Basis of Presentation	9 Months Ended
Sep. 30, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The accompanying unaudited condensed consolidated financial statements have been prepared in conformity with U.S. generally accepted accounting principles (“GAAP”) for interim financial information and pursuant to the rules and regulations of the U.S. Securities and Exchange Commission (“SEC”). Accordingly, they do not include all of the information or footnotes necessary for a complete presentation of financial condition, results of operations, changes in shareholders’ equity, or cash flows in accordance with GAAP. In our opinion, all adjustments (consisting only of normal recurring adjustments) necessary for a fair presentation have been included. The results of operations for the three and nine months ended September 30, 2023 are not necessarily indicative of the results expected for the year ending December 31, 2023 or any other period. The September 30, 2023 condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes included in the First Internet Bancorp Annual Report on Form 10-K for the year ended December 31, 2022. The preparation of the condensed consolidated financial statements in conformity with GAAP requires management to make estimates, judgments, or assumptions that could have a material effect on the carrying value of certain assets and liabilities. These estimates, judgments, and assumptions affect the amounts reported in the condensed consolidated financial statements and the disclosures provided. The determination of the allowance for credit losses, income taxes, valuations and impairments of investment securities and goodwill, as well as fair value measurements of derivatives and loans held-for-sale are highly dependent upon management’s estimates, judgments, and assumptions, and changes in any of these could have a significant impact on the condensed consolidated financial statements. The condensed consolidated financial statements include the accounts of First Internet Bancorp (the “Company”), its wholly owned subsidiary, First Internet Bank of Indiana (the “Bank”), and the Bank’s three wholly owned subsidiaries, First Internet Public Finance Corp., JKH Realty Services, LLC and SPF15, Inc. All significant intercompany accounts and transactions have been eliminated in consolidation. The Company is subject to claims and lawsuits that arise primarily in the ordinary course of business. It is the opinion of management that the disposition or ultimate resolution of such claims and lawsuits will not have a material adverse effect on the consolidated financial position, results of operations, and cash flows of the Company. Other than the adoption of new accounting standards, the Company has not changed its significant accounting and reporting policies from those disclosed in the Company’s Annual Report on Form 10-K for the year ended December 31, 2022. Adoption of new accounting standards ASU 2016 - 13 On January 1, 2023, the Company adopted ASU 2016-03 Financial Instruments - Credit losses (“ASC 326”): Measurement of Credit Losses on Financial Instruments, as amended, which replaces the incurred loss methodology with an expected credit loss (“CECL”) methodology. The CECL estimate is applicable to financial assets measured at amortized cost, including loan receivables and held-to-maturity debt securities. It also applies to off-balance sheet credit exposures, including loan commitments, standby letters of credit, financial guarantees and other similar instruments. Additionally, ASC 326 resulted in changes to the accounting for available-for-sale debt securities. The Company adopted ASC 326 for all financial assets measured at amortized cost, available for sale securities and off-balance sheet credit exposures. Results for reporting periods beginning after January 1, 2023 are presented under ASC 326, while prior period amounts continue to be reported in accordance with previously applicable U.S. GAAP. The Company recorded a net decrease to retained earnings of $4.5 million as of January 1, 2023 for the cumulative effect of adopting ASC 326. The net adjustment to allowance for credit losses (“ACL”) includes $2.3 million related to loans, $1.9 million related to off-balance sheet credit exposures and $0.3 million related to held-to-maturity debt securities. ACL - Available-For-Sale (“AFS”) Debt Securities For AFS debt securities in an unrealized loss position, the Company first assesses whether it intends to sell, or it is more likely than not that it will be required to sell, the security before recovery of its amortized cost basis. If either of the criteria regarding intent or requirement to sell is met, the security’s amortized cost basis is written down to fair value through income. For AFS debt securities that do not meet the aforementioned criteria, the Company evaluates whether the decline in fair value has resulted from credit losses or other factors, such as interest rates or market conditions. In making this assessment, management considers the extent to which fair value is less than amortized cost, any changes to the rating of the security by a rating agency and adverse conditions specifically related to the security, among other factors. If this assessment indicates that a credit loss exists, the present value of cash flows expected to be collected from the security are compared to the amortized cost basis of the security. If the present value of cash flows expected to be collected is less than the amortized cost basis, a credit loss exists and an allowance for credit losses is recorded. Changes in the ACL are recorded as a provision for, or recovery of, credit loss expense. Losses are charged against the allowance when management believes that uncollectibility of an AFS debt security is confirmed or when either of the criteria regarding intent or requirement to sell is met. Accrued interest receivable on AFS debt securities totaled $2.3 million at September 30, 2023 and is excluded from the estimate of credit losses. The Company made the policy election to exclude accrued interest from the amortized cost basis of AFS debt securities and report accrued interest separately on the condensed consolidated balance sheet. ACL - Held-To-Maturity (“HTM”) Debt Securities Management measures expected credit losses on HTM debt securities on a collective basis by major security type. Accrued interest receivable on HTM debt securities totaled $1.1 million at September 30, 2023 and is excluded from the estimate of credit losses. The Company made the accounting policy election to not measure an ACL for accrued interest. Accrued interest deemed uncollectible will be written off through interest income. The HTM securities portfolio includes municipal securities, residential mortgage-backed-securities, commercial mortgage-backed securities and corporate securities. All residential and commercial mortgage-backed securities are U.S. government issued or sponsored and substantially all municipal and corporate securities are rated investment grade or above. The estimate of expected credit losses considers historical credit loss information that is adjusted for current conditions and reasonable and supportable forecasts. At the time of adoption, the estimated reserve was $0.3 million. ACL - Loans The ACL for loans represents management's estimate of all expected credit losses over the expected life of the Company’s existing loan portfolio. Management estimates the ACL balance using relevant available information about the collectability of cash flows, from internal and external sources, including historical information relating to past events, current conditions, and reasonable and supportable forecasts of future economic conditions. When the Company is unable to forecast future economic events, management may revert to historical information. Accrued interest receivable on loans totaled $17.9 million and is excluded from the estimate of credit losses. The Company made the accounting policy election to not measure an ACL for accrued interest receivable. Accrued interest deemed uncollectible will be written off through interest income. ACL - Loans - Collectively Evaluated The ACL is measured on a collective pool basis when similar risk characteristics exist. The Company has identified the following portfolio segments in the table below. The Company utilized a discounted cash flow (“DCF”) method to estimate the quantitative portion of the allowance for credit losses for loans evaluated on a collective pooled basis. For each segment, a loss driver analysis was performed in order to identify loss drivers and create a regression model for use in forecasting cash flows. In creating the DCF model, the Company has established a one-year reasonable and supportable forecast period with a one-year straight line reversion to the long-term historical average. Due to its minimal loss history, the Company elected to use peer data for a more conservative calculation. Key inputs into the DCF model include loan-level detail, including the amortized cost basis of individual loans, payment structure, loss history, and forecasted loss drivers. The Company utilizes a third party to provide economic forecasts under various scenarios, which are assessed quarterly considering the scenarios in the context of the current economic environment and loss risk. Expected credit losses are estimated over the contractual term of the loans and adjusted for prepayments when appropriate. The contractual term excludes extensions, renewals, and modifications unless the extension or renewal options are included in the original or modified contract at the reporting date and are not unconditionally cancellable by the Company. Additional key assumptions in the DCF model include the probability of default (“PD”), loss given default (“LGD”), and prepayment/curtailment rates. The Company utilizes the model-driven PD and a LGD derived from a method referred to as Frye Jacobs. The Frye Jacobs method is a mathematical formula that traces the relationship between LGD and PD over time and projects the LGD based on the level of PD forecasted. In all cases, the Frye Jacobs method is utilized to calculate LGDs during the forecast period, reversion period and long-term historical average. Prepayment and curtailment rates were calculated through third party analysis of the Company’s own data. Qualitative factors for the DCF and weighted-average remaining maturity methodologies include the following: •Changes in lending policies and procedures, including changes in underwriting standards and collections, charge-offs and recovery practices •Changes in international, national, regional and local conditions •Changes in the nature and volume of the portfolio and terms of loans •Changes in the experience, depth and ability of lending management •Changes in the volume and severity of past due loans and other similar conditions •Changes in the quality of the organization’s loan review system •Changes in the value of underlying collateral for collateral dependent loans •The existence and effect of any concentrations of credit and changes in the levels of such concentrations •The effect of other external factors (i.e. competition, legal and regulatory requirements) on the level of estimated credit losses ACL - Loans - Individually Evaluated Loans that do not share risk characteristics are evaluated on an individual basis and are excluded from the collective evaluation. The Company has determined that any loans which have been placed on nonaccrual status will be individually evaluated. Individual analysis will establish a specific reserve for loans, if necessary. Specific reserves on nonaccrual loans are typically based on management’s best estimate of the fair value of collateral securing these loans, adjusted for selling costs as necessary. ACL - Off-Balance Sheet Credit Exposures The Company estimates expected credit losses over the contractual period in which the Company is exposed to credit risk via a contractual obligation to extend credit, unless that obligation is unconditionally cancellable by the Company. The ACL for off-balance sheet credit exposure is recorded as a liability and adjusted as a provision for credit loss expense. The estimate includes consideration of the likelihood that funding will occur and an estimate of expected credit losses on commitments expected to be funded over its estimated life. Funding rates are based on a historical analysis of the Company’s portfolio, while estimates of credit losses are determined using the same loss rates as funded loans. Regulatory Capital As permitted by the federal banking regulatory agencies, the Company has elected the option to delay the impact of the day one adoption of ASC 326. Refer to “Item 2. Regulatory Capital Requirements” for details of the phase-in transition adjustments. Modified Loans to Borrowers Experiencing Financial Difficulty Concurrent with the adoption of ASU 2016-03, the Company adopted ASU 2022-02 “Financial Instruments-Credit Losses (ASC 326): Troubled Debt Restructurings and Vintage Disclosures,” as amended. The update eliminated the accounting guidance for troubled debt restructurings (“TDRs”) by creditors, while enhancing disclosure requirements for certain loan refinancings and restructurings by creditors when a borrower is experiencing financial difficulty.

Basis of Presentation

The accompanying unaudited condensed consolidated financial statements have been prepared in conformity with U.S. generally accepted accounting principles (“GAAP”) for interim financial information and pursuant to the rules and regulations of the U.S. Securities and Exchange Commission (“SEC”). Accordingly, they do not include all of the information or footnotes necessary for a complete presentation of financial condition, results of operations, changes in shareholders’ equity, or cash flows in accordance with GAAP. In our opinion, all adjustments (consisting only of normal recurring adjustments) necessary for a fair presentation have been included. The results of operations for the three and nine months ended September 30, 2023 are not necessarily indicative of the results expected for the year ending December 31, 2023 or any other period. The September 30, 2023 condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes included in the First Internet Bancorp Annual Report on Form 10-K for the year ended December 31, 2022.

The preparation of the condensed consolidated financial statements in conformity with GAAP requires management to make estimates, judgments, or assumptions that could have a material effect on the carrying value of certain assets and liabilities. These estimates, judgments, and assumptions affect the amounts reported in the condensed consolidated financial statements and the disclosures provided. The determination of the allowance for credit losses, income taxes, valuations and impairments of investment securities and goodwill, as well as fair value measurements of derivatives and loans held-for-sale are highly dependent upon management’s estimates, judgments, and assumptions, and changes in any of these could have a significant impact on the condensed consolidated financial statements.

The condensed consolidated financial statements include the accounts of First Internet Bancorp (the “Company”), its wholly owned subsidiary, First Internet Bank of Indiana (the “Bank”), and the Bank’s three wholly owned subsidiaries, First Internet Public Finance Corp., JKH Realty Services, LLC and SPF15, Inc. All significant intercompany accounts and transactions have been eliminated in consolidation.

The Company is subject to claims and lawsuits that arise primarily in the ordinary course of business. It is the opinion of management that the disposition or ultimate resolution of such claims and lawsuits will not have a material adverse effect on the consolidated financial position, results of operations, and cash flows of the Company.

Other than the adoption of new accounting standards, the Company has not changed its significant accounting and reporting policies from those disclosed in the Company’s Annual Report on Form 10-K for the year ended December 31, 2022.

Adoption of new accounting standards

On January 1, 2023, the Company adopted ASU 2016-03 Financial Instruments - Credit losses (“ASC 326”): Measurement of Credit Losses on Financial Instruments, as amended, which replaces the incurred loss methodology with an expected credit loss (“CECL”) methodology. The CECL estimate is applicable to financial assets measured at amortized cost, including loan receivables and held-to-maturity debt securities. It also applies to off-balance sheet credit exposures, including loan commitments, standby letters of credit, financial guarantees and other similar instruments. Additionally, ASC 326 resulted in changes to the accounting for available-for-sale debt securities.

The Company adopted ASC 326 for all financial assets measured at amortized cost, available for sale securities and off-balance sheet credit exposures. Results for reporting periods beginning after January 1, 2023 are presented under ASC 326, while prior period amounts continue to be reported in accordance with previously applicable U.S. GAAP. The Company recorded a net decrease to retained earnings of $4.5 million as of January 1, 2023 for the cumulative effect of adopting ASC 326. The net adjustment to allowance for credit losses (“ACL”) includes $2.3 million related to loans, $1.9 million related to off-balance sheet credit exposures and $0.3 million related to held-to-maturity debt securities.

ACL - Available-For-Sale (“AFS”) Debt Securities

For AFS debt securities in an unrealized loss position, the Company first assesses whether it intends to sell, or it is more likely than not that it will be required to sell, the security before recovery of its amortized cost basis. If either of the criteria regarding intent or requirement to sell is met, the security’s amortized cost basis is written down to fair value through income. For AFS debt securities that do not meet the aforementioned criteria, the Company evaluates whether the decline in fair value has resulted from credit losses or other factors, such as interest rates or market conditions. In making this assessment, management considers the extent to which fair value is less than amortized cost, any changes to the rating of the security by a rating agency and adverse conditions specifically related to the security, among other factors. If this assessment indicates that a credit loss exists, the present value of cash flows expected to be collected from the security are compared to the amortized cost basis of the security. If the present value of cash flows expected to be collected is less than the amortized cost basis, a credit loss exists and an allowance for credit losses is recorded. Changes in the ACL are recorded as a provision for, or recovery of, credit loss expense. Losses are charged against the allowance when management believes that uncollectibility of an AFS debt security is confirmed or when either of the criteria regarding intent or requirement to sell is met.

Accrued interest receivable on AFS debt securities totaled $2.3 million at September 30, 2023 and is excluded from the estimate of credit losses. The Company made the policy election to exclude accrued interest from the amortized cost basis of AFS debt securities and report accrued interest separately on the condensed consolidated balance sheet.

ACL - Held-To-Maturity (“HTM”) Debt Securities

Management measures expected credit losses on HTM debt securities on a collective basis by major security type. Accrued interest receivable on HTM debt securities totaled $1.1 million at September 30, 2023 and is excluded from the estimate of credit losses. The Company made the accounting policy election to not measure an ACL for accrued interest. Accrued interest deemed uncollectible will be written off through interest income. The HTM securities portfolio includes municipal securities, residential mortgage-backed-securities, commercial mortgage-backed securities and corporate securities. All residential and commercial mortgage-backed securities are U.S. government issued or sponsored and substantially all municipal and corporate securities are rated investment grade or above.

The estimate of expected credit losses considers historical credit loss information that is adjusted for current conditions and reasonable and supportable forecasts. At the time of adoption, the estimated reserve was $0.3 million.

The ACL for loans represents management's estimate of all expected credit losses over the expected life of the Company’s existing loan portfolio. Management estimates the ACL balance using relevant available information about the collectability of cash flows, from internal and external sources, including historical information relating to past events, current conditions, and reasonable and supportable forecasts of future economic conditions. When the Company is unable to forecast future economic events, management may revert to historical information.

Accrued interest receivable on loans totaled $17.9 million and is excluded from the estimate of credit losses. The Company made the accounting policy election to not measure an ACL for accrued interest receivable. Accrued interest deemed uncollectible will be written off through interest income.

ACL - Loans - Collectively Evaluated

The ACL is measured on a collective pool basis when similar risk characteristics exist. The Company has identified the following portfolio segments in the table below.

The Company utilized a discounted cash flow (“DCF”) method to estimate the quantitative portion of the allowance for credit losses for loans evaluated on a collective pooled basis. For each segment, a loss driver analysis was performed in order to identify loss drivers and create a regression model for use in forecasting cash flows.

In creating the DCF model, the Company has established a one-year reasonable and supportable forecast period with a one-year straight line reversion to the long-term historical average. Due to its minimal loss history, the Company elected to use peer data for a more conservative calculation.

Key inputs into the DCF model include loan-level detail, including the amortized cost basis of individual loans, payment structure, loss history, and forecasted loss drivers. The Company utilizes a third party to provide economic forecasts

under various scenarios, which are assessed quarterly considering the scenarios in the context of the current economic environment and loss risk.

Expected credit losses are estimated over the contractual term of the loans and adjusted for prepayments when appropriate. The contractual term excludes extensions, renewals, and modifications unless the extension or renewal options are included in the original or modified contract at the reporting date and are not unconditionally cancellable by the Company.

Additional key assumptions in the DCF model include the probability of default (“PD”), loss given default (“LGD”), and prepayment/curtailment rates. The Company utilizes the model-driven PD and a LGD derived from a method referred to as Frye Jacobs. The Frye Jacobs method is a mathematical formula that traces the relationship between LGD and PD over time and projects the LGD based on the level of PD forecasted. In all cases, the Frye Jacobs method is utilized to calculate LGDs during the forecast period, reversion period and long-term historical average. Prepayment and curtailment rates were calculated through third party analysis of the Company’s own data.

Qualitative factors for the DCF and weighted-average remaining maturity methodologies include the following:

•Changes in lending policies and procedures, including changes in underwriting standards and collections, charge-offs and recovery practices

•Changes in international, national, regional and local conditions

•Changes in the nature and volume of the portfolio and terms of loans

•Changes in the experience, depth and ability of lending management

•Changes in the volume and severity of past due loans and other similar conditions

•Changes in the quality of the organization’s loan review system

•Changes in the value of underlying collateral for collateral dependent loans

•The existence and effect of any concentrations of credit and changes in the levels of such concentrations

•The effect of other external factors (i.e. competition, legal and regulatory requirements) on the level of estimated credit losses

ACL - Loans - Individually Evaluated

Loans that do not share risk characteristics are evaluated on an individual basis and are excluded from the collective evaluation. The Company has determined that any loans which have been placed on nonaccrual status will be individually evaluated. Individual analysis will establish a specific reserve for loans, if necessary. Specific reserves on nonaccrual loans are typically based on management’s best estimate of the fair value of collateral securing these loans, adjusted for selling costs as necessary.

ACL - Off-Balance Sheet Credit Exposures

The Company estimates expected credit losses over the contractual period in which the Company is exposed to credit risk via a contractual obligation to extend credit, unless that obligation is unconditionally cancellable by the Company. The ACL for off-balance sheet credit exposure is recorded as a liability and adjusted as a provision for credit loss expense. The estimate includes consideration of the likelihood that funding will occur and an estimate of expected credit losses on commitments expected to be funded over its estimated life. Funding rates are based on a historical analysis of the Company’s portfolio, while estimates of credit losses are determined using the same loss rates as funded loans.

As permitted by the federal banking regulatory agencies, the Company has elected the option to delay the impact of the day one adoption of ASC 326. Refer to “Item 2. Regulatory Capital Requirements” for details of the phase-in transition adjustments.

Modified Loans to Borrowers Experiencing Financial Difficulty

Concurrent with the adoption of ASU 2016-03, the Company adopted ASU 2022-02 “Financial Instruments-Credit Losses (ASC 326): Troubled Debt Restructurings and Vintage Disclosures,” as amended. The update eliminated the accounting guidance for troubled debt restructurings (“TDRs”) by creditors, while enhancing disclosure requirements for certain loan refinancings and restructurings by creditors when a borrower is experiencing financial difficulty.