4,241) (1,258) (857) - Outflows (25,192) (3,841) (4,809) (10,186) (4,241) (1,258) (857) - Net flows Hedging instrument - - - - - - - - Inflows 25,192 3,841 4,809 10,186 4,241 1,258 857 - Outflows (*) 25,192 3,841 4,809 10,186 4,241 1,258 857 - Net flows (*) Includes only that portion of the hedging instrument's projected cash flows (derivative) used to hedge interest rate risk.

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 12 - FINANCIAL DERIVATIVES CONTRACTS FOR HEDGE ACCOUNTING PURPOSES, continued In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 70 As of December 31, 2022 More than 5 Between 3 years Between 1 year Between 3 months Between 1 month Up to On Total years and 5 years and 3 years and 1 year and 3 months 1 month deman d MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Hedged item 8,894 - - - 4,627 4,267 - - Inflows (26,660) (4,310) (5,063) (10,273) (5,993) (733) (288) - Outflows (17,766) (4,310) (5,063) (10,273) (1,366) 3,534 (288) - Net flows Hedging instrument (8,894) - - - (4,627) (4,267) - - Inflows 26,660 4,310 5,063 10,273 5,993 733 288 - Outflows (*) 17,766 4,310 5,063 10,273 1,366 (3,534) 288 - Net flows (*) Includes only that portion of the hedging instrument's projected cash flows (derivative) used to hedge interest rate risk. ii. Projection of cash flows by inflation risk: As of March 31, 2023 More than 5 Between 3 years Between 1 year Between 3 months Between 1 month Up to On Total years and 5 years and 3 years and 1 year and 3 months 1 month deman d MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Hedged item 2,802,972 597,809 417,355 1,154,854 479,330 104,577 49,047 - Inflows (241,588) (56,537) (55,425) (93,992) (28,038) (1,330) (6,266) - Outflows 2,561,384 541,272 361,930 1,060,862 451,292 103,247 42,781 - Net flows Hedging instrument 241,588 56,537 55,425 93,992 28,038 1,330 6,266 - Inflows (2,802,972) (597,809) (417,355) (1,154,854) (479,330) (104,577) (49,047) - Outflows (2,561,384) (541,272) (361,930) (1,060,862) (451,292) (103,247) (42,781) - Net flows As of December 31, 2022 More than 5 Between 3 years Between 1 year Between 3 months Between 1 month Up to On Total years and 5 years and 3 years and 1 year and 3 months 1 month deman d MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Hedged item 3,214,546 702,610 393,717 1,197,961 397,542 410,507 112,209 - Inflows (259,168) (52,297) (52,368) (98,565) (20,551) (24,505) (10,882) - Outflows 2,955,378 650,313 341,349 1,099,396 376,991 386,002 101,327 - Net flows Hedging instrument 259,168 52,297 52,368 98,565 20,551 24,505 10,882 - Inflows (3,214,546) (702,610) (393,717) (1,197,961) (397,542) (410,507) (112,209) - Outflows (2,955,378) (650,313) (341,349) (1,099,396) (376,991) (386,002) (101,327) - Net flows

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 12 - FINANCIAL DERIVATIVES CONTRACTS FOR HEDGE ACCOUNTING PURPOSES, continued iii. Projection of cash flows by exchange rate risk In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 71 As of March 31, 2023 More than 5 Between 3 years Between 1 year Between 3 months Between 1 month Up to On Total years and 5 years and 3 years and 1 year and 3 months 1 month deman d MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Hedged item - - - - - - - - Inflows (94,336) (1,606) (3,208) (3,648) (78,135) (6,713) (1,026) - Outflows (94,336) (1,606) (3,208) (3,648) (78,135) (6,713) (1,026) - Net flows Hedging instrument - - - - - - - - Inflows 94,336 1,606 3,208 3,648 78,135 6,713 1,026 - Outflows 94,336 1,606 3,208 3,648 78,135 6,713 1,026 - Net flows As of December 31, 2022 More than 5 Between 3 years Between 1 year Between 3 months Between 1 month Up to On Total years and 5 years and 3 years and 1 year and 3 months 1 month deman d MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Hedged item - - - - - - - - Inflows (41,759) (1,606) (3,208) (6,784) (20,192) (4,281) (5,687) - Outflows (41,759) (1,606) (3,208) (6,784) (20,192) (4,281) (5,687) - Net flows Hedging instrument - - - - - - - - Inflows 41,759 1,606 3,208 6,784 20,192 4,281 5,687 - Outflows 41,759 1,606 3,208 6,784 20,192 4,281 5,687 - Net flows

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31 , 2023 , and 2022 , and as of December 31 , 2022 NOTE 12 - FINANCIAL DERIVATIVES CONTRACTS FOR HEDGE ACCOUNTING PURPOSES, continued b. Effect on other comprehensive income The valuation generated by those hedging instruments used in cash flow hedges whose effect was recorded in the Interim Consolidated Statements of Changes in Equity, specifically within 'accumulated other comprehensive income', in cash flow hedges, is presented as follows : In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 72 As of December 31, As of March 31, 2022 2023 Hedged item MCh$ MCh$ (2,343) (2,182) Interbank borrowing - - Time deposits and other term equivalents 415 8,987 Issued debt instruments (22,571) (29,664) Debt instruments at FVOCI (94,339) (174,308) Loans and receivables at amortised cost (118,838) (197,167) Total Considering that the variable flows of both the hedged item and the hedging instrument are mirrors of each other, the hedges are close to 100 % efficient ; This entails that all variations in value attributable to components of the hedged risk are almost fully netted . The Bank did not record any forecasted future transactions in its cash flow hedge accounting portfolio during the period . c. Effect on results The result generated by the cash flow derivatives whose effect was transferred from other comprehensive income into the results for the period is presented below : As of December 31, As of March 31, 2022 2023 Hedged item MCh$ MCh$ (826) 214 Bond hedge derivatives (4,762) (1,174) Interbank loans hedge derivatives (37,698) (9,434) Mortgage loans hedge derivatives (43,286) (10,934) Cash flow hedge net income(*) (*) See Note 28 'Equity', letter f. d. Net investment hedges in foreign operations As of March 31, 2023, and December 31, 2022, the Bank has no net foreign investment hedges in its hedge accounting portfolio.

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 12 - FINANCIAL DERIVATIVES CONTRACTS FOR HEDGE ACCOUNTING PURPOSES, continued e. Fair value macro - hedges The Bank has macro - hedges for loans and accounts receivable from clients, specifically for the mortgage and commercial loan portfolios. The details are presented below: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 73 Notional amount More than 5 Between 3 years Between 1 year Between 3 months Between 1 month Up to On Total years and 5 years and 3 years and 1 year and 3 months 1 month demand As of March 31, 2023 MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Hedged item Loans and receivables at amortised cost: 1,134,951 558,470 - 451,551 124,930 - - - Mortgage loans 900,000 - - 600,000 300,000 - - - Commercial loans 2,034,951 558,470 - 1,051,551 424,930 - - - TOTAL Hedging instrument 1,134,951 558,470 - 451,551 124,930 - - - Currency and interest rate swaps 900,000 - - 600,000 300,000 - - - Interest rate swaps 2,034,951 558,470 - 1,051,551 424,930 - - - TOTAL Notional amount More than 5 Between 3 years Between 1 year Between 3 months Between 1 month Up to On Total years and 5 years and 3 years and 1 year and 3 months 1 month deman d As of December 31, 2022 MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Hedged item Loans and receivables at amortised cost: 1,134,951 558,470 - 576,481 - - - - Mortgage loans 900,000 - - 900,000 - - - - Commercial loans 2,034,951 558,470 - 1,476,481 - - - - TOTAL Hedging instrument 1,134,951 558,470 - 576,481 - - - - Currency and interest rate swaps 900,000 - - 900,000 - - - - Interest rate swaps 2,034,951 558,470 - 1,476,481 - - - - TOTAL As of March 31, 2023, and December 31, 2022, the figures of MCh$184,157 and MCh$160,531, respectively, are presented in 'other assets' for the mark - to - market valuation of the net assets or liabilities hedged in a macro hedge (Note 19). As of March 31, 2023, and December 31, 2022, MCh$123,074 and MCh$85,725, respectively, are presented in 'other liabilities' for the mark - to - market valuation of hedged liabilities in a macro hedge (Note N 27).

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 13 - FINANCIAL ASSETS AT AMORTISED COST The composition and balances as of March 31, 2023, and as of December 31, 2022, of financial assets at amortised cost are as follows: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 74 As of December 31, As of March 31, 2022 2023 MCh$ MCh$ Financial assets at amortised cost Rights under repurchase and securities lending agreements - - Transactions with domestic banks - - Transactions with foreign banks - - Transactions with other entities in the country - - Transactions with other entities abroad - - Accrued impairment on rights under repurchase agreements and securities lending agreements - - Subtotal Debt financial instruments 4,868,485 4,756,840 Instruments of the Chilean Central Bank and Government - - Other financial debt instruments issued in the country - - Financial debt instruments issued abroad (894) (1,100) Accrued impairment on debt financial instruments 4,867,591 4,755,740 Subtotal Interbank loans - - Domestic bank - - Provisions for loans to domestic banks 32,991 32,873 Foreign banks (36) (45) Provisions for loans to foreign banks - - Central Bank of Chile - - Foreign Central Banks 32,955 32,828 Subtotal Credits and receivables from clients 17,684,589 17,507,798 Commercial loans 13,292,397 13,183,832 Commercial loans 1,612,508 1,634,917 Foreign trade loans 132,261 138,695 Current account debtors 132,677 144,062 Credit card debtors 878,390 788,823 Factoring transactions 1,345,977 1,318,772 Commercial leasing transactions 52,833 51,537 Student loans 237,546 247,160 Other loans and accounts receivable 15,729,009 16,029,869 Mortgage loans 1,913 1,437 Mortgage loans with letters of credit 2,238 1,899 Endorsable mortgage loans 87,621 86,988 Mortgage bond - financed loans 15,557,695 15,863,558 Other mutual mortgage loans - - Financial leasing transactions for housing 79,542 75,987 Other loans and accounts receivable 5,282,812 5,340,597 Consumer loans 3,579,360 3,618,765 Consumer loans in instalments 155,656 154,387 Current account debtors 1,544,176 1,563,942 Credit card debtors 2,652 2,525 Consumer finance leasing transactions 968 978 Other loans and accounts receivable (1,036,525) (1,051,418) Provisions established for credit risk

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 (641,014) (632,272) Provisions for commercial loans (106,591) (121,477) Provisions for mortgage loans (288,920) (297,669) Provisions for consumer loans 37,659,885 37,826,846 Subtotal 42,560,431 42,615,414 Total Financial Assets at amortised cost In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 75

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 13 - FINANCIAL ASSETS AT AMORTISED COST, continued a. Rights under repurchase and securities lending agreements As of March 31, 2023, and December 31, 2022, the Bank does not hold any instruments with purchase commitment rights. b. Debt financial instruments As of March 31, 2023, and December 31, 2022, the composition of debt financial instruments is as follows: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 76 As of December 31, As of March 31, 2022 2023 MCh$ MCh$ Instruments of the Chilean Central Bank and Government - - Debt financial instruments of the Central Bank of Chile 4,868,485 4,756,840 Bonds and promissory notes of the Treasury General of the Republic - - Other fiscal debt financial instruments 4,868,485 4,756,840 Subtotal Other financial debt instruments issued in the country - - Debt financial instruments of other banks in the country - - Bonds and bills of exchange of domestic companies - - Other financial debt instruments issued in the country - - Subtotal Financial debt instruments issued abroad - - Foreign Central Bank debt financial instruments - - Financial debt instruments of foreign governments and fiscal entities abroad - - Debt financial instruments of other banks abroad - - Bonds and bills of exchange of companies abroad - - Other financial debt instruments issued abroad - - Subtotal (894) (1,100) Accrued impairment on debt financial instruments (894) (1,100) Subtotal 4,867,591 4,755,740 Total This portfolio has no instruments sold to customers and financial institutions under repurchase agreements. Provisions for credit risk amounted to MCh$1,100 and MCh$894 as of March 31, 2023, and December 31, 2022, respectively.

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 13 - FINANCIAL ASSETS AT AMORTISED COST, continued Analysis of changes in the impairment value as of March 31, 2023, and December 31, 2022, is as follows: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 77 Total Phase 3 Phase 2 Phase 1 MCh$ MCh$ MCh$ 894 - - 894 Balance as of January 1, 2023 228 - - 228 Change in measurement without portfolio reclassifying during the period - - - - Transfer to phase 1 - - - - Transfer to phase 2 - - - - Transfer to phase 3 - - - - New assets originated (22) - - (22) Sale or assignment of credits or maturities - - - - Paid from credits - - - - Other changes in provisions 1,100 - - 1,100 Balance as of March 31, 2023 Total Phase 3 Phase 2 Phase 1 MCh$ MCh$ MCh$ 710 - - 710 Balance as of January 1, 2022 184 - - 184 Change in measurement without portfolio reclassifying during the period - - - - Transfer to phase 1 - - - - Transfer to phase 2 - - - - Transfer to phase 3 - - - - New assets originated - - - - Sale or assignment of credits or maturities - - - - Paid from credits - - - - Other changes in provisions 894 - - 894 As of December 31, 2022

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 13 - FINANCIAL ASSETS AT AMORTISED COST, continued c. Iterbank loans As of March 31, 2023, and December 31, 2022, the detail of amounts owed to banks is as follows: Financial assets before provisions Established provisions countries bank In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 78 countries abroad for derivative transactions banks abroad transactions with a central counterparty transactions with a central counterparty foreign Central Banks Normal Substandard Non - performing Normal Substandard Non - performing portfolio Portfolio portfolio portfolio Portfolio portfolio Net Interbank loans As of March 31, 2023 Evaluation Total financial assets Evaluation Evaluation Evaluation Total Evaluation Evaluation (In MCh$) Individual Individual Individual Individual Individual Individual Banks in the country - - - - - - - - Interbank liquidity loans - - - - - - - - - Commercial interbank loans - - - - - - - - - Current account overdrafts - - - - - - - - - Foreign trade credits Chilean exports - - - - - - - - - Foreign trade credits Chilean imports - - - - - - - - - Foreign trade credits between third - - - - - - - - - Non - transferable deposits in domestic - - - - - - - - - Other loans with domestic banks - Foreign banks - - - - - - - - Interbank liquidity loans - - - - - - - - - Commercial interbank loans - - - - - - - - - Current account overdrafts - 32,828 - - 45 45 - - 32,873 Foreign trade credits Chilean exports 32,873 - - - - - - - - Foreign trade credits Chilean imports - - - - - - - - - Foreign trade credits between third - - - - - - - - - Current account deposits with banks - - - - - - - - - Other non - transferable deposits with - - - - - - - - - Other loans with foreign banks - 32,828 - - 45 45 - - 32,873 Subtotal domestic and foreign banks 32,873 Central Bank of Chile - - - - - - - - Current account deposits for derivatives - - - - - - - - - Other unavailable deposits - - - - - - - - - Other loans - - - - - - - - - Foreign central banks - - - - - - - - - Current account deposits for derivatives - - - - - - - - - Other unavailable deposits - - - - - - - - - Other loans - - - - - - - - - Subtotal Central Bank of Chile and - 32,828 - - 45 45 - - 32,873 TOTAL 32,873

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 13 - FINANCIAL ASSETS AT AMORTISED COST, continued Financial assets before provisions Established provisions countries bank In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 79 countries abroad for derivative transactions transactions with a central counterparty transactions with a central counterparty foreign Central Banks Normal Substandard Non - performing Normal Substandard Non - performing portfolio Portfolio portfolio portfolio Portfolio portfolio Net Interbank loans As of December 31, 2022 Evaluation Total financial assets Evaluation Evaluation Evaluation Total Evaluation Evaluation (In MCh$) Individual Individual Individual Individual Individual Individual Banks in the country - - - - - - - - Interbank liquidity loans - - - - - - - - - Commercial interbank loans - - - - - - - - - Current account overdrafts - - - - - - - - - Foreign trade credits Chilean exports - - - - - - - - - Foreign trade credits Chilean imports - - - - - - - - - Foreign trade credits between third - - - - - - - - - Non - transferable deposits in domestic - - - - - - - - - Other loans with domestic banks - Foreign banks - - - - - - - - Interbank liquidity loans - - - - - - - - - Commercial interbank loans - - - - - - - - - Current account overdrafts - 32,955 - - 36 36 - - 32,991 Foreign trade credits Chilean exports 32,991 - - - - - - - - Foreign trade credits Chilean imports - - - - - - - - - Foreign trade credits between third - - - - - - - - - Current account deposits with banks - - - - - - - - - Other non - transferable deposits with - banks abroad - - - - - - - - Other loans with foreign banks - 32,955 - - 36 36 - - 32,991 Subtotal domestic and foreign banks 32,991 Central Bank of Chile - - - - - - - - Current account deposits for derivatives - - - - - - - - - Other unavailable deposits - - - - - - - - - Other loans - - - - - - - - - Foreign central banks - - - - - - - - - Current account deposits for derivatives - - - - - - - - - Other unavailable deposits - - - - - - - - - Other loans - - - - - - - - - Subtotal Central Bank of Chile and - 32,955 - - 36 36 - - 32,991 TOTAL 32,991

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 13 - FINANCIAL ASSETS AT AMORTISED COST, continued d. Credits and receivables from clients The balances of Loans and receivables from customers as of March 31, 2023, and December 31, 2022, are as follows: Financial assets before provisions Established provisions Subtotal Non - performing portfolio Substandard Portfolio Normal portfolio Total Non - performing portfolio Substandard Portfolio Normal portfolio Loans and receivables As of March 31, 2023 Evaluation Evaluation Evaluation Evaluation Evaluation Evaluation (MCh$) Deductible FOGAPE Covid - 19 guarantees Total Net financial assets Group Individual Individual Group Individual Group Individual Individual Group Individual Commercial loans 12,677,879 505,953 17,596 488,357 165,943 181,204 27,478 60,968 52,764 13,183,832 349,087 580,408 891,251 3,712,884 7,650,202 Commercial loans 838,146 23,062 - 23,062 1,378 7,166 2,293 216 12,009 861,208 1,667 10,484 40,265 7,253 801,539 Foreign trade credits Chilean exports 748,863 23,733 - 23,733 1,436 6,414 2,099 921 12,863 772,596 1,860 12,422 16,934 34,285 707,095 Foreign trade credits Chilean imports 1,097 16 - 16 - - - - 16 1,113 - - - - 1,113 Foreign trade credits between third countries 127,890 10,805 - 10,805 5,500 1,266 1,472 1,267 1,300 138,695 7,442 2,624 14,305 39,209 75,115 Current account debtors 132,772 11,290 - 11,290 6,197 619 422 3,089 963 144,062 8,503 1,183 3,559 91,749 39,068 credit card debtors 775,066 13,757 - 13,757 2,109 2,006 426 850 8,366 788,823 5,048 4,163 11,017 37,426 731,169 Factoring transactions 1,292,121 26,651 37 26,614 6,396 9,759 2,129 4,671 3,659 1,318,772 9,206 70,578 128,840 190,516 919,632 Commercial leasing transactions 47,945 3,592 - 3,592 2,138 - - 1,454 - 51,537 8,990 - - 42,547 - Student loans 233,747 13,413 - 13,413 1,812 7,997 764 2,794 46 247,160 3,580 11,210 3,476 225,281 3,613 Other loans and accounts receivable 16,875,526 632,272 17,633 614,639 192,909 216,431 37,083 76,230 91,986 17,507,798 395,383 693,072 1,109,647 4,381,150 10,928,546 Subtotal Mortgage loans 1,411 26 - 26 23 - - 3 - 1,437 72 - - 1,365 - Loans with mortgage finance 1,820 79 - 79 75 - - 4 - 1,899 199 - - 1,700 - Endorsable mortgage mutual loans 86,568 420 - 420 284 - - 136 - 86,988 2,423 - - 84,565 - Mortgage bond - financed loans 15,744,275 119,283 - 119,283 88,490 - - 30,793 - 15,863,558 494,501 - - 15,369,057 - Other mutual mortgage loans - - - - - - - - - - - - - - - Financial leasing transaction for housing 74,318 1,669 - 1,669 1,461 - - 208 - 75,987 5,073 - - 70,914 - Other loans and accounts receivable 15,908,392 121,477 - 121,477 90,333 - - 31,144 - 16,029,869 502,268 - - 15,527,601 - Subtotal Consumer loans 3,398,578 220,187 - 220,187 101,790 - - 118,397 - 3,618,765 168,868 - - 3,449,897 - Consumer loans in instalments 140,197 14,190 - 14,190 5,656 - - 8,534 - 154,387 7,215 - - 147,172 - Current account debtors 1,501,314 62,628 - 62,628 20,043 - - 42,585 - 1,563,942 25,465 - - 1,538,477 - Credit card debtors 2,478 47 - 47 19 - - 28 - 2,525 24 - - 2,501 - Consumer finance leasing transactions 361 617 - 617 580 - - 37 - 978 745 - - 233 - Other loans and accounts receivable 5,042,928 297,669 - 297,669 128,088 - - 169,581 - 5,340,597 202,317 - - 5,138,280 - Subtotal 37,826,846 1,051,418 17,633 1,033,785 411,330 216,431 37,083 276,955 91,986 38,878,264 1,099,968 693,072 1,109,647 25,047,031 10,928,546 TOTAL In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 80

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 13 - FINANCIAL ASSETS AT AMORTISED COST, continued Financial assets before provisions Established provisions Subtotal Non - performing portfolio Substandard Portfolio Normal portfolio Total Non - performing portfolio Substandard Portfolio Normal portfolio Loans and receivables to customers As of December 31, 2022 Evaluation Evaluation Evaluation Evaluation Evaluation Evaluation (MCh$) Deductible FOGAPE Covid - 19 guarantees Total Net financial assets Group Individual Individual Group Individual Group Individual Individual Group Individual Commercial loans 12,777,274 515,123 19,387 495,736 161,386 184,998 26,801 65,883 56,668 13,292,397 327,078 585,601 885,271 3,866,928 7,627,519 Commercial loans 729,325 23,311 - 23,311 1,432 5,293 3,936 212 12,438 752,636 1,731 7,297 50,006 8,382 685,220 Foreign trade credits Chilean exports 831,442 27,115 - 27,115 1,322 8,549 1,049 1,133 15,062 858,557 1,689 14,476 10,309 41,652 790,431 Foreign trade credits Chilean imports 1,298 17 - 17 - - - - 17 1,315 - - - - 1,315 Foreign trade credits between third countries 122,202 10,059 - 10,059 5,098 1,325 1,209 1,237 1,190 132,261 6,838 2,501 12,368 38,402 72,152 Current account debtors 122,347 10,330 - 10,330 5,610 565 400 3,001 754 132,677 7,679 1,145 3,430 91,021 29,402 credit card debtors 866,529 11,861 - 11,861 1,242 1,827 690 981 7,121 878,390 2,633 3,089 12,170 41,255 819,243 Factoring transactions 1,319,308 26,669 37 26,632 6,778 9,416 2,242 4,429 3,767 1,345,977 9,773 73,144 136,773 203,517 922,770 Commercial leasing transactions 49,283 3,550 - 3,550 2,078 - - 1,472 - 52,833 7,956 - - 44,877 - Student loans 224,567 12,979 - 12,979 1,884 8,116 93 2,833 53 237,546 3,325 11,537 390 218,106 4,188 Other loans and accounts receivable 17,043,575 641,014 19,424 621,590 186,830 220,089 36,420 81,181 97,070 17,684,589 368,702 698,790 1,110,717 4,554,140 10,952,240 Subtotal Mortgage loans 1,882 31 - 31 28 - - 3 - 1,913 104 - - 1,809 - Loans with mortgage finance 2,154 84 - 84 80 - - 4 - 2,238 238 - - 2,000 - Endorsable mortgage mutual loans 87,241 380 - 380 241 - - 139 - 87,621 2,226 - - 85,395 - Mortgage bond - financed loans 15,452,753 104,942 - 104,942 75,640 - - 29,302 - 15,557,695 416,536 - - 15,141,159 - Other mutual mortgage loans - - - - - - - - - - - - - - - Financial leasing transaction for housing 78,388 1,154 - 1,154 1,009 - - 145 - 79,542 2,960 - - 76,582 - Other loans and accounts receivable 15,622,418 106,591 - 106,591 76,998 - - 29,593 - 15,729,009 422,064 - - 15,306,945 - Subtotal Consumer loans 3,362,712 216,648 - 216,648 97,598 - - 119,050 - 3,579,360 150,143 - - 3,429,217 - Consumer loans in instalments 142,147 13,509 - 13,509 5,107 - - 8,402 - 155,656 6,489 - - 149,167 - Current account debtors 1,486,053 58,123 - 58,123 17,536 - - 40,587 - 1,544,176 22,254 - - 1,521,922 - Credit card debtors 2,618 34 - 34 - - - 34 - 2,652 - - - 2,652 - Consumer finance leasing transactions 362 606 - 606 560 - - 46 - 968 707 - - 261 - Other loans and accounts receivable 4,993,892 288,920 - 288,920 120,801 - - 168,119 - 5,282,812 179,593 - - 5,103,219 - Subtotal 37,659,885 1,036,525 19,424 1,017,101 384,629 220,089 36,420 278,893 97,070 38,696,410 970,359 698,790 1,110,717 24,964,304 10,952,240 TOTAL In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 81

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 13 - FINANCIAL ASSETS AT AMORTISED COST, continued e. Contingent loans Contingent loan balances as of March 31, 2023, and December 31, 2022, are as follows: Credit risk exposure from contingent loans As of March 31, 2023 (MCh$) Total Established provisions Total Net contingent credit risk exposure Contingent credit exposure before provisions Substandard Non - performing In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 82 Normal portfolio Evaluation Portfolio Evaluation portfolio Evaluation Normal portfolio Evaluation Substandard Portfolio Evaluation Non - performing portfolio Evaluation Group Individual Individual Group Individual Group Individual Individual Group Individual 645,201 9,020 - 107 6,788 12 654,221 2,113 - 119 18,811 536 634,755 Guarantees and sureties 43,078 420 - - 8 5 43,498 407 - - 70 255 43,173 Letters of credit for goods movement operations - - - - - - - - - - - - - Debt purchase commitments in local currencies abroad 696,711 17,377 650 4,662 2,286 634 714,088 9,145 843 8,123 30,085 26,676 648,361 Transactions related to contingent events 904,110 10,418 3,575 326 193 5,146 914,528 1,178 5,077 989 1,993 721,409 185,060 Immediately repayable unrestricted credit lines - - - - - - - - - - - - - Unrestricted credit lines - - - - - - - - - - - - - Credits for higher studies Law No 20,027 (CAE) 367,738 1,736 - - - 291 369,474 1,445 - - 121,309 20 248,145 Other irrevocable credit commitments - - - - - - - - - - - - - Other contingent credits

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 13 - FINANCIAL ASSETS AT AMORTISED COST, continued Exposure to credit risk from contingent loans As of December 31, 2022 (MCh$) Contingent credit exposure before provisions Total Established provisions Total Net contingent credit risk exposure Normal portfolio Evaluation In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 83 Substandard Portfolio Evaluation Non - performing portfolio Evaluation Normal portfolio Evaluation Substandard Portfolio Evaluation Non - performing portfolio Evaluation operations currencies abroad events credit lines 20,027 (CAE) commitments Group Individual Individual Group Individual Group Individual Individual Group Individual 914,920 9,252 - 115 6,299 13 924,172 2,825 - 127 20,547 615 Guarantees and sureties 902,883 50,758 346 - - 2 6 51,104 338 - - 16 253 Letters of credit for goods movement 50,835 - - - - - - - - - - - - Debt purchase commitments in local - 740,215 17,218 624 3,964 2,387 731 757,433 9,512 775 7,489 29,707 29,963 Transactions related to contingent 689,499 962,354 9,890 2,922 298 185 5,177 972,244 1,308 4,108 848 1,997 729,568 Immediately repayable unrestricted 235,723 - - - - - - - - - - - - Unrestricted credit lines - - - - - - - - - - - - - Credits for higher studies Law No - 342,167 1,263 - - - 210 343,430 1,053 - - - 103,468 Other irrevocable credit 239,962 - - - - - - - - - - - - Other contingent credits -

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 13 - FINANCIAL ASSETS AT AMORTISED COST, continued f. Breakdown of movement in established provisions - Receivable from banks Breakdown of movement in established provisions - Receivable from banks, as of March 31, 2023, and December 31, 2022, is as follows: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 84 l Movement in portfolio provisions for the period Breakdown of movement in provisions established for credit risk portfolio during the period As of March 31, 2023 (MCh$) Individual assessment Non - performing Substandard Normal Tota portfolio Portfolio Portfolio 36 - - 36 Balance as of January 1, 2023 Provision establishment/(release) by: - - - - Change in measurement without portfolio reclassifying during the period: - - - - Change in measurement due to portfolio reclassifying from the beginning to the end of the period [portfolio from ( - ) to (+)]: - - - - Individual Normal to Substandard - - - - Individual Normal to Individual Non - performing - - - - Substandard to Individual Non - performing - - - - Substandard to Individual Normal - - - - Individual Non - performing to Substandard - - - - Individual Non - performing to Individual Normal 47 - - 47 New credits originated - - - - New credits due to translation from contingent to loan - - - - New credits purchased - - - - Sale or assignment of credits (36) - - (36) Paid from credits - - - - Provision application for charge - offs - - - - Recovery of impaired loans (2) - - (2) Exchange rate difference - - - - Other changes in provisions 45 - - 45 Balance as of March 31, 2023 Movement in portfolio provisions for the period Breakdown of movement in provisions established for credit risk portfolio during the period As of December 31, 2022 (MCh$) Individual assessment Non - performing Substandard Normal Total Portfolio Portfolio Portfolio - - - - Balance as of January 1, 2022 Provision establishment/(release) by: - - - - Change in measurement without portfolio reclassifying during the period: - - - - Change in measurement due to portfolio reclassifying from the beginning to the end of the period [portfolio from ( - ) to (+)]: - - - - Individual normal to Substandard - - - - Individual normal to Individual non - performing - - - - Substandard to Individual Non - performing - - - - Substandard to Individual Normal - - - - Individual non - performing to Substandard - - - - Individual non - performing to Individual normal 32 - - 32 New credits originated - - - - New credits due to translation from contingent to loan - - - - New credits purchased - - - - Sale or assignment of credits - - - - Paid from credits - - - - Provision application for charge - offs - - - - Recovery of impaired loans 4 - - 4 Exchange rate difference - - - - Other changes in provisions 36 - - 36 Balance as of December 31, 2022

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 13 - FINANCIAL ASSETS AT AMORTISED COST, continued g. Breakdown of movement in established provisions - Commercial Loans Breakdown of movement in established provisions - Commercial Loans, as of March 31, 2023, and December 31, 2022, is as follows: Breakdown of movement in provisions established for credit risk portfolio during the period As of March 31, 2023 (MCh$) Normal portfolio Evaluation individual group Portfolio Movement in portfolio provisions for the period Non - performing portfolio Substandard Evaluation Subtotal Deductible FOGAPE Covid - 19 guarantees Total individual group during the period: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 85 Group (Normal, Non - compliance) Substandard, Non - compliance) Commercial loans 641,014 19,424 621,590 186,830 220,089 36,420 81,181 Balance as of January 1, 2023 97,070 Provision establishment/(release) by: 61,932 93 61,839 18,867 6,021 5,965 25,964 Change in measurement without portfolio reclassifying 5,022 1,359 119 1,240 - - 3,063 - Change in measurement due to portfolio reclassifying from the beginning to the end of the period [portfolio from ( - ) to (+)] : Individual Normal to Substandard ( 1 , 823 ) (41) - (41) - 14 - - Individual Normal to Individual Non - performing (55) 4,142 1 4,141 - 9,888 (5,747) - Substandard to Individual Non - performing - (631) 20 (651) - - (1,587) - Substandard to Individual Normal 936 (3,213) - (3,213) - (4,334) 1,121 - Individual Non - performing to Substandard - 0 - 0 - - - - Individual Non - performing to Individual Normal - 13,628 194 13,434 23,243 - - (9,809) Group Normal to Group Non - performing - (7,609) 24 (7,633) (8,509) - - 876 Group Non - performing to Group Normal - 759 - 759 - - 33 - Individual (normal, Substandard, Non - performing) to 726 (423) 26 (449) - - 0 (449) Group (Normal, Non - performing) to Individual (Normal, - 107,799 24 107,775 1,929 39,408 9,187 7,137 New credits originated 50,114 722 - 722 11 8 118 389 New credits due to translation from contingent to loan 196 - - - - - - - New credits purchased - - - - - - - - Sale or assignment of credits - (163,582) (2,058) (161,524) (15,795) (47,975) (10,973) (28,937) Paid from credits (57,844) (17,052) - (17,052) (13,765) (3,040) - (247) Provision application for charge - offs - - - - - - - - Recovery of impaired loans - - - - - - - - Changes in models and methodologies - (6,861) - (6,861) (208) (3,758) (506) (19) Exchange rate difference (2,370) 329 (234) 563 306 110 (11) 144 Other changes in provisions 14 632,272 17,633 614,639 192,909 216,431 37,083 76,230 Balance as of March 31, 2023 91,986

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 13 - FINANCIAL ASSETS AT AMORTISED COST, continued Breakdown of movement in provisions established for credit risk portfolio during the period As of December 31, 2022 (MCh$) Normal portfolio Evaluation individual group Portfolio Movement in portfolio provisions for the period Non - performing portfolio Substandard Evaluation Subtotal Deductible FOGAPE Covid - 19 guarantees Total individual group during the period: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 86 (Normal, Non - compliance) Substandard, Non - Compliance) Commercial loans 619,989 30,288 589,701 182,489 187,136 42,815 77,025 Balance as of January 1, 2022 100,236 Provision establishment/(release) by: 253,299 71 253,228 78,427 37,576 19,040 92,049 Change in measurement without portfolio reclassifying 26,136 9,131 880 8,251 - - 18,147 - Change in measurement due to portfolio reclassifying from the beginning to the end of the period [portfolio from ( - ) to (+)] : Individual Normal to Substandard ( 9 , 896 ) 92 - 92 - 202 - - Individual Normal to Individual Non - performing (110) 26,458 11 26,447 - 44,675 (18,228) - Substandard to Individual Non - performing - (2,748) 552 (3,300) - 0 (8,479) - Substandard to Individual Normal 5,179 (1,200) - (1,200) - (2,309) 1,109 - Individual Non - performing to Substandard - (19) - (19) - (36) - - Individual Non - performing to Individual normal 17 37,858 724 37,134 68,623 - - (31,489) Group Normal to Group Non - performing - (37,166) 65 (37,231) (51,455) - - 14,224 Group Non - performing to Group Normal - (1,747) 392 (2,139) - (4,142) 417 - Individual (Normal, Substandard, Non - performing) to Group 1,586 4,886 245 4,641 2,977 - - 1,670 Group (Normal, Non - performing) to Individual (Normal, (6) 469,820 356 469,464 9,762 162,871 34,685 23,977 New credits originated 238,169 2,955 - 2,955 39 53 543 1,408 New credits due to translation from contingent to loan 912 - - - - - - - New credits purchased - (224) - (224) (224) - - - Sale or assignment of credits - (709,631) (14,160) (695,471) (81,568) (197,479) (53,612) (97,169) Paid from credits (265,643) (29,809) - (29,809) (22,552) (6,921) - (336) Provision application for charge - offs - - - - - - - - Recovery of impaired loans - - - - - - - - Changes in models and methodologies - (957) - (957) 84 (1,565) 3 (5) Exchange rate difference 526 27 - 27 228 28 (20) (173) Other changes in provisions (36) 641,014 19,424 621,590 186,830 220,089 36,420 81,181 Balance as of December 31, 2022 97,070

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 13 - FINANCIAL ASSETS AT AMORTISED COST, continued h. Breakdown of movement in established provisions - Mortgage loans The breakdown of movement in established provisions - mortgage loans, as of March 31, 2023, and December 31, 2022, is as follows: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 87 Movement in portfolio provisions for the period Breakdown of movement in provisions established for credit risk portfolio during the period As of March 31, 2023 (MCh$) Group Evaluation Total Non - performing portfolio Normal Portfolio 106,591 76,998 29,593 Mortgage loans Balance as of January 1, 2023 Provision establishment/(release) by: 29,773 16,744 13,029 Change in measurement without portfolio reclassifying during the period: Change in measurement due to portfolio reclassifying from the beginning to the end of the period [portfolio from ( - ) to (+)]: 9,585 11,940 (2,355) Group Normal to Group Non - performing (2,498) (2,835) 337 Group Non - performing to Group Normal 402 142 260 New credits originated - - - New credits purchased - - - Sale or assignment of credits (18,828) (9,222) (9,606) Paid from credits (3,472) (3,430) (42) Provision application for charge - offs - - - Recovery of impaired loans - - - Changes in models and methodologies - - - Exchange rate difference (76) (4) (72) Other changes in provisions 121,477 90,333 31,144 Balance as of March 31, 2023 Movement in portfolio provisions for the period Breakdown of movement in provisions established for credit risk portfolio during the period As of December 31, 2022 (MCh$) Group Evaluation Total Non - performing portfolio Normal Portfolio Mortgage loans 73,961 53,779 20,182 Balance as of January 1, 2022 Provision establishment/(release) by: 102,858 60,453 42,405 Change in measurement without portfolio reclassifying during the period: Change in measurement due to portfolio reclassifying from the beginning to the end of the period [portfolio from ( - ) to (+)]: 17,349 21,596 (4,247) Group Normal to Group Non - performing (12,461) (14,404) 1,943 Group Non - performing to Group Normal 1,341 447 894 New credits originated - - - New credits purchased - - - Sale or assignment of credits (68,089) (37,475) (30,614) Paid from credits (5,479) (5,466) (13) Provision application for charge - offs - - - Recovery of impaired loans - - - Changes in models and methodologies - - - Exchange rate difference (2,889) (1,932) (957) Other changes in provisions 106,591 76,998 29,593 Balance as of December 31, 2022

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 13 - FINANCIAL ASSETS AT AMORTISED COST, continued i. Breakdown of movement of established provisions - Consumer loans Breakdown of movement in established provisions - Consumer loans, as of March 31, 2023, and December 31, 2022, is as follows: Breakdown of movement in provisions established for credit risk portfolio during the period As of March 31, 2023 (MCh$) Movement in portfolio provisions for the period Group Evaluation In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 88 Total Portfolio Non - performing portfolio Consumer loans 288,920 120,801 168,119 Balance as of January 1, 2023 Provision establishment/(release) by: 122,261 32,153 90,108 Change in measurement without portfolio reclassifying during the period: Change in measurement due to portfolio reclassifying from the beginning to the end of the period [portfolio from ( - ) to (+)]: 36,255 56,317 (20,062) Group Normal to Group Non - performing (6,463) (9,648) 3,185 Group Non - performing to Group Normal 27,314 9,320 17,994 New credits originated 3,904 119 3,785 New credits due to translation from contingent to loan - - - New credits purchased - - - Sale or assignment of credits (140,154) (49,415) (90,739) Paid from credits (33,938) (33,360) (578) Provision application for charge - offs - - - Recovery of impaired loans - - - Changes in models and methodologies (46) (1) (45) Exchange rate difference (384) 1,803 (2,187) Other changes in provisions 297,669 128,088 169,581 Balance as of March 31, 2023 Breakdown of movement in provisions established for credit risk portfolio during the period As of December 31, 2022 (MCh$) Movement in portfolio provisions for the period Group Evaluation Total Portfolio Non - performing portfolio Consumer loans 264,819 124,807 140,012 Balance as of January 1, 2022 Provision establishment/(release) by: 386,952 87,518 299,434 Change in measurement without portfolio reclassifying during the period: Change in measurement due to portfolio reclassifying from the beginning to the end of the period [portfolio from ( - ) to (+)]: 100,686 154,567 (53,881) Group Normal to Group Non - performing (22,566) (41,676) 19,110 Group Non - performing to Group Normal 66,622 18,874 47,748 New credits originated 14,816 330 14,486 New credits due to translation from contingent to loan - - - New credits purchased - - - Sale or assignment of credits (478,393) (181,129) (297,264) Paid from credits (43,912) (42,493) (1,419) Provision application for charge - offs - - - Recovery of impaired loans - - - Changes in models and methodologies (4) 3 (7) Exchange rate difference (100) - (100) Other changes in provisions 288,920 120,801 168,119 Balance as of December 31, 2022

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 13 - FINANCIAL ASSETS AT AMORTISED COST, continued j. Breakdown of movement in established provisions - Contingent credits Breakdown of movement in established provisions - Contingent credits, as of March 31, 2023, and December 31, 2022, is as follows: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 89 Movement in portfolio provisions for the period Breakdown of movement in provisions established for credit risk portfolio during the period As of March 31, 2023 (MCh$) Non - performing portfolio Substandard Portfolio Normal portfolio Total Evaluation Evaluation group individual group individual Contingent credit exposure 37,969 3,546 4,377 8,873 6,137 15,036 Balance as of January 1, 2023 Provision establishment/(release) by: 5,444 414 413 1,178 2,276 1,163 Change in measurement without portfolio reclassifying during the period: Change in measurement due to portfolio reclassifying from the beginning to the end of the period [portfolio from ( - ) to (+)]: 175 - - 494 - (319) Individual Normal to Substandard - - 1 - - (1) Individual Normal to Individual Non - performing 498 - 719 (221) - - Substandard to Individual Non - performing (35) - - (98) - 63 Substandard to Individual Normal (2) - (2) - - - Individual Non - performing to Substandard - - - - - - Individual Non - performing to Individual normal 1,933 1,994 - - (61) - Group Normal to Group non - performing (1,051) (1,068) - - 17 - Group Non - performing to Group Normal 36 - - - - 36 Individual (Normal, Substandard, Non - Performing) to Group (Normal, Non - Compliance) (28) - - - (28) - Group (Normal, Non - Performing) to Individual (Normal, Substandard, Non - Compliance) 8,709 977 180 690 978 5,884 New contingent credits granted (14,315) (1,593) (599) (1,176) (3,224) (7,723) Paid from credits 178 26 15 3 126 8 Contingent credits from translation to loans - - - - - - Changes in models and methodologies (967) (88) (15) (470) (130) (264) Exchange rate difference 427 17 7 3 (5) 405 Other changes in provisions 38,971 4,225 5,096 9,276 6,086 14,288 Balance as of March 31, 2023

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 13 - FINANCIAL ASSETS AT AMORTISED COST, continued In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 90 Movement in portfolio provisions for the period Breakdown of movement in provisions established for credit risk portfolio during the period As of December 31, 2022 (MCh$) Non - performing portfolio Substandard Portfolio Normal portfolio Total Evaluation Evaluation group individual group individual Contingent credit exposure 30,801 1,103 2,791 7,905 5,892 13,110 Balance as of January 1, 2022 Provision establishment/(release) by: 17,927 2,024 1,377 830 7,822 5,874 Change in measurement without portfolio reclassifying during the period: Change in measurement due to portfolio reclassifying from the beginning to the end of the period [portfolio from ( - ) to (+)]: 1,815 - - 3,091 - (1,276) Individual Normal to Substandard 15 - 19 0 - (4) Individual Normal to Individual Non - Performing 2,660 - 3,152 (492) - - Substandard to Individual Non - Performing (290) - - (475) - 185 Substandard to Individual Normal 1 - (1) 2 - - Individual Non - Performing to Substandard (61) - (61) - - - Individual Non - Performing to Individual Normal 6,281 6,518 - - (237) - Group Normal to Group Non - Performing (4,436) (4,574) - - 138 - Group Non - Performing to Group Normal (47) - (123) (4) - 80 Individual (Normal, Substandard, Non - Performing) to Group (Normal, Non - Compliance) 87 113 - - (26) - Group (Normal, Non - Performing) to Individual (Normal, Substandard, Non - Compliance) 24,767 2,653 1,288 2,539 3,836 14,451 New contingent credits granted (44,005) (4,546) (4,260) (4,662) (11,798) (18,739) Paid from credits 786 189 27 5 537 28 Contingent credits from translation to loans - - - - - - Changes in models and methodologies (64) 11 (1) 97 (55) (116) Exchange rate difference 1,732 55 169 37 28 1,443 Other changes in provisions 37,969 3,546 4,377 8,873 6,137 15,036 Balance as of December 31, 2022

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 13 - FINANCIAL ASSETS AT AMORTISED COST, continued k. Concentration of credit by economic activity The concentration of credits by economic activity as of March 31, 2023, and December 31, 2022, is as follows: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 91 Established provisions Loans and contingent credit exposures Composition of economic activity for loans, contingent credit exposure and accrued provisions As of March 31, 2023 (MCh$) Loans Loans Total Foreign loans Domestic Loans Total Foreign loans Domestic Loans 45 45 - 32,873 32,873 - Interbank loans Commercial loans 24,783 - 24,783 646,867 - 646,867 Agriculture and livestock 24,388 5 24,383 617,852 2,247 615,605 Fruit growing 9,616 - 9,616 157,184 - 157,184 Forestry 9,940 - 9,940 268,923 - 268,923 Fishing 5,545 - 5,545 204,333 - 204,333 Mining 232 - 232 83,097 465 82,632 Oil and natural gas Product manufacturing industry 16,047 - 16,047 424,032 1 424,031 Food, beverages and tobacco 4,106 3 4,103 78,125 735 77,390 Textile, leather and footwear 2,180 - 2.180 85,236 - 85,236 Wood and furniture 3,600 - 3,600 101,488 - 101,488 Pulp, paper and printing 2,236 - 2,236 144,035 - 144,035 Chemicals and oil products 27,823 - 27,823 572,105 291 571,814 Metallic, non - metallic, machinery, or other 6,698 - 6,698 839,373 - 839,373 Electricity, gas and water 15,754 - 15,754 242,098 - 242,098 Housing construction 38,505 503 38,002 589,924 1,156 588,768 Non - housing construction (office, civil works) 107,647 58 107,589 1,624,179 10,938 1,613,241 Wholesale trade 64,876 6 64,870 1,463,650 1,178 1,462,472 Retail trade, restaurants and hotels 31,938 87 31,851 734,541 39,964 694,577 Transport and storage 5,670 19 5,651 337,939 214 337,725 Telecommunications 7,706 - 7,706 381,804 - 381,804 Financial services - - - - - - Business services 57,389 21 57,368 2,672,429 9,630 2,662,799 Real estate services - - - - - - Student Loans - - - - - - Public administration, defence and police 165,593 93 165,500 5,238,584 2,283 5,236,301 Social and other communal services - - - - - - Personal services 632,272 795 631,477 17,507,798 69,102 17,438,696 Subtotal 121,477 13 121,464 16,029,869 3,521 16,026,348 Mortgage loans 297,669 135 297,534 5,340,597 1,602 5,338,995 Consumer loans 38,971 61 38,910 2,695,809 30,686 2,665,123 Contingent credit exposure

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 13 - FINANCIAL ASSETS AT AMORTISED COST, continued In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 92 Established provisions Loans and contingent credit exposures Composition of economic activity for loans and advances, contingent credit exposure and provisions As of December 31, 2022 (MCh$) Loans Loans Total Foreign loans Domestic Loans Total Foreign loans Domestic Loans 36 36 - 32,991 32,991 - Interbank loans Commercial loans 25,405 - 25,405 655,149 - 655,149 Agriculture and livestock 24,721 6 24,715 630,566 2,663 627,903 Fruit growing 9,712 - 9,712 170,756 6 170,750 Forestry 10,393 - 10,393 284,398 - 284,398 Fishing 5,210 - 5,210 260,454 - 260,454 Mining 228 - 228 88,734 471 88,263 Oil and natural gas Product manufacturing industry 15,051 - 15,051 377,443 - 377,443 Food, beverages and tobacco 4,085 3 4,082 83,400 946 82,454 Textile, leather and footwear 2,697 - 2,697 85,965 - 85,965 Wood and furniture 3,983 - 3,983 65,825 6 65,819 Pulp, paper and printing 2,118 - 2,118 153,930 1 153,929 Chemicals and oil products 29,345 17 29,328 599,405 397 599,008 Metallic, non - metallic, machinery, or other 4,924 - 4,924 901,777 - 901,777 Electricity, gas and water 15,653 - 15,653 239,530 - 239,530 Housing construction 42,003 1,077 40,926 629,271 1,203 628,068 Non - housing construction (office, civil works) 108,511 82 108,429 1,676,944 11,636 1,665,308 Wholesale trade 68,435 6 68,429 1,542,652 1,953 1,540,699 Retail trade, restaurants and hotels 34,715 95 34,620 775,559 43,288 732,271 Transport and storage 5,604 23 5,581 358,032 271 357,761 Telecommunications 8,017 - 8,017 348,807 - 348,807 Financial services - - - - - - Business services 59,576 22 59,554 2,629,783 9,960 2,619,823 Real estate services - - - - - - Student Loans - - - - - - Public administration, defence and police 160,628 77 160,551 5,126,209 2,093 5,124,116 Social and other communal services - - - - - - Personal services 641,014 1,408 639,606 17,684,589 74,894 17,609,695 Subtotal 106,591 12 106,579 15,729,009 3,102 15,725,907 Mortgage loans 288,920 138 288,782 5,282,812 1,549 5,281,263 Consumer loans 37,969 423 37,546 3,048,383 254,812 2,793,571 Contingent credit exposure

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 13 - FINANCIAL ASSETS AT AMORTISED COST, continued l. Housing loans and their provisions by the range of outstanding loan principal over the value of the mortgage collateral (LTV) and days past due, respectively: Mortgage loans and their provisions as of March 31, 2023, and December 31, 2022, are as follows: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 93 Provisions established for Mortgage Loans (MCh$) Mortgage loans (MCh$) As of March 31, 2023 Loan / Guarantee Value (%) Days past due at the end of the period Days past due at the end of the period Total >= 90 60 to 89 30 to 59 1 to 29 0 Total >= 90 60 to 89 30 to 59 1 to 29 0 10,104 6,322 111 1,189 112 2,370 1,389,795 19,294 2,474 30,595 7,575 1,329,857 LTV <= 40% 97,549 50,791 630 12,686 581 32,861 12,742,346 183,089 11,339 304,252 34,350 12,209,316 40% < LTV <= 80% 11,431 3,925 - 1,788 - 5,718 1,724,495 19,942 - 35,630 - 1,668,923 80% < LTV <= 90% 2,393 1,261 2 193 14 923 173,233 3,991 11 4,020 151 165,060 LTV > 90% 121,477 62,299 743 15,856 707 41,872 16,029,869 226,316 13,824 374,497 42,076 15,373,156 Total Provisions established for Mortgage Loans (MCh$) Mortgage loans (MCh$) As of December 31, 2022 Loan / Guarantee Value (%) Days past due at the end of the period Days past due at the end of the period Total >= 90 60 to 89 30 to 59 1 to 29 0 Total >= 90 60 to 89 30 to 59 1 to 29 0 9,412 5,980 668 654 104 2,006 1,341,827 18,078 13,303 20,337 7,234 1,282,875 LTV <= 40% 86,127 43,531 7,990 7,692 603 26,311 12,446,237 157,753 135,462 219,522 38,214 11,895,286 40% < LTV <= 80% 9,263 2,194 931 1,177 29 4,932 1,763,168 12,884 13,532 28,085 142 1,708,525 80% < LTV <= 90% 1,789 861 70 145 2 711 177,777 2,406 1,403 3,407 100 170,461 LTV > 90% 106,591 52,566 9,659 9,668 738 33,960 15,729,009 191,121 163,700 271,351 45,690 15,057,147 Total

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 13 - FINANCIAL ASSETS AT AMORTISED COST, continued m. Dues from banks and commercial loans and their provisions established by classification category The concentration dues from banks and commercial loans, alongside their provisions by classification category as of March 31, 2023, and December 31, 2022, are as follows: Concentration of dues from banks and commercial loans and their provisions by classification category as of March 31, 2023 (in MCh$) Interbank loans and commercial loans payable to the bank Evaluation Individual Total Deductible provision for FOGAPE Covid - 19 guarantees Portfolio portfolio Subtotal C6 C5 C4 C3 C2 C1 Subtotal B4 B3 B2 B1 Subtotal A6 A5 A4 A1 A2 A3 Interbank loans - - - - - - - - - - - - - - - - - - - - - - - Interbank liquidity loans - - - - - - - - - - - - - - - - - - - - - - - - - Commercial interbank loans - - - - - - - - - - - - - - - - - - - - - - - - - Current account overdrafts - - Group Normal portfolio Substandard Portfolio Non - performing portfolio Total Normal Non - performing Total Foreign trade credits Chilean exports 14,802 - 18,071 - - - 32,873 - - - - - - - - - - - - 32,873 - - - 32,873 - imports third countries banks exports imports third countries receivable - - - - - - - - - - - - - - - - - - - - - - - - Foreign trade credits Chilean - - - - - - - - - - - - - - - - - - - - - - - - - Foreign trade credits between - - - - - - - - - - - - - - - - - - - - - - - - - Non - transferable deposits with - - - - - - - - - - - - - - - - - - - - - - - - - Other loans with banks - - 32,873 - - - 32,873 - - - - - - - - - - - - 32,873 - - - 18,071 - Subtotal 14,802 - 45 - - - 45 - - - - - - - - - - - - 45 - - - 40 - Established provisions 5 - 0.14% - - - 0.14% - - - - - - - - - - - - 0.14% - - - 0.22% - % Established provisions 0.04% Commercial loans 17,596 13,183,850 4,134,108 350,723 3,783,385 9,049,742 580,407 64,460 75,756 97,655 92,445 84,653 165,438 891,248 115,361 59,012 160,247 556,628 7,578,087 1,546,286 2,069,234 1,844,529 1,485,564 629,580 Commercial loans 2,894 - 861,188 8,920 1,667 7,253 852,268 10,484 6,822 493 1,690 - - 1,479 40,265 503 251 10,149 29,362 801,519 87,974 190,337 257,780 204,204 61,224 Foreign trade credits Chilean - - 772,596 36,145 1,860 34,285 736,451 12,423 2,984 948 7,463 346 337 345 16,934 1,163 452 416 14,903 707,094 75,127 245,802 199,847 172,771 13,547 Foreign trade credits Chilean - - 1,114 - - - 1,114 - - - - - - - - - - - - 1,114 735 274 105 - - Foreign trade credits between - - 138,694 46,651 7,442 39,209 92,043 2,623 811 529 311 97 325 550 14,306 372 525 1,159 12,250 75,114 11,147 10,335 24,706 28,797 129 Debtors with current accounts - - 144,075 100,252 8,503 91,749 43,823 1,184 365 302 159 78 71 209 3,559 196 102 627 2,634 39,080 6,395 11,727 10,977 9,094 887 Credit card debtors - - 788,825 42,474 5,048 37,426 746,351 4,163 1,132 845 790 409 - 987 11,017 - - 11 11,006 731,171 66,991 66,600 124,856 339,212 130,280 Factoring transactions 3,232 37 1,318,771 199,722 9,206 190,516 1,119,049 70,577 584 2,699 7,990 7,067 18,391 33,846 128,840 9,669 12,859 30,113 76,199 919,632 243,255 283,275 266,487 107,742 15,581 Commercial leasing transactions 3,292 - 51,537 51,537 8,990 42,547 - - - - - - - - - - - - - - - - - - - Student loans - - 247,148 228,861 3,580 225,281 18,287 11,211 6,912 1,669 1,596 100 124 810 3,476 392 39 2,867 178 3,600 412 702 822 709 651 Other loans and accounts 304 17,633 17,507,798 4,848,670 397,019 4,451,651 12,659,128 693,072 84,070 83,241 117,654 100,542 103,901 203,664 1,109,645 127,656 73,240 205,589 703,160 10,856,411 2,038,322 2,878,286 2,730,109 2,348,093 851,879 Subtotal 9,722 17,633 614,639 269,139 192,909 76,230 345,500 216,431 75,663 54,107 47,062 25,136 10,390 4,073 37,083 9,893 2,757 7,512 16,921 91,986 32,921 34,685 18,111 5,671 596 Established provisions 2 % Established provisions 0.02% 0.07% 0.24% 0.66% 1.21% 1.62% 0.85% 2.41% 3.65% 3.76% 7.75% 3.34% 2.00% 10.00% 25.00% 40.00% 65.00% 90.00% 31.23% 2.73% 1.71% 48.59% 5.55% 3.51% 100.00% In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 94

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 13 - FINANCIAL ASSETS AT AMORTISED COST, continued Concentration of dues from banks and commercial loans and their provisions by classification category as of December 31, 2022 (in MCh$) Interbank loans and commercial loans payable to the bank Evaluation Individual Total Deductible provision for FOGAPE Covid - 19 guarantees Group Normal portfolio Substandard Portfolio Non - performing portfolio Total Normal Non - performing Total A1 A2 A3 A4 A5 A6 Subtotal B1 B2 B3 B4 Subtotal C1 C2 C3 C4 C5 C6 Subtotal portfolio Portfolio Interbank loans exports imports third countries banks receivable - - - - - - - - - - - - - - - - - - - - - - - - Interbank liquidity loans - - - - - - - - - - - - - - - - - - - - - - - - - Commercial interbank loans - - - - - - - - - - - - - - - - - - - - - - - - - Current account overdrafts - 32,991 - - - - 32,991 - - - - - - - - - - - - 32,991 - - - 13,442 - Foreign trade credits Chilean 19,569 - - - - - - - - - - - - - - - - - - - - - - - - Foreign trade credits Chilean - - - - - - - - - - - - - - - - - - - - - - - - - Foreign trade credits between - - - - - - - - - - - - - - - - - - - - - - - - - Non - transferable deposits with - - - - - - - - - - - - - - - - - - - - - - - - - Other loans with banks - 32,991 - - - - 32,991 - - - - - - - - - - - - 32,991 - - - 13,442 - Subtotal 19,569 36 - - - - 36 - - - - - - - - - - - - 36 - - - 29 - Established provisions 7 0.22% - - - - 0.22% - - - - - - - - - - - - 0.22% - - - 0.22% - % Established provisions - Commercial loans 13,292,423 19,387 4,194,006 327,078 3,866,928 9,098,417 585,614 68,464 75,360 98,204 89,665 95,253 158,668 885,270 93,486 59,031 150,839 581,914 7,627,533 1,640,787 2,040,348 1,904,953 1,408,971 629,535 Commercial loans 2,939 752,501 - 10,113 1,731 8,382 742,388 7,297 4,308 1,657 821 - - 511 50,006 2,975 267 5,187 41,577 685,085 83,809 186,829 253,647 160,800 - Foreign trade credits Chilean - exports 858,557 - 43,341 1,689 41,652 815,216 14,475 5,120 1,007 7,995 353 - - 10,309 266 90 922 9,031 790,432 88,008 246,159 225,215 213,055 17,995 Foreign trade credits Chilean - imports 1,314 - - - - 1,314 - - - - - - - - - - - - 1,314 946 289 79 - - Foreign trade credits between - third countries 132,261 - 45,240 6,838 38,402 87,021 2,501 834 610 284 83 375 315 12,368 412 543 649 10,764 72,152 11,108 9,402 16,817 22,015 12,810 Debtors with current accounts - 132,679 - 98,700 7,679 91,021 33,979 1,144 325 282 145 70 92 230 3,430 153 32 693 2,552 29,405 6,075 7,448 10,887 4,149 846 Credit card debtors - 878,389 - 43,888 2,633 41,255 834,501 3,089 1,184 726 591 179 - 409 12,170 45 - 372 11,753 819,242 58,652 54,842 105,664 429,607 157,111 Factoring transactions 13,366 1,345,978 37 213,290 9,773 203,517 1,132,688 73,145 193 2,441 9,952 4,383 18,196 37,980 136,773 7,305 15,034 32,915 81,519 922,770 251,778 278,646 262,531 109,418 16,307 Commercial leasing transactions 4,090 52,833 - 52,833 7,956 44,877 - - - - - - - - - - - - - - - - - - - Student loans - 237,654 - 221,431 3,325 218,106 16,223 11,525 6,336 2,652 1,587 95 36 819 391 177 5 17 192 4,307 527 1,260 861 920 582 Other loans and accounts 157 17,684,589 19,424 4,922,842 368,702 4,554,140 12,761,747 698,790 86,764 84,735 119,579 94,828 113,952 198,932 1,110,717 104,819 75,002 191,594 739,302 10,952,240 2,141,690 2,825,223 2,780,654 2,348,935 835,186 Subtotal 20,552 621,590 19,424 268,011 186,830 81,181 353,579 220,089 78,098 55,078 47,832 23,707 11,395 3,979 36,420 8,460 3,001 6,049 18,910 97,070 38,453 33,264 19,123 5,651 573 Established provisions 6 % Established provisions 0.03% 0.07% 0.24% 0.69% 1.18% 1.80% 0.89% 2.56% 3.16% 4.00% 8.07% 3.28% 2.00% 10.00% 25.00% 40.00% 65.00% 90.01% 31.50% 2.77% 1.78% 50.67% 5.44% 3.51% 100.00% In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 95

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 13 - FINANCIAL ASSETS AT AMORTISED COST, continued n. Loans and their established provisions by the number of days past due The concentration of credit risk by days past due as of March 31, 2023, and December 31, 2022, is as follows: Concentration of credit risk by days past due As of March 31, 2023 guarantees Group Individual Individual Group Individual Group Individual Individual Group Individual (MCh$) Interbank loans 32,828 45 - 45 - - - - 45 32,873 - - - - 32,873 0 days - - - - - - - - - - - - - - - 1 to 29 days - - - - - - - - - - - - - - - 30 to 59 days - - - - - - - - - - - - - - - 60 to 89 days - - - - - - - - - - - - - - - > = 90 days 32,828 45 - 45 - - - - 45 32,873 - - - - 32,873 Subtotal Commercial loans 16,319,817 315,536 16,604 298,932 32,782 87,386 30,609 56,268 91,887 16,635,353 82,654 362,623 1,052,183 4,301,903 10,835,990 0 days 126,000 22,121 263 21,858 2,013 13,156 2,458 4,175 56 148,121 4,792 46,493 32,269 47,340 17,227 1 to 29 days 142,602 36,102 146 35,956 17,238 5,188 896 12,591 43 178,704 45,374 27,111 16,146 86,880 3,193 30 to 59 days 47,196 30,570 105 30,465 4,743 19,406 3,120 3,196 - 77,766 12,019 41,171 9,047 15,528 1 60 to 89 days 239,911 227,943 515 227,428 136,133 91,295 - - - 467,854 252,180 215,674 - - - > = 90 days 16,875,526 632,272 17,633 614,639 192,909 216,431 37,083 76,230 91,986 17,507,798 397,019 693,072 1,109,645 4,451,651 10,856,411 Subtotal Mortgage loans 15,331,287 41,870 - 41,870 16,510 - - 25,360 - 15,373,157 161,712 - - 15,211,445 - 0 days 41,368 707 - 707 417 - - 290 - 42,075 4,493 - - 37,582 - 1 to 29 days 358,640 15,857 - 15,857 10,529 - - 5,328 - 374,497 103,648 - - 270,849 - 30 to 59 days 13,080 744 - 744 578 - - 166 - 13,824 6,099 - - 7,725 - 60 to 89 days 164,017 62,299 - 62,299 62,299 - - - - 226,316 226,316 - - - - > = 90 days 15,908,392 121,477 - 121,477 90,333 - - 31,144 - 16,029,869 502,268 - - 15,527,601 - Subtotal Consumer loans 4,803,152 154,353 - 154,353 29,409 - - 124,944 - 4,957,505 56,521 - - 4,900,984 - 0 days 104,260 27,284 - 27,284 7,540 - - 19,744 - 131,544 13,101 - - 118,443 - 1 to 29 days 71,293 25,451 - 25,451 9,494 - - 15,957 - 96,744 16,529 - - 80,215 - 30 to 59 days 37,758 20,734 - 20,734 11,798 - - 8,936 - 58,492 19,854 - - 38,638 - 60 to 89 days 26,465 69,847 - 69,847 69,847 - - - - 96,312 96,312 - - - - > = 90 days 5,042,928 297,669 - 297,669 128,088 - - 169,581 - 5,340,597 202,317 - - 5,138,280 - Subtotal 37,859,674 1,051,463 17,633 1,033,830 411,330 216,431 37,083 276,955 92,031 38,911,137 1,101,604 693,072 1,109,645 25,117,532 10,889,284 Total loans Total Total Net financial assets Contingent credit exposure before provisions Substandard In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 96 Established provisions Substandard Normal portfolio Evaluation Portfolio Evaluation Non - performing portfolio Evaluation Normal portfolio Evaluation Portfolio Evaluation Non - performing portfolio Evaluation Subtotal Deductible FOGAPE Covid - 19

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 13 - FINANCIAL ASSETS AT AMORTISED COST, continued Concentration of credit risk by days past due As of December 31, 2022 guarantees Group Individual Individual Group Individual Group Individual Individual Group Individual (MCh$) 32,955 - - 36 - - - - 36 32,991 - - - - 32,991 Interbank loans 0 days - - - - - - - - - - - - - - - 1 to 29 days - - - - - - - - - - - - - - - 30 to 59 days - - - - - - - - - - - - - - - 60 to 89 days - - - - - - - - - - - - - - - > = 90 days 32,955 - - 36 - - - - 36 32,991 - - - - 32,991 Subtotal Commercial loans 16,545,403 310,235 18,497 291,738 25,999 76,792 32,928 59,045 96,974 16,855,638 64,842 391,285 1,069,098 4,389,406 10,941,007 0 days 103,493 14,266 262 14,004 2,881 5,532 1,068 4,459 64 117,759 6,749 27,001 19,480 54,270 10,259 1 to 29 days 121,023 32,677 124 32,553 11,147 9,486 1,983 9,905 32 153,700 27,136 39,430 13,627 72,542 965 30 to 59 days 79,798 46,591 111 46,480 15,005 23,262 441 7,772 - 126,389 38,835 41,111 8,512 37,922 9 60 to 89 days 193,858 237,245 430 236,815 131,798 105,017 - - - 431,103 231,140 199,963 - - - > = 90 days 17,043,575 641,014 19,424 621,590 186,830 220,089 36,420 81,181 97,070 17,684,589 368,702 698,790 1,110,717 4,554,140 10,952,240 Subtotal Mortgage loans 15,024,150 32,307 - 32,307 10,895 - - 21,412 - 15,056,457 104,904 - - 14,951,553 - 0 days 45,630 748 - 748 428 - - 320 - 46,378 4,307 - - 42,071 - 1 to 29 days 261,381 9,971 - 9,971 5,580 - - 4,391 - 271,352 52,970 - - 218,382 - 30 to 59 days 153,719 9,982 - 9,982 7,529 - - 2,453 - 163,701 68,762 - - 94,939 - 60 to 89 days 137,538 53,583 - 53,583 52,566 - - 1,017 - 191,121 191,121 - - - - > = 90 days 15,622,418 106,591 - 106,591 76,998 - - 29,593 - 15,729,009 422,064 - - 15,306,945 - Subtotal Consumer loans 4,761,533 151,192 - 151,192 28,344 - - 122,848 - 4,912,725 47,959 - - 4,864,766 - 0 days 112,212 30,200 - 30,200 8,467 - - 21,733 - 142,412 13,325 - - 129,087 - 1 to 29 days 63,132 24,215 - 24,215 9,645 - - 14,570 - 87,347 15,397 - - 71,950 - 30 to 59 days 34,751 20,159 - 20,159 11,191 - - 8,968 - 54,910 17,494 - - 37,416 - 60 to 89 days 22,264 63,154 - 63,154 63,154 - - - - 85,418 85,418 - - - - > = 90 days 4,993,892 288,920 - 288,920 120,801 - - 168,119 - 5,282,812 179,593 - - 5,103,219 - Subtotal 37,692,840 1,036,561 19,424 1,017,137 384,629 220,089 36,420 278,893 97,106 38,729,401 970,359 698,790 1,110,717 24,964,304 10,985,231 Total loans Total Total Net financial assets Contingent credit exposure before provisions Substandard In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 97 Normal portfolio Evaluation Portfolio Evaluation Non - performing portfolio Evaluation Established provisions Substandard Portfolio Evaluation Normal portfolio Evaluation Non - performing portfolio Evaluation Subtotal Deductible FOGAPE Covid - 19

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 14 - INVESTMENTS IN ASSOCIATES AND OTHER COMPANIES The Interim Consolidated Statements of Financial Position include investments in companies of MCh$47,952 and MCh$46,586 as of March 31, 2023, and December 31, 2022, as follows: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 98 Investment Investment value Institutions' Participation As of December 31, As of March 31, As of December 31, As of March 31, 2022 2023 2022 2023 MCh$ MCh$ % % Companies 5,172 5,483 33.33 33.33 Centro de Compensación Automatizado SA 1,949 2,015 29.29 29.29 Sociedad Interbancaria de Depósito de Valores SA 1,110 1,129 15.00 15.00 Cámara de Compensación de Alto Valor SA 3,169 3,299 20.00 20.00 Administrador Financiero del Transantiago SA 1,682 1,717 12.48 12.48 Servicios de Infraestructura de Mercado OTC SA 3,800 3,941 33.43 33.43 Redbanc SA 27,732 28,550 25.00 25.00 Transbank SA 44,614 46,134 Subtotal Minority investments 1,964 1,816 Trading Exchanges 8 2 Other 1,972 1,818 Subtotal 46,586 47,952 Total The equity investments have been irrevocably designated at fair value through other comprehensive income and are therefore carried at the market value per IFRS 9 Financial Instruments. a. Summary of financial information of associates as of March 31, 2023 and December 31, 2022: As of December 31, As of March 31, 2022 2023 Profit (loss) Capital Liabilitie s Assets Profit (loss) Capital Liabilities Assets MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ 4,702 10,345 4,295 19,342 950 14,935 3,786 19,671 Centro de Compensación Automatizado 1,508 5,746 463 7,717 229 7,250 454 7,933 Sociedad Interbancaria de Depósito de Valores SA 930 6,423 1,004 8,357 135 7,304 1,017 8,456 Cámara de Compensación de Alto Valor SA 4,021 16,604 40,113 60,738 650 20,431 43,012 64,093 Administrador Financiero del Transantiago SA 3 13,210 3,418 16,631 320 13,093 19,632 33,045 Servicios de Infraestructura de Mercado OTC SA 1,711 9,657 19,150 30,518 443 11,345 18,982 30,770 Redbanc SA 26,031 84,898 1,387,278 1,498,207 3,054 109,508 1,398,056 1,510,618 Transbank SA 38,906 146,883 1,455,72 1 1,641,510 5,779 183,865 1,484,941 1,674,585 Total

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 14 - INVESTMENTS IN ASSOCIATES AND OTHER COMPANIES, continued b. Restrictions on the ability of partners to transfer funds to investors. There are no significant restrictions on the ability of associates to transfer funds to the Bank in the form of cash dividends or repayment of loans or advances. c. The movement in investments in companies is as follows: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 99 As of December 31, As of March 31, 2022 2023 MCh$ MCh$ 37,695 46,586 Initial book value - - Acquisition of investments - - Sale of investments 10,310 1,542 Participation in income 526 - Dividends received (1,945) (176) Other equity adjustments (*) 46,586 47,952 Total (*) This corresponds to the market value of the investments in other companies in the country as indicated in the Compendium of Accounting Standards for Banks. d. The objective evidence indicated in IAS 28 ‘Investments in Associates and Joint Ventures’ has been evaluated, and no impairment of the Bank's investments has been detected.

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 15 - INTANGIBLE ASSETS The composition of the item as of March 31, 2023, and December 31, 2022, is as follows: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 100 As of March 31, 2023 Net balance Accumulated amortisation Gross balance Opening net balance January 1, 2023 MCh$ MCh$ MCh$ MCh$ 102,176 (256,802) 358,978 107,789 Software or computer programmes 102,176 (256,802) 358,978 107,789 Total As of December 31, 2022 Net balance Accumulated amortisation Gross balance Opening net balance January 1, 2022 MCh$ MCh$ MCh$ MCh$ 107,789 (243,520) 351,309 95,411 Software or computer programmes 107,789 (243,520) 351,309 95,411 Total a. The movement in intangible assets during the periods of March 31, 2023, and December 31, 2022, is as follows: i. Gross balance Software Development Computer Programmes Gross balances MCh$ 351,309 Balance as of January 1, 2023 7,669 Additions - Disposals - Impairment - Other 358,978 Balance as of March 31, 2023 294,745 Balances as of January 1, 2022 54,899 Additions (145) Disposals (*) - Impairment 1,810 Other 351,309 Balance as of December 31, 2022 (*) This corresponds to fully amortised assets.

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 15 - INTANGIBLE ASSETS, continued ii. Accumulated amortisation In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 101 Software Development Computer Programmes Accumulated amortisation MCh$ (243,520) Balance as of January 1, 2023 (13,282) Amortisation for the year - Withdrawals/disposals - Other (256,802) Balance as of March 31, 2023 (199,334) Balances as of January 1, 2022 (42,377) Amortisation for the year - Withdrawals/disposals (*) (1,809) Other (243,520) Balance as of December 31, 2022 (*) This corresponds to fully amortised assets. The Bank has no restrictions on intangibles as of March 31 , 2023 , and December 31 , 2022 . Furthermore, intangible assets have not been pledged as security for fulfilling obligations . On the other hand, no amounts are due from the Bank for intangible assets on the same dates .

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 16 - FIXED ASSETS The composition of the items as of March 31, 2023, and December 31, 2022, is as follows: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 102 As of March 31, 2023 Balance Accumulated depreciation Balance Opening net balance net gross January 1, 2023 MCh$ MCh$ MCh$ MCh$ 92,400 (83,517) 175,917 97,067 Buildings 15,012 - 15,012 15,022 Land 49,314 (254,354) 303,668 46,883 Equipment 28,981 (71,989) 100,970 30,392 Other 185,707 (409,860) 595,567 189,364 Total As of December 31, 2022 Balance Accumulated depreciation Balance Opening net balance net gross January 1, 2022 MCh$ MCh$ MCh$ MCh$ 97,067 (81,987) 179,054 98,081 Buildings 15,022 - 15,022 15,479 Land 46,883 (247,789) 294,672 56,174 Equipment 30,392 (70,494) 100,886 20,556 Other 189,364 (400,270) 589,634 190,290 Total a. The movement in fixed assets on March 31, 2023, and December 31, 2022, is as follows: i. Gross balance Total Other Equipment Land Buildings 2023 MCh$ MCh$ MCh$ MCh$ MCh$ 589,634 100,886 294,672 15,022 179,054 Balance as of January 1, 2023 7,526 3,100 2,219 - 2,207 Additions (2,200) (793) (175) (10) (1,222) Other changes 607 (2,223) 6,952 - (4,122) Other 595,567 100,970 303,668 15,012 175,917 Balance as of March 31, 2023 . Total Other Equipment Land Buildings 2022 MCh$ MCh$ MCh$ MCh$ MCh$ 547,930 83,783 276,826 15,479 171,842 Balances as of January 1, 2022 43,531 16,762 14,941 - 11,828 Additions (4,827) (2,139) (410) (457) (1,821) Other changes 3,000 2,480 3,315 - (2,795) Other 589,634 100,886 294,672 15,022 179,054 Balance as of December 31, 2022

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 16 - FIXED ASSETS, continued ii. Accumulated depreciation In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 103 Total Other Equipment Land Buildings 2023 MCh$ MCh$ MCh$ MCh$ MCh$ (400,270) (70,494) (247,789) - (81,987) Balance as of January 1, 2023 (11,361) (2,264) (6,704) - (2,393) Depreciation charges for the period 1,788 769 139 - 880 Disposals and sales for the period (17) - - - (17) Other (409,860) (714,989) (254,354) - (83,517) Balance as of March 31, 2023 Total Other Equipment Land Buildings 2022 MCh$ MCh$ MCh$ MCh$ MCh$ (357,639) (63,226) (220,652) - (73,761) Balances as of January 1, 2022 (46,519) (9,318) (27,498) - (9,703) Depreciation charges for the year 3,888 2,050 361 - 1,477 Disposals and sales for the year - - - - - Other (400,270) (70,494) (247,789) - (81,987) Balance as of December 31, 2022 b. The Bank has no restrictions on fixed assets as of March 31, 2023, and December 31, 2022. Furthermore, fixed assets have not been pledged as collateral to fulfil obligations. On the other hand, no amounts are owed on fixed assets by the Bank on the same dates.

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 17 - RIGHT OF USE ASSETS AND OBLIGATION FOR LEASE CONTRACT The composition of the right - to - use lease assets as of March 31, 2023, and December 31, 2022, is as follows: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 104 As of March 31, 2023 Balance Accumulated depreciation Balance Opening net balance net gross January 1, 2023 MCh$ MCh$ MCh$ MCh$ 129,466 (103,412) 232,878 133,795 Buildings 45,973 (84,926) 130,899 48,731 Leasehold improvements 175,439 (188,338) 363,777 182,526 Total As of December 31, 2022 Balance Accumulated depreciation Balance Opening net balance net gross January 1, 2022 MCh$ MCh$ MCh$ MCh$ 133,795 (97,808) 231,603 137,879 Buildings 48,731 (83,577) 132,308 46,649 Leasehold improvements 182,526 (181,385) 363,911 184,528 Total a. The movement in the right - to - use lease assets as of March 31, 2023, and December 31, 2022, is as follows: i. Gross balance Total Leasehold improvements Buildings 2023 MCh$ MCh$ MCh$ 363,911 132,308 231,603 Balance as of January 1, 2023 8,977 1,261 7,716 Additions (8,504) (2,063) (6,441) Other changes (607) (607) - Other 363,777 130,899 232,878 Balance as of March 31, 2023 Total Leasehold improvements Buildings 2022 MCh$ MCh$ MCh$ 346,756 134,310 212,446 Balances as of January 1, 2022 46,069 14,862 31,207 Additions (25,913) (13,863) (12,050) Other changes (3,001) (3,001) - Other 363,911 132,308 231,603 Balance as of December 31, 2022

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 17 - RIGHT OF USE ASSETS AND OBLIGATION FOR LEASE CONTRACT, continued ii. Accumulated depreciation In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 105 Total Leasehold improvements Buildings 2023 MCh$ MCh$ MCh$ (181,385) (83,577) (97,808) Balance as of January 1, 2023 (11,404) (3,407) (7,997) Depreciation charges for the period 4,433 2,040 2,393 Disposals and sales for the period 18 18 - Other (188,338) (84,926) (103,412) Balance as of March 31, 2023 Total Leasehold improvements Buildings 2022 MCh$ MCh$ MCh$ (162,228) (87,661) (74,567) Balances as of January 1, 2022 (41,097) (9,778) (31,319) Depreciation charges for the period 21,940 13,862 8,078 Disposals and sales for the period - - - Other (181,385) (83,577) (97,808) Balance as of December 31, 2022 b. Obligations under leasing contracts As of March 31, 2023, and December 31, 2022, the lease obligations are as follows: As of December 31, As of March 31, 2022 2023 MCh$ MCh$ 137,089 132,939 Obligations under leasing contracts 137,089 132,939 Total c. Expenditure related to leasehold assets and lease obligations: ( As of March 31, 2022 2023 MCh$ MCh$ (9,997) (11,404) Depreciation (664) (778) Interests (840) (1,895) Short - term leasing 11,501) (14,077) Total

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 17 - RIGHT OF USE ASSETS AND OBLIGATION FOR LEASE CONTRACT, continued d. As of March 31, 2023, and December 31, 2022, the maturity level of lease obligations, according to their contractual maturity, is as follows: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 106 As of 31 December As of March 31, 2022 2023 MCh$ MCh$ 25,902 25,664 Due within 1 year 24,862 24,835 Due after 1 to 2 years 22,093 21,670 Due after 2 to 3 years 19,565 18,976 Due after 3 to 4 years 13,220 12,491 Due after 4 to 5 years 31,447 29,303 Due after 5 years 137,089 132,939 Total e. Operating Leases - Lessor As of March 31, 2023, and December 31, 2022, the future minimum rents to be received from non - cancellable operating leases are as follows: As of December 31, As of March 31, 2022 2023 MCh$ MCh$ 1,090 1,029 Due within 1 year 1,805 1,443 Due after 1 to 2 years 582 522 Due after 2 to 3 years 475 463 Due after 3 to 4 years 470 458 Due after 4 to 5 years 1,194 1,045 Due after 5 years 5,616 4,960 Total f. As of March 31 , 2023 , and December 31 , 2022 , the Bank has no finance lease contracts that cannot be unilaterally terminated . g. The Bank has no restrictions on fixed assets as of March 31 , 2023 , and December 31 , 2022 . Furthermore, fixed assets have not been pledged as collateral to fulfil obligations . On the other hand, no amounts are owed on fixed assets by the Bank on the same dates .

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 18 - CURRENT AND DEFERRED TAXES a. Current taxes As of March 31, 2023, and December 31, 2022, the Bank has set up a first - category income tax provision based on the tax provisions in force. This provision is presented net of payments and credits as follows: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 107 b. Results for taxes The effect of the tax expense for the periods from January 1 to March 31, 2023, and 2022, consists of the following items: As of March 31, 2022 2023 MCh$ MCh$ Income tax expense 4,421 (5,539) Current year tax Deferred tax credits (charges) 46,504 24,990 Origination and reversal of temporary differences 50,925 19,451 Subtotal 57 114 Tax on rejected expenses Article No 21 128 (1,727) Other 51,110 17,838 Net income tax expense As of December 31, As of March 31, 2022 2023 MCh$ MCh$ Breakdown of current tax liabilities (assets) (315) (51) (Assets) for current taxes 112,481 98,597 Current tax liabilities 112,166 98,546 Total net taxes payable (recoverable) Details of current tax liabilities (assets) (net) 147,668 142,128 Income tax (27%) Minus: (33,021) (41,027) Monthly provisional payments (2,039) (2,039) Credit for training expenses (1,160) (1,339) Grant credits 718 823 Other 112,166 98,546 Total taxes payable (recoverable)

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 18 - CURRENT AND DEFERRED TAXES continued c. Reconciliation of the effective tax rate The reconciliation between the income tax rate and the effective tax rate applied in determining the tax expense as of March 31, 2023, and 2022, is shown below. In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 108 As of March 31, 2022 2023 Amount Tax rate Amount Tax rate MCh$ % MCh$ % 78,520 27.00 42,559 27.00 Tax calculated on the profit before taxes (30,354) (10.58) (17,170) (10.89) Permanent differences (*) 57 0.02 114 0.07 Single tax (disallowed expenditure) 2,887 1.38 (7,665) (4.86) Other 51,110 17.82 17,838 11.32 Effective rate and income tax expense (*) Corresponds mainly to permanent differences arising from the Price - Level Restatement of Tax Equity. d. Effect of deferred taxes on equity The breakdown of the deferred tax effect in equity is presented below separately, showing the corresponding asset and liability balances for the periods ended March 31, 2023, and December 31, 2022: As of December 31, As of March 31, 2022 2023 MCh$ MCh$ Deferred tax assets (OCI) 76,512 51,251 Financial investment instruments 35,689 53,235 Cash flow hedging 112,201 104,486 Total deferred tax assets with effect in other comprehensive income Deferred tax liabilities (46,976) (22,837) Financial investment instruments (3,603) - Cash flow hedging (50,579) (22,837) Total deferred tax liabilities with effect on others comprehensive income 61,622 81,649 Net deferred tax balances in equity 61,821 81,457 Deferred taxes in equity attributable to equity holders of the bank (199) 192 Deferred tax in equity attributable to non - controlling interests

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31 , 2023 , and 2022 , and as of December 31 , 2022 NOTE 18 - CURRENT AND DEFERRED TAXES, continued e. Effect of deferred taxes on income During the years 2023 , and as of December 31 , 2022 , the Bank has recorded the effects of deferred taxes in its Interim Consolidated Financial Statements . Below are the effects of deferred taxes on assets, liabilities and income allocated due to temporary differences : In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 109 f. Breakdown of deferred taxes Below is a breakdown of deferred taxes, considering their effect on equity and results. As of December 31, As of March 31, 2022 2023 MCh$ MCh$ Deferred tax assets 112,201 104,486 With an effect on other comprehensive income 578,650 571,851 With an effect on income 690,851 676,337 Total deferred tax assets Deferred tax liabilities (50,579) (22,837) With an effect on other comprehensive income (326,148) (344,339) With an effect on income (376,727) (367,176) Total deferred tax liabilities As of December 31, As of March 31, 2022 2023 MCh$ MCh$ Deferred tax assets 17,670 18,431 Interest and readjustments 29,613 33,285 Extraordinary charge - off 3,777 3,721 Goods received in payment - 5,309 Exchange rate adjustments 4,708 5,073 Valuation of fixed assets 322,194 321,871 Provision for loan losses 89,713 78,122 Provision for expenses 50 105 Derivatives 95,152 61,223 Leased assets 5,570 9,264 Subsidiaries tax loss 887 35,447 Right of use assets 9,316 - Other 578,650 571,851 Total deferred tax assets Deferred tax liabilities (423) (17,384) Valuation of investments - - Valuation of fixed assets (7,285) (6,975) Anticipated expenses (3,147) (3,167) Valuation provision (289,352) (264,476) Derivatives - (35,412) Lease obligations (8,779) - Exchange rate adjustments (17,162) (16,925) Other (326,148) (344,339) Total deferred tax liabilities

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 18 - CURRENT AND DEFERRED TAXES, continued g. Presentation of taxes in the financial statements At the date of these Interim Consolidated Financial Statements, taxes are presented as follows: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 110 As of December 31, As of March 31, Deferred taxes 2022 2023 MCh$ MCh$ 690,851 676,337 Deferred tax assets before reclassifying (376,726) (367,175) Reclassifying (netting) 314,125 309,162 Deferred tax asset after reclassifying (376,727) (367,176) Deferred tax liabilities before reclassifying 376,726 (367,175) Reclassifying (netting) (1) (1) Deferred tax liabilities after reclassifying As of December 31, As of March 31, Current taxes 2022 2023 MCh$ MCh$ 36,514 44,700 Current tax asset before reclassifying (36,199) (44,649) Reclassifying (netting) 315 51 Current tax asset after reclassifying (148,680) (143,246) Current tax liabilities before reclassifying 36,199 44,649 Reclassifying (netting) (112,481) (98,597) Current tax liabilities after reclassifying

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31 , 2023 , and 2022 , and as of December 31 , 2022 NOTE 18 - CURRENT AND DEFERRED TAXES, continued h. Complementary information related to Circular No 47 of 2009 issued by the Internal Tax Service and the FMC For disclosure and crediting of provisions and write - offs, banks must include in the tax note to their Interim Consolidated Financial Statements a detail of the movements and effects generated by the application of article 31 , No 4 of the Income Tax Law (LIR), as set out in the document annexed to the joint circular . i. Loans and Receivables In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 111 As of December 31, As of March 31, 2022 2023 Assets at tax value Assets at tax value Overdue portfolio Overdue portfolio No guarantee Guarantee Total Assets at financial value No guarantee Guarantee Total Assets at financial value MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ - - 32,991 32,991 - - 32,873 32,873 Interbank loans 124,060 139,671 15,497,269 15,460,222 140,570 127,773 15,918,876 15,867,623 Commercial loans 11,088 813 5,283,192 5,280,160 9,942 674 4,600,013 4,508,120 Consumer loans 459 36,228 15,754,421 15,729,010 452 40,110 16,057,528 16,029,868 Mortgage loans 135,607 176,712 36,567,873 36,502,383 150,964 168,557 36,609,290 36,438,484 Total ii. Provision on the overdue portfolio without guarantees Balance as of 31 - 03 - 2023 Released provisions Established provisions Provisions charge - offs Balance as of 01 - 01 - 2023 MCh$ MCh$ MCh$ MCh$ MCh$ 140,570 (273,762) 370,630 (80,358) 124,060 Commercial loans 9,942 (42,338) 183,402 (142,210) 11,088 Consumer loans 452 (33,361) 35,681 (2,327) 459 Mortgage loans 150,964 (349,461) 589,713 (224,895) 135,607 Total Balance as of 31 - 12 - 2022 Released provisions Established provisions Provisions charge - offs Balance as of 01 - 01 - 2022 MCh$ MCh$ MCh$ MCh$ MCh$ 124,060 (276,426) 367,317 (81,357) 114,526 Commercial loans 11,088 (37,469) 185,919 (143,574) 6,212 Consumer loans 459 (33,040) 35,391 (2,317) 425 Mortgage loans 135,607 (346,935) 588,627 (227,248) 121,163 Total

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 18 - CURRENT AND DEFERRED TAXES, continued iii. Direct charge - offs and recoveries In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 112 As of December 31, As of March 31, 2022 2023 MCh$ MCh$ (44,347) (39,663) Direct Charge - offs Art 31 No 4, paragraph III - - Condonations that originated liberation of provisions 87,520 19,289 Recoveries or renegotiations of impaired loans 43,173 (20,374) Total iv. Application Article 31 No 4 paragraphs I and IV As of December 31, As of March 31, 2022 2023 MCh$ MCh$ - - Charge - offs under paragraph I (4,186) (916) Charge - offs under paragraph IV (4,186) (916) Total

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 19 - OTHER ASSETS The composition of the item 'other assets' as of March 31, 2023, and December 31, 2022, is as follows: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 113 As of December 31, As of March 31, 2022 2023 MCh$ MCh$ Other assets 32,220 47,133 Assets to be leased out as lessor (1) 2,442,325 2,993,244 Cash guarantees provided for derivative financial transactions (2) 243,345 103,223 Debtors due to financial instrument intermediation 184,989 184,109 Accounts receivable from third parties 44,180 40,609 VAT tax credit receivable 245,937 237,752 Expenses paid in advance (3) 160,531 184,157 Valuation adjustments for macro hedges (4) 542 - Assets to support defined benefit post - employment plan obligations 715 715 Investment in gold 2 2 Other cash guarantees provided 31,709 37,399 Pending operations 191,509 225,035 Other assets 3,578,004 4,053,378 Total 1) This corresponds to assets available to be provided through finance leases. 2) This corresponds to guarantees related to certain derivative contracts. These guarantees operate when the valuation of derivatives exceeds thresholds defined in the respective contracts and may be in favour of or against the Bank. 3) In this item, the Bank has recorded in advance the expense paid concerning the Santander LATAM Pass programme, which will naturally be consumed as our customers use the Bank's transactional products and are therefore assigned the corresponding LATAM Pass miles (loyalty programme administered by LATAM Airlines Group SA). 4) Corresponds to the balances of the mark - to - market valuation of net assets or liabilities hedged in a macro hedge (Note 12).

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 20 - NON - CURRENT ASSETS AND DISPOSAL GROUPS HELD FOR SALE AND LIABILITIES INCLUDED IN DISPOSAL GROUPS HELD FOR SALE The composition of non - current assets and disposal group and liabilities included in disposal groups as of March 31, 2023, and December 31, 2022, is as follows: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 114 As of December 31, As of March 31, 2022 2023 MCh$ MCh$ Assets received in payment or awarded in a judicial auction (1) 4,772 5,365 Goods received in payment 22,573 21,127 Assets awarded in a judicial auction (1,182) (950) Provisions for assets received in lieu of payment or awarded in a judicial auction Non - current assets held for sale 4,736 3,858 Assets for the recovery of goods sold under financial leasing operations - - Disposal group for sale 30,899 29,40 0 Total 1 ) Goods received in payment are those received in lieu of overdue debts from customers . The aggregate assets held in this way must not exceed 20 % of the Bank's effective assets . Currently, these assets represent 0 . 08 % ( 0 . 12 % as of December 31 , 2022 ) of the Bank's effective equity . Goods awarded in a judicial auction correspond to those awarded in judicial auctions as repayment of debts previously contracted with the Bank . Assets awarded in a judicial auction are not subject to the above . These immovable properties are assets available for sale . For most assets, the sale is expected to be completed within one year from the asset's reception or acquisition . If such property is not sold within the time frame in the regulation, it must be written off . Furthermore, a provision is recorded for the difference between the higher initial award value plus any additions and its estimated realisable value (appraisal) . .

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 21 - FINANCIAL LIABILITIES HELD FOR TRADING AT FAIR VALUE THROUGH PROFIT OR LOSS Financial liabilities at fair value through profit or loss comprise the liabilities held for trading. They are classified in this category because they are acquired to sell in the short term. Financial liabilities held for trading and derivatives that are financial liabilities are measured at fair value, in which gains and losses are taken to the income statement. As of March 31, 2023, and December 31, 2022, the Bank holds the following portfolio of financial liabilities held for trading at fair value through profit or loss: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 115 Fair value Liabilities As of December 31, As of March 31, 2022 2023 MCh$ MCh$ Financial derivatives contracts 1,818,024 1,995,767 Forwards 9,497,035 9,128,317 Swaps 2,794 767 Call options 1,467 1,561 Put options - - Future - - Other 11,319,320 11,126,412 Subtotal Other financial instruments - - Deposits and other demand liabilities - - Time deposits and other term equivalents - - Issued debt instruments - - Other derivatives - - Subtotal 11,319,320 11,126,412 Total Banco Santander presents financial liabilities for trading at fair value through profit or loss corresponding to financial derivative contracts, specifically forwards and swaps, which hedge the exchange rate and interest rate risk related to future obligations.

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 21 - FINANCIAL LIABILITIES HELD FOR TRADING AT FAIR VALUE THROUGH PROFIT OR LOSS, continued The following is a breakdown of the financial derivatives contracted by the Bank as of March 31, 2023, and December 31, 2022, their fair value and the breakdown by the maturity of the notional or contractual values: March 31, 2023 Notional Total More than Between 3 years years Between 1 year years Between 3 months year Between 1 month months Up to On Fair value 5 years 1 month demand MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Financial derivatives contracts 1,995,767 43,513,166 2,014,213 1,872,504 3,617,999 16,045,547 7,120,580 12,842,323 - Currency forwards 3,337,420 97,547,657 14,602,955 11,040,417 27,398,088 31,921,128 8,068,220 4,516,849 - Interest rate swaps 5,790,897 54,468,253 20,248,808 9,947,732 16,891,603 5,926,421 1,003,383 450,306 - Currency and interest rate swaps 767 53,007 - - - 4,846 3,257 44,904 - Currency call options - - - - - - - - - Call interest rate options 1,561 77,079 - - 3,972 16,403 5,640 51,064 - Put currency options - - - - - - - - - Put interest rate options - - - - - - - - - Interest rate futures - - - - - - - - - Other derivatives 11,126,412 195,659,162 36,865,976 22,860,653 47,911,662 53,914,345 16,201,080 17,905,446 - Total December 31, 2022 Notional Total More than Between 3 years and 5 years Between 1 year and 3 years Between 3 months and 1 year Between 1 month and 3 months Up to On Fair value 5 years 1 month demand MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Financial derivatives contracts 1,818,024 36,837,620 2,034,929 1,913,113 4,725,547 10,559,457 7,474,471 10,130,103 - Currency forwards 3,935,401 91,376,587 15,274,620 11,344,275 25,470,384 26,018,228 9,226,258 4,042,822 - Interest rate swaps 5,561,634 56,659,463 20,229,246 10,879,098 18,051,948 5,192,387 1,580,644 726,140 - Currency and interest rate swaps 2,794 371,101 - - - 10,365 70,941 289,795 - Currency call options - - - - - - - - - Call interest rate options 1,467 107,015 - - - 27,612 11,304 68,099 - Put currency options - - - - - - - - - Put interest rate options - - - - - - - - - Interest rate futures - - - - - - - - - Other derivatives 11,319,320 185,351,786 37,538,795 24,136,486 48,247,879 41,808,049 18,363,618 15,256,959 - Total In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 116

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 22 - FINANCIAL LIABILITIES AT AMORTISED COST As of March 31, 2023, and December 31, 2022, the composition of financial liabilities at amortised cost is as follows: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 117 As of December 31, As of March 31, 2022 2023 MCh$ MCh$ Deposits and other demand liabilities 11,711,969 11,449,060 Current accounts 630,807 561,006 Demand deposit accounts 379,331 332,267 Other demand deposits 6,758 6,357 Obligations for payment card provisioning accounts 1,357,361 1,457,823 Other liabilities on demand 14,086,226 13,806,513 Subtotal Time deposits and other term equivalents 12,779,206 14,068,560 Time deposits 191,257 188,835 Term savings accounts 8,327 8,435 Other term credit balances 12,978,790 14,265,830 Subtotal Obligations under repurchase and securities lending agreements - - Transactions with domestic banks 103,425 302,326 Transactions with foreign banks 211,930 154,092 Transactions with other entities in the country - - Transactions with other entities abroad 315,355 456,418 Subtotal Interbank borrowing 41,317 40,995 Banks in the country 3,239,358 3,104,039 Foreign banks 5,584,090 5,650,383 Central Bank of Chile 8,864,765 8,795,417 Subtotal Debt financial instruments issued 3,798 2,831 Letters of Credit 7,080,472 7,334,176 Senior bonds 81,623 78,767 Mortgage bonds 7,165,893 7,415,774 Subtotal Other financial liabilities - - Other financial obligations to the public sector 292,417 313,105 Other financial obligations in the country 578 495 Other financial obligations abroad 292,995 313,600 Subtotal 43,704,024 45,053,552 Total

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 22 - FINANCIAL LIABILITIES AT AMORTISED COST, continued a. Obligations under repurchase and securities lending agreements As of March 31, 2023, and as of December 31, 2022, the obligations associated with the instruments sold under repurchase agreements are as follows: In teri m C on s oli d ate d Fi n anci al Sta te me n t Marc h 20 23 / B an c o San ta n de r C hil e 118 As of December 31, 2022 As of March 31, 2023 Total Betwee n 1 month and 3 months Up to 1 month On - deman d Total More than 1 month up to 3 month s Up to 1 month On - demand MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Transactions with domestic banks - - - - - - - - Repurchase agreements with other banks - - - - - - - - Repurchase agreements with the Central Bank of Chile - - - - - - - - Securities lending obligations - - - - - - - - Subtotal Transactions with foreign banks 103,42 5 - 103,425 - 302,326 - 302,326 - Repurchase agreements with other banks - - - - - - - - Repurchase agreements with foreign central banks - - - - - - - - Securities lending obligations 103,42 5 - 103,42 5 - 302,32 6 - 302,32 6 - Subtotal Transactions with other entities in the country 211,93 0 109 211,821 - 154,09 2 111 153,981 - Repurchase agreements - - - - - - - - Securities lending obligations 211,93 0 109 211,82 1 - 154,09 2 111 153,98 1 - Subtotal Transactions with other entities abroad - - - - - - - - Repurchase agreements - - - - - - - - Securities lending obligations - - - - - - - - Subtotal 315,35 5 109 315,24 6 - 456,41 8 111 456,30 7 - Total

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 22 - FINANCIAL LIABILITIES AT AMORTISED COST, continued b. Interbank borrowing At the end of the Interim Consolidated Financial Statements as of March 31, 2023, and December 31, 2022, the composition of the item "Interbank Borrowings" is as follows: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 119 As of December 31, As of March 31, 2022 2023 MCh$ MCh$ Loans obtained from financial institutions and the Central Bank of Chile 5,584,084 5,650,383 Other liabilities with the Central Bank of Chile 5,584,084 5,650,383 Subtotal 41,318 40,995 Loans from domestic financial institutions Loans from foreign financial institutions 0 1,021,381 Citibank NA 100,654 315,021 State Bank of India 42,479 314,872 Wells Fargo Bank NA 2,313,126 304,164 Bank of America 42,524 199,723 Sumitomo Mitsui Banking Corporation 110,225 196,121 Standard Chartered Bank 199,225 187,273 The Bank of Nova Scotia 169,584 158,657 The Bank of New York Mellon 0 86,465 The Toronto Dominion Bank 84,978 79,907 Barclays Bank Plc London 0 78,566 Corporacion Andina De Fomento 58,326 62,140 Banco Santander Hong Kong 42,650 40,232 Zurcher Kantonalbank 11,410 24,406 Wachovia Bank NA 19,633 11,092 Banco Santander Singapur 0 7,782 Taishin International Bank Co 7,359 6,872 Banco Santander Brasil 0 3,135 J P Morgan Chase New York 2,521 1,569 Hong Kong and Shanghai Banking 0 801 Hsbc Bank Plc, Panama 243 472 Kbc Bank Nv 114 392 Agricultural Bank of China 86 292 Bbva Bancomer 124 286 Intesa Sanpaolo 104 270 Banco Santander Central Hispano 2,540 257 Bank of China 0 252 The Industrial And Commercial 195 210 Hua Nan Commercial Bank 0 205 Rhb Bank Berhad 0 179 Banco de Sabadell, SA 1,146 171 China Merchants Bank 0 153 Industrial And Commercial Bank 230 87 Korea Exchange Bank 0 83 Deustche Bank Frankfurt 386 76 Bank of Taiwan 0 63 Bank of Communications 58 51 Shinhan Bank 101 49 China Construction Bank 71 48 Banco Itau Bba SA 110 48 Fortis Bank 73 41 Taiwan Cooperative Bank 0 37 United Bank of India 0 37 Turkiye Cumhuriyeti Ziraat Ban 70 36 Turkiye Garanti Bankasi 0 32 Icici Bank Limited 901 24 Industrial Bank of Korea 0 9 Citic Industrial Bank 25,349 - Commerzbank Ag 1,164 - Bank of Tokyo Mitsubishi 394 - Shanghai Pudong Development Bank 233 - Banca Nazionale Del Lavoro 219 - Unicredit 198 - Bbva Uruguay

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 181 - Bank for Foreign Trade of Vietnam 90 - Credit Agricole Italia 80 - Caixabank 67 - Banco Do Brasil 56 - Banco Bilbao Vizcaya Argentaria 36 - Abn Amro Bank NV 32 - Kotak Mahindra Bank Limited 3,239,345 3,104,039 Subtotal 18 - Bank of Galicia and Buenos Aires 3,239,363 3,104,039 Subtotal 8,864,765 8,795,417 Total In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 120

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31 , 2023 , and 2022 , and as of December 31 , 2022 NOTE 22 - FINANCIAL LIABILITIES AT AMORTISED COST, continued c. Obligations to the Central Bank of Chile As part of the Central Bank of Chile's measures to address the shocks impacting the Chilean economy due to the current Covid - 19 pandemic, the Credit Facility Conditional to Incremental Flexibility (FCIC) programme was announced . This corresponds to a unique financial facility open to banks, allowing them to continue funding households and companies' loans . The Bank must leave collateral for these operations, which include : the Central Bank of Chile, the government and private bonds (bank and corporate) and, more recently, commercial credits from the individual assessment portfolio classified as high credit quality . FCIC resources can also be accessed through the Liquidity Line of Credit (LCL), capped at the local currency reserve requirement . The FCIC consists of an initial facility and an additional one . The first amounts to US $ 4 , 800 million . The additional line can reach four times the initial one, that is, US $ 19 , 200 million . Its availability depends on two factors : growth of the base portfolio and targeting loans to smaller companies . Furthermore, the Central Bank created the FCIC 2 for US $ 16 , 000 million . The maturity of these obligations is as follows : In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 121 As of December 31, As of March 31, 2022 2023 MCh$ MCh$ - - Due within 1 year 5,584,090 5,650,383 Due after 1 to 2 years - - Due after 2 to 3 years - - Due after 3 to 4 years - - Due after 5 years 5,584,090 5,650,383 Total liabilities to the Central Bank of Chile d. Loans from domestic financial institutions The maturity of these obligations is as follows: As of December 31, As of March 31, 2022 2023 MCh$ MCh$ 41,317 40,995 Due within 1 year - - Due after 1 to 2 years - - Due after 2 to 3 years - - Due after 3 to 4 years - - Due after 5 years 41,317 40,995 Total loans from domestic financial institutions

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 22 - FINANCIAL LIABILITIES AT AMORTISED COST, continued e. Obligations abroad In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 122 As of December 31, As of March 31, 2022 2023 MCh$ MCh$ 3,239,358 3,104,039 Due within 1 year - - Due after 1 to 2 years - - Due after 2 to 3 years - - Due after 3 to 4 years - - Due after 5 years 3,239,358 3,104,039 Total loans from foreign financial institutions f. Issued Financial Debt Instruments and Other Financial Obligations Debts classified as short - term constitute obligations on demand or those which will mature in one year or less. All other debts are classified as long - term. The details are as follows: As of March 31, 2023 Total Long - term Short - term MCh$ MCh$ MCh$ 2,831 686 2,145 Letters of credit 7,334,176 6,494,667 839,509 Senior bonds 78,767 69,281 9,486 Mortgage bonds 7,415,774 5,564,634 851,140 Issued debt instruments 313,600 217 313,383 Other financial liabilities 7,729,374 6,564,851 1,164,523 Total As of December 31, 2022 Total Long - term Short - term MCh$ MCh$ MCh$ 3,798 1,206 2,592 Letters of credit 7,080,472 6,597,776 482,696 Senior bonds 81,623 74,515 7,108 Mortgage bonds 7,165,893 6,673,497 492,396 Issued debt instruments 292,995 239 292,756 Other financial liabilities 7,458,888 6,673,736 785,152 Total

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 22 - FINANCIAL LIABILITIES AT AMORTISED COST, continued g. Mortgage bills These bills are used to finance mortgage loans. The principal amounts of these are amortised quarterly. The bills are indexed to the UF and yield an interest rate of 5.20% as of March 31, 2023 (5.20% as of December 31, 2022). In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 123 As of December 31, As of March 31, 2022 2023 MCh$ MCh$ 2,592 2,145 Due within 1 year 1,039 662 Due after 1 to 2 years 167 24 Due after 2 to 3 years - Due after 3 to 4 years - - Due after 4 to 5 years - - Due after 5 years 3,798 2,831 Total mortgage bills h. Senior bonds The details of senior bonds by currency are as follows: As of December 31, As of March 31, 2022 2023 MCh$ MCh$ 3,510,708 3,470,315 Santander Bonds in UF 2,215,515 2,276,570 Santander Bonds in US$ 644,780 614,408 Santander Bonds in CHF$ 223,467 515,331 Santander Bonds in Ch$ 122,611 113,842 Current bonds in AUD$ 203,512 190,503 Senior bonds in JPY$ 159,879 153,207 Senior bonds in EUR$ 7,080,472 7,334,176 Total senior bonds

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 22 - FINANCIAL LIABILITIES AT AMORTISED COST, continued 1. Placement of senior bonds: During 2023, the Bank has placed bonds for UF 3,001,110,000 and CLP 180,340,000,000,000 as follows: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 124 During 2022 the Bank has placed bonds for UF 29,326,000, US$ 30,000,000 and CLP 347,000,000,000 and JPY 3,000,000,000 as follows: 2. Repurchase of senior bonds The bank has made the following partial bond repurchases during the quarter of 2023: Maturity Date Issue Amount Placement Date Issue Date Issuance rate Annual Term (years) Amount placed Currency Series 01 - 09 - 27 3,000,000,000 09 - 01 - 23 01 - 03 - 22 1.55 5,5 years 3,000,000,000 UF U7 01 - 06 - 26 800,000 21 - 02 - 23 01 - 12 - 18 1.60 7,5 years 800,000 UF W3 01 - 03 - 28 310,000 19 - 01 - 23 01 - 03 - 19 1.80 9 years 310,000 UF W5 3,001,110,000 3,001,110,000 Total UF 01 - 08 - 26 55,340,000,000 24 - 02 - 23 24 - 02 - 23 6.80 3,5 years 55,340,000,000 CLP AA7 01 - 12 - 28 25,000,000,000 13 - 03 - 23 13 - 03 - 23 6.60 6,0 years 25,000,000,000 CLP AA1 01 - 09 - 30 100,000,000,000 16 - 03 - 23 16 - 03 - 23 6.20 8,0 years 100,000,000,000 CLP AA3 180,340,000,000 180,340,000,000 Total (CLP) Maturity Date Issue Amount Placement Date Issue Date Issuance rate Annual Term (years) Amount placed Currenc y Series 01 - 01 - 30 5,000,000 16 - 06 - 22 01 - 01 - 19 1.55 11 years 5,000,000 UF T3 01 - 06 - 26 2,116,000 30 - 06 - 22 01 - 12 - 18 1.60 7,5 years 2,116,000 UF W3 01 - 03 - 28 1,210,000 30 - 06 - 22 01 - 03 - 19 1.80 9 years 1,210,000 UF W5 01 - 06 - 32 3,000,000 28 - 07 - 22 01 - 12 - 21 2.80 11,5 years 3,000,000 UF U2 01 - 06 - 29 3,000,000 09 - 08 - 22 01 - 12 - 21 2.50 7,5 years 3,000,000 UF U1 01 - 02 - 34 5,000,000 24 - 10 - 22 21 - 10 - 22 2.65 11,5 years 5,000,000 UF T20 01 - 12 - 33 8,000,000 09 - 12 - 22 07 - 12 - 22 2.65 10,5 years 8,000,000 UF W4 01 - 06 - 31 2,000,000 27 - 07 - 22 01 - 12 - 21 2.70 9,5 years 2,000,000 UF W9 29,326,000 29,326,000 Total UF 28 - 04 - 25 30,000,000 28 - 04 - 22 20 - 04 - 22 Sofr + 95pb 3 years 30,000,000 US$ Bond US$ 30,000,000 30,000,000 Total US$ 01 - 04 - 26 64,800,000,000 16 - 06 - 22 01 - 10 - 20 2.95 5,5 years 64,800,000,000 CLP U6 01 - 04 - 25 100,000,000,00 0 29 - 06 - 22 01 - 10 - 20 2.70 4,5 years 100,000,000,000 CLP U5 01 - 04 - 26 35,200,000,000 21 - 10 - 22 20 - 10 - 22 2.95 5,5 years 35,200,000,000 CLP U6 01 - 04 - 26 72,000,000,000 16 - 11 - 22 15 - 11 - 22 7 5,5 years 72,000,000,000 CLP U7 01 - 08 - 22 75,000,000,000 22 - 11 - 22 18 - 11 - 22 7.5 10 years 75,000,000,000 CLP T17 347,000,000,00 0 347,000,000,000 Total (CLP) 15 - 09 - 25 3,000,000,000 15 - 09 - 2022 08 - 09 - 22 0.65 3 years 3,000,000,000 JPY Bond JPY 3,000,000,000 3,000,000,000 Total JPY Amount Currency Type Date 131,00 UF Senior 13 - 01 - 2023 44,000 UF Senior 19 - 01 - 2023 45,000 UF Senior 13 - 01 - 2023

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 22 - FINANCIAL LIABILITIES AT AMORTISED COST, continued The Bank has made the following partial bond repurchases during 2022: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 125 Amount Currency Type Date 1,065,000 UF Senior 07 - 01 - 2022 150,000 UF Senior 10 - 01 - 2022 4,000,000,000 Ch$ Senior 03 - 02 - 2022 785,000 UF Senior 04 - 02 - 2022 1,205,000 UF Senior 04 - 02 - 2022 4,156,000 USD Senior 17 - 02 - 2022 7,000 UF Senior 08 - 03 - 2022 5,000 UF Senior 09 - 03 - 2022 5,000 UF Senior 10 - 03 - 2022 5,000 UF Senior 14 - 03 - 2022 70,000 UF Senior 28 - 07 - 2022 9,000 UF Senior 29 - 07 - 2022 31,000 UF Senior 05 - 08 - 2022 602,000 UF Senior 07 - 09 - 2022 100,000 UF Senior 08 - 09 - 2022 377,000 UF Senior 13 - 09 - 2022 93,000 UF Senior 27 - 09 - 2022 414,000 UF Senior 28 - 09 - 2022 50,000 UF Senior 11 - 10 - 2022 43,000 UF Senior 12 - 10 - 2022 1,000 UF Senior 13 - 10 - 2022 64,000 UF Senior 19 - 10 - 2022 181,000 UF Senior 20 - 10 - 2022 50,000 UF Senior 27 - 10 - 2022 1,000 UF Senior 02 - 11 - 2022 2,000 UF Senior 07 - 11 - 2022 687,000 UF Senior 08 - 11 - 2022 165,000 UF Senior 09 - 11 - 2022 1,000 UF Senior 15 - 11 - 2022 100,000 UF Senior 17 - 11 - 2022 3,000 UF Senior 21 - 11 - 2022 400,000 UF Senior 23 - 11 - 2022 415,000 UF Senior 28 - 11 - 2022 1,052,000 UF Senior 01 - 12 - 2022 130,000 UF Senior 06 - 12 - 2022 348,000 UF Senior 13 - 12 - 2022 140,000 UF Senior 14 - 12 - 2022 104,000 UF Senior 15 - 12 - 2022 291,000 UF Senior 16 - 12 - 2022 97,000 UF Senior 19 - 12 - 2022 4,000 UF Senior 26 - 12 - 2022 60,000 UF Senior 28 - 12 - 2022

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 22 - FINANCIAL LIABILITIES AT AMORTISED COST, continued 3. Maturities of senior bonds The maturity of the senior bonds is as follows: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 126 As of December 31, As of March 31, 2022 2023 MCh$ MCh$ 482,696 839,509 Due within 1 year 1,185,935 1,608,268 Due after 1 to 2 years 1,599,241 1,211,869 Due after 2 to 3 years 1,282,436 1,198,468 Due after 3 to 4 years 408,607 318,960 Due after 4 to 5 years 2,121,557 2,157,102 Due after 5 years 7,080,472 7,334,176 Total senior bonds i. Mortgage bonds The detail of mortgage bonds by currency is as follows: As of December 31, As of March 31, 2022 2023 MCh$ MCh$ 81,623 78,767 Mortgage bonds in UF 81,623 78,767 Total mortgage bonds 1. Mortgage bond placements The Bank has not placed any Mortgage Bonds as of March 31, 2023, and December 31, 2022. 2. Maturity of mortgage bonds The maturity of the mortgage bonds is as follows: As of December 31, As of March 31, 2022 2023 MCh$ MCh$ 7,108 9,486 Due within 1 year 11,411 11,352 Due after 1 to 2 years 11,779 11,719 Due after 2 to 3 years 12,159 12,096 Due after 3 to 4 years 12,551 12,487 Due after 4 to 5 years 26,615 21,627 Due after 5 years 81,623 78,767 Total mortgage bonds

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 22 - FINANCIAL LIABILITIES AT AMORTISED COST, continued j. Other financial liabilities The composition of other financial liabilities, according to maturity, is summarised below: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 127 As of December 31, As of March 31, 2022 2023 MCh$ MCh$ Long - term obligations: 68 65 Due after 1 to 2 years 74 76 Due after 2 to 3 years 84 76 Due after 3 to 4 years 13 - Due after 4 to 5 years - - Due after 5 years 239 217 Long - term financial liabilities subtotal Short - term obligations: 186,237 185,630 Amount payable for credit card transactions 110 46 Approval of letters of credit 106,409 127,707 Other long - term financial obligations (short - term portion) 292,756 313,383 Short - term financial obligations subtotal 292,995 313,600 Other financial obligations total

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 23 - ISSUED REGULATORY CAPITAL INSTRUMENTS The balances, as of March 31, 2023, and December 31, 2022, of Regulatory Capital Financial Instruments issued are as follows: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 128 Debts classified as short - term constitute obligations on demand or that will mature in one year or less. All other debts are classified as long - term. The details are as follows: As of March 31, 2023 Total Long - term Short - term MCh$ MCh$ MCh$ - - - Subordinated bonds with transitional recognition 1,737,368 1,737,368 - Subordinated Bonds 552,138 552,138 - Bonds without fixed maturity - - - Preferred shares 2,289,506 2,289,506 - Total As of December 31, 2022 Total Long - term Short - term MCh$ MCh$ MCh$ - - - Subordinated bonds with transitional recognition 1,733,870 1,733,870 - Subordinated Bonds 590,246 590,246 - Bonds without fixed maturity - - - Preferred shares 2,324,116 2,324,116 - Total The details of subordinated bonds by currency are as follows: As of December 31, As of March 31, 2022 2023 MCh$ MCh$ - - CLP 169,835 157,383 US$ 1,564,035 1,579,985 UF 1,733,870 1,737,368 Subordinated bond total Bonds with no fixed maturity are all in US$ currency. As of December 31, As of March 31, 2022 2023 MCh$ MCh$ Financial instruments of regulatory capital issued - - Subordinated bonds with transitional recognition 1,733,870 1,737,368 Subordinated Bonds 590,246 552,138 Bonds without fixed maturity - - Preferred shares 2,324,116 2,289,506 Subtotal

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 23 - ISSUED REGULATORY CAPITAL INSTRUMENTS, continued The movement in the balance of Regulatory Capital Financial Instruments issued as of March 31, 2023, and December 31, 2022, is as follows: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 129 Total Bonds without fixed maturity Subordinated Bonds MCh$ MCh$ MCh$ 2,324,116 590,246 1,733,870 Balance as of January 1, 2023 - - - New issues/placements made 5,274 - 5,274 Accrued interest at the effective interest rate (subordinated bonds) 19,525 - 19,525 Accrued adjustments due to UF and/or exchange rate (59,409) (38,108) (21,301) Other movements (Discounts/Hedges/Exchange rate) 2,289,506 522,138 1,737,368 Balance as of March 31, 2023 Total Bonds without fixed maturity Subordinated Bonds MCh$ MCh$ MCh$ 2,054,105 592,468 1,461,637 Balances as of January 1, 2022 101,503 - 101,503 New issues/placements made 6,562 - 6,562 Accrued interest at the effective interest rate (subordinated bonds) 172,941 - 172,941 Accrued adjustments due to UF and/or exchange rate (10,995) (2,222) (8,773) Other movements (Discounts/Hedges/Exchange rate) 2,324,116 590,246 1,733,870 Balance as of December 31, 2022 During 2023, the Bank has not issued or placed any regulatory capital instruments.

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 24 - PROVISIONS FOR CONTINGENCIES As of March 31, 2023, and as of December 31, 2022, the composition of the balance of provisions is as follows: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 130 As of December 31, As of March 31, 2022 2023 MCh$ MCh$ 99,424 58,427 Provisions for employee benefit obligation - - Provisions for restructuring plans 5,533 5,759 Provisions for lawsuits and litigations 38 38 Provisions for customer loyalty and merit programme obligations 5,149 6,891 Operational risk 62,682 51,803 Other provisions for other contingencies 172,826 122,918 Total The movement in provisions as of March 31, 2023, and December 31, 2022, is shown below: Provisions Total Operationa l risk Other Contingency Provisions Provisions for customer loyalty and merit programme obligations Lawsuits and litigatio n Restructuring plans For employee benefit obligation MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ 172,826 5,149 62,682 38 5,533 - 99,424 Balance as of January 1, 2023 23,889 1,742 1,582 - 226 - 20,339 Established provisions (59,003) - - - - - (59,003) Implementation of provisions (15,103) - (12,461) - - - (2,642) Provision release - - - - - - - Reclassifying 309 - - - - - 309 Other movements 122,918 6,891 51,803 38 5,759 - 58,427 Balance as of March 31, 2023 165,546 1,578 51,894 38 3,035 - 109,001 Balances as of January 1, 2022 167,180 4,053 24,366 - 2,963 14,019 121,779 Established provisions (147,306) (482) - - (465) (14,019) (132,340) Implementation of provisions (15,362) - (13,578) - - - (1,784) Provision release - - - - - - Reclassifying 2,768 - - - - - 2,768 Other movements 172,826 5,149 62,682 38 5,533 - 99,424 Balance as of December 31, 2022

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 25 - PROVISIONS FOR DIVIDEND, INTEREST PAYMENT AND REVALUATION OF REGULATORY EQUITY FINANCIAL The balances, as of March 31, 2023, and December 31, 2022, of provisions for dividends, interest payments and repricing of issued regulatory capital financial instruments are as follows: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 131 As of December 31, As of March 31, 2022 2023 MCh$ MCh$ 243,883 527,160 Provision for payment of common stock dividends - - Provision for payment of preferred share dividends 3,625 11,073 Provision for interest payments on bonds with no fixed maturity date - - Provision for bond repricing without fixed term to maturity 247,508 538,233 Total The movement in the balance of provisions for dividends, interest payments and repricing of regulatory capital financial instruments issued as of March 31, 2023, and December 31, 2022, is as follows: Provision for bond repricing without fixed term to maturity Provision for interest payments on bonds with no fixed term to maturity Provision for payment of preferred stock dividends Provision for payment of common stock dividends MCh$ MCh$ MCh$ MCh$ - 3,625 - 243,883 Balance as of January 1, 2023 - 6,106 - 283,277 Established provisions - - - - Implementation of provisions - - - - Provision release - - - - Reclassifying - 1,342 - - Other movements - 11,073 - 527,160 Balance as of March 31, 2023 Provision for bond repricing without fixed term to maturity Provision for interest payments on bonds with no fixed term to maturity Provision for payment of preferred stock dividends Provision for payment of common stock dividends MCh$ MCh$ MCh$ MCh$ - 4,995 - 233,775 Balances as of January 1, 2022 - 30,523 - 242,595 Established provisions - (30,528) - (232,488) Implementation of provisions - - - - Provision release - - - - Reclassifying - (1,365) - - Other movements - 3,625 - 243,883 Balance as of December 31, 2022

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 26 - SPECIAL PROVISIONS FOR CREDIT RISK As of March 31, 2023, and December 31, 2022, the composition of the balance of the special provisions for credit risk is as follows: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 132 As of December 31, As of March 31, 2022 2023 Special provisions for credit risk MCh$ MCh$ Credit risk provisions for contingent claims 9,252 9,020 Guarantees and sureties 346 420 Letters of credit for goods movement operations - - Debt purchase commitments in local currencies abroad 17,218 17,377 Transactions related to contingent events 9,890 10,418 Immediately repayable unrestricted credit lines - - Unrestricted credit lines 1,263 1,736 Other credit commitments - - Other contingent credits 37,969 38,971 Subtotal 550 19 Provisions for local risk for operations with debtors domiciled abroad 550 19 Subtotal - - Special provisions for foreign loans - - Subtotal Additional provisions for loans 122,000 122,000 Additional provisions for commercial loans 17,000 17,000 Additional provisions for mortgage loans 154,000 154,000 Additional provisions for consumer loans 293,000 293,000 Subtotal - - Provisions for adjustments to the minimum required provision for normal portfolio with individual assessment - - Subtotal - - Provisions established for credit risk as a result of supplementary prudential requirements - - Subtotal 331,519 331,990 TOTAL

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 26 - SPECIAL PROVISIONS FOR CREDIT RISK, continued The movement in provisions as of March 31, 2023, and December 31, 2022, is shown below: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 133 Provisions due to supplementary prudential requirements Provisions for adjustments to minimum provision requirements Additional provisions for loans Special provisions for foreign loans Provisions for local risk Provisions for contingent claims Special provisions for credit risk As of March 31, 2023 (MCh$) - - 293,000 - 550 37,969 Balance as of January 1, 2023 - - - - 3 4,575 Provision establishment - - - - - - Provision application - - - - (534) (3,573) Provision release - - - - - - Other changes in provisions - - 293,000 - 19 38,971 Balance as of March 31, 2023 Provisions due to supplementary prudential requirements Provisions for adjustments to minimum provision requirements Additional provisions for loans Special provisions for foreign loans Provisions for local risk Provisions for contingent claims Special provisions for credit risk As of December 31, 2022 (MCh$) - - 258,000 - 194 30,801 Balance as of January 1, 2022 - - 35,000 - 552 14,250 Provision establishment - - - - - - Provision application - - - - (196) (7,082) Provision release - - - - - - Other changes in provisions - - 293,000 - 550 37,969 As of December 31, 2022

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 27 - OTHER LIABILITIES The composition of the item 'other liabilities' as of March 31, 2023, and December 31, 2022, is as follows: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 134 As of December 31, As of March 31, 2022 2023 MCh$ MCh$ Other liabilities 1,017,967 1,078,760 Cash guarantees received for financial derivative transactions (1) 265,794 117,341 Creditors for the intermediation of financial instruments 405,878 432,776 Accounts payable to third parties 85,725 123,074 Valuation adjustments for macro - hedges (2) 6,354 6,099 Revenue liabilities due to income from ordinary activities generated by contracts with customers 36,814 41,919 VAT debit unpaid tax 21,918 19,560 Pending operations 201,232 100,828 Other liabilities 2,041,682 1,920,357 Total 1) This corresponds to guarantees related to certain derivative contracts (threshold transactions). These guarantees operate when the valuation of derivatives exceeds thresholds defined in the respective contracts and may be in favour of or against the Bank. 2) This corresponds to the balances of the mark - to - market valuation of net assets or liabilities hedged in a macro - hedge (Note 12).

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31 , 2023 , and 2022 , and as of December 31 , 2022 NOTE 28 - EQUITY a. Equity and preferred shares As of March 31 , 2023 , and December 31 , 2022 , the Bank has a share capital of MCh $ 891 , 303 comprising 188 , 446 , 126 , 794 authorised shares, which are subscribed and paid up . All these are ordinary shares with no par value and no preferences . Accordingly, share movements as of March 31 , 2023 , and December 31 , 2022 , are as follows : In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 135 Shares As of December 31, As of March 31, 2022 2023 188,446,126,794 188,446,126,794 Issued as of January 1 - - Issuance of paid - up shares - - Issuance of shares owed - - Exercised stock option 188,446,126,794 188,446,126,794 Total shares As of March 31, 2023, and December 31, 2022, the Bank does not hold any treasury shares, nor do the companies involved in the consolidation. As of March 31, 2023, the shareholders' distribution is as follows: % Of equity holding Total ADRs (*) Shares Company name or Shareholder name 35.46 66,822,519,695 - 66,822,519,695 Santander Chile Holding SA 31.72 59,770,481,573 - 59,770,481,573 Teatinos Siglo XXI Inversiones Limitada 10.53 19,845,850,871 16,362,025,271 - The Bank of New York Mellon 8.94 19,473,216,043 - 19,473,216,043 Banks on behalf of third parties 7.29 14,585,770,669 - 14,585,770,669 Pension funds (AFP) on behalf of third parties 3.25 5,660,464,269 - 5,660,464,269 Stockbrokers on behalf of third parties 2.81 5,771,649,274 - 5,771,649,274 Other minority holders 100.00 188,446,126,794 16,362,025,271 172,084,101,523 Total (*) American Depository Receipts (ADR) are certificates issued by a US commercial bank to be traded on the US securities markets. As of December 31, 2022, the distribution of shareholders is as follows: % Of equity holding Total ADRs (*) Shares Company name or Shareholder name 35.46 66,822,519,695 - 66,822,519,695 Santander Chile Holding SA 31.72 59,770,481,573 - 59,770,481,573 Teatinos Siglo XXI Inversiones Limitada 10.53 19,845,850,871 19,845,850,871 - The Bank of New York Mellon 8.94 16,841,385,216 - 16,841,385,216 Banks on behalf of third parties 7.29 13,742,809,166 - 13,742,809,166 Pension funds (AFP) on behalf of third parties 3.25 6,122,497,451 - 6,122,497,451 Stockbrokers on behalf of third parties 2.81 5,300,582,822 - 5,300,582,822 Other minority holders 100.00 188,446,126,794 19,845,850,871 168,600,275,923 Total (*) American Depository Receipts (ADR) are certificates issued by a US commercial bank to be traded on the US securities markets.

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31 , 2023 , and 2022 , and as of December 31 , 2022 NOTE 28 - EQUITY, continued b. Reserves At the Board of Directors' Meeting held on March 28 , 2023 , it was agreed to summon an Ordinary Shareholders' Meeting for April 19 , 2023 , to propose a profit distribution and dividend payment, with 60 % of retained earnings as of December 31 , 2022 equivalent to $ 2 . 57469221 per share, and to propose that the remaining 40 % of earnings be used to increase the Bank's reserves and/or retained earnings . The reserves balance is MCh $ 2 , 815 , 170 as of December 31 , 2022 , and 2021 . c. Dividends Details of dividend distribution can be found in the Interim Consolidated Statements of Changes in Equity . d. As of March 31, 2023, and 2022, the composition of diluted profit and basic profit is as follows: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 136 As of March 31, 2022 2023 MCh$ MCh$ a) Basic earnings per share 235,743 135,683 Profit attributable to equity holders 188,446,126,794 188,446,126,794 Weighted average number of outstanding shares 1.25 0.72 Basic earnings per share (in Ch$) 1.25 0.72 Diluted earnings per share from continuing operations (in Ch$) b) Diluted earnings per share 235,743 135,683 Profit attributable to equity holders 188,446,126,794 188,446,126,794 Weighted average number of outstanding shares - - Assumed conversion of convertible debt 188,446,126,794 188,446,126,794 Adjusted number of shares 1.25 0.72 Basic earnings per share (in Ch$) 1.25 0.72 Diluted earnings per share from continuing operations (in Ch$) The Bank does not hold any dilutive instruments as of March 31, 2023, and December 31, 2022.

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31 , 2023 , and 2022 , and as of December 31 , 2022 NOTE 28 - EQUITY, continued e. Provision for interest payments on bonds with no fixed term to maturity The Bank records interest accrual on the non - fixed maturity bonds in the provisions for dividends, interest payments and repricing of regulatory capital financial instruments issued . As of March 31 , 2023 , and December 31 , 2022 , the balance was MCh $ 11 , 073 and MCh $ 3 , 625 respectively . For further information, please refer to note N 25 . f. Other comprehensive income from investment instruments and cash flow hedges: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 137 As of December 31, As of March 31, 2022 2023 MCh$ MCh$ Investment instruments (112,926) (109,392) Balances as of January 1, 23,707 40,928 Gain (loss) on valuation adjustment of Investment Financial Instruments portfolio before taxes. - - Reclassifying and adjustment of the portfolio of Financial Investment Instruments (20,173) (36,773) Net realised profit 3,534 4,155 Subtotal (109,392) (105,237) Total Cash flow hedging (373,581) (118,838) Balances as of January 1, 298,029 (67,395) Gain (loss) on valuation adjustment of cash flow hedges before taxes (43,286) (10,394) Reclassifying and adjustments for cash flow hedges before taxes - - Amount reclassified from equity included as the book value of non - financial assets and liabilities. Its acquisition or disposal was hedged as a highly probable transition. 254,743 (78,329) Subtotal (118,838) (197,167) Total (228,230) (302,404) Other comprehensive income before taxes Income tax related to other comprehensive income components 29,536 28,414 Income tax relating to portfolio of financial investment instruments 32,086 53,235 Income tax relating to cash flow hedges 61,622 81,649 Total (166,608) (220,755) Other comprehensive income, net of tax Attributable to: (167,147) (220,237) Equity holders of the Bank 539 (518) Non - controlling interest The Bank expects all results included in other comprehensive income will be reclassified to profit or loss when specific conditions are met.

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 28 - EQUITY, continued g. Non - controlling interest This includes the net amount of subsidiaries' equity attributable to equity instruments not owned, directly or indirectly, by the Bank, including the portion of profit or loss attributed to them. The non - controlling interest's share of equity and the results of affiliates is summarised as follows: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 138 Other comprehensive income Total other comprehensive income Financial assets at fair value through other comprehensive income (OCI) As of March 31, 2023 Comprehensive income Deferred tax Results Equity Participation of third parties MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ % Subsidiary companies 7 - - - 7 208 0.25 Santander Corredora de Seguros Limitada (652) (1,057) 391 (1,448) 405 25,075 49.00 Santander Corredores de Bolsa Limitada 9 - - - 9 569 0.97 Santander Asesorías Financieras Limitada - - - - - 2 0.36 Santander SA Sociedad Securitizadora (373) - - - (373) (18) 49.90 Klare Corredora de Seguros SA 1,179 - - - 1,179 50,452 49.00 Santander Consumer Finance Limitada 170 (1,057) 391 (1,448) 1,227 76,288 Subtotal Entities controlled through other considerations 2,168 - - - 1,635 8,622 100.00 Santander Gestión de Recaudación y Cobranzas Limitada 3,239 - - - 1,642 25,891 100.00 Bansa Santander SA (946) - - - (397) 2,814 100.00 Multiplica Spa 4,461 - - - 2,880 37,327 Subtotal 3,050 (1,057) 391 (1,448) 4,107 113,615 Total Other comprehensive income Total other comprehensive income Financial assets at fair value through other comprehensive income (OCI) As of December 31, 2022 Comprehensive income Deferred tax Results Equity Participation of third parties MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ % Subsidiary companies 21 - - - 21 201 0.25 Santander Corredora de Seguros Limitada 1,739 (23) 9 (32) 1,762 24,725 49.41 Santander Corredores de Bolsa Limitada 47 - - - 47 561 0.97 Santander Asesorías Financieras Limitada (1) - - - (1) 3 0.36 Santander SA Sociedad Securitizadora (1,277) - - - (1,277) 356 49.90 Klare Corredora de Seguros SA 10,193 - - - 10,193 49,269 49.00 Santander Consumer Finance Limitada 10,722 (23) 9 (32) 10,745 75,115 Subtotal Entities controlled through other considerations 2,168 - - - 2,168 6,988 100.00 Santander Gestión de Recaudación y Cobranzas Limitada 3,239 - - - 3,239 24,250 100.00 Bansa Santander SA (946) - - - (946) 3,211 100.00 Multiplica Spa 4,461 - - - 4,461 34,449 Subtotal 15,183 (23) 9 (32) 15,206 109,564 Total

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 28 - EQUITY, continued The summarised financial information of the companies included in the consolidation that hold non - controlling interests is as follows, which does not include consolidation and equalisation adjustments: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 139 As of December 31, As of March 31, 2022 2023 Net income Capital and reserves Liabilities Assets Net income Capital and reserves Liabilities Assets MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ 8,327 71,121 13,093 92,541 2,742 79,456 12,548 94,746 Subsidiary Santander Corredora de Seguros Limitada 3,596 46,863 270,952 321,411 825 50,347 122,349 173,521 Subsidiary Santander Corredores de Bolsa Limitada 4,833 53,082 2,725 60,640 919 57,899 2,046 60,864 Subsidiary Santander Asesorías Financieras Limitada (148) 857 398 1,107 (34) 709 338 1,013 Subsidiary Santander SA Sociedad Securitizadora (2,559) 3,272 1,440 2,153 (748) 712 3,117 3,081 Subsidiary Klare Corredora de Seguros SA 20,800 79,755 784,146 884,701 2,407 100,555 794,870 897,832 Subsidiary Santander Consumer Finance Limitada 2,168 4,820 1,049 8,037 1,635 6,987 1,425 10,047 EPE Santander Gestión de Recaudación y Cobranzas Limitada 3,239 21,011 189,411 213,661 1,642 24,249 199,513 225,404 EPE Bansa Santander SA (946) 4,157 1,126 4,337 (397) 3,211 1,441 4,255 EPE Multiplica Spa 39,310 284,938 1,264,340 1,588,588 8,991 324,125 1,137,647 1,470,763 Total

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31 , 2023 , and 2022 , and as of December 31 , 2022 NOTE 29 - CONTINGENCIES AND COMMITMENTS a. Lawsuits and legal procedures As of the date of issuance of these Interim Consolidated Financial Statements, several lawsuits have been filed against the Bank and its affiliates concerning business operations . As of March 31 , 2023 , the Bank had provisions of MCh $ 5 , 759 (MCh $ 5 , 533 as of December 31 , 2022 ), which are included in the Interim Consolidated Statements of Financial Position under the item 'Provisions for contingencies' . For further information, please refer to Note No 24 . Banco Santander To cover the value of legal proceedings in which there are first and second - instance rulings adverse to the interests of Banco Santander or possible alternate outcomes to these . The Bank has made provisions of MCh $ 5 , 644 and MCh $ 4 , 443 as of March 31 , 2023 , and December 31 , 2022 , respectively . It is noteworthy that the values have been estimated based on quantitative information from the first instance judgements adverse to the Bank and qualitative information from the process, including expert opinion from the trial, the recommendation from the defence lawyer(s) and experience based on court judgements in similar cases (jurisprudence) pronounced by different courts . Santander Corredores de Bolsa Limitada Lawsuit 'Echeverría vs Santander Corredora de Bolsa' (currently Santander Corredores de Bolsa Ltda), filed before the 21 st Civil Court of Santiago, Role C - 12 . 366 - 2014 , regarding compensation for damages due to failures in the purchase of shares, the amount of the claim is MCh $ 60 . As for its current situation as of March 31 , 2023 , this lawsuit is pending the dismissal of the case and the resolution of the motion for abandonment of proceedings filed by the Brokerage Firm . Lawsuit 'Chilena de computación vs Banco Santander and Santander Corredores de Bolsa' filed before the 3 rd Civil Court of Santiago, Role C - 12325 - 2020 . At present, as of March 31 , 2023 , the lawsuit is in the current discussion stage, the documents requested by the Court have been exhibited, and possible actions by the petitioners are pending . Santander Corredora de Seguros Limitada Existing lawsuits amount to UF 7 , 263 , which mainly relate to assets supplied by leasing . Therefore, our lawyers have not estimated any material loss from these lawsuits . Santander Consumer Finance Limitada Currently, there are 14 lawsuits corresponding to processes mainly related to clients . Therefore, our lawyers have not estimated any material loss from these lawsuits . In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 140

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31 , 2023 , and 2022 , and as of December 31 , 2022 NOTE 29 - CONTINGENCIES AND COMMITMENTS, continued b. Contingent loans The Bank entered various irrevocable commitments and contingent obligations to meet customers' needs . Although these obligations should not be recognised in the Interim Consolidated Statements of Financial Position, they contain credit risk and are part of the Bank's overall risk . The following table shows the contractual amounts that oblige the Bank to grant loans : In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 141 Contingent loans As of December 31, As of March 31, 2022 2023 MCh$ MCh$ 924,173 654,221 Guarantees and sureties 483,807 448,973 Guarantees and sureties in Chilean currency 440,366 205,248 Guarantees and sureties in foreign currency 255,522 217,489 Letters of credit for goods movement transactions 1,476,599 1,419,209 Transactions related to contingent events 1,216,117 1,022,269 Transactions related to contingent events in Chilean currency 260,482 396,940 Transactions related to contingent events in foreign currencies 8,974,077 9,089,001 Immediately repayable unrestricted credit lines 324,962 249,500 Other credit commitments 1,617 1,355 Credits for higher studies Law No 20,027 (CAE) 323,345 248,145 Other irrevocable credit commitments 11,945,333 11,629,420 Total

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 29 - CONTINGENCIES AND COMMITMENTS, continued c. Held securities The Bank holds securities in the normal course of its business as follows: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 142 As of December 31, As of March 31, 2022 2023 MCh$ MCh$ Third - party operations 104,972 93,288 Collections 9,090 8,680 Transferred financial assets managed by the Bank 1,081,895 1,027,398 Assets from third parties managed by the Bank 1,195,957 1,129,366 Subtotal Custody of securities 756,880 Securities held in custody by a banking subsidiary deposited in another entity 9,057,428 9,300,558 Securities held in custody by the bank 12,397,099 13,648,531 Securities issued by the bank 22,211,407 22,949,089 Subtotal 23,407,364 24,078,455 Total d. Guarantee Banco Santander - Chile has a comprehensive bank policy for fidelity bond No 5721202 in force with Compañía de Seguros Chilena Consolidada SA, with coverage of US $ 50 , 000 , 000 per claim with an annual cap of US $ 100 , 000 , 000 , which covers the Bank and its subsidiaries jointly and severally, with an expiry date of December 31 , 2022 ; this policy has been renewed under the same conditions until June 30 , 2023 . Santander Corredores de Bolsa Limitada As of March 31 , 2023 , the Company has guarantees deposited with the Santiago Stock Exchange to cover simultaneous operations carried out by the Company's portfolio for a total of MCh $ 10 , 433 (MCh $ 18 , 737 as of December 31 , 2022 ) . Furthermore, as of March 31 , 2023 , the Company holds a guarantee with CCLV Contraparte Central SA, amounting to MCh $ 9 , 749 in cash (MCh $ 9 , 960 as of December 31 , 2023 ) . To ensure the correct and full compliance with all its obligations as a stockbroker, as required by articles 30 et seq . of Law No 18 , 045 on the Securities Market, the Company has delivered fixed - income securities to the Santiago Stock Exchange for a present value of MCh $ 1 , 015 as of March 31 , 2023 (MCh $ 1 , 040 as of December 31 , 2022 ) . This corresponds to a fixed - term deposit with Banco Santander maturing on August 8 , 2023 . As of March 31 , 2023 , the company has a share loan guarantee of MCh $ 3 , 615 (MCh $ 3 , 519 as of December 31 , 2022 ) .

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31 , 2023 , and 2022 , and as of December 31 , 2022 NOTE 29 - CONTINGENCIES AND COMMITMENTS, continued As of March 31 , 2023 , the Company has a guaranteed bond No B 016704 from Banco Santander Chile to comply with the provisions of general rule No 120 of the FMC regarding the operation of placement, transfer and redemption agent of Morgan Stanley funds in the amount of USD $ 300 , 000 , which covers participants who acquire quotas of Morgan Stanley Sicav open - end foreign funds and whose maturity date is March 8 , 2023 . Santander Corredora de Seguros Limitada As required by Circular No 1 , 160 of the FMC (ex - SVS), the company has procured an insurance policy to guarantee correct and full compliance with all obligations arising from its operations as an insurance intermediary . The insurance policy for insurance brokers No 10050030 , which covers UF 500 , and the professional liability policy for insurance brokers No 10050031 , for an amount equivalent to UF 60 , 000 , were renewed with Compañía de Seguros Generales Consorcio Nacional de Seguros SA . Both policies are valid from April 15 , 2022 , to April 14 , 2023 . The Company has a guaranteed bond with Banco Santander Chile to ensure faithful compliance with the terms and conditions of the public bidding process, the mortgage and mortgage insurance plus ITP 2 / 3 for Banco Santander Chile's housing mortgages . The total amounts to UF 10 , 000 and UF 2 , 000 for each portfolio, respectively, both with maturity dates of October 30 , 2023 . The company has a guaranteed bond to ensure faithful compliance with the terms of the public bidding process for fire plus earthquake insurance for the bank's housing mortgage portfolio and professional services, amounting to UF 500 and UF 10 , 000 with the same financial institution, both with maturity dates of December 31 , 2024 . Klare Corredora de Seguros SA As required by Circular No 1 , 160 of the FMC, the company has procured an insurance policy to guarantee correct and full compliance with all obligations arising from its operations as an insurance intermediary . The insurance brokers' guarantee policy No 169538 , which covers UF 500 , was contracted with Compañía HDI Seguros de Garantía y Crédito SA and is valid from April 15 , 2022 , to April 14 , 2023 . In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 143

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31 , 2023 , and 2022 , and as of December 31 , 2022 NOTE 30 - INTEREST INCOME AND EXPENSES This comprises interest accrued during the year on all financial assets whose implicit or explicit return is obtained by applying the effective interest rate method, regardless of whether they are measured at fair value and remeasurements due to hedge accounting . a. As of March 31, 2023, and 2022, the composition of interest income is as follows: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 144 As of March 31, 2022 2023 MCh$ MCh$ Financial assets at amortised cost 112 558 Rights under repurchase and securities lending agreements 15,557 15,695 Debt financial instruments 77 252 Interbank loans 188,478 304,927 Commercial loans 92,376 121,329 Mortgage loans 136,629 183,503 Consumer loans 4,375 40,581 Other financial instruments 437,604 666,845 Subtotal Financial assets at fair value through other comprehensive income 35,711 107,305 Debt financial instruments 952 2,825 Other financial instruments 36,661 110,130 Subtotal 41,179 146,525 Results of interest rate - risk hedge accounting 515,447 923,500 Total interest income As of March 31, 2023, and 2022, the stock of suspended interest income is as follows: As of March 31, 2022 2023 Interests Interests MCh$ MCh$ Off - balance sheet - interest income 9,427 15,006 Commercial loans 1,862 3,502 Mortgage loans 2,104 2,930 Consumer loans 13,393 21,438 Total

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 30 - INTEREST INCOME AND EXPENSES, continued b. As of March 31, 2023, and 2022, the composition of interest expense is as follows: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 145 As of March 31, 2022 2023 MCh$ MCh$ Financial liabilities at amortised cost (3,485) (3,114) Deposits and other demand liabilities (90,484) (283,000) Time deposits and other term equivalents (852) (9,601) Obligations under repurchase and securities lending agreements (13,863) (42,342) Interbank borrowing (37,820) (51,932) Debt financial instruments issued (1,497) (12,352) Other financial liabilities (148,001) (402,341) Subtotal (663) (778) Obligations under leasing contracts (15,333) (15,945) Regulatory capital financial instruments issued (129,637) (329,091) Results of interest rate - risk hedge accounting (293,639) (748,155) Total interest expenses

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31 , 2023 , and 2022 , and as of December 31 , 2022 NOTE 31 - READJUSTMENT INCOME AND EXPENSE Includes accrued adjustments for the period for all financial assets whose implicit or explicit return is obtained by applying the effective interest rate method, irrespective of whether they are measured at fair value and product adjustments due to hedge accounting . a. As of March 31, 2023, and 2022, the composition of readjustment income is as follows: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 146 As of March 31, 2022 2023 MCh$ MCh$ Financial assets at amortised cost - - Rights under repurchase and securities lending agreements 34,777 21,673 Debt financial instruments - - Interbank loans 152,424 78,728 Commercial loans 326,239 208,015 Mortgage loans 206 75 Consumer loans 1,932 1,360 Other financial instruments 515,578 309,851 Subtotal Financial assets at fair value through other comprehensive income 7,769 4,613 Debt financial instruments 394 195 Other financial instruments 8,163 4,808 Subtotal (288,446) (166,195) Results of hedge accounting of the UF readjustment risk 235,295 148,464 Total readjustment income As of March 31, 2023, and 2022, the stock of suspended readjustment income is as follows : As of March 31, 2022 2023 Readjustments Readjustments MCh$ MCh$ Off - balance sheet - readjustment income 16,760 26,329 Commercial loans 11,861 21,411 Mortgage loans 232 243 Consumer loans 28,853 47,983 Total

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 31 - READJUSTMENT INCOME AND EXPENSE, continued b. As of March 31, 2023, and 2022, the composition of the remeasurement expenses, including the results of hedge accounting, is as follows: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 147 As of March 31, 2022 2023 MCh$ MCh$ Readjustment expenses (2,230) (1,215) Deposits and other demand liabilities (6,814) (21,616) Time deposits and other term equivalents - - Obligations under repurchase and securities lending agreements - - Interbank borrowing (77,644) (52,298) Debt financial instruments issued (10,374) (4,880) Other financial liabilities (30,736) (19,525) Financial instruments of regulatory capital issued 98,162 52,606 Result of UF, PPI and CPI risk hedge accounting. (29,636) (46,928) Total expense for readjustments

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 32 COMMISSION INCOME AND EXPENSES Comprises the amount of all fees accrued and paid during the period, except those that are an integral part of the effective interest rate of financial instruments: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 148 As of March 31, 2022 2023 MCh$ MCh$ Income from commissions and services rendered 4,196 3,347 Commissions for prepayment of loans 60 38 Commissions for loans with letters of credit 1,954 1,547 Commissions for credit lines and current accounts overdraft 8,340 9,303 Commissions for guarantees and letters of credit 71,173 101,185 Commissions for card services 11,401 14,167 Commissions for account management 14,049 16,166 Commissions for collections and payments 2,320 1,886 Commissions for brokerage and management of securities - - Commissions for investments in mutual funds, investment funds and others 10,986 15,549 Commissions for brokerage and insurance advice 403 371 Commissions for factoring services - - Commissions for financial leasing transaction services 10 - Commissions for securitisations 2,717 7,707 Commissions for financial advice 44,520 37,910 Other commissions earned 172,129 209,176 Total Comprises the amount of all fees accrued and paid during the period, except those that are an integral part of the effective interest rate of financial instruments: As of March 31, 2022 2023 MCh$ MCh$ Expenses for commissions and services rendered (26,869) (29,211) Commissions for card operation services (1,662) (1,371) Licence fees for the use of card brands (2,908) (3,602) Other commissions for services linked to the credit card system and payment cards with fund provision as a means of payment (23,390) (22,979) Expenses for obligations of customer loyalty and merit programmes for customer cards (2,213) (1,309) Commissions for securities transactions (17,491) (20,769) Other commissions for services received (74,983) (79,241) Total 97,146 129,935 Total net fee and commission income and expenses

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 32 COMMISSION INCOME AND EXPENSES, continued Income and expenses from commissions generated by the different segments of business and the revenue recognition schedule for ordinary activities are presented below: Revenue recognition schedule for ordinary activities Segments Accrual model Transferred at a specific time Transferred through time Total Other Global Corporate Banking Middle - market Individuals + SMEs As of March 31, 2023 Total Total Total MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Commission income - 3,347 - 3,347 99 8 765 2,475 Commissions for prepayment of loans - 38 - 38 - - - 38 Commissions for loans with letters of credit - - 1,547 1,547 2 621 (299) 1,223 Commissions for credit lines and current account overdrafts - - 9,303 9,303 80 3,618 4,544 1,061 Commissions for guarantees and letters of credit - 60,711 40,474 101,185 17 4,505 8,016 88,647 Commissions for card services - - 14,167 14,167 0 224 766 13,177 Commissions for account management 9,700 6,466 - 16,166 (10,695) 2,156 2,341 22,364 Commissions for collections and payments - 1,886 - 1,886 39 1,359 53 435 Commissions for brokerage and management of securities - - - - - - - - Remuneration for insurance brokerage and advisory services 15,549 - - 15,549 (41) - 10 15,580 Commissions for factoring services - 371 - 371 41 135 155 40 Commissions for securitisations - - - - - - - - Commissions for financial advice - - - - - - - - Office Banking - 7,707 - 7,707 5,995 (188) 1,900 - Other remuneration for services rendered - 37,910 - 37,910 (831) 2,564 5,156 31,021 Other commissions earned 25,249 118,436 65,491 209,176 (5,294) 15,002 23,407 176,061 Total Commission expenses - (29,211) - (29,211) (12) (551) (3,593) (25,055) Commissions for card operation services - (1,371) - (1,371) (1) 9 (186) (1,193) Licence fees for the use of card brands - (3,602) - (3,602) - (8) (76) (3,518) Other commissions for services linked to the credit card system and payment cards with fund provision as a means of payment (22,979) - - (22,979) - - (239) (22,740) Expenses for obligations of customer loyalty and merit programmes for customer cards - (1,309) (1,309) (298) (1,011) - - Commissions for securities transactions - (20,769) - (20,769) 11,970 (1,719) (2,485) (28,535) Other commissions for services received (22,979) (56,262) - (79,241) 11,659 (3,280) (6,579) (81,041) Total 2,270 62,174 65,491 129,935 6,365 11,722 16,828 95,020 Total net fee and commission income and expenses In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 149

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 32 COMMISSION INCOME AND EXPENSES, continued Revenue recognition schedule for ordinary activities Segments Accrual model Transferred at a specific time Transferred through time Total Other Global Corporate Banking Middle - market Individuals + SMEs As of March 31, 2022 Total Total Total MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Commission income - 4,196 - 4,196 546 (2) 2,261 1,392 Commissions for prepayment of loans - 60 - 60 2 0 - 58 Commissions for loans with letters of credit - - 1,954 1,954 3 543 (213) 1,621 Commissions for credit lines and current account overdrafts - - 8,340 8,340 90 2,371 4,670 1,208 Commissions for guarantees and letters of credit - 43,800 27,313 71,173 22 1,420 2,889 66,842 Commissions for card services - - 11,401 11,401 0 164 674 10,564 Commissions for account management 7,749 6,300 - 14,049 (184) 2,015 2,062 10,156 Commissions for collections and payments - 2,320 - 2,320 297 1,370 73 580 Commissions for brokerage and management of securities (Stockbrokers and/or Securities Brokerage Firms) - - - - - - - - Commissions for investments in mutual funds, investment funds and others 11,028 - - 11,028 - - - 11,028 Remuneration for insurance brokerage and advisory services - 403 - 403 13 102 185 103 Commissions for factoring services - 0 - 0 0 0 - - Commissions for financial leasing transaction services - 10 - 10 0 10 - - Commissions for securitisations - 2,717 - 2,717 83 1,476 1,153 4 Commissions for financial advice - - - - - - - - Other financial advisory services - 44,518 - 44,518 (42) 1,728 6,197 36,634 Other commissions earned - - - - - - - - Other remuneration for services rendered 18,734 104,324 49,068 172,129 790 11,196 19,952 140,192 Total Commission expenses - (26,869) - (26,869) (68) (302) (1,899) (24,600) Commissions for card operation services - (1,662) - (1,662) (1) (16) (115) (1,531) Licence fees for the use of card brands - (2,908) - (2,908) - (10) (100) (2,798) Other commissions for services linked to the credit card system and payment cards with fund provision as a means of payment (23,390) - - (23,390) - (1) (233) (23,156) Expenses for obligations of customer loyalty and merit programmes for customer cards - (2,213) - (2,213) (787) (1,426) - - Commissions for securities transactions - (17,941) - (17,941) (513) (1,436) (1,769) (14,223) Other commissions for services received (23,390) (51,593) - (74,983) (1,369) (3,190) (4,117) (66,307) Total (4,656) 52,731 49,068 97,146 (579) 8,005 15,835 73,885 Total net fee and commission income and expenses In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 150

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31 , 2023 , and 2022 , and as of December 31 , 2022 NOTE 33 - NET FINANCIAL INCOME It includes the amount modified due to financial instruments' changes, except those attributable to interest accrued by applying the effective interest rate method of asset value adjustments and results on the sale and purchase of financial instruments . As of March 31 , 2023 , and 2022 , the detail of the results from financial operations is as follows : In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 151 As of March 31, 2022 2023 MCh$ MCh$ Results from financial assets held for trading at fair value through profit or loss 17,35 6 132,091 Financial derivatives contracts 346 1,138 Debt financial instruments 4 13 Other financial instruments 17,70 6 133,242 Subtotal Results from financial liabilities held for trading at fair value through profit or loss - - Financial derivatives contracts - - Other financial instruments - - Subtotal Financial results from financial assets not held for trading mandatorily measured at fair value through profit or loss - - Debt financial instruments - - Other - - Subtotal Financial results from financial assets designated at fair value through profit or loss - - Debt financial instruments - - Other financial instruments - - Subtotal Financial results from financial liabilities designated at fair value through profit or loss - - Demand deposits and other demand liabilities, and Time deposits and other term equivalents - - Issued debt instruments - - Other - - Subtotal Financial results on derecognition of financial assets and liabilities at amortised cost and financial assets at fair value through other comprehensive income 378 - Financial assets at amortised cost 612 (36,773) Financial assets at fair value through other comprehensive income 13,10 2 212 Financial liabilities at amortised cost - - Financial instruments of regulatory capital issued 14,09 2 (36,561) Subtotal 31,79 8 96,681 Total

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 33 - NET FINANCIAL INCOME, continued As of March 31, 2023, and 2022, the detail of the financial results from foreign exchange, readjustments and hedge accounting of foreign currencies are as follows: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 152 As of March 31, 2022 2023 MCh$ MCh$ Financial results from foreign exchange, foreign exchange restatements and hedging of foreign currencies 489,715 260,867 Result from foreign exchange (9,047) (8,430) Exchange rate readjustment results - - Financial assets held for trading at fair value through profit or loss - - Non - trading financial assets mandatorily measured at fair value through profit or loss - - Financial assets designated at fair value through profit or loss - - Financial assets at fair value through other comprehensive income (9,036) (8,416) Financial assets at amortised cost (10) (14) Other assets - - Financial liabilities at amortised cost Financial liabilities held for trading at fair value through profit or loss - (405) Financial liabilities designated at fair value through profit or loss - - Financial instruments of regulatory capital issued (455,608) (271,341) Net result of derivatives in foreign currency risk hedge accounting 25,060 (19,309) Subtotal Financial results from reclassifying financial assets due to changes in the business model - - From financial assets at amortised cost to financial assets for trading at fair value through profit or loss - - From financial assets at fair value through other comprehensive income to financial assets held for trading at fair value through profit or loss - - Subtotal Other financial results from changes in financial assets and liabilities - - Financial assets at amortised cost - - Financial assets at fair value through other comprehensive income - - Financial liabilities at amortised cost - - Obligations under leasing contracts - - Financial instruments of regulatory capital issued - - Subtotal - - Other financial results from ineffective hedge accounting - - Other financial results from other hedge accounting - - Subtotal 56,858 77,372 Total

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 34 - INCOME FROM INVESTMENTS IN COMPANIES The Interim Consolidated Statements of Income present results from investments in partnerships of MCh$1,542 as of March 31, 2023, and MCh$1,360 as of March 31, 2022, as follows: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 153 , Result from investments Institutions' Participation As of March 31, As of March 31 2022 2023 2022 2023 MCh$ MCh$ % % Companies 64 148 33.43 33.43 Redbanc SA 931 817 25.00 25.00 Transbank SA 188 317 33.33 33.33 Centro de Compensación Automatizado SA 43 67 29.29 29.29 Sociedad Interbancaria de Depósito de Valores SA 17 20 15.00 15.00 Cámara de Compensación de Alto Valor SA 82 130 20.00 20.00 Administrador Financiero del Transantiago SA 30 40 12.48 12.48 Servicios de Infraestructura de Mercado OTC SA 1,355 1,539 Subtotal Shares or rights in other companies - - Trading Exchanges 5 3 Other 5 3 Subtotal 1,360 1,542 Total For more detailed financial information on the companies, see Note 14.

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 35 - NON - CURRENT ASSETS AND DISPOSAL GROUPS NOT QUALIFYING AS DISCONTINUED OPERATIONS The composition of the result on non - current assets and disposal groups that do not classify as discontinued transactions (assets received in lieu of payment) is as follows: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 154 As of March 31, 2022 2023 MCh$ MCh$ Net results from assets received in payment or awarded in a judicial auction 2,666 2,176 Results from the sale of goods received in payment or awarded in a judicial auction 135 2,209 Other income from assets received in lieu of payment or awarded in a judicial auction (40) 176 Provisions for adjustments to the net realisable value of assets received in lieu of payment or awarded in a judicial auction (3,417) (3,263) Charge - offs of assets received in payment or awarded in a judicial auction (263) (511) Expenses for maintenance of assets received in lieu of payment or awarded in a judicial auction 19 2,142 Non - current assets held for sale and disposal group 900 2,929 Total

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 36 - OTHER OPERATING INCOME AND EXPENSES a) Other operating income consists of the following items: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 155 As of March 31, 2022 2023 MCh$ MCh$ Other operating income 45 - Compensation from insurance companies for claims other than operational risk events 100 222 Income from expense recovery 76 322 Other income 221 544 Total b) Other operating expenses consist of the following items: As of March 31, 2022 2023 MCh$ MCh$ OTHER OPERATIONAL EXPENSES (13,050) (2,258) Expenditure on insurance premiums to cover operational risk events (51) (1,742) Provisions for operational risk 158 1 Operational risk event expense recoveries (144) (392) Provisions for lawsuits and litigations (750) (969) Expenses from financial leasing credit operations (142) (166) Expenses for factoring credit operations (5,679) (1,242) Other operational expenses (19,686) (6,769) Total

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 37 - EMPLOYEE BENEFIT OBLIGATION EXPENSES Expenses for employee benefits as of March 31, 2023, and 2022 are as follows: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 156 As of March 31, 2022 2023 MCh$ MCh$ (84,938) (82,667) Expenses for short - term employee benefits (4,436) (3,693) Expenses for long - term employee benefits (4,797) (9,185) Expenses for termination of employment benefits to employees (422) (375) Expenses for defined benefit post - employment plan obligations (2,953) (1,294) Other human resources costs (97,546) (97,214) Total Share - based compensation (settled in cash) The Bank provides certain executives of the Bank and its affiliates a share - based payment benefit, which is settled in cash according to the requirements of IFRS 2. Accordingly, the Bank measures services received and liabilities incurred at fair value. Until settlement of the liability, the Bank determines the liability's fair value at the end of each reporting period and on the settlement date, with any fair value changes recognised in the period results. Pension plan The Bank has an additional benefit available to its senior executives, consisting of a pension plan to provide them with funds for a better complementary pension upon retirement. In this respect, the Bank will complement the voluntary contributions made by beneficiaries for their future pension with an equal contribution. Executives shall earn the right to receive this benefit only if they meet the following copulative conditions: a) Aimed at the Group's senior management. b) The general requirement for eligibility is to be still employed when they are 60 years old. c) The Bank will contract a mixed collective insurance policy (life and savings) for each executive, with the contracting party and beneficiary being the Group company to which the executive belongs. d) Periodic contributions will be made equal to the amount each manager commits to their voluntary contribution plan. e) The Bank will be responsible for granting the benefits directly. In the event of termination of the employment relationship between the executive and the respective company before meeting the conditions described above, no entitlement shall accrue to them under this benefit plan.

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31 , 2023 , and 2022 , and as of December 31 , 2022 NOTE 37 - EMPLOYEE BENEFIT OBLIGATION EXPENSES, continued Exceptionally, in the event of the manager's death or total or partial disability, their heirs shall be entitled to receive this benefit as the case may be . The Bank will contribute to this benefit plan based on mixed group insurance policies, the beneficiary of which is the Bank . The life insurance company with which these policies are contracted is unrelated to the Bank or any other Group company . The Bank's entitlements under the plan as of March 31 , 2023 , amounted to MCh $ 7 , 227 (MCh $ 6 , 819 as of December 31 , 2022 ) . The Bank has quantified the amounts of the defined benefit obligations based on the following criteria : Calculation method: The projected unit credit method is used, which treats each year of service as generating an additional unit of benefit entitlement and values each unit separately . It is calculated according to the fund contribution that considers as the main parameters the factors related to the legal annual pension ceiling, the years of service, age and annual income of each unit valued individually . Actuarial assumptions used: Actuarial assumptions regarding demographic and financial variables are unbiased and mutually compatible . The most significant actuarial assumptions considered in the calculations were : The assets related to the savings fund that the Bank to the Compañía de Seguros Euroamérica contributed for particular service plans are presented in the net - related commitments . The assumptions used are as follows : In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 157 As of December 31, 2022 As of March 31, 2023 Post - Employment Plans RV - 2014 RV - 2014 Mortality chart 5.0% 5.0% Termination of contract rate PDT 1985 PDT 1985 Impairment chart The movement in the period for post - employment benefits is as follows: As of December 31, As of March 31, 2022 2023 MCh$ MCh$ 6,819 7,227 Assets for defined post - employment benefits Commitments for defined benefit plans (6,277) (6,653) With active personnel - - Caused by inactive personnel Minus: - - Unrecognised actuarial (gains) losses 542 574 Balances at the end of the period

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 37 - EMPLOYEE BENEFIT OBLIGATION EXPENSES, continued The period cash flow for post - employment benefits is as follows: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 158 As of December 31, As of March 31, 2022 2023 MCh$ MCh$ Fair value of plan assets 7,127 6,819 Balance at the beginning of the period 211 96 Expected return on insurance contracts 337 312 Employer contributions - - Actuarial (gains) losses - - Premiums paid (856) - Benefits paid 6,819 7,227 Fair value of plan assets at the end of the period Present value of obligations (6,633) (6,227) Present value of the obligations at the beginning of the period - - Net incorporation of companies into the Group (356) (376) Current period service costs - - Reduction/settlement effects - - Benefits paid - - Past service costs - - Actuarial (gains) losses - - Other movements (6,277) (6,653) Present value of obligations at the end of the period 542 574 Net balance at the end of the period Expected performance of the Plan: As of December 31, As of March 31, 2022 2023 UF+ 2.50% per year UF+ 2.50% per year Expected rate of return on plan assets UF+ 2.50% per year UF+ 2.50% per year Expected rate of return on redemption rights Costs related to the Plan: As of December 31, As of March 31, 2022 2023 MCh$ MCh$ (356) (375) Current period service costs - - Interest cost 211 96 Expected return on plan assets - - Extraordinary allocations - - Actuarial (gains)/losses recorded in the period - - Past service cost - - Other (145) (279) Total

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 38 - ADMINISTRATIVE EXPENSE As of March 31, 2023, and 2022, the item is composed as follows: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 159 As of March 31, 2022 2023 MCh$ MCh$ 42,214 46,613 General administrative expenses 841 1,895 Expenses for short - term lease agreements - - Expenses for low - value leases 29 23 Other expenses for lease obligations 6,258 6,573 Maintenance and repair of property, plant and equipment 1,270 1,308 Insurance premiums except to hedge operational risk events 1,369 1,929 Office Supplies 20,362 19,916 IT and communication expenses 1,379 1,355 Lighting, heating, and other utilities 4,180 5,160 Security and valuables transport services 435 927 Representation and personnel travel expenses 320 237 Judicial and notarial expenses 135 280 Fees for review and audit of the financial statements by the external auditor - - Fees for advisory and consultancy services provided by the external auditor 38 40 Fees for advisory and consultancy services provided by other audit firms - - Fees for securities classification 1,781 1,545 Fees for other technical reports - - Fines applied by the FMC - - Fines applied by other bodies 3,817 5,425 Other general administrative expenses 18,177 19,068 Outsourced services 9,282 9,226 Data processing 847 816 Technology development, certification and technology testing service 5 6 External human resources management and external staffing service - - Valuation service 9 7 Call Centre service for sales, marketing, quality control and customer service 90 45 External collection service 114 63 Outsourced ATM management and maintenance services 1,112 878 External cleaning service, casino, custody of files and documents, furniture and equipment storage. 72 - Product sales and distribution services 1,416 925 External credit appraisal service 5,230 7,102 Other outsourced services 399 427 Board expenses 399 427 Remuneration of the Board of Directors - - Other Board Expenses 5,312 5,681 Marketing expenses 4,940 5,508 Taxes, contributions, fees 610 613 Real estate contributions 620 797 Patents - 1 Other taxes 3,710 4,097 Contribution to the FMC (ex - SBIF) - - Other legal charges 71,043 77,297 Total

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 39 - DEPRECIATION AND AMORTISATION The amounts corresponding to depreciation and amortisation charges to income as of March 31, 2023, and 2022 are detailed below: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 160 As of March 31, 2022 2023 MCh$ MCh$ Depreciation and amortisation (9,685) (13,282) Amortisation of intangible assets (11,923) (11,361) Depreciation of fixed assets (10,006) (11,404) Depreciation and amortisation of assets for rights to use leased property (31,614) (36,047) Total Depreciation and Amortisation The reconciliation between the book value and balances as of March 31, 2023, and 2022 is as follows: Depreciation and amortisation 2023 Total Right of use assets Intangible assets Fixed assets MCh$ MCh$ MCh$ MCh$ (825,175) (181,385) (243,520) (400,270) Balance as of January 1, 2023 (36,047) (11,404) (13,282) (11,361) Depreciation and amortisation charges for the period 6,221 4,433 - 1,788 Disposals and sales for the period 1 18 - (17) Other (855,000) (188,338) (256,802) (409,860) Balance as of March 31, 2023 Depreciation and amortisation 2022 Total Right of use assets Intangible assets Fixed assets MCh$ MCh$ MCh$ MCh$ (721,014) (162,228) (201,146) (357,639) Balances as of January 1, 2022 (31,614) (10,006) (9,685) (11,923) Depreciation and amortisation charges for the period 2,629 2,536 - 93 Disposals and sales for the period - - - - Other (749,998) (169,698) (210,831) (369,469) Balances as of March 31, 2022

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 40 - IMPAIRMENT OF NON - FINANCIAL ASSETS The amounts corresponding to impairment charges to income as of March 31, 2023, and 2022 are detailed below: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 161 As of March 31, 2022 2023 MCh$ MCh$ - - Impairment of investments in companies - - Impairment of intangible assets - - Impairment of fixed assets - - Impairment of assets for the right to use leased assets - - Impairment of other assets for investment properties - - Impairment of other assets due to income from ordinary activities generated by contracts with customers - - Acquisition gain through a business combination on highly advantageous terms - - Total As of March 31, 2023, the Bank has no impairment amounts for non - financial assets.

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 41 - CREDIT LOSS EXPENSE The movement as of March 31, 2023, and 2022 in credit loss expense is summarised as follows: a. The breakdown of credit loss expenses as of March 31, 2023, and 2022 is as follows: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 162 As of March 31, 2022 2023 Breakdown of loan loss expense for the period MCh$ MCh$ (86,613) (132,039) Provisions for credit risk on loans and advances to credit institutions (2,918) (1,354) Expenditure on special provisions for credit risk 18,100 20,314 Recovery of impaired loans (15) (1,169) Impairment for credit risk on other financial assets not measured at fair value through profit or loss (71,447) (114,248) Total .

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 41 - CREDIT LOSS EXPENSE, continued b. The flow of expenditure on provisions set for credit risk and expense for credit loss on loans as of March 31, 2023, and 2022 is as follows: Breakdown of expenditure on provisions established for credit risk and credit loss for the period - As of March 31, 2023 Loan provisions expenses in the period Substandard Non - performing In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 163 Normal portfolio Evaluation Portfolio Evaluation portfolio Evaluation Subtotal Deductible FOGAPE Covid - 19 guarantees Group Individual Individual Group Individual (MCh$) (45) (45) - - - - - (45) Interbank loans Provision establishment 34 34 - - - - - 34 Provision release (11) (11) - - - - - (11) Subtotal Commercial loans (48,875) (48,875) - (25,342) (11,095) (6,483) (1,496) (4,459) Provision establishment 24,537 22,746 1,791 581 4,371 5,047 5,388 7,359 Provision release (24,338) (26,129) 1,791 (24,761) (6,724) (1,436) 3,892 2,900 Subtotal Mortgage loans (18,360) (18,360) - (16,772) - - (1,588) - Provision establishment 37 37 - - - - 37 - Provision release (18,323) (18,323) - (16,772) - - (1,551) - Subtotal Consumer loans (92,057) (92,057) - (78,189) (8,509) - (5,359) - Provision establishment 2,690 2,690 - 111 - - 2,579 - Provision release (89,367) (89,367) - (78,078) (8,509) - (2,780) - Subtotal Provisions for credit risk on loans 2,889 (439) (1,436) (15,233) (119,611) (133,830) 1,791 (132,039) Total and advances to credit institutions - Recovery of impaired loans: Interbank loans 9,426 Commercial loans 5,099 Mortgage loans 5,789 Consumer loans 20,314 Subtotal (111,725) Total

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 41 - CREDIT LOSS EXPENSE, continued Breakdown of expenditure on provisions set for credit risk and credit loss for the period - as of March 31, 2022 Loan provisions expenses in the period Substandar Non - performing Normal portfolio Evaluation d Portfolio Evaluation portfolio Evaluation Subtota l Deductible FOGAPE Covid - 19 guarantee s Total Individua l Group Individual Individua l Group (MCh$) Interbank loans Provision establishment Provision release (3) 3 - - - - - - - - (3) 3 - - (3) 3 Subtotal - - - - - - - - Commercial loans Provision establishment Provision release (4,427) 2,271 (3,213) 478 (1,435) 4,114 (10,339) 7,285 (40,140) 2,215 (59,554 ) 16,363 2,656 - (59,554 ) 19,019 Subtotal (2,156) (2,735) (2,679) (3,054) (37,925 ) (43,191) 2,656 (40,535 ) Mortgage loans Provision establishment Provision release - (1,746) - 4 - - - (31,827) - 910 (33,573) 914 (33,573 ) - - 914 Subtotal - (1,742) - - (30,917 ) (32,659) - (32,659 ) Consumer loans Provision establishment Provision release - (13,441) - 19,820 - - - (32,924) - 13,126 (46,365) 32,946 (46,365 ) - - 32,946 Subtotal - 6,379 - - (19,798 ) (13,419) - (13,419 ) Provisions for credit risk on loans and advances to credit institutions (2,156) 1,902 (2,679) (3,054) (88,640 ) (89,269) 2,656 (86,614 ) Recovery of impaired loans: Interbank loans Commercial loans Mortgage loans Consumer loans - 8,051 4,300 5,749 Subtotal 18,100 Total (68,614 ) In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 164

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 41 - CREDIT LOSS EXPENSE, continued The balances of special provisions for credit risk expenses as of March 31, 2023, and 2022 are as follows: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 165 As of March 31, 2022 2023 Breakdown of special provisions for credit risk expense for the period MCh$ MCh$ (3,072) (1,885) Provision expense for contingent credits - - Interbank loans (3,085) (1,647) Commercial loans 13 (238) Consumer loans 155 531 Expense of provision expenditure for local risk for operations with debtors domiciled abroad - - Expense of special provisions for loans abroad - - Expense of additional provisions for loans - - Commercial loans - - Mortgage loans - - Consumer loans - - Expense of provision for adjustments to the minimum required provision for the normal portfolio with individual evaluation - - Expense of provisions established for credit risk as a result of additional prudential requirements 2,918 (1,354) Total

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 42 - RESULTS FROM DISCONTINUED OPERATIONS The Bank currently has no results from discontinued operations. In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 166

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31 , 2023 , and 2022 , and as of December 31 , 2022 NOTE 43 - RELATED PARTY DISCLOSURES 'Related parties' refers to the Bank as well as its subsidiaries and associates, the 'key personnel' of the Bank's management (members of the Bank's Board of Directors and also the managers of Banco Santander - Chile and its affiliates, together with their close relatives), as well as entities over which the key personnel may exercise significant influence or control . Furthermore, the Bank considers the various companies comprising Santander Group worldwide to be related parties, on the understanding that they all have a common parent company, which is Banco Santander SA (based in Spain) . Article 89 of the Chilean Corporation Law, which also applies to banks, provides that any transaction with a related party must be carried out on fair terms and conditions similar to those normally prevailing in the market . Additionally, Article 84 of the General Banking Law limits credits granted to related parties and prohibits granting credits to the Bank's directors, general managers, or general representatives . The Bank's transactions with its related parties are listed below . For ease of understanding, we have divided the information into four categories : Santander Group companies This category includes entities over which the Bank, as indicated in Note 01 (b) of these Consolidated Financial Statements, exercises some degree of influence and generally corresponds to the so - called' business support companies' . Associated companies This category includes those entities over which the Bank, as indicated in Note 01 (b) of these Interim Consolidated Financial Statements, exercises some degree of influence and, in general, corresponds to the so - called' business support companies' . Key personnel This category includes the members of the Bank's Board of Directors and Directors of Banco Santander - Chile and its affiliates, together with their close relatives . Other This category includes those related parties not included in the groups described above and generally correspond to those entities over which key personnel can exercise noteworthy influence or control . The terms for transactions with related parties are equivalent to those of transactions made under market conditions or to which the corresponding considerations in kind have been attributed . In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 167

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 43 - RELATED PARTY DISCLOSURES, continued a. Loans to related parties Credits and receivables, as well as contingent credits corresponding to related entities, are shown below: The movement in related party loans during the financial years of 2023 and 2022 has been as follows: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 168 As of December 31, As of March 31, 2022 2023 Other Key personn el Associated companies Group companies Other Key personn el Associate d companie s Group companies MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Loans and receivables: 280 3,185 118 680,624 1,097 2,827 - 693,970 Commercial loans - 30,479 - - - 29,203 - - Mortgage loans - 6,540 - - - 5,617 - - Consumer loans 280 40,204 118 680,624 1,097 37,647 - 693,970 Loans and receivables (10) (164) (8) (2,213) (110) (373) - (2,131) Provision for loan losses 270 40,040 110 678,411 988 37,274 - 691,839 Net loans 110 31,590 - 1,031 117 31,585 - 1,033 Guarantee Contingent loans: - - - - - - - - Guarantees and sureties - - - 19,162 - - - 4 Letters of credit - - - 30,422 332 - - 61 Transactions with contingent events - - - 49,584 332 - - 65 Contingent loans - - - (41) (2) - - (4) Provisions for contingent credits - - - 49,543 330 - - 61 Net contingent loans As of December 31, As of March 31, 2022 2023 Personal Compani es Group Personal Companie s Group Other personn el compani es companies (*) Other personn el companie s companies (*) MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ 219 29,889 192 607,378 280 40,204 118 730,208 Balance as of January 1, 156 18,115 29 179,540 1,175 2,403 - 16,168 Loans granted (95) (7,800) (103) (56,710) (26) (4,960) (118) (52,341) Loans paid 280 40,204 118 730,208 1,429 37,647 - 694,035 Total (*) As of March 31, 2023, and December 31, 2022, loans corresponding to group companies outside the scope of consolidation amounted to MCh$487 and MCh$27,544, respectively.

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 43 - RELATED PARTY DISCLOSURES, continued b. The assets and liabilities for related party transactions as of March 31, 2023, and December 31, 2022, are as follows: Assets and liabilities from transactions with related parties In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 169 Type of related party Types of assets and liabilities held with related parties As of March 31, 2023 (MCh$) Other Key personnel Associated companies Group companies ASSETS - - - 828,324 Cash and deposits in banks Financial assets held for trading at fair value through profit or loss - - 523,977 978,820 Financial derivatives contracts - - 286,605 476,876 Other assets LIABILITIES Financial liabilities held for trading at fair value through profit or loss - - 375,848 1,222,163 Financial derivatives contracts Financial liabilities at amortised cost 761 4,772 3,911 68,655 Deposits and other demand liabilities 1,259 14,397 - 137,944 Time deposits and other term equivalents 23,920 - - 109,151 Obligations under repurchase and securities lending agreements - - - - Interbank borrowing - - - 953,041 Debt and regulatory capital financial instruments issued - - 348,126 189,547 Other liabilities Type of related party Types of assets and liabilities held with related parties As of December 31, 2022 (MCh$) Other Key personnel Associated companies Group companies ASSETS - - - 280,364 Cash and deposits in banks Financial assets held for trading at fair value through profit or loss - - 386,494 1,190,683 Financial derivatives contracts - - 287,053 676,850 Other assets LIABILITIES Financial liabilities held for trading at fair value through profit or loss - - 326,149 1,695,284 Financial derivatives contracts Financial liabilities at amortised cost 833 4,398 - 73,193 Deposits and other demand liabilities 1,102 9,442 - 10,376 Time deposits and other term equivalents 18,135 - - 64,547 Obligations under repurchase and securities lending agreements - - - 224,798 Interbank borrowing - - - 1,001,310 Debt and regulatory capital financial instruments issued - - 325,070 267,130 Other liabilities

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 43 - RELATED PARTY DISCLOSURES, continued c. Income and expenses from related party transactions In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 170 Type of income and expenses from related party transactions Other Key personnel Associated companies Group companies As of March 31, 2023 (MCh$) (4) 475 - (9,837) Interest and adjustment income and expenses 7 6 17,810 42,411 Commission and service income and expenses - - 71,803 51,603 Net income from financial operations and foreign exchange results (*) - - (594) 218 Other operating income and expenses - (11,651) - - Remuneration and expenses of key personnel - - (18,248) (20,632) Administrative and other expenses (*) Corresponds mainly to derivative contracts used to financially hedge the foreign exchange risk of the assets and liabilities hedging positions of the Bank and its affiliates. (*) Corresponds mainly to derivative contracts used to financially hedge the foreign exchange risk of the assets and liabilities hedging positions of the Bank and its affiliates. Type of income and expenses from related party transactions Other Key personnel Associated companies Group companies As of March 31, 2022 (MCh$) (6) 817 4 (17,237) Interest and adjustment income and expenses 2 69 18,680 36,908 Commission and service income and expenses - - (105,096) (269,879) Net income from financial operations and foreign exchange results (*) - - (550) 123 Other operating income and expenses - (12,408) - - Remuneration and expenses of key personnel - - (18,936) (19,309) Administrative and other expenses

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 43 - RELATED PARTY DISCLOSURES, continued d. Individual transactions in the period with related parties that are legal entities, which do not correspond to normal business transactions with customers in general and which involve a transfer of resources, services or obligations of more than UF 2,000, per paragraph 9 of IAS 24. In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 171 Effect on the statement of position Effect on the income statement Transactions on matching terms to those transactions with mutual independence between the parties. Description of the transaction As of March 31, 2023 Payables MCh$ Receivables MCh$ Expenditure MCh$ Revenues MCh$ Renewal conditions Term Type of service Nature of the relationship with the Bank Country of residence Company name 4,012 - 4,018 - Yes Under contract Monthly Consulting Services Group Spain Banco Santander, SA - - 810 - Yes Under contract Monthly BackOffice services Group Spain Santander Back - Offices Globales Mayoristas, SA 58 10 106 10 Yes Under contract Monthly Leases, Custody and Portal Group Chile Santander Factoring SA 217 16 272 16 Yes Under contract Monthly Accounting Services Group Chile Gesban Santander Servicios Profesionales Contables Limitada - - 136 - Yes Under contract Monthly Consulting services Group Spain Santander Global Facilities, SL 24 - 1,162 - Yes Under contract Monthly Leases Group Chile Santander Investment Chile Limitada 73 - 73 - Yes Under contract Monthly IT Services Group Chile Santander Global Technology and Operations Chile Limitada 131 - 111 - Yes Under contract Monthly Institutional Services Group Chile Universia Chile, SA 493 - 428 - Yes Under contract Monthly Procurement Services Group Chile Aquanima Chile SA 19 - 166 - Yes Under contract Monthly Leases and Other Group Chile Santander Asset Management SA Administradora General de Fondos - 50 - 50 Yes Under contract Monthly Channel Usage Services Group Chile Zurich Santander Seguros Generales Chile SA - - 11,898 - Yes Under contract Monthly IT Services Group Spain Santander Global Technology and Operations, SL Unipersonal - - 837 - Yes Under contract Monthly Derivatives clearing Group Chile Centro de Compensación Automatizado SA - - 1,259 - Yes Under contract Monthly Digital payments Group Spain PagoNxt Trade Services, SL

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 43 - RELATED PARTY DISCLOSURES, continued In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 172 Effect on the statement of position Effect on the income statement Transactions on matching terms to those transactions with mutual independence between the parties. Description of the transaction As of December 31, 2022 Payables MCh$ Receivables MCh$ Expenditure MCh$ Revenues MCh$ Renewal conditions Term Type of service Nature of the relationship with the Bank Country of residence Company name 1,642 - 15,999 - Yes Under contract Monthly Consulting Services Group Spain Banco Santander, SA - - 3,059 - Yes Under contract Monthly BackOffice services Group Spain Santander Back - Offices Globales Mayoristas, SA - 234 - 234 Yes Under contract Monthly Leases Group Chile Santander Chile Holding SA 133 39 423 39 Yes Under contract Monthly Leases, Custody and Portal Group Chile Santander Factoring SA 523 60 1,019 60 Yes Under contract Monthly Accounting Services Group Chile Gesban Santander Servicios Profesionales Contables Limitada - - 341 - Yes Under contract Monthly Consulting services Group Spain Santander Global Facilities, SL 26 - 4,381 - Yes Under contract Monthly Leases Group Chile Santander Investment Chile Limitada - - 258 - Yes Under contract Monthly IT Services Group Chile Santander Global Technology and Operations Chile Limitada - 8 341 8 Yes Under contract Monthly Institutional Services Group Chile Universia Chile, SA - - 1,710 - Yes Under contract Monthly Procurement Services Group Chile Aquanima Chile SA 78 - 626 - Yes Under contract Monthly Leases and Other Group Chile Santander Asset Management SA Administradora General de Fondos - 187 - 187 Yes Under contract Monthly Channel Usage Services Group Chile Zurich Santander Seguros Generales Chile SA - - 49,744 - Yes Under contract Monthly IT Services Group Spain Santander Global Technology and Operations, SL Unipersonal - - 256 - Yes Under contract Monthly IT Services Group Chile Mercury Trade Finance Solutions, SpA - - 2,184 - Yes Under contract Monthly Derivatives clearing Group Chile Centro de Compensación Automatizado SA - - 632 - Yes Under contract Monthly Card Operator Group Chile Sociedad Operadora de la Cámara de Compensación de Pagos de Alto Valor SA - - 284 - Yes Under contract Monthly Digital payments Group Spain PagoNxt Trade Services, SL

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31 , 2023 , and 2022 , and as of December 31 , 2022 NOTE 43 - RELATED PARTY DISCLOSURES, continued Payments to the Board of Directors and key management personnel of the Bank and its subsidiaries. The remuneration received by key management personnel, including the members of the Bank's Board of Directors and Banco Santander - Chile's executives, are presented under the item 'Remuneration and personnel expenses' and/or 'Administrative expenses' in the Interim Consolidated Income Statements and corresponds to the following categories : In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 173 As of March 31, 2022 2023 MCh$ MCh$ 5,011 5,388 Remuneration of personnel 399 427 Remuneration of the Board of Directors 5,068 4,356 Bonuses or gratuities 1,186 318 Stock - based compensation 6 367 Seniority compensation 180 375 Pension plans 49 31 Training Costs 87 91 Health funds 422 298 Other personnel costs funds 12,408 11,651 Total Composition of the Board of Directors and key management personnel of the Bank and its subsidiaries. As of March 31, Composition of the Board of Directors and Key Management Personnel of the Bank and its Subsidiaries 2022 2023 MCh$ MCh$ 11 11 Directors 132 121 Managers 143 132 Total

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31 , 2023 , and 2022 , and as of December 31 , 2022 NOTE 44 - FAIR VALUE OF FINANCIAL ASSETS AND FINANCIAL LIABILITIES Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction in the principal (or most advantageous) market at the measurement date under current market conditions (i . e . an exit price) regardless of whether that price is directly observable or estimated using another valuation technique . The fair value measurement assumes that the transaction to sell the asset or transfer the liability occurs in the principal market for the asset or liability or the most advantageous market for the asset or liability . For those financial instruments for which market prices are not available, fair values have been estimated using recent transactions in similar instruments or, if absent, current values or other valuation techniques based on mathematical valuation models sufficiently validated by the international financial community . In using these models, the specific features of the asset or liability to be valued and, in particular, the different types of risks related to the asset or liability are considered . These techniques are inherently subjective and significantly affect the assumptions used, including the discount rate, estimates of future cash flows and prepayment assumptions . Therefore, the fair value of an asset or liability may not coincide exactly with the price at which the asset or liability could be delivered or settled on its valuation date and may not be justified by comparison with independent markets . Determining the fair value of financial instruments The following is a comparison between the book value of the Bank's financial assets and liabilities and their corresponding fair values as of March 31 , 2023 , and December 31 , 2022 : In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 174 As of December 31, 2022 As of March 31, 2023 Fair value Book value Fair value Book value MCh$ MCh$ MCh$ MCh$ Assets 11,827,006 11,827,006 11,631,884 11,631,884 Financial assets held for trading at fair value through profit or loss 11,672,960 11,672,960 11,490,794 11,490,794 Financial derivatives contracts 154,046 154,046 141,090 141,090 Debt financial instruments 6,023,039 6,023,039 6,542,868 6,542,868 Financial assets at fair value through other comprehensive income 5,880,733 5,880,733 6,336,094 6,336,094 Debt financial instruments 142,306 142,306 206,773 206,773 Other financial instruments 477,762 477,762 360,339 360,339 Financial derivative contracts for hedge accounting 43,838,759 43,596,957 42,917,946 42,615,414 Debt financial instruments at amortised cost 4,496,503 4,867,591 4,403,482 4,755,740 Debt financial instruments 39,342,256 38,729,366 38,514,464 37,859,674 Interbank loans and receivables from customers 2,442,325 2,442,325 2,993,244 2,993,244 Guarantees provided for derivative financial transactions

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 44 - FAIR VALUE OF FINANCIAL ASSETS AND FINANCIAL LIABILITIES, continued In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 175 As of December 31, 2022 As of March 31, 2023 Fair value Book value Fair value Book value MCh$ MCh$ MCh$ MCh$ Liabilities 11,319,320 11,319,320 11,126,412 11,126,412 Financial liabilities held for trading at fair value through profit or loss 11,319,320 11,319,320 11,126,412 11,126,412 Financial derivatives contracts 2,788,794 2,788,794 3,065,761 3,065,761 Financial derivative contracts for hedge accounting 45,051,218 45,712,785 46,323,348 46,886,640 Financial liabilities at amortised cost 14,086,226 14,086,226 13,764,266 13,806,513 Deposits and other demand liabilities 13,117,554 12,978,790 14,428,195 14,265,830 Time deposits and other term equivalents 8,223,783 8,864,765 8,235,688 8,795,417 Interbank borrowing 9,330,660 9,490,009 9,581,599 9,705,280 Debt and regulatory capital financial instruments issued 292,995 292,995 313,600 313,600 Other financial liabilities 1,017,968 1,017,968 1,078,760 1,078,760 Guarantees received for financial derivative transactions

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 44 - FAIR VALUE OF FINANCIAL ASSETS AND FINANCIAL LIABILITIES, continued The fair value approximates the book value of the following items, due to their short - term nature, for the following cases: cash and bank deposits, cash items in collection process and securities lending and repurchase agreements. Furthermore, the fair value estimates presented above are not intended to estimate the value of the Bank's profits generated by its business or future activities. They, therefore, do not represent the value of the Bank as a going concern. The methods used to estimate the fair value of financial instruments are detailed below. a. Debt financial instruments The estimated fair value of these financial instruments was established using market values or estimates from an available dealer or quoted market prices of similar financial instruments . Investments are valued at carrying value (recorded) as they are not considered to have a fair value significantly different from their historical one . To estimate the fair value of debt investments, the variables and additional elements (where applicable) were considered, including the estimated prepayment rates and the credit risk of the issuers . b. Interbank loans and receivables from customers The fair value of commercial loans, mortgage loans, credit cards and consumer loans are measured using discounted cash flow analysis . For this purpose, prevailing market interest rates are used regarding the product, term, amount and similar credit quality . The fair value of loans overdue by 90 days or more is measured using the market value of the associated collateral, discounted at the expected realisation rate and term . The estimated fair value is based on the book value for variable - rate loans whose interest rates frequently change (monthly or quarterly) and are not subject to any significant change in credit risk . c. Deposits and other demand obligations The disclosed fair value of non - interest bearing deposits and savings accounts is the amount payable at the reporting date and equal to the book value . The fair value of time deposits is calculated using the discounted cash flow method, which applies current interest rates offered to a schedule of monthly maturities expected in the market . d. Short and long - term issued debt instruments The fair value of these financial instruments is calculated using a discounted cash flow analysis based on the current incremental lending rates for similar loan types with similar maturities . e. Financial derivatives and hedge accounting contracts The estimated fair value of foreign exchange forward contracts was calculated using quoted market prices for financial instruments with similar characteristics . The fair value of interest rate swaps represents the estimated amount the Bank determines as the exit price under IFRS 13 . If there are no quoted market prices (direct or indirect) for any derivative instruments, the respective fair value estimates are calculated using valuation models and techniques such as Black - Scholes, Hull and Monte Carlo simulations . It considers relevant inputs such as option volatility, observable correlations between underlying values, counterparty credit risk, implied price volatility, the speed with which volatility reverts to its mean value and the linear relationship (correlation) between the value of a variable . Fair value measurement and hierarchy IFRS 13 'Fair Value Measurement' establishes a fair value hierarchy, which segregates the valuation technique's inputs and/or assumptions used to measure the fair value of financial instruments . The hierarchy prioritises unadjusted quoted prices in active markets for identical assets or liabilities (level 1 ) . The lowest priority is given to measures involving significant unobservable inputs or inputs (level 3 measures) . The three levels of the fair value hierarchy are as follows : In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 176

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 44 - FAIR VALUE OF FINANCIAL ASSETS AND FINANCIAL LIABILITIES, continued - Level 1: inputs are quoted (unadjusted) prices in active markets for identical assets and liabilities that the Bank can access at the measurement date. - Level 2: inputs other than quoted prices included in Level 1, which can be observed directly or indirectly for assets or liabilities. - Level 3: unobservable input data for the asset or liability. The estimated fair value of foreign exchange forward contracts was calculated using quoted market prices for financial instruments with similar characteristics. The fair value of interest rate swaps represents the estimated amount the Bank expects to receive or pay to terminate the contracts or agreements, considering the term structures of the interest rate curve, volatility of the underlying and the credit risk of the counterparties . In cases in which quotes cannot be observed, management makes its best estimate of the price that the market would set using its internal models, which in most cases use data based on observable market parameters as significant inputs (Level 2 ) and, in limited cases, use significant inputs that are not observable in market data (Level 3 ) . Various techniques are used to estimate it, including extrapolating observable market data . Financial instruments at fair value and determined by published quotations in active markets (Level 1) comprise: - Chilean Government and Treasury bonds - Mutual Funds If the instruments are not 100 % market observable, the price is a function of other market observable prices (Level 2 ) . The following financial instruments are classified in level 2 : In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 177 Description Valuation model used Type of financial instrument RiskAmerica provides the internal rates of return (IRR) according to the following criteria : On the valuation day, if there are one or more valid transactions in the Santiago Stock Exchange for a given mnemonic code, the reported rate is the weighted average of said rates . If there are no valid transactions for a given mnemonic data on the valuation day, the reported rate is an 'IRR baseline' from a reference structure plus a 'Model Spread' based on information from historical spreads of the same or similar documents . Present value of cash flows Mortgage and private bonds RiskAmerica provides the internal rates of return (IRR) according to the following criteria: On the valuation day, if there are one or more valid transactions in the Santiago Stock Exchange for a given mnemonic code, the reported rate is the weighted average of said rates. If there are no valid transactions for a given mnemonic code on the valuation day, the reported rate is an 'IRR baseline' from a reference structure plus a 'Model Spread' based on the 'Issuer curves' . Present value of cash flows Time deposits Rates (IRR) are provided by ICAP, GFI, Tradition and Bloomberg according to the following criteria: The published market prices are used to construct the valuation curve using the bootstrapping method, and then this curve is used to value the various derivatives. Present value of cash flows Constant Maturity Swap (CMS), Forward FX and Inflation, Cross Currency Swap (CCS), Interest Rate Swap (IRS) Formula adjusted by the volatility smile (implicit volatility). BGC Partners provide prices (volatilities) according to the following criteria: The volatility surface is built through interpolation using published market prices, and these volatilities are then used to value the options. Black - Scholes FX Options Transactions related to derivatives contracts such as Constant Maturity Swap (CMS), Forward FX and Inflation, Cross Currency Swap (CCS), Interest Rate Swap (IRS) and FX Options . Present value of cash flows Guarantees for threshold transactions, guarantee deposits In limited cases, unobservable inputs are used in market data (Level 3). Various techniques are used to estimate this, including extrapolating observable market data or a mix of observable data.

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 44 - FAIR VALUE OF FINANCIAL ASSETS AND FINANCIAL LIABILITIES, continued The following financial instruments are classified at level 3: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 178 The Bank estimates that any changes in the unobservable inputs for instruments classified as level 3 would not result in significant differences in the fair value measurement. The following table presents the assets and liabilities that are measured at fair value constantly: Fair value measurements Level 3 Level 2 Level 1 2023 As of March 31, MCh$ MCh$ MCh$ MCh$ Assets 13 11,510,284 121,587 11,631,884 Financial assets held for trading at fair value through profit or loss 13 11,490,781 - 11,490,794 Financial derivatives contracts - 19,503 121,587 141,090 Debt financial instruments 207,215 369,872 6,326,119 6,903,206 Financial assets at fair value through other comprehensive income 442 9,533 6,326,119 6,336,094 Debt financial instruments 206,773 - - 206,773 Other financial instruments - 360,339 - 360,339 Financial derivative contracts for hedge accounting - 2,993,244 - 2,993,244 Guarantee money deposits 207,228 14,873,400 6,447,706 21,528,334 Total Liabilities - 11,126,412 - 11,126,412 Financial liabilities held for trading at fair value through profit or loss - 11,126,412 - 11,126,412 Financial derivatives contracts - 3,065,761 - 3,065,761 Financial derivative contracts for hedge accounting - 1,078,760 - 1,078,760 Guarantees for threshold operations - 15,270,933 - 15,270,933 Total Description Valuation model used Type of financial instrument There is no observable input of implied volatility. Black Normal model for Cap/Floors and Swaptions Caps/Floors/Swaptions There is no observable input of implied volatility. Black - Scholes Hybrid HW model for rates and Brownian motion for FX. There is no observable input of implied volatility. Hull - White Start Fwd is unsupported by Murex (platform) due to the UF forward estimate. Implicit Forward Rate Agreement (FRA) Valuation obtained using yield curve interpolating to maturity of flows. Nevertheless, TAB is not a directly observable variable nor correlated to any market input. Present value of cash flows CCS, IRS, CMS in Active Bank Rate (TAB) Valuation using prices of instruments with similar characteristics plus a liquidity charge - off rate. Present value of cash flows Rates (IRR) are provided by ICAP, GFI, Tradition and Bloomberg according to the following criteria: The published market prices are used to construct the valuation curve using the bootstrapping method, and then this curve is used to value the various derivatives. Present value of cash flows CCS (maturities over 25 years) Valuation by the stochastic dynamic model to obtain the discount rate. Spread over risk - free Recognition bonds Measured by discounting the estimated cash flow using the interest rate of the new contracts. Present value of cash flows Receivables accounts valued at fair value

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 44 - FAIR VALUE OF FINANCIAL ASSETS AND FINANCIAL LIABILITIES, continued In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 179 Fair value measurements Level 3 Level 2 Level 1 2022 As of December 31, MCh$ MCh$ MCh$ MCh$ Assets 38 11,672,922 154,046 11,827,006 Financial assets held for trading at fair value through profit or loss 38 11,672,922 - 11,672,960 Financial derivatives contracts - - 154,046 154,046 Debt financial instruments 142,738 9,894 5,870,407 6,023,039 Financial assets at fair value through other comprehensive income 432 9,894 5,870,407 5,880,733 Debt financial instruments 142,306 - - 142,306 Other financial instruments - 477,762 - 477,762 Financial derivative contracts for hedge accounting - 2,442,327 - 2,442,327 Guarantee money deposits 142,776 14,602,905 6,024,453 20,770,134 Total Liabilities - 11,319,320 - 11,319,320 Financial liabilities held for trading at fair value through profit or loss - 11,319,320 - 11,319,320 Financial derivatives contracts - 2,788,794 - 2,788,794 Financial derivative contracts for hedge accounting - 1,017,967 - 1,017,967 Guarantees for threshold operations - 15,126,081 - 15,126,081 Total The following tables present assets and liabilities that are not measured at fair value repeatedly in the consolidated statement of financial position: Fair value measurements Level 3 Level 2 Level 1 2023 As of March 31, MCh$ MCh$ MCh$ MCh$ Assets Debt financial instruments at amortised cost - - 4,403,482 4,403,482 Debt financial instruments 38,514,464 - - 38,514,464 Interbank loans and receivables from customers 38,514,464 - 4,403,482 42,917,946 Total Liabilities Financial liabilities at amortised cost 13,764,266 - - 13,764,266 Deposits and other demand liabilities - 14,428,195 - 14,428,195 Time deposits and other term equivalents - 8,235,688 - 8,235,688 Interbank borrowing - 9,581,599 - 9,581,599 Debt and regulatory capital financial instruments issued - 313,600 - 313,600 Other financial liabilities 13,764,266 32,559,082 - 46,323,348 Total

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 44 - FAIR VALUE OF FINANCIAL ASSETS AND FINANCIAL LIABILITIES, continued In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 180 Fair value measurements Level 3 Level 2 Level 1 2022 As of December 31, MCh$ MCh$ MCh$ MCh$ Assets Debt financial instruments at amortised cost - - 4,496,503 4,496,503 Debt financial instruments 39,342,256 - - 39,342,256 Interbank loans and receivables from customers 39,342,256 - 4,496,503 43,838,759 Total Liabilities Financial liabilities at amortised cost 14,086,226 - - 14,086,226 Deposits and other demand liabilities - 13,117,554 - 13,117,554 Time deposits and other term equivalents - 8,223,783 - 8,223,783 Interbank borrowing - 9,330,660 - 9,330,660 Debt and regulatory capital financial instruments issued - 292,995 - 292,995 Other financial liabilities 14,086,226 30,964,992 - 45,051,218 Total The fair value of other assets and other liabilities approximates its book value. The methods and assumptions for estimating fair value are defined below: - Loans and amounts owed by credit institutions and by customers : Fair value is estimated for groups of loans with similar characteristics . The fair value was measured by discounting the estimated cash flow using the interest rate of the new contracts . First, the future cash flow of the current loan portfolio is estimated using contractual rates . Then the new loans distributed over the risk - free interest rate are incorporated into the (risk - free) yield curve to calculate the loan portfolio at fair value . Regarding behavioural assumptions, it is important to underline that a prepayment rate is applied to the loan portfolio, resulting in a more realistic future cash flow . - Deposit and Bank Borrowings : The fair value of deposits was calculated by discounting the difference between the cash flows on a contractual basis and prevailing market rates for instruments with similar maturities . The book value was considered to approximate the fair value for variable - rate deposits . - Debt instruments issued and other financial obligations : The fair value of long - term borrowings was estimated using the discounted cash flow to the interest rate presented in the market with similar terms and maturities . The valuation techniques used to estimate each level are defined in Note 2. There were no transfers between Tiers 1 and 2 for the year ended on March 31, 2023, and 2022. The following table presents the Bank's activity for assets and liabilities measured at fair value repeatedly using significant unobserved inputs (level 3 ) as of March 31 , 2023 , and December 31 , 2022 :

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 44 - FAIR VALUE OF FINANCIAL ASSETS AND FINANCIAL LIABILITIES, continued In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 181 Liabilities Assets MCh$ MCh$ - 142,776 As of January 1, 2023 Total realised and unrealised profit (loss): - 64,565 Included in profit - (113) Included in comprehensive income - - Acquisitions, issues and placements (net) - - Level transfers - 207,228 As of March 31, 2023 - 64,452 Total profit or loss included in profit or loss as of March 31, 2023, attributable to the change in unrealised profit (loss) relating to assets or liabilities as of December 31, 2022 Liabilities Assets MCh$ MCh$ - 100,814 As of January 1, 2022 Total realised and unrealised profit (loss): - 42,085 Included in profit - (123) Included in comprehensive income - - Acquisitions, issues and placements (net) - - Level transfers - 142,776 As of December 31, 2022 - 41,962 Total profit or loss included in profit or loss as of December 31, 2022, attributable to the change in unrealised profit (loss) relating to assets or liabilities as of December 31, 2021 The quarterly Local Risk Factor Internal Committee reviews the cases in which transfers are to be made between the different levels . During the year 2023 , the Committee decided to reclassify instruments from level 3 to level 2 . Realised and unrealised profit (loss) included in results as of March 31 , 2023 , and 2022 , on assets and liabilities measured at fair value regularly through significant unobservable inputs (Level 3 ) are recorded in the Interim Consolidated Income Statements under 'Net income from financial operations' . The potential effect as of March 31 , 2023 , and 2022 on the continuous valuation of assets and liabilities measured at fair value through significant unobservable inputs (Level 3 ) – which stem from a change in key assumptions in case using other reasonably possible assumptions is more or less favourable than those used — is not considered significant to the Bank .

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 44 - FAIR VALUE OF FINANCIAL ASSETS AND FINANCIAL LIABILITIES, The following tables show the financial instruments subject to compensation according to IAS 32 for 2023 and 2022: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 182 Linked financial instruments offset on the balance sheet Amount in the statement of financial position Residuals of financial instruments that are not linked and/or not subject to compensation Net amount presented in the balance sheet Amounts offset on the balance sheet Gross imports As of March 31, 2023 MCh$ MCh$ MCh$ MCh$ MCh$ Assets 11,851,133 578,882 11,272,251 - 11,272,251 Financial derivatives contracts and hedge accounting (*) - - - - - Repurchase and securities lending contracts 37,859,674 37,859,674 - - - Interbank loans and receivables from customers 49,710,807 38,438,556 11,272,251 - 11,272,251 Total Liabilities 14,192,173 741,535 13,450,638 - 13,450,638 Financial derivatives contracts and hedge accounting (*) 456,118 - 456,118 - 456,118 Repurchase and securities lending contracts 36,867,760 36,867,760 - - - Deposits and obligations with banks 51,516,051 37,609,295 13,906,756 - 13,906,756 Total (*) These items include guarantees of MCh$2,491,414 and MCh$900,273 for derivative assets and liabilities, respectively. Linked financial instruments offset on the balance sheet Amount in the statement of financial position Residuals of financial instruments that are not linked and/or not subject to compensatio n Net amount presented in the balance sheet Amounts offset on the balance sheet Gross imports As of December 31, 2022 MCh$ MCh$ MCh$ MCh$ MCh$ Assets 12,150,722 1,870,431 10,280,291 - 10,280,291 Financial derivatives contracts and hedge accounting (*) - - - - - Repurchase and securities lending contracts 37,692,840 37,692,840 - - - Interbank loans and receivables from customers 49,843,562 39,563,271 10,280,291 - 10,280,291 Total Liabilities 14,108,114 2,742,833 11,365,281 - 11,365,281 Financial derivatives contracts and hedge accounting (*) 315,355 - 315,355 - 315,355 Repurchase and securities lending contracts 35,929,781 35,929,781 - - - Deposits and obligations with banks 50,353,250 38,672,614 11,680,636 - 11,680,636 Total (*) These items include guarantees of MCh$1,695,431 and MCh$746,729 for derivative assets and liabilities, respectively.

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31 , 2023 , and 2022 , and as of December 31 , 2022 NOTE 44 - FAIR VALUE OF FINANCIAL ASSETS AND FINANCIAL LIABILITIES, continued To reduce the credit exposure on its financial derivatives transactions, the Bank has entered into bilateral collateral agreements with its counterparties, setting out the terms and conditions under which they operate . In general terms, collateral (received/delivered) operates when the net fair value of the financial instruments held exceeds the thresholds defined in the respective contracts . Financial derivative contracts are listed below, according to their collateral agreement : In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 183 As of December 31, 2022 As of March 31, 2023 Liabilities Assets Liabilities Assets Financial derivatives contracts and hedge accounting MCh$ MCh$ MCh$ MCh$ 9,588,768 8,177,074 11,932,320 10,537,694 Derivative contracts with a zero - threshold collateral agreement 536,318 440,091 1,326,208 734,928 Derivative contracts with non - zero - threshold collateral agreement 3,983,028 3,533,557 933,645 578,511 Derivative contracts without collateral agreement 14,108,114 12,150,722 14,192,173 11,851,133 Total financial derivatives

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 45 - MATURITY OF FINANCIAL ASSETS AND LIABILITIES ACCORDING TO REMAINING MATURITIES As of March 31, 2023, and December 31, 2022, the detail of the maturity of financial assets and liabilities according to their remaining maturities is as follows: As of March 31, 2023 On demand MCh$ Up to 1 month MCh $ Between 1 to 3 months MCh$ Between 3 to 12 months MCh$ Between 1 to 3 years MCh$ Between 3 to 5 years MCh$ More than 5 years MCh $ Total MCh$ Financial assets In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 184 changes in income hedge accounting securities lending agreements amortised cost (1) customers (3) 2,586,609 - - - - - - Cash and bank deposits 2,586,609 865,384 - - - - - - Cash in collection process 865,384 141,090 69,316 - 71,337 437 - - Debt instruments at fair value with - 6,336,100 1,623,906 529,685 1,879 250,647 70,818 3,859,165 Debt instruments at fair value with changes in other comprehensive - income 11,851,133 3,865,860 1,661,405 3,412,017 1,969,131 496,647 446,073 Financial derivative contracts and - - - - - - - - Rights under repurchase and - 4,756,840 - - 4,756,840 - - - Debt financial instruments at - 32,873 - - - - - 32,873 Interbank loans (2) - 37,878,264 14,213,763 4,469,812 7,969,503 4,951,476 2,918,441 3,455,236 Loans and receivables from 900,033 2,993,244 - - - - - - Guarantee money deposits 2,993,244 68,441,537 19,772,845 6,660,902 16,211,576 7,171,691 3,485,906 7,793,347 Total financial assets 7,345,270 hedge accounting equivalents securities lending agreements instruments issued More Between 3 Between 1 than 5 Between 3 Between 1 to 12 to 3 Up to 1 As of March 31, 2023 Total years to 5 years to 3 years months months month On demand MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Financial liabilities 791,211 - - - - - - Cash in collection process 791,211 14,192,173 3,995,319 2,079,430 4,785,188 2,272,453 594,526 465,257 Financial derivative contracts and - 13,806,513 - - - - - - Deposits and other demand liabilities 13,806,513 14,265,830 26,609 5,377 262,864 3,000,526 3,936,283 6,843,608 Time deposits and other term 190,563 456,418 - - - 111 182,143 274,164 Obligations under repurchase and - 8,795,417 - - 5,677,628 2,211,604 829,197 48,960 Interbank borrowing 28,028 9,705,280 4,079,724 1,742,631 2,656,005 975,350 99,565 152,005 Debt and regulatory capital financial - 313,600 - 75 142 - - 313,383 Other financial liabilities - 132,939 29,303 31,467 46,505 25,664 - - Obligations under leasing contracts - 1,078,760 - - - - - - Guarantee money deposits 1,078,760 63,538,141 8,130,955 3,858,980 13,428,332 8,485,708 5,641,714 8,097,377 Total financial liabilities 15,895,075 (1) Debt financial instruments are presented on a gross basis; the amount of the provision is MCh$1,100. (2) Amounts due from banks are presented on a gross basis; the amount of the provision is MCh$45. (3) Loans and receivables are presented on a gross basis; the amount of provisions is MCh$1,051,418.

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 45 - MATURITY OF FINANCIAL ASSETS AND LIABILITIES ACCORDING TO REMAINING MATURITIES, continued As of December 31, 2022 On demand MCh$ Up to 1 month MCh $ Between 1 to 3 months MCh$ Between 3 to 12 months MCh$ Between 1 to 3 years MCh$ Between 3 to 5 years MCh$ More than 5 years MCh$ Total MCh$ Financial assets changes in income changes in other comprehensive income accounting lending agreements cost (1) (3) 1,982,942 - - - - - - Cash and bank deposits 1,982,942 843,816 - - - - - - Cash in collection process 843,816 154,046 12,653 23,277 3,880 70 114,165 1 Debt instruments at fair value with - 5,880,733 1,888,950 559,210 2,167 68,973 744,182 2,617,251 Debt instruments at fair value with - 12,150,723 3,923,382 2,026,248 3,396,062 1,499,473 570,803 734,755 Financial derivative contracts and hedge - - - - - - - - Rights under repurchase and securities - 4,867,591 - 2,225,346 2,545,919 - 96,326 - Debt financial instruments at amortised - 32,955 - - - - - 32,955 Interbank loans (2) - 38,696,410 14,066,625 4,431,396 7,943,135 5,158,378 2,980,575 3,402,788 Loans and receivables from customers 713,513 2,442,327 - - - - - - Guarantee money deposits 2,442,327 67,050,832 19,891,610 9,265,477 13,891,163 6,726,894 4,506,051 6,787,750 Total financial assets 5,981,887 accounting In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 185 equivalents securities lending agreements instruments issued Total More than 5 years Between 3 to 5 years Between 1 to 3 years Between 3 to 12 months Between 1 to 3 months Up to 1 month On demand As of December 31, 2022 MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Financial liabilities 746,872 - - - - - - Cash in collection process 746,872 14,108,114 4,245,898 2,415,134 4,686,662 2,541,236 151,948 67,236 Financial derivative contracts and hedge - 14,086,226 - - - - - - Deposits and other demand liabilities 14,086,226 12,978,790 - - 25,934 - 5,806 12,712,880 Time deposits and other term 234,170 315,355 - - - 109 103,516 211,730 Obligations under repurchase and - 8,864,765 - - 5,584,094 2,288,492 818,030 149,482 Interbank borrowing 24,667 9,490,009 4,272,288 1,715,753 2,809,572 334,107 62,084 92,205 Debt and regulatory capital financial - 292,995 - 97 142 - - 292,756 Other financial liabilities - 137,089 31,447 32,785 46,955 25,902 - - Obligations under leasing contracts - 1,017,968 - - - - - - Guarantee money deposits 1,017,968 62,038,183 8,749,633 4,163,769 13,153,359 5,189,846 1,141,384 13,530,289 Total financial liabilities 16,109,903 (1) Debt financial instruments are presented on a gross basis; the amount of the provision is MCh$894. (2) Amounts due from banks are presented on a gross basis; the amount of the provision is MCh$36. (3) Loans and receivables are presented on a gross basis; the amount of provisions is MCh$1,036,525.

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 46 - FINANCIAL AND NON - FINANCIAL ASSETS AND LIABILITIES BY CURRENCY The following are the amounts of financial and non - financial assets and liabilities for the most relevant currencies at the end of the year ended on March 31, 2023, and December 31, 2022. In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 186 As of March 31, 2023 Foreign Currency Local Currency Other COP CNY JPY CHF GBP EUR USD Adjustable by exchange rate CLF CLP MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ 10,073 - 60 10,690 3,904 12,766 176,902 6,323,497 94,657 24,061,412 33,908,542 Financial assets 6 - - 3 779 277 1,467 2,739,598 11 178,898 1,982,226 Non - financial assets 10,079 - 60 10,693 4,683 13,043 178,369 9,063,095 94,668 24,240,310 35,890,768 TOTAL ASSETS 128,833 - - 215,659 672,835 11,054 486,079 10,551,988 - 7,637,228 42,622,766 Financial liabilities 1,356 - - 169 1,355 23 61,095 1,010,555 - 167,089 1,903,393 Non - financial liabilities 130,189 - - 215,828 674,190 11,077 547,174 11,562,543 - 7,804,317 44,526,159 TOTAL LIABILITIES As of December 31, 2022 Foreign Currency Local Currency Other COP CNY JPY CHF GBP EUR USD Adjustable by exchange rate CLF CLP MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ 3,403 - 117 17,849 3,181 15,804 150,370 6,305,859 111,018 23,698,931 33,409,175 Financial assets 3 - - - 809 34 1,506 2,338,517 12 186,188 1,921,828 Non - financial assets 3,406 - 117 17,849 3,990 15,838 151,876 8,644,376 111,030 23,885,119 35,331,003 TOTAL ASSETS 135,089 - 7 225,558 710,381 1,267 440,062 10,209,855 1 7,805,156 41,492,839 Financial liabilities 1,526 - 1 144 1,433 18 918 1,001,061 42 44,426 1,856,448 Non - financial liabilities 136,615 - 8 225,702 711,814 1,285 440,980 11,210,916 43 7,849,582 43,349,287 TOTAL LIABILITIES The fair value of derivative instruments is shown in Chilean Peso currency, and the notional amount is not included.

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31 , 2023 , and 2022 , and as of December 31 , 2022 NOTE 47 - RISK MANAGEMENT AND REPORTING General information The Bank has a solid risk culture, which defines how risks are understood and managed, based on the principle that all employees are responsible for their management . Therefore, their classification is fundamental for their effective control . In this respect, the Bank has established the following key risks in its corporate framework : Credit risk: the risk that one party to a financial instrument contract will fail to meet its contractual obligations because of the insolvency or incapacity of the natural or legal persons and will cause the other party to incur a financial loss. Market risks: arise from holding financial instruments whose value may be affected by changes in market conditions; they generally include the following types of risk: - Foreign exchange risk arises from changes in the exchange rate between currencies. - Fair value interest rate risk arises from changes in market interest rates. - Price risk arises from changes in market prices, either due to factors specific to the instrument itself or factors affecting all instruments traded in the market. - Inflation risk arises due to changes in inflationary indices in Chile, which would apply mainly to financial instruments denominated in UF. Liquidity risk : it is the possibility that an entity may be unable to meet its payment commitments or that, to meet them, it may have to raise funds with onerous terms or risk damage to its image and reputation . Operational risk : it refers to risk arising from human error, systems error, fraud or external events which could cause the Bank reputational loss, have legal or regulatory implications or cause financial loss . Capital risk : it is the risk that the Bank has insufficient capital quantity and/or quality to meet the minimum requirements to operate as a bank, respond to market expectations regarding its credit capacity and support the growth of its business and any strategies that may emerge per its strategic plan . Banco Santander's risk management and control principles are mandatory, must always be applied, and comprise the regulatory requirements and best practices . They are : 1. A strong risk culture that all employees follow covers all risks and promotes socially responsible management, contributing to the Bank's long - term sustainability . 2. All employees are responsible for risk management and must know and understand the risks generated by their daily activities . They must avoid taking risks whose impact is unknown or exceeds the Bank's risk appetite limits . 3. Involvement of senior management in ensuring consistent risk management and control through their conduct, actions, and communications . This body promotes the risk culture, assessing its degree of implementation and monitoring that the profile remains within the levels defined in the Bank's risk appetite . 4. Independence of risk management and control functions. 5. Proactive and comprehensive risk management and control approach across all businesses and risk types. 6. Proper and comprehensive information management enables risks to be identified, assessed, managed and communicated appropriately at the appropriate levels . These principles, together with several interconnected tools and processes of the strategy, such as the risk appetite, risk profile assessment, scenario analysis, risk reporting structure, and annual budget processes, all articulate a holistic control structure for the entire Bank . In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 187

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31 , 2023 , and 2022 , and as of December 31 , 2022 NOTE 47 - RISK MANAGEMENT AND REPORTING, continued Risk governance The Bank has a robust risk governance structure that pursues effective control of the risk profile, consistent with the appetite defined by the Board and based on the distribution of roles among the three lines of defence and a strong committee structure, which is reinforced by the Risk Pro culture that permeates the entire organisation . The Bank's three lines of defence model aim to ensure effective risk management and control : First line Business lines and all other risk - creating functions are the first lines of defence . These functions must ensure their risks align with the approved risk appetite and corresponding limits . Any unit that originates risk has primary responsibility for managing said risk . Second line The Risk and Compliance and Conduct functions . Its role is to independently monitor and challenge the risk management activities of the first line of defence . These functions ensure risk management under the appetite defined by the Board and promote a strong risk culture throughout the organisation . Third line The Internal Audit function regularly assesses that policies, methodologies, and procedures are adequate and effectively implemented in managing and controlling all risks . Risk committee structure The Board of Directors is responsible for establishing and monitoring the Bank's risk management structure . It has a corporate governance system aligned with local regulations and international best practices . For proper functioning, the Bank has several key high - level committees, each of which is composed of directors and executive members of Santander's management : A. Comprehensive Risk Committee (CIR) The Board's Comprehensive Risk Committee is the body responsible for advising the Board on the definition of the risk appetite that the business areas may assume and supervising the correct identification, measurement, and control of all risks that may affect the Bank . In addition, this committee acts as a governance body through which the Board oversees the reasonableness of risk measurement and control systems . The Board of Directors has delegated responsibility for credit risk management to the Bank's Comprehensive Risk Committee (CIR) and the Bank's Risk Division . B. Directors and Audit Committee The main responsibility of this Committee is to support the Board of Directors in the ongoing improvement of internal control, which includes reviewing the work of the external auditors and the Internal Audit Department and overseeing the process of generating the financial statements . The Committee is also responsible for analysing the observations made by the Chilean financial system regulators on the Bank and for recommending measures to be taken by management . The external auditors are recommended by this Committee to the Board of Directors and appointed by the shareholders at the annual meeting . C. Asset - Liability Committee (ALCO) ALCO's main functions are monitoring and controlling structural balance sheet risks, such as inflation exposure limits, interest rate risk, capital funding levels and liquidity . Furthermore, a review of developments in the most relevant local and international monetary markets and policies . In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 188

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31 , 2023 , and 2022 , and as of December 31 , 2022 NOTE 47 - RISK MANAGEMENT AND REPORTING, continued D. Market Committee The Market Committee is responsible for establishing the Bank's policies, procedures, and limits regarding its trading portfolio, making estimates of domestic and international economic conditions that can be used for position - taking . Review of the results of the Bank's customer treasury business . E. Risk Division The Board delegates the identification, measurement and control of the various risks faced by the Bank to the Risk Division, which is led by the Chief Risk Officer (CRO), reporting directly to the General Manager (in conjunction with the Comprehensive Risk Committee) . The Chief Risk Officer (CRO) is responsible for monitoring all risks and reviewing and advising the business lines on managing these risks . The areas of credit risk, market risk (including liquidity and structural), operational risk, strategic risk, model risk, compliance risk and reputational risk report to this division . CREDIT RISK Credit risk is the risk that one party to a financial instrument contract will fail to meet its contractual obligations due to the insolvency or incapacity of the natural or legal persons and will cause the other party to incur a financial loss . The Bank consolidates all elements and components of credit risk exposure (e . g . individual creditor default risk, business line or sector inherent risk, and/or geographical risk) for credit risk management purposes . Credit risk management The Bank has set up a set of credit approval committees in which teams from the Board of Directors, the Risk Division, and the commercial areas participate, jointly verifying each loan applicant's quantitative and qualitative parameters . The Board has delegated responsibility for credit risk management to the Integrated Risk Committee (IRC) and the Bank's risk departments, whose roles are summarised below : - Formulation of credit policies, in consultation with the business units, covering collateral requirements, credit assessment, risk rating and reporting, documents and legal procedures in compliance with regulatory, legal and internal Bank requirements . - Establishing the authorisation structure for the approval and renewal of credit applications . The Bank structures credit risk levels by limiting the concentration of credit risk in terms of individual debtors, groups of debtors, industry segments and countries . - Authorisation limits assignment to the respective business unit officers (commercial, consumer, SME) to be monitored on an ongoing basis by the administration . Furthermore, these limits are regularly reviewed . Risk assessment teams at the branch level regularly interact with clients, yet, for large operations, the risk teams at the head office and even the Risk Committee collaborate directly with clients in assessing credit risks and preparing credit applications . - Limiting exposure concentrations to customers, counterparties, in geographic areas, industries (for receivables or credits), and credit rating and liquidity (for investments) by the issuer . - Developing and maintaining the Bank's risk classification to categorise risks by the exposure to financial loss of the respective instruments and to focalise risk management, specifically on the related risks . - Reviewing and assessing credit risk . The risk divisions are largely independent of the Bank's commercial division and assess all credit risks above designated limits before customer credit approvals or specific investments acquisition . Credit renewals and reviews are subject to similar processes . The risk assessment teams regularly interact with our clients . Risk teams collaborate directly with clients to assess credit risks and prepare credit applications for larger transactions . Credit approval committees, including risk and commercial staff, must In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 189

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31 , 2023 , and 2022 , and as of December 31 , 2022 NOTE 47 - RISK MANAGEMENT AND REPORTING, continued ensure that each applicant meets appropriate qualitative and quantitative parameters . The Bank's Board of Directors defines the powers of each committee . In preparing a credit application for a corporate customer whose loans are approved on an individual basis, the Bank verifies various parameters such as debt servicing capacity (including, typically, projected cash flows), the customer's financial history and/or projections for the economic sector in which it operates . The risk division is actively involved in this process and prepares the credit application for the customer . All applications contain an analysis of the client's strengths and weaknesses, a rating and a recommendation . Credit limits are not determined based on outstanding customer balances but the financial group's direct and indirect credit risk . For example, a corporation would be assessed with its subsidiaries and affiliates . Their respective risk divisions assess and approve consumer loans (individuals, SMEs) . The assessment is based on an evaluation system known as Garra (Banco Santander - Chile), an automated process with a scoring system that includes the credit risk policies implemented by the Bank's Board of Directors . The credit application process is based on collecting information to determine the client's financial situation and ability to pay . The parameters used to assess the applicant's credit risk include several variables such as income levels, length of current employment, indebtedness, and credit bureau reports . For investments in debt instruments, the Bank assesses the probability of Non - collectability or default of issuers or counterparties using internal and external assessments such as the Bank's independent risk assessors . Furthermore, the Bank adheres to a strict and conservative policy that ensures that the investment issuers and counterparties to derivative transactions have the highest reputation . Furthermore, the Bank operates several instruments which, although they involve exposure to credit risk, are not reflected in the Interim Consolidated Statements of Financial Position, such as guarantees and sureties, documentary letters of credit, letters of guarantee and commitments to extend credit . Guarantees and sureties represent an irrevocable payment obligation . If a guaranteed customer defaults on its obligations to third parties guaranteed by the Bank, the Bank will make the corresponding payments . These transactions involve the same credit risk exposure as ordinary loans . Documentary letters of credit are commitments recorded by the Bank on behalf of the customer . They are secured by the traded goods they relate to and have a lower risk than direct borrowing . The guaranteed bonds are contingent commitments that become effective only if the customer fails to perform the works agreed with a third party, as guaranteed by the bonds . In the case of commitments to extend credit, the Bank is potentially exposed to losses equal to the total unused commitment . Nevertheless, the likely amount of loss is less than the unused total of the commitment . In addition, the Bank monitors the maturity period of the credit lines because long - term commitments generally have a higher credit risk than short - term commitments . Regarding provisions, on July 17 , 2020 , the CMF requested the determination of specific provisions for loans backed by Fogape guarantees, for which expected losses must be determined, estimating the risk of each transaction, without considering the substitution of the credit quality of the guarantee, according to the appropriate individual or group analysis method, under the provisions of Chapter B - 1 of the CASB . See Note 2 , letter q . The balance of provisions for this item as of March 31 , 2023 , and December 31 , 2022 , amounted to MCh $ 17 , 633 and MCh $ 19 , 424 , respectively . In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 190

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31 , 2023 , and 2022 , and as of December 31 , 2022 NOTE 47 - RISK MANAGEMENT AND REPORTING, continued Additional provisions According to FMC regulation, banks can establish provisions over the already described limits to protect themselves from the risk of non - predictable economic fluctuations that could affect the macroeconomic environment or a specific economic sector . These provisions shall be reported under liabilities per number 9 of Chapter B - 1 of the FMC's CASB . Due to the spread of the pandemic, the presence of new variants of the virus and the decrease in state aid in the coming months, the Bank's Board of Directors approved the creation of additional voluntary provisions in 2022 for MCh $ 35 , 000 , in 2021 for MCh $ 132 , 000 , which added to those approved in 2020 , amount to MCh $ 258 , 000 . As of March 31 , 2023 , additional provisions amount to MCh $ 293 , 000 . Maximum credit risk exposure For financial assets recognised in the Interim Consolidated Statements of Financial Position, the exposure to credit risk is equal to their carrying amount . The maximum credit risk exposure for financial guarantees granted is the maximum amount the Bank would have to pay if the guarantee were enforced . The following is the distribution by financial asset of the Bank's maximum credit risk exposure as of March 31 , 2023 , and December 31 , 2022 , without deducting collateral and credit enhancements received : In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 191

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 47 - RISK MANAGEMENT AND REPORTING, continued In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 192 As of December 31, 2022 As of March 31, 2023 Amount of exposure Amount of exposure MCh$ MCh$ Note 1,982,942 2,586,609 7 Deposits in banks 843,816 865,384 7 Cash in collection process 8 Financial assets held for trading at fair value through profit or loss 11,672,960 11,490,794 Financial derivatives contracts 154,046 141,091 Debt instruments 11 Financial assets at fair value through other comprehensive income 5,880,733 6,336,100 Debt instruments 142,306 206,773 Credits and receivables from clients 477,762 360,339 12 Financial derivative contracts for hedge accounting 13 Financial assets at amortised cost 4,867,591 4,755,740 Debt instruments 32,955 32,828 Interbank loans 37,659,885 37,826,846 Credits and receivables from clients Unrecognised loan/credit commitments: 255,522 217,489 Letters of credit for goods movement transactions 1,476,599 1,419,209 Transactions related to contingent events 8,974,077 8,886,808 Immediately repayable unrestricted credit lines 924,173 654,221 Guarantees and sureties 1,617 1,355 Contingent credits linked to CAE 313,345 339,454 Other credit commitments 75,660,329 76,121,040 Total Under the new CASB, the provisions for credit risk on loans and receivables (due from banks and loans and receivables from customers) and contingent credits are determined under the criteria defined in Chapters B - 1 to B - 3 of the new CASB . While debt instruments are measured at amortised cost and fair value through other comprehensive income, their impairment is measured under Chapter 5 . 5 of IFRS 9 . Debt instruments measured at fair value through profit or loss are not subject to impairment requirements . In the case of derivatives, the fair value of derivatives includes the adjustment reflecting the counterparty credit risk (CVA) . The CVA is calculated considering the potential exposure to each counterparty in future periods . The methodology established for determining provisions for loan losses and contingent loans is set out in Note No 2 of accounting principles letter q) . In addition, the methodology used for calculating provisions for debt instruments measured at amortised cost and those measured at fair value through other comprehensive income is described in Note 2 (r) . Information related to the concentration of credit risk is provided in Note 13 , letters k, m, and n . For derivative instruments, as of March 31 , 2023 , the Bank's foreign exposure, including counterparty risk in the derivatives portfolio, was US $ 4 million . The table below calculates the derivative exposure using the corresponding credit risk, which is equal to the net replacement value plus the maximum potential value, considering cash collateral that mitigates the exposure . Additional details regarding our exposure to countries rated above 1 and corresponding to the largest exposures are also included . The exposure as of March 31 , 2023 , considering the fair value of derivative instruments, amounts to : Total Financial Derivative instruments exposure investments Credits Deposits (Market - adjusted) US$ million US$ million US$ million US$ million US$ million Ranking Domestic Loans 6 - 3 3 - 2 Hong Kong 4 - - - 4 3 México 19 - 19 - - 2 China 29 - 22 3 4 Total

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 47 - RISK MANAGEMENT AND REPORTING, continued Our exposure to Spain within the group is as follows: Total exposure Financial investments Credits Deposits Derivative instruments (market - adjusted) Classification Domestic Loans Counterpart in US$ million 318 - - 38 280 1 Spain Banco Santander SA (*) Our exposure to Santander Hong Kong, BSCH Spain and Santander NY is included as exposure to Spain . Recognition and measurement of credit risk provisions The Bank segments loans and contingent credits by the type of obligor and credit to a level appropriate for applying the models . Provisions required to cover loans and contingent credit exposures are calculated and set up monthly in relation to the valuation models used and the type of transaction . See Note 2 (q) . Provisions on the loan portfolio are treated as valuation accounts for the respective assets . Accordingly, the amount of the portfolio net of provisions is reported in the Interim Consolidated Statements of Financial Position . Additional and contingent provisions are reported under liabilities . See Note 13 . The following is a breakdown of the loans (due from banks and receivables from customers) and contingent credit exposures and related provisions as of March 31 , 2023 , and December 31 , 2022 : ovisions assets before pr Financial Non - performing Portfolio Substandard Portfolio Normal Portfolio As of March 31, 2023 (**) MCh$ Evaluation Evaluation Evaluation Group Individual Individual Group Individual rovisions Established p Deductibl e FOGAPECo vid - 19 guarantee s Non - performing Portfolio Substandard Portfolio Normal Portfolio Evaluation Evaluation Evaluation Group Individual Individual Group Individual - - - - - 45 - - - - 32,873 Interbank loans 17,633 192,909 216,431 37,083 76,230 91,986 397,019 693,072 1,109,645 4,451,651 10,856,411 Commercial loans - 90,333 - - 31,144 - 502,268 - - 15,527,601 - Mortgage loans - 128,088 - - 169,581 - 202,317 - - 5,138,280 - Consumer loans - 4,225 5,095 9,275 6,088 14,288 5,920 9,231 172,268 748,896 1,759,494 Contingent credit exposure ** See Note 13 letters c, d and e for further details. ovisions assets before pr Financial Non - performing Portfolio Substandard Portfolio Normal Portfolio As of December 31, 2022 (**) MCh$ Evaluation Evaluation Evaluation Group Individual Individual Group Individual rovisions Established p Deductibl e FOGAPECo vid - 19 guarantee s Non - performing Portfolio Substandard Portfolio Normal Portfolio Evaluation Evaluation Evaluation Group Individual Individual Group Individual - - - - - 36 - - - - 32,991 Interbank loans 19,424 186,830 220,089 36,420 81,181 97,070 368,702 698,790 1,110,717 4,554,140 10,952,240 Commercial loans - 76,998 - - 29,593 - 422,064 - - 15,306,945 - Mortgage loans - 120,801 - - 168,119 - 179,593 - - 5,103,219 - Consumer loans - 3,546 4,377 8,873 6,137 15,036 4,883 8,464 52,267 863,867 2,118,902 Contingent credit exposure ** See Note 13 letters c, d and e for further details . Provisions for debt instruments are obtained monthly, under the IFRS 9 models developed and approved in the respective committees, and under appropriate governance . Those measured at amortised costs are accounted for in valuation accounts by deducting the asset's value and the corresponding effect on profit or loss . Those measured at fair value through other comprehensive income are accounted for based on the fair value recorded in 'OCI' against profit or loss for the period . Provisions for loans and receivables measured at fair value through other comprehensive income (OCI) are calculated together with due from banks and loans receivables measured at amortised cost . As of March 31 , 2023 , and December 31 , 2022 , the impairment that concerns the instruments detailed above is : In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 193

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 47 - RISK MANAGEMENT AND REPORTING, continued In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 194 As of December 31, 2022 As of March 31, 2023 MCh$ MCh$ 894 1,100 Debt instruments at amortised cost 877 1,241 Debt instruments at fair value with changes in other comprehensive income 326 363 Loans and receivables 2,097 2,704 Total As of March 31 , 2023 , and December 31 , 2022 , the debt instrument portfolios include instruments of the Central Bank of Chile and/or the General Treasury of the Republic . Accordingly, their risk has been classified as low (no significant increase in risk) . The description of the main components of the IFRS 9 model used by the Bank is set out in Note 2 (r) . As of March 31 , 2023 , and December 31 , 2022 , the loans included in the portfolio of loans and receivables measured at fair value through other comprehensive income are assets of a high credit quality (normal portfolio) . Non - compliance The non - performing portfolio includes debtors and their loans for which recovery is considered remote, as they show an impaired or zero payment capacity, have been subject to forced restructuring or are overdue by 90 days or more in the payment of interest or principal, and are classified in the non - performing portfolio (C 1 to C 6 ) . As of December 31, 2022 As of March 31, 2023 Provisions Financial assets Provisions Financial assets Non - performing portfolio MCh$ MCh$ MCh$ MCh$ - - - - Interbank loans 406,919 1,067,492 409,340 1,090,091 Commercial loans 76,998 422,064 90,333 502,268 Mortgage loans 120,801 179,593 128,088 202,317 Consumer loans - 13,347 9,320 15,151 Contingent credit exposure 604,718 1,682,496 637,081 1,809,827 Total Under the IFRS 9 model, the Bank uses one of the default presumption factors when an asset is overdue by 90 days or more . Debt instruments and loan receivables measured at fair value through OCI are not non - performing . Individual/Group Group assessments are suitable for dealing with many transactions with low individual amounts and involving individuals or small companies . The Bank groups debtors with similar credit risk characteristics by associating each group with a certain probability of non - performing and a recovery rate based on a substantiated historical analysis . To this end, the Bank implemented the standard model for mortgage and commercial loans and the internal model for consumer loans . IFRS 9 aims to recognise expected credit loss over the asset's life, attending to significant increases in credit risk since the initial recognition . This may require a group assessment as the increase in credit risk may become more evident before the financial instrument is overdue, depending on the instrument's nature and available information . Always on the premise that information is available at no cost or effort . The grouping is based on similar risk characteristics .

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31 , 2023 , and 2022 , and as of December 31 , 2022 NOTE 47 - RISK MANAGEMENT AND REPORTING, continued Credit impairment The impaired portfolio consists of the non - performing loans (C 1 to C 6 ) plus B 3 and B 4 in the case of individual assessment . As of March 31 , 2023 , and December 31 , 2022 , the impaired portfolio amounts to MCh $ 1 , 993 , 935 and MCh $ 1 , 847 , 333 , respectively . IFRS 9 defines an asset as impaired when one or more events harm the estimated future cash flows, as evidenced by the issuer's financial difficulties, default or delinquency, bankruptcy or financial reorganisation, and disappearance from the active market . Debt instruments and loan receivables measured at fair value through other comprehensive income are not impaired . Charge - offs Charge - offs must be affected when the contractual rights to the cash flows expire . Charge - offs are translated into derecognitions in the Statement of Financial Position and include the unmatured portion in the case of instalment loans . Additional circumstances could lead to a loan charge - off, such as when the Bank concludes that it will not obtain any flows, or there is no enforceable title, when collection actions become time - barred or when the deadlines defined by the FMC are reached (see Note 2 letter q) . As of March 31 , 2023 , and December 31 , 2022 , loan write - offs amount to MCh $ 110 , 170 and MCh $ 337 , 851 , respectively . IFRS 9 states that a charge - off occurs when there is no reasonable expectation of recovering all or part of the contractual cash flows . A charge - off constitutes a derecognition . Debt instruments and loans receivables measured at fair value through other comprehensive income do not present impaired instruments/transactions . Reconciliation of provisions and loans The reconciliation between the opening and closing balance of provisions for the bank loans, commercial loans, mortgage loans, consumer loans and exposure for contingent loans is presented in Note 13 f, g, h, i and j . The reconciliation of the loan portfolios as of March 31 , 2023 , and December 31 , 2022 , is presented below : In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 195

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 47 - RISK MANAGEMENT AND REPORTING, continued In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 196 Total Non - performing Portfolio Substandard Portfolio Normal Portfolio Interbank loans MCh$ Evaluation Evaluation Group Individual Group Individual 32,991 - - - - 32,991 Balance as of January 1, 2023 34,376 - - - - 34,376 Change in measurement without portfolio reclassifying during the period: - - - - - - Change due to portfolio reclassification: - - - - - - New credits originated - - - - - - New credits due to translation from contingent to loan (33,101) - - - - (33,101) Paid from credits - - - - - - Provision application for charge - offs (1,393) - - - - (1,393) Exchange rate difference - - - - - Other changes in provisions 32,873 - - - - 32,873 Balance as of March 31, 2023 Total Non - performing Portfolio Substandard Portfolio Normal Portfolio Interbank loans MCh$ Evaluation Evaluation Group Individua l Group Individua l 428 - - - - 428 Balance as of January 1, 2022 71,886 - - - - 71,886 Change in measurement without portfolio reclassifying during the period: - - - - - - Change due to portfolio reclassification: - - - - - - New credits originated - - - - - - New credits due to translation from contingent to loan (40,515) - - - - (40,515) Paid from credits - - - - - Provision application for charge - offs 1,192 - - - - 1,192 Exchange rate difference - - - - - - Other changes in provisions 32,991 - - - - 32,991 As of December 31, 2022

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 47 - RISK MANAGEMENT AND REPORTING, continued In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 197 Total Deductibl e FOGAPEC ovid - 19 guarante es Subtotal Non - performing Portfolio Substandar d Portfolio Normal Portfolio Commercial loans MCh$ Evaluation Evaluation Group Individua l Group Individual 17,684,589 19,423 17,665,166 368,335 698,790 1,108,831 4,532,685 10,956,525 Balance as of January 1, 2023 270,667 93 270,574 11,920 3,113 4,221 82,663 168,657 Change in measurement without portfolio reclassifying during the period: 283,469 384 283,085 51,878 130,862 207,795 (68,089) (39,361) Change due to portfolio reclassification: 4,812,382 24 4,812,358 - - - 331,443 4,480,915 New credits originated 21,865 - 21,865 - - - 14,337 7,528 New credits due to translation from contingent to loan (5,279,323) (2,058) (5,277,265) (11,347) (120,297) (197,285) (458,567) (4,489,769) Paid from credits (41,497) - (41,497) (24,062) (14,424) - (3,011) - Provision application for charge - offs (237,415) - (237,415) (279) (9,241) (15,801) (3,533) (208,561) Exchange rate difference (6,939) (233) (6,706) (160) 4,269 - (104) (10,711) Other changes in provisions 17,507,798 17,633 17,490,165 396,285 693,072 1,107,761 4,427,824 10,865,223 Balance as of March 31, 2023 Total Deductibl e FOGAPEC ovid - 19 guarante es Subtotal Non - performing Portfolio Substandar d Portfolio Normal Portfolio Commercial loans MCh$ Evaluation Evaluation Group Individua l Group Individual 17,653,212 30,287 17,622,925 363,014 573,503 1,161,406 4,928,741 10,596,261 Balance as of January 1, 2022 1,143,882 71 1,143,811 37,092 18,905 21,224 478,607 587,983 Change in measurement without portfolio reclassifying during the period: 1,162,936 2,868 1,160,068 105,413 549,436 870,438 (111,233) (253,986) Change due to portfolio reclassification: 24,293,816 356 24,293,460 - - - 1,214,388 23,079,072 New credits originated 144,875 - 144,875 - - - 53,004 91,871 New credits due to translation from contingent to loan (26,271,485) (14,159) (26,257,326) (58,200) (504,836) (826,939) (1,935,748) (22,931,603) Paid from credits (136,627) - (136,627) (78,890) (51,137) (11) (6,587) (2) Provision application for charge - offs 83,353 - 83,353 118 (2,695) 94,208 100 (8,378) Exchange rate difference (389,373) - (389,373) (212) 115,614 (211,495) (88,587) (204,693) Other changes in provisions 17,684,589 19,423 17,665,166 368,335 698,790 1,108,831 4,532,685 10,956,525 Balance as of December 31, 2022

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 47 - RISK MANAGEMENT AND REPORTING, continued In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 198 Total Non - performing Portfolio Normal Portfolio Mortgage loans MCh$ Evaluation Evaluation Group Individua l Group Individual 15,729,009 422,064 - 15,306,945 - Balance as of January 1, 2023 93,782 15,138 - 78,644 - Change in measurement without portfolio reclassifying during the period : 69 86,319 - (86,250) - Change due to portfolio reclassification: 369,316 1,096 - 368,220 - New credits originated - - - New credits due to translation from contingent to loan (149,771) (10,691) - (139,080) - Paid from credits (12,528) (11,407) - (1,121) - Provision application for charge - offs - - - Exchange rate difference (8) (252) - 244 - Other changes in provisions 16,029,869 502,267 - 15,527,602 - Balance as of March 31, 2023 Total Non - performing Portfolio Normal Portfolio Mortgage loans MCh$ Evaluation Evaluation Group Individua l Group Individual 13,876,175 392,956 - 13,483,219 - Balance as of January 1, 2022 1,099,854 21,939 - 1,077,915 - Change in measurement without portfolio reclassifying during the period: (17,376) 33,319 - (50,695) - Change due to portfolio reclassification: 1,237,877 2,063 - 1,235,814 - New credits originated - - - New credits due to translation from contingent to loan (468,384) (29,411) - (438,973) - Paid from credits - - - Provision application for charge - offs - - - Exchange rate difference 863 1,198 - (335) - Other changes in provisions 15,729,009 422,064 - 15,306,945 - Balance as of December 31, 2022

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 47 - RISK MANAGEMENT AND REPORTING, continued In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 199 Total Non - performing Portfolio Normal Portfolio Consumer loans MCh$ Evaluation Evaluation Group Individua l Group Individual 5,282,812 179,591 - 5,103,221 - Balance as of January 1, 2022 664,088 33,600 - 630,488 - Change in measurement without portfolio reclassifying during the period: (21) 70,518 - (70,539) - Change due to portfolio reclassification: 650,402 11,459 - 638,943 - New credits originated 181,940 165 - 181,775 - New credits due to translation from contingent to loan (1,368,674) (31,127) - (1,337,547) - Paid from credits (66,672) (61,896) - (4,776) - Provision application for charge - offs (4,071) (1) - (4,070) - Exchange rate difference 794 8 - 786 - Other changes in provisions (if applicable) 5,340,597 202,317 - 5,138,280 - Balance as of December 31, 2022 Total Non - performing Portfolio Normal Portfolio Consumer loans MCh$ Evaluation Evaluation Group Individua l Group Individual 4,999,248 154,722 - 4,844,526 - Balance as of January 1, 2022 2,925,391 37,923 - 2,887,468 - Change in measurement without portfolio reclassifying during the period: (48,789) 203,624 - (252,413) - Change due to portfolio reclassification: 1,786,276 24,566 - 1,761,710 - New credits originated 780,616 453 - 780,163 - New credits due to translation from contingent to loan (4,984,251) (77,865) - (4,906,386) - Paid from credits (178,279) (163,848) - (14,431) - Provision application for charge - offs 1,412 3 - 1,409 - Exchange rate difference 1,188 13 - 1,175 - Other changes in provisions (if applicable) 5,282,812 179,591 - 5,103,221 - Balance as of December 31, 2022

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 47 - RISK MANAGEMENT AND REPORTING, continued In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 200 Total Non - performing Portfolio Substandar d Portfolio Normal Portfolio Contingent credit exposure MCh$ Evaluation Evaluation Group Individua l Group Individual 3,018,282 4,757 8,611 52,312 834,739 2,117,863 Balance as of January 1, 2023 50,747 127 116 337 29,360 20,807 Change in measurement without portfolio reclassifying during the period: 2,127 1,473 1,601 3,161 (195) (3,913) Change due to portfolio reclassification: 496,879 1,415 1,114 8,134 78,351 407,865 New credits originated (687,787) (1,918) (2,049) (11,212) 56,428 (729,036) New credits due to translation from contingent to loan 17,321 41 25 (1) 17,249 7 Paid from credits - - - - - - Provision application for charge - offs (231,619) (125) (57) (1,718) (173,606) (56,113) Exchange rate difference (204) 24 16 (9) (235) - Other changes in provisions (if applicable) 2,665,746 5,794 9,377 51,004 842,091 1,757,480 Balance as of March 31, 2023 Total Non - performing Portfolio Substandar d Portfolio Normal Portfolio Contingent credit exposure MCh$ Evaluation Evaluation Group Individua l Group Individual 4,993,946 5,793 4,782 47,343 2,706,987 2,229,041 Balance as of January 1, 2022 29,271 791 693 3,115 (148,587) 173,259 Change in measurement without portfolio reclassifying during the period: 5,247 3,512 5,139 20,949 (703) (23,650) Change due to portfolio reclassification: 2,403,393 3,861 4,535 26,630 284,727 2,083,640 New credits originated - - - - - - New credits due to translation from contingent to loan (4,544,503) (9,510) (8,057) (43,853) (2,103,411) (2,379,672) Paid from credits 89,402 264 150 4 89,415 (431) Provision application for charge - offs (587) 34 (2) 3 3,652 (4,274) Exchange rate difference 42,113 12 1,371 (1,879) 2,659 39,950 Other changes in provisions (if applicable) 3,018,282 4,757 8,611 52,312 834,739 2,117,863 Balance as of December 31, 2022 The normal portfolio comprises those debtors whose ability to pay enables them to meet their obligations and commitments, which is not expected to change . When a debtor is experiencing financial difficulties or a significant deterioration in its ability to pay, and there are reasonable doubts about the full recovery of principal and interest under the contractual terms, the customer is classified in the substandard portfolio . A client will be classified towards the non - performing portfolio if the possibility of recovering the credit is considered remote, as it shows an impaired or no ability to pay .

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31 , 2023 , and 2022 , and as of December 31 , 2022 NOTE 47 - RISK MANAGEMENT AND REPORTING, continued Reconciliation or movements of debt instruments and loans and receivables measured at fair value through other comprehensive income (OCI) are presented in Note 11 . Reconciliation or movements of debt instruments measured at amortised cost are presented in Note 13 b . Guarantees and credit enhancements In some cases, the maximum credit risk exposure is reduced by guarantees, credit enhancements and other actions that mitigate the Bank's exposure . On this basis, the constitution of guarantees is a necessary but insufficient instrument in the granting of a loan ; therefore, the acceptance of the risk by the Bank requires the verification of other variables or parameters, such as the capacity to pay or the generation of resources to mitigate the risk incurred . The securities management and valuation procedures are set out in the internal risk management policy . These policies set out the basic principles for credit risk management, including managing collateral received in customer transactions . In this respect, the risk management model includes assessing the existence of appropriate and sufficient guarantees to recover the loan when the debtor's circumstances do not allow it to meet its obligations . The procedures used for the valuation of collateral align with best market practice, involving appraisals on real estate collateral, the market price on stock market securities, the value of units in an investment fund, etc . In addition, all received guarantees must be properly instrumented, registered, and approved by the Bank's legal divisions . The Bank also has rating tools that enable it to rank the credit quality of transactions or customers . The Bank has historical databases that store internally generated information to study how this probability varies . Rating tools vary according to the analysed customer segment (commercial, consumer, SME, etc . ) . The maximum credit risk exposure by type of loan, the associated collateral and the net credit risk exposure as of March 31 , 2023 , and December 31 , 2022 , are presented below : In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 201 As of December 31, 2022 As of March 31, 2023 Allowance Net exposure Guarantee Maximum credit risk exposure Allowance Net exposure Guarantee Maximum credit risk exposure MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ 36 32,991 - 32,991 45 32,828 - 32,828 Interbank loans 641,340 7,881,716 9,945,505 17,827,221 632,272 7,711,085 9,796,713 17,507,798 Commercial loans 106,591 370,898 15,358,111 15,729,009 121,477 442,702 15,587,167 16,029,869 Mortgage loans 288,920 4,689,152 593,660 5,282,812 297,669 4,752,544 588,053 5,340,597 Consumer loans 37,969 2,572,056 476,327 3,048,383 38,971 2,332,837 362,972 2,695,809 Contingent credit exposure 1,074,856 15,546,813 26,373,603 41,920,146 1,090,434 15,271,996 26,334,905 41,606,901 Total Mortgage placements are, by their nature, covered by the properties that generated the loan, that is, the property that the customer has acquired, and which guarantees the transaction . When the Bank can receive or foreclose a property, it is accounted for as an 'Asset received or awarded in payment', and the loan and its provision are derecognised . The asset received is carried at the lower of book value and fair value (appraisal) minus costs to sell, under IFRS 5 , and categorised as held for sale . Impaired and non - impaired financial assets with associated guarantees, collateral or credit enhancements in favour of the Bank as of March 31 , 2023 , and December 31 , 2022 , are presented below :

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 47 - RISK MANAGEMENT AND REPORTING, continued In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 202 As of December 31, As of March 31, 2022 2023 MCh$ MCh$ Non - impaired financial assets 28,012,572 27,943,123 Properties/mortgages 4,441,058 7,358,200 Investments and others Impaired financial assets 2,009,968 2,081,133 Properties/mortgages 274,296 237,960 Investments and others 34,737,894 37,620,416 Total Financial derivative transactions are secured by collateral agreements deposited or transferred by one party in favour of the other, either in cash or financial instruments, and reduce the counterparty's credit risk . These guarantees are monitored periodically (usually daily) . Accordingly, the net balance per counterparty is determined based on agreed parameters, and a decision is taken concerning whether collateral is to be posted or collected . Credit limits of debtors related to the ownership or management of the bank According to Article 84 , No 2 of the General Banking Law (LGB) and the Updated Compilation of Banking Regulations (RAN) 12 - 4 , the total amount of credits granted to a group of related persons may not exceed 5 % of the bank's effective equity ; this limit increases to 25 % if what exceeds 5 % corresponds to credits secured by guarantees . In no case may the total of such credits granted by a bank exceed the amount of its effective equity . Furthermore, these credits may not be granted on more favourable terms of maturity, interest rates or guarantees than those granted to third parties in similar operations . A person's relationship with the Bank arises when they have a direct, indirect or third - party ownership interest in the Bank, participate in the management or are presumed to have such a relationship until there is sufficient evidence to rebut the presumption . A group of persons related to the Bank shall be understood to include all natural and legal persons who can exert significant and permanent influence on the decisions of the other ; there is a presumption that credits granted to one person will be used for the benefit of another, or there is a well - founded presumption that the persons maintain a relationship and form a unit of economic interest . Subsidiaries, business support companies and affiliated companies are companies related to a bank. Security over movable or immovable tangible property, or any other property that may legitimately be received as security, constitutes valid security. As of March 31, 2023, and December 31, 2022, the credit limit for debtors related to the ownership or management of the Bank under Article 84 No 2 of the General Banking Law and Chapter 12 - 4 of the Updated Compilation of Banking Regulations (RAN) are as follows: As of December 31, 2022 As of March 31, 2023 MCh$ % MCh$ % 473,133 7% 456,882 7% Global limitation to related groups of persons 6,759,047 6,526,885 Regulatory capital

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31 , 2023 , and 2022 , and as of December 31 , 2022 NOTE 47 - RISK MANAGEMENT AND REPORTING, continued MARKET RISK Market risk arises due to market activity through financial instruments whose value may be affected by changes in market conditions, reflected in changes in the various assets/liabilities and financial risk factors . Market risk management aims to manage and control market risk exposure within acceptable parameters . Four main risk factors affect market prices : interest rates, exchange rates, price, and inflation . Interest Rate Risk: the exposure to losses arising from adverse changes in market interest rates that affect the value of instruments, contracts and other transactions recorded on the balance sheet. Foreign exchange risk is the sensitivity to losses arising from adverse changes in the value of the exchange rates of foreign currencies, including gold, in which the instruments, contracts and other transactions recorded on the balance sheet are denominated. Inflation risk is the exposure to losses arising from adverse changes in the units or indices of readjustment defined in national currency. The instruments, contracts, and other transactions are denominated on the balance sheet. Price risk is generated by the volatility of rates or prices of assets or liabilities. Prepayment risk arises when, based on price movements, holders can alter the future cash flows of these assets or liabilities, leading to balance sheet mismatches that pose additional market risk management challenges. Market risk management The measurement and control of market risks are the responsibility of Market Risk Management, which is part of the Risk Division . The various committees in charge approve the limits, with responsibility mainly falling on the Market Committee and the Assets and Liabilities Committee . The Integrated Risk Committee also review the main market risks . The Finance Division manages the Bank's balance sheet, supervised and controlled by the Assets and Liabilities Committee and the Risk Division through the Financial Management Department . Its functions include the elaboration of detailed policies and their implementation, as well as : i. To optimise the cost of liabilities and seek the most efficient financing strategies, including issuing bonds and bank facilities. ii. Management of short and long - term regulatory liquidity limits. iii. Inflation risk management. iv. Management of interest rate risk in local and foreign currencies. Rate sensitivity is measured primarily using an analysis that quantifies the impact on earnings and the balance sheet of parallel movements in the real and nominal interest rate curve in Pesos and US dollars . The Bank's internal management for measuring market risk is mainly based on analysing the management of the following three components: trading portfolio local financial management portfolio foreign financial management portfolio Treasury manages the Bank's trading portfolios and ensures they remain within the loss limits determined, calculated and estimated by Market Risk Management . The trading portfolio (measured at fair value through profit or loss) consists mainly of those investments measured at fair value, free of any restriction on their immediate sale and which are often bought and sold by the Bank to sell them in the short term to benefit from short - term price movements . Financial management portfolios (measured at fair value through other comprehensive income) include all financial investments not considered in the trading portfolio . In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 203

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 47 - RISK MANAGEMENT AND REPORTING, continued The roles that concern the trading portfolio comprise the following: i. applying Value - at - Risk (VaR) techniques to measure interest rate risk, ii. adjusting trading portfolios to market and the measurement of daily profit and loss from trading activities, iii. comparing the actual VAR with the established limits, iv. establishing loss control procedures for losses above predetermined limits, and v. providing information on trading activities to the ALCO, other members of the Bank's management, and the Global Risk Department The functions regarding financial management portfolios entail the following: i. Applying sensitivity simulations (as explained below) to measure the interest rate risk of local currency activities and the potential loss predicted by these simulations, and ii. Providing the respective daily reports to the ALCO, other members of the Bank's Management, and the Global Risk Department. Market risk - Trading portfolio The Bank applies VaR methodologies to measure the trading portfolio's foreign currency risk and interest rate sensitivity . The Bank has a consolidated trading position comprising fixed - income investments and foreign currency trading . This portfolio comprises bonds issued by the Central Bank of Chile, mortgage bonds and low - risk locally issued corporate bonds . At the end of the year, the trading portfolio did not present investments in equity portfolios . Historical simulation methodology is used to estimate the Bank's VaR, which consists of observing the behaviour of the profits and losses that would have occurred with the current portfolio if market conditions in a given historical period had prevailed and using this information to infer the maximum loss with a given level of confidence . The methodology accurately reflects the historical distribution of market variables and does not require any specific probability distribution assumptions . All VaR measures are intended to determine the distribution function for the change in the value of a given portfolio . Once this distribution is known, the percentile is calculated related to the required confidence level, which will equal the value at risk under these parameters . As calculated by the Bank, the VaR estimates the maximum expected loss of the market value of a given portfolio over a 1 - day horizon with 99 . 00 % confidence . This is the maximum one - day loss the Bank could expect to incur on a given portfolio with a 99 . 00 % confidence level . In other words, it is the loss that the Bank would expect to surpass only 1 . 0 % of the time . The VaR provides a single estimate of market risk that is not comparable from one market risk to another . Returns are calculated using a time window of 2 years or at least 520 data points backwards in time from the VaR calculation reference date . The Bank does not calculate three separate VaRs . Instead, a single VaR is calculated for the entire trading portfolio, further segregated by risk type . First, the VaR programme performs a historical simulation and calculates a Profit and Loss (G&P) statement for 520 data points (days) for each risk factor (fixed income, foreign exchange and equities) . Then, the G&P of each risk factor is added together, and a consolidated VaR is calculated with 520 data points or days of data . Simultaneously, the VaR is calculated for each risk factor based on the individual G&P calculated . Moreover, a weighted VaR is calculated similarly as described above but gives a higher weighting to the most recent 30 data points . As a result, the higher of the two VaRs is reported . The Bank uses VaR estimates to warn if statistically estimated losses in the trading portfolio exceed prudent levels and, therefore, certain predetermined limits are in place . Limitations of the VaR model In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 204

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 47 - RISK MANAGEMENT AND REPORTING, continued In applying this methodology for calculation, no assumptions are made about the probability distribution of risk factors changes ; instead, the historically observed changes are used to generate scenarios for the risk factors under which each portfolio item will be valued . The definition of a valuation function fj (xi) for each instrument j is necessary, preferably the same as the one used to calculate the market value and daily position results . This valuation function shall be applied to generate simulated prices for all instruments in each scenario . Furthermore, the VaR methodology should be interpreted considering the following limitations: - Market rate and price changes may not be independent and identically distributed random variables, nor may they have a normal distribution . The normal distribution assumption, in particular, may underestimate the probability of extreme market movements . - The historical data used by the Bank may not provide the best estimate of the future joint distribution of changes in risk factors . Any modification of the data may be inappropriate . In particular, the use of historical data may fail to capture the risk of possible extreme and adverse market fluctuations regardless of the time frame used . - A 1 - day time horizon may not fully capture those market risk positions that cannot be liquidated or hedged within one day . It would not be possible to liquidate or hedge all positions in one day . - the VaR is calculated at the close of business, but trading positions may change substantially during the trading day. - The use of a 99 % confidence level does not consider or make any representation about losses that may occur beyond this confidence level, and - The VaR model does not capture all the complex effects of risk factors on the value of positions or portfolios and, therefore, may underestimate potential losses . During the period ended on March 31 , 2023 , and December 31 , 2022 , the Bank did not exceed the VaR limits of the trading portfolio’s three components : fixed - income, equity, and foreign currency investments . The Bank performs back - testing daily and generally finds that trading losses exceed the estimated VaR almost every 100 trading days . At the same time, a limit was set on the maximum VaR it is willing to accept on the trading portfolio . As of March 31 , 2023 , and December 31 , 2022 , the Bank has remained within its VaR threshold, even in instances where the actual VaR exceeded the estimated VaR . The high, low and average levels for each component and each year were as follows : In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 205 As of March 31, 2022 2023 US$ million US$ million VAR Consolidated: 7.52 7.29 High 2.66 3.47 Low 4.09 4.76 Average Fixed income investments: 6.59 7.03 High 2.68 3.54 Low 3.94 4.64 Average Variable income investments: 0.21 - High 0.03 - Low 0.09 - Average Foreign currency investments 2.64 3.23 High 0.24 0.28 Low 0.78 0.82 Average

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31 , 2023 , and 2022 , and as of December 31 , 2022 NOTE 47 - RISK MANAGEMENT AND REPORTING, continued Market risk – Local and foreign financial management The Bank's financial management portfolio includes most of the Bank's assets and non - trading liabilities, including the credit/loan portfolio . The Bank's commercial strategies (structural risk) heavily influence these portfolios' investment and funding decisions . The Bank uses sensitivity analysis to measure the market risk of local and foreign currency (not included in the trading portfolio) . The Bank conducts a scenario simulation which is calculated as the difference between the present value of the flows in the chosen scenario (curve with a parallel movement of 100 bps in all segments) and their value in the baseline scenario (current market) . All items in local currency indexed to inflation (UF) are adjusted by a sensitivity factor of 0 . 57 , representing a yield curve shift by 57 basis points in real rates and 100 basis points in nominal rates . The same scenario is conducted for net foreign currency positions and interest rates in US dollars . The Bank has also set limits on the maximum loss these interest rate movements can have on budgeted capital and net interest income for the year . In order to determine the consolidated limit, the foreign currency limit is added to the local currency limit for both the net financial loss limit and the capital loss and reserves limit using the following formula : Bounded limit = square root of a 2 + b 2 + 2 ab, in which : a: limit in national currency. b: limit in foreign currency. Since it is assumed that the correlation is 0. 2ab = 0. Limitations of sensitivity models The most important assumption is using a change of 100 basis points in the yield curve ( 57 basis points for real rates) . The Bank uses a change of 100 basis points as sudden changes of this magnitude are considered realistic . In addition, the Global Risk Department has also established comparable country limits to compare, monitor and consolidate market risk by country in a realistic and orderly manner . Furthermore, the methodology of sensitivity simulations should be interpreted considering the following limitations : - The scenario simulation assumes that the volumes remain on the Bank's Interim Consolidated Statements of Financial Position and are always rolled over at maturity, omitting the fact that certain credit risk considerations and prepayments may affect the maturity of certain items . - This model assumes an equal change across the entire yield curve of everything and does not consider different movements for different maturities. - The model does not consider the sensitivity of volumes resulting from changes in interest rates . Limits on budgeted finance income losses are calculated based on expected finance income for the year that cannot be obtained, which means that the actual percentage of finance income at risk could be higher than expected . In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 206

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 47 - RISK MANAGEMENT AND REPORTING, continued Market Risk - Financial Management Portfolio as of March 31, 2023, and December 31, 2022: In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 207 As of December 31, 2022 As of March 31, 2023 Effect on capital Effect on financial income Effect on capital Effect on financial income Financial management portfolio - local currency (in MCh$) 95,710 33,550 353,718 124,904 Loss limit 57,176 23,982 173,389 65,041 High 39,957 15,459 42,870 15,459 Low 49,580 21,366 77,983 30,920 Average Financial management portfolio - foreign currency (in US$ million) 43,329 38,231 158,870 142,983 Loss limit 33,388 9,713 91,935 9,983 High 20,371 255 20,371 255 Low 26,310 3,173 39,898 3,920 Average Financial management portfolio - consolidated (in MCh$) 95,710 33,550 353,718 124,904 Loss limit 76,738 28,699 280,003 70,997 High 66,098 16,515 67,702 16,516 Low 71,003 23,438 122,200 33,503 Average Inflation risk The Bank's assets and liabilities are indexed according to the Unidad de Fomento (UF) variation . The Bank has, in general, more assets than liabilities in UF . Therefore, moderate rises in inflation have a positive effect on repricing income, while a fall in the UF value negatively impacts the Bank's margin . To manage this risk, the Assets and Liabilities Committee limits the difference between UF - denominated assets and liabilities, which may not exceed 30 % of the Bank's interest - earning assets . Financial Management manages this mismatch on a day - to - day basis, and the limits are calculated and monitored by the Market Risk Division . Market Risk items and their measurement Market Risk Exposure is measured and monitored using the difference between the foreign currency asset and liability balances (net position) and the cash flows payable (associated with liability items) and cash flows receivable (associated with asset items) in the Trading and Banking Books for a given period . Foreign currency items and term mismatches are exposed to different adjustment factors, sensitivities and rate changes . The Board of Directors of Banco Santander presented and approved the Market Risk Exposure Policy on a Standardised Basis . The following risks will determine Market Risk Exposure : Interest Rate Risk Currency Risk Readjustment Risk Currency Options Risk The following illustrates the market risk exposure according to the FMC and the Central Bank of Chile guidelines . The maximum exposure to long - term interest rate risk is 35 % of regulatory capital and is approved by the Board of Directors . The maximum exposure to short - term interest rate risk is 30 % of net interest and repricing income plus interest rate sensitive fees :

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 47 - RISK MANAGEMENT AND REPORTING, continued In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 208 As of December 31, 2022 As of March 31, 2023 MCh$ MCh$ Trading portfolio market risk 441,688 420,714 Rate Risk Exposure 1,535 13,829 Currency Risk Exposure - - Interest Rate Options Risk 1,145 1,028 Risk Currency Options 444,368 435,571 Total exposure of the trading portfolio 555,460 544,465 10% of the RWAs 999,828 980,036 Subtotal 6,759,047 6,526,885 Limit = Regulatory capital 5,759,219 5,546,849 Available margin Short - term market risk of financial management portfolio 193,895 158,117 Short - term Exposure to Interest Rate Risk 112,523 142,533 Exposure to Readjustment Risk 306,418 300,650 Short - term exposure to financial management portfolio 530,199 480,960 Limit = 35% net (net interest and adjustment income + interest rate - sensitive fees) 223,781 180,310 Available margin Long - term market risk of financial management portfolio 1,194,181 1,039,526 Long - term exposure to interest rate risk 2,365,666 2,284,410 Limit = 35% of Effective Equity 1,171,485 1,244,884 Available margin IBOR Reform In December 2020 , the ICE Benchmark Administration Limited (IBA) launched a consultation on its intention to cease publication of non - USD LIBOR and USD LIBOR 1 W and 2 M tenors until December 31 , 2021 , and of all other USD LIBOR tenors after publication on June 30 , 2023 . The Bank has been working since 2019 on the transition to risk - free reference rates (hereafter also "RFR"), including the SOFR . In this context, the Bank's work plan includes the identification of the impacted customers, the impacted areas, the various risks to which the Bank is exposed, the determination of working teams for each risk, the involvement of senior management in a robust project governance plan and an action plan for each of the identified impacted/risk areas, which will enable us to meet the challenges imposed by the changes in benchmark rates . As of March 31 , 2023 , and December 31 , 2022 , the financial asset and liability exposures impacted by the IBOR reform are presented below : Financial derivatives contracts (Liabilities) Financial derivatives contracts (Assets) Financial instruments Deposits Credits and receivables from clients MCh$ MCh$ MCh$ MCh$ MCh$ 1,050,598 1,132,737 33,327 - 110,296 31.03.2023 1,712,642 1,818,517 36,730 - 515,277 31.12.2022 The Bank has been working on the basis of its IBOR transition programme, focusing mainly on: i) Identifying the risks associated with the transition and defining mitigation actions, ii) Developing products benchmarked to the proposed replacement rates, iii) Developing transition capacity through the renegotiation of existing USD LIBOR benchmarked contracts. In this regard, efforts in the latter half of 2021 and the first half of 2022 focused on preparing to offer RFR index - linked products. In the second half of 2022 and during 2023 until the cessation of the index, work will focus on the renegotiation and migration of existing USD LIBOR contracts to transition to RFR (SOFR) indices:

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31 , 2023 , and 2022 , and as of December 31 , 2022 NOTE 47 - RISK MANAGEMENT AND REPORTING, continued From September 2022 to March 2023, the renegotiation of USD LIBOR - linked contracts with a maturity beyond June 2023 will occur. During the last quarter of 2022 until June 30, 2023, USD LIBOR - referenced transactions with a maturity later than June 2023 will be migrated. As of March 31 , 2023 , the financial asset and liability items impacted by the IBOR reform are loans and receivables from customers, deposits, financial instruments and derivative contracts . To fulfil its functions, the Integrated Risk Committee works directly with the Bank's risk and control departments, whose joint objectives include : To assess those risks which, due to their size, could compromise the Bank's solvency or which present potentially significant operational or reputational risks; to ensure that the Bank has the means, systems, structures and resources following the best practices to implement the risk management strategy. to ensure the integration, control and management of all the Bank's risks. to implement consistent risk principles, policies and metrics across the Bank and its businesses. to develop and implement a risk management model in the Bank so that risk exposure is properly integrated into the different decision - making processes. to identify risk concentrations and mitigation alternatives, monitor the macroeconomic and competitive environment and quantify sensitivities and the foreseeable impact of different scenarios on risk positioning; and to manage the Bank's structural liquidity, interest rate and exchange rate risks, as well as the Bank's own funds base. In order to achieve the objectives mentioned above, the Bank (Management and Asset - Liability Committee) performs several activities related to risk management, which include : to calculate the risk exposures of the different portfolios and/or investments, considering mitigating factors (guarantees, netting, collateral, etc . ) ; to calculate the expected loss probabilities of each portfolio and/or investments ; to assign loss factors to new operations (rating and scoring) ; to measure the risk values of portfolios and/or investments against different scenarios through historical simulations ; to set limits to potential losses based on the different risks incurred ; to determine the potential impact of structural risks on the Bank's Interim Consolidated Income Statements ; to set limits and alerts to ensure the Bank's liquidity ; and to identify and quantify operational risks by business lines and thus facilitate their mitigation through corrective actions . The Integrated Risk Committee is primarily responsible for monitoring compliance with the Bank's risk management policies and procedures and reviewing the adequacy of the risk management framework concerning the risks faced by the Bank . Benchmark interest rate reform - phase 2 In 2013 , IOSCO published the Principles for Financial Benchmarks (IOSCO Principles), setting standards for developing benchmarks . Subsequently, the FSB formed the Official Sector Steering Group (OSSG) to apply the IOSCO Principles to IBOR (Interbank Offered Rates) indices . Since then, central banks and regulators in several jurisdictions have organised working groups to recommend alternative indices to indices such as EONIA (Euro Overnight Index Average) and LIBOR (London Interbank Offered Rates) . As of September 13 , 2018 , the European Central Bank's working group recommended that the euro short - term interest rate (€STR) should replace the EONIA . Accordingly, as of October 2 , 2019 , when the €STR became available, the EONIA changed its methodology to be calculated as the €STR plus a spread of 8 . 5 basis points . This change in the EONIA methodology was intended to facilitate the transition of the EONIA market to €STR before its final cessation on January 3 , 2022 . On March 5 , 2021 , the Financial Conduct Authority (FCA) announced the final dates for the cessation of LIBOR : In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 209

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31 , 2023 , and 2022 , and as of December 31 , 2022 NOTE 47 - RISK MANAGEMENT AND REPORTING, continued On December 31 , 2021 , the publication of USD LIBOR (one - week and two - month maturities), CHF LIBOR (all maturities), GBP LIBOR (overnight, one - week, two - month and 12 - month maturities), JPY LIBOR (overnight, one - week, two - month and 12 - month maturities) and EUR LIBOR (all maturities) ceased . On December 31 , 2021 , the calculation methodology for some LIBORs was amended to publish temporary synthetic LIBORs, which became non - representative : GBP LIBOR ( 1 - month, 3 - month and 6 - month maturity) and JPY LIBOR ( 1 - month, 3 - month and 6 - month maturity) . On June 30 , 2023 , the publication of USD LIBOR (overnight, 1 month, 3 months, 6 months and 12 months) will cease . In October 2020 , the International Swaps and Derivatives Association (ISDA) launched the protocol and supplement of substitute indices (from now on, fallbacks) for IBORs (which came into force on January 25 , 2021 ) . It provided derivatives market participants with new fallbacks of LIBORs (among other IBORs, such as EURIBOR) for existing and new derivative contracts . Furthermore, on August 19 , 2021 , ISDA launched a new protocol allowing institutions to incorporate a fallback to the EONIA as the applicable collateral rate in ISDA collateral arrangements (CSAs) . To control the risks and address the different challenges generated by the transition, in 2019 , the Corporate Department launched a global Santander programme . This IBOR transition programme enabled us to ensure that the risks linked to the process were identified and managed consistently and appropriate measures were taken to mitigate them . The programme structure focuses on the following areas : Technology and Operations, Legal, Customer Relationship, Risk Management and Modelling, Conduct and Communication, and Accounting and Finance . In 2021 , the programme focused on making all contractual, commercial, operational and technological changes necessary to address the transition from LIBOR and EONIA rates that were discontinued in 2021 . LIQUIDITY RISK This refers to the possibility that an entity may not be able to meet its payment commitments or may have to resort to raising funds on burdensome terms or on terms that could damage its image and reputation . Liquidity risk management The Bank's approach to liquidity management is to ensure, to the extent possible, that it always has sufficient resources to meet its obligations as they fall due under normal circumstances and stress conditions without incurring unacceptable losses or risking damage to the Bank's reputation . Accordingly, the Board sets limits on a minimum portion of maturing funds available to meet such payments and on a minimum level of interbank operations and other lending facilities that should be available to cover drawings at unexpected levels of demand, which is reviewed periodically by the Asset and Liability Committee (ALCO) whose functions include monitoring the necessary liquidity risk management strategies . This committee comprises 3 directors, 7 Bank management committee members, and 3 divisions (Financial Management, Treasury and Market Risk) . The setting of limits is conceived as a dynamic process that responds to the level of risk appetite deemed acceptable by the Bank and its entities . The system of limits is sufficiently robust to allow the level of exposure each institution incurs to liquidity risks to be known at all times . Besides the limits, the Bank includes alert indicators by the concentration of counterparties, type of products, and maturities in its management to diversify the sources of funding and their maturity structure . The Bank monitors its liquidity position daily, determining the future flows of its inflows and outflows . Furthermore, stress tests are performed at the end of each month, using a variety of scenarios covering both normal market conditions and market fluctuation (stress) conditions . In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 210

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31 , 2023 , and 2022 , and as of December 31 , 2022 NOTE 47 - RISK MANAGEMENT AND REPORTING, continued The Bank has a structure of internal liquidity limits that Financial Management and the Treasury must respect . Market Risk Management calculates and monitors the consumption of internal limits, verifies compliance with them and communicates their status to senior management and the Board of Directors . At the beginning of each calendar year, these limits are proposed by Market Risk Management, approved locally at the ALCO and then ratified at the highest level . Liquidity limits and early warning indicators, and internally defined management measures can be differentiated into the following three groups : Limits associated with concentration and mismatches of cash flows and liquidity of the Bank's operations . Liquidity Management Tools, called Structural Liquidity or Funding Table, are used to determine the Bank's structural liquidity position and enable its active management as an essential mechanism to ensure its assets' funding under optimal conditions permanently . Early warning indicators are linked with concentration risks and as tools for detecting and anticipating potential liquidity stress situations and, if necessary, activating the Liquidity Contingency Plan . Market Risk Management establishes and updates the Liquidity Management Policy (LMP) contents, with reviews and possible updates conducted once a year . Nevertheless, it may be updated at the request of any areas affected by the LMP that have identified the need for modification . The Board approves the contents of the LMP of Directors . Market Risk Management additionally provides all the necessary tools for the statistical analysis required by local liquidity regulations . It also assesses whether the models used are valid at least once a year . The Board of Directors must approve the conclusions of this analysis . In periods of normal liquidity, Financial Management applies policies and makes arrangements to keep the Bank within internal and regulatory limits . If a crisis has been identified, even at its mildest level, the Liquidity Crisis Committee applies the necessary policies to deal with potential liquidity shortfalls or restrictions, creates contingency plans to manage emergencies quickly, and reports such situations to senior management and the respective committees . Liquidity risk measurement and control 1. Time - limit mismatches subject to regulatory limits The Regulatory Liquidity Ratio measures and limits the mismatches of net income flows relative to capital . Under current regulations, the 30 - day mismatch cannot exceed one time the Bank's core capital for both domestic and foreign currency, and the 90 - day mismatch cannot exceed two times . 2. Monitoring indicators and liquidity ratios subject to regulatory limits A vital component of liquidity risk management is High - Quality Liquid Assets (HQLA) . These are balance sheet assets, mainly consisting of financial investments that are not pledged as collateral, have low credit risk, and have a deep secondary market . According to Basel III standards, these assets are divided into three tiers, with Tier 1 assets being the most liquid and Tier 3 the least liquid . Level 1 assets are mostly composed of bonds from the Republic of Chile, the Central Bank of Chile, and the United States Treasury Department . In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 211

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 47 - RISK MANAGEMENT AND REPORTING, continued As of December 31, As of March 31, 2022 2023 HQLA MCh$ MCh$ 1,453,265 1,324,885 Tier 1: available 5,424,452 5,412,957 Tier 1: fixed income 8,066 7,725 Tier 2: fixed income 6,885,783 6,745,567 Total 3. Liquidity Coverage Ratio (LCR) The Liquidity Coverage Ratio (LCR) measures liquid assets over 30 - day net cash outflows . It is used by banks globally as part of the Basel III standards . Since 2019 , Chilean banks have been required to have a minimum level of 60 % , which will gradually increase to 100 % from 2022 . A minimum level of 80 % was required for the financial year of 2023 . The objective of the LCR is to promote the short - term resilience of banks' liquidity risk profiles . To this end, the LCR ensures that these organisations have an adequate pool of unencumbered High - Quality Liquid Assets, which can be easily and immediately converted into cash in the private markets to cover short - term liquidity needs . As of December 31, 2022 As of March 31, 2023 Liquidity coverage ratio % % 175 182 LCR In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 212 Banco Santander - Chile's LCR indicator was well above the minimum required for 2021 and already above the 100 % required for 2022 . This reflects the conservative liquidity policies imposed by the Board of Directors through the Assets and Liabilities Committee . 4. Net Stable Funding Ratio (NSFR) This indicator is required by Basel III and provides a sustainable maturity structure of assets and liabilities so that banks maintain a stable funding profile concerning their activities . The Central Bank and the FMC defined a minimum NSFR level of 60 % by 2022 , rising to 100 % by 2026 . As of December 31, 2022 As of March 31, 2023 Net stable funding ratio % % 116 113 NSFR 5. Information on liquidity position per the requirements of the Central Bank of Chile i. Maturity mismatches The Central Bank of Chile published on March 8 , 2022 , Rules on the Management and Measurement of the Liquidity Position of Banking Companies which modernises liquidity regulation, aligning the published regulatory requirements of the FMC in line with the Basel III standards . According to the Central Bank, the liquidity position is measured and monitored through the difference between cash flows payable, which are associated with liability and expense account items, and cash flows receivable, which concern asset and income account items, for a given period or time frame, referred to as the maturity mismatch .

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 47 - RISK MANAGEMENT AND REPORTING, continued The liquidity policy on an Adjusted Basis was presented and approved by the Board of Directors of Banco Santander - Chile. Maturity mismatch calculations are performed separately for domestic and foreign currencies. Maturity mismatches shall be made in the following time frames: First time frame: up to 7 days inclusive Second time frame: between 8 days and 15 days inclusive Third time frame: between 16 and 30 days inclusive Fourth time frame: between 31 days and 90 days inclusive In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 213 As of March 31, 2023 Consolidated Individual Up to 30 days Up to 15 days Up to 7 days Up to 30 days Up to 15 days Up to 7 days MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ 4,695,292 2,002,068 6,805,743 4,729,242 1,999,419 7,954,595 Cash flow to be received (assets) and income 2,716,005 2,454,245 10,328,522 2,711,059 2,454,245 10,377.200 Cash flow payable (liabilities) and expenses 1,979,287 (452,177) (3,522,779) 2,018,183 (454,826) (2,422,605) Mismatch (1,995,669) (859,248) Mismatch subject to limits Limits: 4,034,291 3,920,676 1 times the capital 2,038,622 3,061,428 Available margin 49% 22% % Used As of December 31, 2022 Consolidated Individual Up to 30 days Up to 15 days Up to 7 days Up to 30 days Up to 15 days Up to 7 days MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ 3,514,336 1,804,580 9,269,188 3,552,792 1,805,516 9,123,887 Cash flow to be received (assets) and income 2,707,135 1,855,664 9,320,125 2,702,150 1,855,664 9,295,580 Cash flow payable (liabilities) and expenses 807,201 (51,084) (50,937) 850,642 (50,148) (171,693) Mismatch 705,180 628,801 Mismatch subject to limits Limits: 4,238,372 4,128,808 1 times the capital 4,943,552 4,757,609 Available margin 17% 15% % Used ii. Composition of funding sources The main sources of third - party funding are as follows: As of December 31, As of March 31, 2022 2023 Main sources of funding MCh$ MCh$ 14,086,226 13,806,513 Deposits and other demand liabilities 12,978,790 14,265,830 Time deposits and other term equivalents 8,864,765 8,795,417 Interbank borrowing 9,490,009 9,705,280 Debt and regulatory capital instruments issued 45,419,790 46,573,040 Total

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 47 - RISK MANAGEMENT AND REPORTING, continued The Central Bank has statutory powers allowing it to demand banks to hold reserves of up to 40 % on average for demand deposits and up to 20 % for time deposits to implement monetary measures . Furthermore, as the aggregate amount of demand deposits exceeds 2 . 5 times the bank's regulatory capital, the bank must maintain a 100 % 'technical reserve' against them in bonds and Central Bank's notes . As of March 31 , 2023 , and December 31 , 2022 , the Central Bank required Santander to maintain a technical reserve of MCh $ 0 for both periods . The volume and composition of liquid assets are presented in item 2 above . The liquidity coverage ratio is presented in item 3 above . 6. Maturity analysis of financial liabilities The remaining contractual maturities of financial liabilities are provided in Note 45. OPERATIONAL RISK Operational risk is defined as the risk of loss due to defects or failures of internal processes, employees and systems or external events . It covers risk categories such as operational incidents, cloud computing, cyber security, business continuity, and strategic and non - strategic outsourcing . Operational risk is generated in all business and support areas and is inherent in all products, activities, processes and systems . For this reason, all employees are responsible for managing and controlling the operational risks generated by their activities . Our operational risk control and management model is based on a continuous process to identify, assess and mitigate risk sources, whether or not they have materialised, ensuring that risk management priorities are properly established . Operational risk management The operational risk model regulates the necessary elements for adequate management and control of operational risk, aligned with compliance with advanced regulatory standards and best management practices, and includes the following phases : strategy and planning. identification, assessment and monitoring of risks and internal controls. implementation and monitoring of mitigation measures. availability of information, adequate reporting and escalation of relevant issues. The main operational risk tools used are: - Internal events database. Recording operational risk events with financial impact (all losses are recorded, regardless of their amount) or non - financial impact (such as the regulatory impact on customers and/or services). This information: - allows root - cause analysis. - raises awareness of the risks. - enables the escalation of relevant operational risk events to the senior management of the Risk division with maximum immediacy. - facilitates regulatory reporting. - Self - assessment of operational risks and controls . A qualitative process that assesses the main operational risks related to each function, the state of the control environment and their assignment to the different functions within the Bank, using the judgement and experience of a panel of experts from each function . The objective is to identify and assess material operational risks that could prevent business or support units from achieving their objectives . Once the risks and the internal controls that mitigate them have been assessed, mitigating measures are identified if risk levels are above the tolerable level . In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 214

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31 , 2023 , and 2022 , and as of December 31 , 2022 NOTE 47 - RISK MANAGEMENT AND REPORTING, continued This process integrates specific operational risk reviews that allow for a cross - cutting identification of risks, especially technological risks, fraud, supplier risks and factors that could lead to other operational risks and specific regulatory non - compliance . - External events database . Quantitative and qualitative information of external operational risk events . The database allows for a detailed and structured analysis of relevant events in the sector, comparing the loss profile and the proper preparation of self - assessment exercises and scenario analysis . - Analysis of operational risk scenarios . Its objective is to identify events with an extremely low probability of occurrence that could generate significant losses for the Bank and establish appropriate mitigation measures through the assessment and expert opinion of the business lines and risk managers . - A statement establishing the Bank's commitment to control and limit non - financial risk events that lead to or could lead to financial losses ; fraud events ; operational and technological incidents ; legal and regulatory breaches ; conduct issues, or reputational damage . Although a certain volume of losses is expected, unexpected high - severity losses due to a failure of controls are not acceptable . - Internal audit, external audit and regulators' recommendations . They provide relevant independent information on inherent and residual risk and identify areas for improvement in controls and processes . - Capital model : a model that captures the Bank's risk profile, based primarily on information gathered from the internal loss database, external data and scenarios . The main application of the model is to determine the economic capital for operational risk and the estimation of expected and stressed losses, which are used in the operational risk appetite . - Other specific tools to further analyse and manage operational risks include assessing new products and services, managing business continuity plans, and updating the operational risk programme's perimeter and quality review processes . The Bank's operational risk management and reporting system support programmes and tools focusing on governance, risk and compliance . It provides information for management and reporting and helps improve decision - making in operational risk management by consolidating information, simplifying the process, and avoiding duplication . Operational continuity plan Digital transformation is revolutionising the way banks operate, presenting new business opportunities while also giving rise to a wide range of emerging risks, such as technology risks, cyber risks and an increasing reliance on suppliers, which increases exposure to events that may affect the delivery of services to our customers . The Bank is highly committed to ensuring robust control of the environment as determined by the best industry standards . The aim is to strengthen our operational resilience to potentially disruptive events, thereby ensuring adequate service delivery to our customers and system stability . One of the main pillars to achieve this is a management system of business continuity aimed at ensuring the perpetuity of business processes in the event of a disaster or major incident . This system identifies the potential impacts that threaten the entity, supplying the correct protocols and governance to ensure an effective response - ability . Its main objectives are : To protect the integrity of people in a contingency situation. To ensure that core functions are performed, and the impact on service delivery to our customers is minimised in contingency events. To meet the Bank's obligations to its employees, customers, shareholders and other stakeholders. To comply with regulatory obligations and requirements. In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 215

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31 , 2023 , and 2022 , and as of December 31 , 2022 NOTE 47 - RISK MANAGEMENT AND REPORTING, continued To minimise the entity's potential financial losses and impact on the business. To protect the brand image, credibility and trust in the entity. To reduce operational effects by providing effective procedures, priorities, and strategies for recovering and restoring business operations following a contingency. To contribute to stabilising the financial system. The pandemic challenged the business continuity planning frameworks and strategies . While some protocols had to be adapted, this crisis demonstrated that the Bank has a robust Business Continuity Management system . Relevant mitigation measures The Bank implements and monitors mitigation measures related to the main sources of risk through internal operation risk management tools and other external sources of information . Business transformation and digitalisation bring new risks and threats, such as increased payment fraud and origination (credit) fraud . We have improved control mechanisms and designed new products to mitigate these risks . Strong authentication processes in the customer enrolment process and the reinforcement of anti - fraud alerts in origination are increasingly widespread resources to mitigate the risk of fraud . In the case of cards, the use of chip and PIN cards in shops and ATMs, two - step authentication with one - time passwords (dynamic verification passwords), reinforced security at ATMs through the incorporation of physical protection and anti - skimming elements, as well as improvements in the logical security of the devices have become widespread . In the case of internet banking, verification of online banking transactions with a second security factor of one - time passwords, implementation of specific protection measures for mobile banking, such as identification and registration of customer devices, monitoring of the security of the e - banking platform to prevent attacks on the systems, among others . Cybersecurity Cybersecurity threats are expected to increase . The financial sector is expected to be one of the main targets . With the increased reliance on digital systems, cybersecurity is one of the main non - financial business risks . Therefore, our goal is to make the Bank a cyber - resilient organisation that can quickly resist, detect, and respond to cyber - attacks by constantly evolving and improving its defences . In this area, the Bank continues to develop its control and monitoring framework in line with the best international practices . Outsourcing of services Consistent with our digitalisation strategy, the Bank aspires to present its customers with the best solutions and products on the market . This implies increasing services provided by third parties and the intensive use of new technologies such as cloud services . In addition, due to increasing cyber risks and regulatory requirements, we have updated and strengthened the supplier management framework, internal control framework and risk culture to ensure that risks associated with third - party procurement are accurately assessed and managed . The Bank has identified the suppliers that could present a higher level of exposure for our operations and the services provided to our customers. Accordingly, it has reinforced the monitoring of these suppliers to ensure that: They have an appropriate control environment, depending on the level of risk of their service. Business continuity plans are in place to ensure service delivery in case of disruptive events. They have controls to protect sensitive information processed during service provision. Contracts and agreements with third parties include the necessary clauses to protect the interests of the Bank and our customers while at the same time covering existing legal obligations. In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 216

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31 , 2023 , and 2022 , and as of December 31 , 2022 NOTE 47 - RISK MANAGEMENT AND REPORTING, continued There are exit strategies, including service reversion or migration plans, in the case of services with a strong impact on business continuity and high replacement complexity. Insurance To address operational risk and other risk types generated by the Bank's own operations, insurance has been procured for property damage, general civil liability, fraud, expenses arising from cybersecurity breaches, and third - party claims against executives, among others . Exposure to net loss, gross loss and gross loss recovery per operational risk event In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 217 As of December 31, 2022 As of March 31, 2023 MCh$ MCh$ Gross loss and expenses for operational risk events in the period 91 35 Internal fraud 8,513 2,163 External fraud 8,095 2,175 Labour practices and business security 789 130 Customers, products and business practices 221 49 Damage to physical assets 981 96 Business interruption and system failures 3,624 2,317 Execution, delivery and process management 22,314 6,966 Subtotal Expense recoveries for operational risk events in the period - - Internal fraud 2,194 (210) External fraud 1,391 (593) Labour practices and business security 673 (102) Customers, products and business practices - (12) Damage to physical assets 2 (17) Business interruption and system failures 809 (33) Execution, delivery and process management 5,069 (968) Subtotal 17,245 7,934 Net loss from operational risk events

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 48 - INFORMATION ON REGULATORY CAPITAL AND CAPITAL ADEQUACY INDICATORS The Bank defines capital risk as that which the Bank or any of its companies will incur in insufficient quantity and/or quality of capital necessary to : meet the minimum regulatory requirements to operate as a bank ; meet market expectations regarding its creditworthiness ; and support the growth of its business and any strategic opportunities that may arise, under its strategic plan . The objectives in this respect include in particular: • To meet internal capital and capital adequacy targets. • To comply with regulatory requirements. • To align the Bank's strategic plan with the capital expectations of external stakeholders (rating agencies, shareholders and investors, customers, supervisors, etc.). • To support business growth and any strategic opportunities that may arise. The Bank has a capital adequacy position that exceeds regulatory requirements. Capital management optimises value creation in the Bank and its business segments . The Bank continuously assesses its risk - return ratios through its core capital, effective net worth, economic capital and return on equity . Regarding capital adequacy, the Bank conducts its internal process based on the standards of the FMC, which are in force as of December 1 , 2021 (Basel III) . Economic capital is the capital required to bear the full risk of doing business at a given level of solvency . Capital is managed according to the risk environment, Chile's economic performance and the economic cycle. The respective Committee may amend our existing capital policies to address changes in the above - risk environment. Capital risk management The Bank has an Executive Capital Committee responsible for overseeing, authorising and assessing all aspects of capital and solvency . The Board of Directors has deferred to the ALCO the knowledge and assessment of the capital levels and returns in line with the Bank's strategy . In addition, the Integrated Risk Committee monitors and is responsible for the limits of primary and secondary metrics based on risk appetite . Capital management is based on a Capital Framework designed to ensure that the capital, structure and composition level are appropriate at any point in time considering the Bank's risk profile and under different scenarios . It warrants the adherence to the minimum regulatory requirements, the risk appetite and the Recovery Plan, and that these frameworks align with the interests of all stakeholders while supporting the growth strategy determined by the Bank . The capital model defines the functional and governance aspects of capital planning, budget execution and monitoring, capital adequacy analysis, capital measurement, and capital reporting and disclosure . In addition, this model covers the main capital management activities : 1. Establish the Bank's solvency and capital contribution targets aligned with minimum regulatory requirements and internal policies to ensure a strong level of capital, consistent with the Bank's risk profile and efficient use of capital to maximise shareholder value . 2. Development of a capital plan to meet these objectives consistent with the strategic plan. 3. Capital adequacy assessment to ensure that the capital plan is consistent with the Bank's risk profile and risk appetite (also stress scenarios) . In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 218

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31 , 2023 , and 2022 , and as of December 31 , 2022 NOTE 48 - INFORMATION ON REGULATORY CAPITAL AND CAPITAL ADEQUACY INDICATORS, continued 4. Capital budget development as part of the Bank's budget process. 5. Monitoring and controlling budget execution and developing action plans to correct any deviations from the budget. 6. Calculation of capital metrics. 7. Internal capital reporting and reporting to supervisory authorities and the market. The Bank has also developed the necessary policies to manage and fulfil capital management strategies and objectives, including Capital Adequacy Policy, Capital Planning Policy, Capital Impairment Management Policy, Capital Monitoring Policy, and Dividend Policy, BASILEA III Implementation . A new General Banking Law (LGB) version was published in January 2019 . Adopting the capital levels established in the Basel III standards is among the most relevant changes . In 2020 , the final versions of the rules governing the new capital models for Chilean banks were published . According to the new General Banking Law (updated through Law No 21 , 130 ), the minimum capital requirements have increased in quantity and quality . Total regulatory capital remains at 8 % of risk - weighted assets but includes credit, market and operational risk . Minimum Tier 1 capital increased from 4 . 5 % to 6 % of risk - weighted assets, of which up to 1 . 5 % can be Additional Tier 1 (AT 1 ), either in the form of preferred shares or bonds with no fixed maturity, which can be convertible into shares . Tier 2 capital is now set at 2 % of risk - weighted assets . Additional capital requirements are incorporated through a conservation buffer of 2 . 5 % of risk - weighted assets . Furthermore, in coordination with the FMC, the Central Bank may establish an additional countercyclical buffer of up to 2 . 5 % of risk - weighted assets consistent with the FMC . Both buffers should be composed of core capital . In addition, the FMC was empowered, subject to the favourable agreement of the Council of the Central Bank of Chile (BCCh), to define by regulation the new methodologies for calculating assets weighted by credit, market and operational risk ; the conditions for issuing hybrid AT 1 instruments ; the determination and capital charges for local systemically important banks ; prudential discounts to regulatory capital ; and to require additional measures, including higher capital, for banks with deficiencies in the supervisory capital assessment process (Pillar II) . Pillar II aims to ensure that banks maintain a level of capital commensurate with their risk profile and encourage the development and use of appropriate processes for monitoring and managing the risks they face . To this end, banks are responsible for developing an internal capital adequacy assessment process . Supervisors should review their internal strategies and assessments and intervene early when they are not satisfied with the outcome of this process . As a result, supervisors may require additional capital over and above the minimum requirement to ensure a sufficient level to address risks, especially in adverse credit cycles . In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 219

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 48 - INFORMATION ON REGULATORY CAPITAL AND CAPITAL ADEQUACY INDICATORS, continued The result will be a simplified report with the conclusions of the self - assessment process, which in its first version in 2021 will only include credit risk, and in 2022 will only include Pillar I risks . From 2023 a full report will be required . Pillar III promotes market discipline and financial transparency by disclosing meaningful and timely information, allowing information users to understand the risk profile of local banking institutions and their capital structure, thereby reducing information asymmetries . Banks must publish the first Pillar 3 document with information for the quarter of January - March 2023 . The new rules for calculating risk - weighted assets came into force in December 2021 . Therefore, the Bank implemented the rules through a multidisciplinary group, which conducted the required developments, including applying the files designed by the regulator for this purpose . Capital metrics Minimum capital requirement Under the General Banking Law, a bank must have a minimum of UF 800 , 000 (approximately MCh $ 28 , 460 or US $ 35 , 828 million as of March 31 , 2023 ) of paid - up capital and reserves, calculated under FMC Rules . Capital requirement According to the General Law of Banks, banks must maintain regulatory capital of at least 8 % of risk - weighted assets, net of required credit loss, as well as a paid - in capital and reserve requirement ('core capital') of at least 3 % of total assets, also net of credit loss . Regulatory and core capital is calculated based on the Interim Consolidated Financial Statements prepared under the CASB issued by the FMC . As Santander is the result of a merger between two predecessors with a relevant market share in the Chilean market, a minimum regulatory capital to risk - weighted assets ratio of 11 % is currently required . Regulatory capital is defined as the aggregate of: a bank's paid - up capital and reserves, excluding capital attributable to foreign subsidiaries and branches or core capital; its subordinated bonds, valued at their placement price (but decreasing by 20.0% for each year during the period beginning six years before maturity), for up to 50.0% of their basic capital; and its voluntary provisions for credit loss of up to 1.25% of risk - weighted assets. As of August 21 , 2020 , Circular No 2 , 265 indicating the new treatment was published, in which the amounts of loans guaranteed by the Chilean Treasury, CORFO and FOGAPE are incorporated into category 2 of the risk - weighted asset classification . Consequently, their credit risk weighting was reduced from 100 % to 10 % . From December 1, 2021, the definition of regulatory capital changed and is defined as follows: Paid - up capital of the bank in terms of subscribed and paid - up ordinary shares ; Surcharge paid for the instruments included in this capital component . Reserves, both non - earnings and earnings, for depreciation of bonds with no fixed maturity and forfeiture of bonds with no fixed maturity . Items of 'accumulated other comprehensive income’ . Retained earnings from prior years, profit (loss) for the year, net of provisions for minimum dividend, the repricing of bonds with no fixed maturity and interest and/or dividend payments on issued regulatory capital financial instruments . Non - controlling interest as indicated in the Compendium of Accounting Standards (CASB) . In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 220

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 48 - INFORMATION ON REGULATORY CAPITAL AND CAPITAL ADEQUACY INDICATORS, continued Total assets, risk - weighted assets and components of effective equity In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 221 Global consolidated Global consolidated Total assets, risk - weighted assets and components of effective equity under Basel III As of December 31, 2022 As of March 31, 2023 Item No MCh$ MCh$ 68,164,604 69,505,768 Total assets according to the statement of financial position 1 - Investment in unconsolidated subsidiaries 2 12,270,810 11,968,993 Assets discounted from regulatory capital, other than item 2 3 2,890,350 3,016,167 Credit equivalents 4 2,776,542 2,436,845 Contingent loans 5 243,345 103,223 Assets arising from the intermediation of financial instruments 6 61,317,340 62,886,564 = (1 - 2 - 3+4+5 - 6) Total assets for regulatory purposes 7 28,401,718 28,617,629 Credit risk - weighted assets, estimated according to standardised methodology (CRWAs) 8.a - - Credit risk - weighted assets, estimated according to internal methodologies (CRWAs) 8.b 5,554,604 5,444,649 Market risk - weighted assets (MRWAs) 8 4,070,594 4,324,669 Operational risk - weighted assets (ORWAs) 10 38,026,916 38,386,947 = (8.a/8.b+9+10) Risk Weighted Assets (RWAs) 11.a 38,026,916 38,386,947 = (8.a/8.b+9+10) Risk - weighted assets, after application of the output floor (RWAs) 11.b 4,128,808 3,920,676 Shareholders' equity 12 109,563 113,614 Non - controlling interest 13 - - Goodwill 14 - - Excess of minority investments 15 4,238,371 4,034,290 = (12+13 - 14 - 15) Common equity tier 1 (CET1) equivalent 16 25,455 18,701 Additional deductions to Common Equity Tier 1, other than item 2 17 4,212,916 4,015,589 = (16 - 17 - 2) Common Equity Tier 1 (CET1) 18 - - Voluntary (additional) provisions allocated as Additional Tier 1 capital (AT1) 19 190,135 191,935 Subordinated bonds imputed as Additional Tier 1 capital (AT1) 20 - - Preference shares imputed to Additional Tier 1 capital (AT1) 21 590,247 552,139 Bonds without fixed maturity imputed to Additional Tier 1 capital (AT1) 22 - - Discounts applied to AT1 23 780,382 744,074 = (19+20+21+21+22 - 23) Additional Tier 1 capital (AT1) 24 4,993,298 4,759,663 = (18+24) Tier 1 capital 25 293,000 293,000 Voluntary (additional) provisions imputed as Tier 2 capital (T2) 26 1,472,749 1,474,221 Subordinated bonds imputed as Tier 2 capital (T2) 27 1,765,749 1,767,221 = (26+27) Equivalent Tier 2 capital (T2) 28 - - Discounts applied to T2 29 1,765,749 1,767,221 = (28 - 29) Tier 2 capital (T2) 30 6,759,047 6,526,884 = (25+30) Effective equity 31 444,662 389,056 Additional core capital required to build up the conservation buffer 32 - - Additional core capital required for the constitution of the cyclical buffer 33 142,601 143,951 Additional core capital required for systemically rated banks 34 - - Additional capital required for the assessment of the adequacy of effective equity (Pillar 2) 35

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31, 2023, and 2022, and as of December 31, 2022 NOTE 48 - INFORMATION ON REGULATORY CAPITAL AND CAPITAL ADEQUACY INDICATORS, continued Solvency indicators and Basel III compliance indicators In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 222 Global consolidated Global consolidated Solvency indicators and Basel III compliance indicators As of December 31, 2022 As of March 31, 2023 (in % with two decimals) (*) Item No % % Leverage indicator (T1_I18/T1_I7) 1 6.87% 6.39% Leverage indicator to be met by the bank, considering the minimum requirements. 1.a Core capital indicator (T1_I18/T1_I11.b) 2 11.08% 10.46% Indicator of core capital to be met by the bank, considering the minimum requirements. 2.a - Capital buffers deficit 2.b Tier 1 capital indicator (T1_I25/T1_I11.b) 3 13.13% 12.40% Tier 1 capital indicator to be met by the bank, considering the minimum requirements. 3.a Effective net worth indicators (T1_I31/T1_I11.b) 4 8.00% 8.00% Effective net worth indicator that the bank must meet, considering the minimum requirements. 4.a 9.50% 9.50% Effective net worth indicator to be met by the bank, considering the Article 35 bis charge, if applicable 4.b 10.50% 10.90% Effective net worth indicator to be met by the bank, considering minimum requirements, conservation buffer and countercyclical buffer 4.c Solvency rating 5 Compliance indicators for solvency 1.03% 1.02% Voluntary (additional) provisions charged to Tier 2 capital (T2) in relation to CRWAS (T1_I26/ (T1_I8.a or I8.b)) 6 34.96% 36.71% Subordinated bonds imputed in Tier 2 capital (T2) relative to core capital. 7 18.52% 18.53% Additional Tier 1 capital (AT1) in relation to core capital (T1_I24/T1_I18) 8 0.50% 0.50% Voluntary (additional) provisions and subordinated debentures that are imputed to Additional Tier 1 (AT1) capital in relation to RWAs (T1_I19+T1_I20 / T1_I11.b) 9

Banco Santander - Chile and Affiliates NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS As of March 31 , 2023 , and 2022 , and as of December 31 , 2022 NOTE 49 - SUBSEQUENT EVENTS Shareholders' Meeting At the Ordinary Shareholders' Meeting of Banco Santander - Chile held April 19 , 2023 , along with the approval of the 2022 Consolidated Financial Statements, the shareholders resolved to distribute 60 % of the net profit for the year ("Profit attributable to the equity holders"), which amounted to MCh $ 485 , 191 . These earnings are equivalent to a dividend of Ch $ 2 , 57469221 per share . In addition, it was also approved that 40 % be allocated to : Increasing Retained Earnings from prior years by the amount necessary to meet the payment of the next three interest coupons on the bonds with no fixed maturity. Increasing the Bank's Reserves and other retained earnings by the remaining amount. Furthermore, the following were elected as full directors : Claudio Melandri Hinojosa (chairman), Rodrigo Vergara Montes (independent), Orlando Poblete Iturrate (independent), Felix de Vicente Mingo (independent), Maria Olivia Recart Herrera (independent), Ana Dorrego de Carlos, Rodrigo Echenique Gordillo, Lucia Santa Cruz Sutil, Blanca Bustamante Bravo (independent) and as alternate directors Juan Pedro Santa Maria Perez (independent) and Alfonso Gómez Morales (independent) . At the aforementioned Ordinary Shareholders' Meeting, PricewaterhouseCoopers Consultores Auditores was also approved as external auditors for the 2023 financial year . Group At the Extraordinary Board Meeting of Getnet held on April 5 , 2023 , Mr Carlos Alfredo Rocca Vidal resigned as General Manager of the Company, and the Board unanimously appointed Mr Fernando Benito Olivares as the new General Manager . Bond issuance As of April 12 , 2023 , and with a settlement date of April 19 , 2023 , a bond was issued in the amount of USD 30 , 000 , 000 maturing on April 19 , 2024 , at a placement rate of 5 . 837 % . Issuance of consolidated financial statements As of April 25 , 2023 , the Directors and Audit Committee approved these Interim Consolidated Financial Statements . There are no other subsequent events to be disclosed that occurred between April 1 , 2023 , and the date of issue of these Interim Consolidated Financial Statements (April 25 , 2023 ) . In teri m C on s oli d ate d Fi n anci al Sta te me n ts March 202 3 / B anc o San tan d e r C hil e 223 ROMÁN BLANCO REINOSA Chief Executive Officer JONATHAN COVARRUBIAS H. Chief Accounting Officer