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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 10-Q

☒ | QUARTERLY REPORT UNDER SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934.

For the quarterly period ended September 30, 2021
OR

☐ | TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934.

Commission File Number 1-10485
TYLER TECHNOLOGIES, INC.
(Exact name of registrant as specified in its charter)

Delaware |  | 75-2303920
(State or other jurisdiction of incorporation or organization) |  | (I.R.S. employer identification no.)

5101 TENNYSON PARKWAY | PLANO | Texas | 75024
(Address of principal executive offices) | (City) | (State) | (Zip code)

(972) 713-3700
(Registrant’s telephone number, including area code)

Title of each class | Trading symbol | Name of each exchange on which registered
COMMON STOCK, $0.01 PAR VALUE | TYL | New York Stock Exchange

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☒ No ☐
Indicate by check mark whether the registrant has submitted electronically every Interactive Data file required to be submitted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ☒ No ☐
Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or an emerging growth company. See definition of “large accelerated filer," "accelerated filer,” "smaller reporting company," and "emerging growth company" in Rule 12b-2 of the Exchange Act. (Check one):

Large accelerated filer |  | ☒ |  | Accelerated filer |  | ☐
Non-accelerated filer |  | ☐ |  | Smaller reporting company |  | ☐
|  |  |  | Emerging growth company |  | ☐
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. |  | ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act). Yes ☐ No ☒
The number of shares of common stock of registrant outstanding on October 29, 2021 was 40,976,329.

PART I. FINANCIAL INFORMATION
ITEM 1. Financial Statements
TYLER TECHNOLOGIES, INC.
CONDENSED CONSOLIDATED STATEMENTS OF INCOME
(In thousands, except per share amounts)
(Unaudited)

|  | Three Months Ended September 30, |  | Nine Months Ended September 30,
|  | 2021 |  | 2020 |  | 2021 |  | 2020
Revenues: |  |  |  |  |  |  |  |
Software licenses and royalties |  | $ | 22,673 |  |  | $ | 19,937 |  |  | $ | 55,210 |  |  | $ | 55,699 |
Subscriptions |  | 252,942 |  |  | 89,290 |  |  | 554,979 |  |  | 256,651 |
Software services |  | 54,624 |  |  | 47,946 |  |  | 155,601 |  |  | 143,733 |
Maintenance |  | 117,833 |  |  | 117,979 |  |  | 356,566 |  |  | 349,104 |
Appraisal services |  | 7,146 |  |  | 5,394 |  |  | 19,876 |  |  | 15,853 |
Hardware and other |  | 4,655 |  |  | 5,200 |  |  | 16,518 |  |  | 12,338 |
Total revenues |  | 459,873 |  |  | 285,746 |  |  | 1,158,750 |  |  | 833,378 |
Cost of revenues: |  |  |  |  |  |  |  |
Software licenses and royalties |  | 1,547 |  |  | 1,177 |  |  | 4,151 |  |  | 3,047 |
Acquired software |  | 12,896 |  |  | 7,965 |  |  | 32,683 |  |  | 23,998 |
Subscriptions, software services and maintenance |  | 241,944 |  |  | 125,881 |  |  | 576,035 |  |  | 381,947 |
Appraisal services |  | 4,506 |  |  | 3,434 |  |  | 13,552 |  |  | 11,795 |
Hardware and other |  | 2,764 |  |  | 3,780 |  |  | 9,845 |  |  | 8,748 |
Total cost of revenues |  | 263,657 |  |  | 142,237 |  |  | 636,266 |  |  | 429,535 |
Gross profit |  | 196,216 |  |  | 143,509 |  |  | 522,484 |  |  | 403,843 |
Selling, general and administrative expenses |  | 101,847 |  |  | 66,819 |  |  | 289,543 |  |  | 196,825 |
Research and development expense |  | 24,002 |  |  | 21,642 |  |  | 69,243 |  |  | 65,952 |
Amortization of other intangibles |  | 14,183 |  |  | 5,392 |  |  | 31,015 |  |  | 16,176 |
Operating income |  | 56,184 |  |  | 49,656 |  |  | 132,683 |  |  | 124,890 |
Interest expense |  | (5,396) |  |  | (254) |  |  | (18,311) |  |  | (757) |
Other income, net |  | 445 |  |  | 534 |  |  | 1,249 |  |  | 2,497 |
Income before income taxes |  | 51,233 |  |  | 49,936 |  |  | 115,621 |  |  | 126,630 |
Income tax provision (benefit) |  | 7,063 |  |  | 10,652 |  |  | 8,945 |  |  | (14,096) |
Net income |  | $ | 44,170 |  |  | $ | 39,284 |  |  | $ | 106,676 |  |  | $ | 140,726 |
Earnings per common share: |  |  |  |  |  |  |  |
Basic |  | $ | 1.08 |  |  | $ | 0.98 |  |  | $ | 2.61 |  |  | $ | 3.52 |
Diluted |  | $ | 1.04 |  |  | $ | 0.94 |  |  | $ | 2.53 |  |  | $ | 3.39 |

See accompanying notes.
2

TYLER TECHNOLOGIES, INC.
CONDENSED CONSOLIDATED BALANCE SHEETS
(In thousands, except par value and share amounts)

|  | September 30, 2021 (unaudited) |  | December 31, 2020
ASSETS |  |  |  |
Current assets: |  |  |  |
Cash and cash equivalents |  | $ | 234,128 |  |  | $ | 603,623 |
Accounts receivable (less allowance for losses and sales adjustments of $10,575 in 2021 and $9,255 in 2020) |  | 538,119 |  |  | 382,319 |
Short-term investments |  | 49,355 |  |  | 72,187 |
Prepaid expenses |  | 47,546 |  |  | 30,864 |
Income tax receivable |  | 3,509 |  |  | 21,598 |
Other current assets |  | 5,599 |  |  | 2,479 |
Total current assets |  | 878,256 |  |  | 1,113,070 |
Accounts receivable, long-term |  | 14,917 |  |  | 21,417 |
Operating lease right-of-use assets |  | 40,449 |  |  | 18,734 |
Property and equipment, net |  | 176,745 |  |  | 168,004 |
Other assets: |  |  |  |
Software development costs, net |  | 22,570 |  |  | 9,121 |
Goodwill |  | 2,355,144 |  |  | 838,428 |
Other intangibles, net |  | 1,086,457 |  |  | 322,068 |
Non-current investments |  | 64,916 |  |  | 82,640 |
Other non-current assets |  | 43,484 |  |  | 33,792 |
Total assets |  | $ | 4,682,938 |  |  | $ | 2,607,274 |
LIABILITIES AND SHAREHOLDERS' EQUITY |  |  |  |
Current liabilities: |  |  |  |
Accounts payable |  | $ | 100,569 |  |  | $ | 14,011 |
Accrued liabilities |  | 180,281 |  |  | 83,084 |
Operating lease liabilities |  | 10,125 |  |  | 5,904 |
Deferred revenue |  | 495,250 |  |  | 461,278 |
Current portion of term loans |  | 30,000 |  |  | — |
Total current liabilities |  | 816,225 |  |  | 564,277 |
Revolving credit facility |  | — |  |  | — |
Term loans |  | 805,535 |  |  | — |
Convertible senior notes due 2026, net |  | 592,335 |  |  | — |
Deferred revenue, long-term |  | 53 |  |  | 100 |
Deferred income taxes |  | 227,537 |  |  | 40,507 |
Operating lease liabilities, long-term |  | 37,348 |  |  | 16,279 |
Other long-term liabilities |  | 3,132 |  |  | — |
Total liabilities |  | 2,482,165 |  |  | 621,163 |
Commitments and contingencies |  | — |  |  | — |
Shareholders' equity: |  |  |  |
Preferred stock, $10.00 par value; 1,000,000 shares authorized; none issued |  | — |  |  | — |
Common stock, $0.01 par value; 100,000,000 shares authorized; 48,147,969 shares issued and outstanding as of September 30, 2021 and December 31, 2020 |  | 481 |  |  | 481 |
Additional paid-in capital |  | 1,010,212 |  |  | 905,332 |
Accumulated other comprehensive loss, net of tax |  | (46) |  |  | (46) |
Retained earnings |  | 1,218,832 |  |  | 1,112,156 |
Treasury stock, at cost; 7,197,156 and 7,608,627 shares in 2021 and 2020, respectively |  | (28,706) |  |  | (31,812) |
Total shareholders' equity |  | 2,200,773 |  |  | 1,986,111 |
Total liabilities and shareholders' equity |  | $ | 4,682,938 |  |  | $ | 2,607,274 |

See accompanying notes.
3

TYLER TECHNOLOGIES, INC.
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
(In thousands)(Unaudited)

|  | Nine Months Ended September 30,
|  | 2021 |  | 2020
Cash flows from operating activities: |  |  |  |
Net income |  | $ | 106,676 |  |  | $ | 140,726 |
Adjustments to reconcile net income to cash provided by operating activities: |  |  |  |
Depreciation and amortization |  | 97,864 |  |  | 60,746 |
Share-based compensation expense |  | 80,360 |  |  | 54,112 |
Operating lease right-of-use assets expense |  | 7,016 |  |  | 4,233 |
Deferred income tax benefit |  | (15,681) |  |  | (2,458) |
Changes in operating assets and liabilities, exclusive of effects of acquired companies: |  |  |  |
Accounts receivable |  | 2,403 |  |  | 9,394 |
Income tax receivable |  | 24,171 |  |  | (14,270) |
Prepaid expenses and other current assets |  | (10,456) |  |  | (7,333) |
Accounts payable |  | (64,383) |  |  | (3,904) |
Operating lease liabilities |  | (3,904) |  |  | (5,121) |
Accrued liabilities |  | 4,817 |  |  | 6,276 |
Deferred revenue |  | 29,609 |  |  | 23,927 |
Increase in other long-term liabilities |  | (1,749) |  |  | — |
Net cash provided by operating activities |  | 256,743 |  |  | 266,328 |
Cash flows from investing activities: |  |  |  |
Additions to property and equipment |  | (20,770) |  |  | (19,064) |
Purchase of marketable security investments |  | (75,684) |  |  | (111,329) |
Proceeds from marketable security investments |  | 114,563 |  |  | 61,794 |
Purchase of investment in common shares |  | — |  |  | (10,000) |
Proceeds from the sale of investment in preferred shares |  | — |  |  | 15,000 |
Investment in software |  | (14,966) |  |  | (4,316) |
Cost of acquisitions, net of cash acquired |  | (2,088,394) |  |  | (261) |
Other |  | 463 |  |  | 13 |
Net cash used by investing activities |  | (2,084,788) |  |  | (68,163) |
Cash flows from financing activities: |  |  |  |
Net borrowings on revolving credit facility |  | — |  |  | — |
Payment on term loans |  | (57,500) |  |  | — |
Proceeds from term loans |  | 900,000 |  |  | — |
Proceeds from issuance of convertible senior notes |  | 600,000 |  |  | — |
Payment of debt issuance costs |  | (27,165) |  |  | — |
Purchase of treasury shares |  | (12,975) |  |  | (15,484) |
Payment of contingent consideration |  | — |  |  | (5,619) |
Proceeds from exercise of stock options |  | 46,433 |  |  | 100,732 |
Contributions from employee stock purchase plan |  | 9,757 |  |  | 8,209 |
Net cash provided by financing activities |  | 1,458,550 |  |  | 87,838 |
Net (decrease) increase in cash and cash equivalents |  | (369,495) |  |  | 286,003 |
Cash and cash equivalents at beginning of period |  | 603,623 |  |  | 232,682 |
Cash and cash equivalents at end of period |  | $ | 234,128 |  |  | $ | 518,685 |

See accompanying notes.
4

TYLER TECHNOLOGIES, INC.
CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY
(In thousands)
(Unaudited)

| Common Stock |  | Additional Paid-in Capital |  | Accumulated Other Comprehensive Income (Loss) |  | Retained Earnings |  | Treasury Stock |  | Total Shareholders' Equity
| Shares |  | Amount |  |  |  |  | Shares |  | Amount |
Balance at June 30, 2021 | 48,148 |  |  | $ | 481 |  |  | $ | 962,557 |  |  | $ | (46) |  |  | $ | 1,174,662 |  |  | (7,315) |  |  | $ | (29,663) |  |  | $ | 2,107,991 |
Net income | — |  |  | — |  |  | — |  |  | — |  |  | 44,170 |  |  | — |  |  | — |  |  | 44,170 |
Exercise of stock options and vesting of restricted stock units | — |  |  | — |  |  | 14,712 |  |  | — |  |  | — |  |  | 112 |  |  | 2,333 |  |  | 17,045 |
Employee taxes paid for withheld shares upon equity award settlement | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (3) |  |  | (1,451) |  |  | (1,451) |
Stock compensation | — |  |  | — |  |  | 29,461 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 29,461 |
Issuance of shares pursuant to employee stock purchase plan | — |  |  | — |  |  | 3,482 |  |  | — |  |  | — |  |  | 9 |  |  | 75 |  |  | 3,557 |
Treasury stock purchases | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Purchase consideration for conversion of unvested restricted stock | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Balance at September 30, 2021 | 48,148 |  |  | $ | 481 |  |  | $ | 1,010,212 |  |  | $ | (46) |  |  | $ | 1,218,832 |  |  | (7,197) |  |  | $ | (28,706) |  |  | $ | 2,200,773 |

| Common Stock |  | Additional Paid-in Capital |  | Accumulated Other Comprehensive Income (Loss) |  | Retained Earnings |  | Treasury Stock |  | Total Shareholders' Equity
| Shares |  | Amount |  |  |  |  | Shares |  | Amount |
Balance at June 30, 2020 | 48,148 |  |  | $ | 481 |  |  | $ | 843,998 |  |  | $ | (46) |  |  | $ | 1,018,778 |  |  | (7,917) |  |  | $ | (33,883) |  |  | $ | 1,829,328 |
Net income | — |  |  | — |  |  | — |  |  | — |  |  | 39,284 |  |  | — |  |  | — |  |  | 39,284 |
Exercise of stock options and vesting of restricted stock units | — |  |  | — |  |  | 7,578 |  |  | — |  |  | — |  |  | 75 |  |  | 817 |  |  | 8,395 |
Employee taxes paid for withheld shares upon equity award settlement | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (1) |  |  | (316) |  |  | (316) |
Stock compensation | — |  |  | — |  |  | 18,424 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 18,424 |
Issuance of shares pursuant to employee stock purchase plan | — |  |  | — |  |  | 2,963 |  |  | — |  |  | — |  |  | 11 |  |  | 69 |  |  | 3,032 |
Treasury stock purchases | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (2) |  |  | (2) |
Balance at September 30, 2020 | 48,148 |  |  | $ | 481 |  |  | $ | 872,963 |  |  | $ | (46) |  |  | $ | 1,058,062 |  |  | (7,832) |  |  | $ | (33,315) |  |  | $ | 1,898,145 |

5

TYLER TECHNOLOGIES, INC.
CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY
(In thousands)
(Unaudited)

| Common Stock |  | Additional Paid-in Capital |  | Accumulated Other Comprehensive Income (Loss) |  | Retained Earnings |  | Treasury Stock |  | Total Shareholders' Equity
| Shares |  | Amount |  |  |  |  | Shares |  | Amount |
Balance at December 31, 2020 | 48,148 |  |  | $ | 481 |  |  | $ | 905,332 |  |  | $ | (46) |  |  | $ | 1,112,156 |  |  | (7,609) |  |  | $ | (31,812) |  |  | $ | 1,986,111 |
Net income | — |  |  | — |  |  | — |  |  | — |  |  | 106,676 |  |  | — |  |  | — |  |  | 106,676 |
Exercise of stock options and vesting of restricted stock units | — |  |  | — |  |  | 13,089 |  |  | — |  |  | — |  |  | 458 |  |  | 33,344 |  |  | 46,433 |
Employee taxes paid for withheld shares for taxes upon equity award settlement | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (40) |  |  | (17,461) |  |  | (17,461) |
Stock compensation | — |  |  | — |  |  | 80,360 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 80,360 |
Issuance of shares pursuant to employee stock purchase plan | — |  |  | — |  |  | 9,559 |  |  | — |  |  | — |  |  | 26 |  |  | 198 |  |  | 9,757 |
Treasury stock purchases | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (32) |  |  | (12,975) |  |  | (12,975) |
Purchase consideration for conversion of unvested restricted stock awards | — |  |  | — |  |  | 1,872 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 1,872 |
Balance at September 30, 2021 | 48,148 |  |  | $ | 481 |  |  | $ | 1,010,212 |  |  | $ | (46) |  |  | $ | 1,218,832 |  |  | (7,197) |  |  | $ | (28,706) |  |  | $ | 2,200,773 |

| Common Stock |  | Additional Paid-in Capital |  | Accumulated Other Comprehensive Income (Loss) |  | Retained Earnings |  | Treasury Stock |  | Total Shareholders' Equity
| Shares |  | Amount |  |  |  |  | Shares |  | Amount |
Balance at December 31, 2019 | 48,148 |  |  | $ | 481 |  |  | $ | 739,478 |  |  | $ | (46) |  |  | $ | 917,336 |  |  | (8,839) |  |  | $ | (40,191) |  |  | $ | 1,617,058 |
Net income | — |  |  | — |  |  | — |  |  | — |  |  | 140,726 |  |  | — |  |  | — |  |  | 140,726 |
Exercise of stock options and vesting of restricted stock units | — |  |  | — |  |  | 74,162 |  |  | — |  |  | — |  |  | 1,055 |  |  | 26,570 |  |  | 100,732 |
Employee taxes paid for withheld shares for taxes upon equity award settlement | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (20) |  |  | (7,208) |  |  | (7,208) |
Stock compensation | — |  |  | — |  |  | 54,112 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 54,112 |
Issuance of shares pursuant to employee stock purchase plan | — |  |  | — |  |  | 5,211 |  |  | — |  |  | — |  |  | 31 |  |  | 2,998 |  |  | 8,209 |
Treasury stock purchases | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (59) |  |  | (15,484) |  |  | (15,484) |
Balance at September 30, 2020 | 48,148 |  |  | $ | 481 |  |  | $ | 872,963 |  |  | $ | (46) |  |  | $ | 1,058,062 |  |  | (7,832) |  |  | $ | (33,315) |  |  | $ | 1,898,145 |

6

Tyler Technologies, Inc.
Notes to Condensed Consolidated Financial Statements
(Unaudited)
(Tables in thousands, except per share data)
(1) Basis of Presentation
We prepared the accompanying condensed consolidated financial statements following the requirements of the Securities and Exchange Commission (“SEC”) and accounting principles generally accepted in the United States, or GAAP, for interim reporting. As permitted under those rules, certain footnotes or other financial information that are normally required by GAAP can be condensed or omitted for interim periods. Balance sheet amounts are as of September 30, 2021, and December 31, 2020, and operating result amounts are for the three and nine months ended September 30, 2021, and 2020, respectively, and include all normal and recurring adjustments that we considered necessary for the fair summarized presentation of our financial position and operating results. As these are condensed financial statements, one should also read the financial statements and notes included in our latest Form 10-K for the year ended December 31, 2020. Revenues, expenses, assets and liabilities can vary during each quarter of the year. Therefore, the results and trends in these interim financial statements may not be the same as those for the full year. Certain amounts for the previous year have been reclassified to conform to the current year presentation.
Comprehensive income (loss) is defined as the change in equity of a business enterprise during a period from transactions and other events and circumstances from non-owner sources and includes all components of net income (loss) and other comprehensive income (loss). We had no items of other comprehensive income (loss) for the three and nine months ended September 30, 2021, and 2020.
On April 21, 2021, the Company acquired NIC, Inc. (“NIC”) as contemplated by the Agreement and Plan of Merger dated February 9, 2021. The results of NIC are include in condensed consolidated financial statements since the date of acquisition. See Note 3, Acquisitions for further information.
(2) Accounting Standards and Significant Accounting Policies
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Except for the January 1, 2021, adoption of ASU No. 2020-06, Debt-Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging-Contracts in Entity’s Own Equity (Subtopic 815-40): Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity (“ASU 2020-06”), there have been no changes to our significant accounting policies described in the Annual Report on Form 10-K for the year ended December 31, 2020, filed with the SEC on February 19, 2021, that have had a material impact on our condensed consolidated financial statements and related notes. See Recently Adopted Accounting Pronouncements below.
Impacts of the COVID-19 Pandemic
The pandemic continues to delay some government procurement processes and is expected to impact our ability to complete certain implementations, negatively impacting our revenue. Because an increasing portion of our revenues are recurring, the effect of COVID-19 on our results of operations may also not be fully reflected for some time. It could also negatively impact the timing of client payments to us. We continue to monitor these trends in order to respond to the ever-changing impact of COVID-19 on our clients and Tyler’s operations.
For the nine months ended September 30, 2021, excluding the impact of 2021 acquisitions, the impact of the COVID-19 pandemic resulted in lower revenues from software licenses and software services. Lower software licenses compared to prior periods are in part attributed to slower sales cycles as some government procurement processes have been delayed and contract signings have been pushed to future periods. Software services revenues have been affected by a decline in billable travel revenue, as most services are now being delivered virtually rather than on-site. Lower revenues compared to prior periods were partially offset by cost savings attributed to lower spend on travel, user conferences and trade show expenses, health claims and other employee-related expenses. As travel restrictions are relaxed, software services and appraisal services revenues are increasing. Also, we have adapted the way we do business by encouraging web and video conferencing, conducting virtual sales demonstrations and delivering professional services remotely, which result in increases in staff utilization rates and billable time.
7

For the three and nine months ended September 30, 2021, total revenues include subscriptions revenue and software services revenues of $43.3 million and $58.4 million, respectively, from NIC's TourHealth and pandemic unemployment services offerings. We currently expect these COVID-related revenues to decrease significantly in the fourth quarter of 2021 and wind down in the first half of 2022.
Recurring revenues from subscriptions and maintenance comprised 79% of our total consolidated revenue for the nine months ended September 30, 2021, and include transaction-based revenue streams such as e-filing, online payments, and digital government services. On March 9, 2021, we issued 0.25% Convertible Senior Notes due 2026 (the “Convertible Senior Notes”) in the aggregate principal amount of $600 million. As of September 30, 2021, we had $348.4 million in cash and investments and $842.5 million of principal outstanding borrowings under our 2021 Credit Agreement executed on April 21, 2021. As of September 30, 2021, we had available borrowing capacity of $500 million under our 2021 Credit Agreement.
We have recorded no impairment to goodwill or other assets as of the balance sheet date. Due to significant uncertainty surrounding the pandemic and market conditions, management’s judgment regarding this could change in the future.
USE OF ESTIMATES
The preparation of our financial statements in conformity with GAAP requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Significant items subject to such estimates and assumptions include revenue recognition, determining the nature and timing of satisfaction of performance obligations, determining the standalone selling price (“SSP”) of performance obligations, variable consideration, and other obligations such as returns and refunds; loss contingencies; the estimated useful life of deferred commissions; the carrying amount of goodwill; the carrying amount and estimated useful lives of intangible assets; the carrying amount of operating lease right-of-use assets and operating lease liabilities; determining share-based compensation expense; the valuation allowance for receivables; and determining the potential outcome of future tax consequences of events that have been recognized on our consolidated financial statements or tax returns. Actual results could differ from estimates.
REVENUE RECOGNITION
Nature of Products and Services:
We earn revenue from software licenses, royalties, subscription-based services, software services, post-contract customer support (“PCS” or “maintenance”), hardware, and appraisal services. Revenue is recognized upon transfer of control of promised products or services to customers in an amount that reflects the consideration we expect to receive in exchange for those products and services. We determine revenue recognition through the following steps:
•Identification of the contract, or contracts with a customer
•Identification of the performance obligations in the contract
•Determination of the transaction price
•Allocation of the transaction price to the performance obligations in the contract
•Recognition of revenue when, or as, we satisfy a performance obligation
Most of our software arrangements with customers contain multiple performance obligations that range from software licenses, installation, training, and consulting to software modification and customization to meet specific customer needs (services), hosting, and PCS. For these contracts, we account for individual performance obligations separately when they are distinct. We evaluate whether separate performance obligations can be distinct or should be accounted for as one performance obligation. Arrangements that include software services, such as training or installation, are evaluated to determine whether the customer can benefit from the services either on their own or together with other resources readily available to the customer and whether the services are separately identifiable from other promises in the contract. The transaction price is allocated to the distinct performance obligations on a relative SSP basis. We determine the SSP based on our overall pricing objectives, taking into consideration market conditions and other factors, including the value of our contracts, the applications sold, customer demographics, and the number and types of users within our contracts. Revenue is recognized net of allowances for sales adjustments and any taxes collected from customers, which are subsequently remitted to governmental authorities.
8

Significant Judgments:
Our contracts with customers often include multiple performance obligations to a customer. When a software arrangement (license or subscription) includes both software licenses and software services, judgment is required to determine whether the software license is considered distinct and accounted for separately, or not distinct and accounted for together with the software services and recognized over time.
The transaction price is allocated to the separate performance obligations on a relative SSP basis. We determine the SSP based on our overall pricing objectives, taking into consideration market conditions and other factors, including the value of our contracts, the applications sold, customer demographics, and the number and types of users within our contracts. We use a range of amounts to estimate SSP when we sell each of the products and services separately and need to determine whether there is a discount to be allocated based on the relative SSP of the various products and services. In instances where SSP is not directly observable, such as when we do not sell the product or service separately, we determine SSP using the expected cost-plus margin approach.
For arrangements that involve significant production, modification or customization of the software, or where software services otherwise cannot be considered distinct, we recognize revenue as control is transferred to the customer over time using progress-to-completion methods. Depending on the contract, we measure progress-to-completion primarily using labor hours incurred, or value added. The progress-to-completion method generally results in the recognition of reasonably consistent profit margins over the life of a contract because we can provide reasonably dependable estimates of contract billings and contract costs. We use the level of profit margin that is most likely to occur on a contract. If the most likely profit margin cannot be precisely determined, the lowest probable level of profit margin in the range of estimates is used until the results can be estimated more precisely. These arrangements are often implemented over an extended time period and occasionally require us to revise total cost estimates. Amounts recognized in revenue are calculated using the progress-to-completion measurement after giving effect to any changes in our cost estimates. Changes to total estimated contract costs, if any, are recorded in the period they are determined. Estimated losses on uncompleted contracts are recorded in the period in which we first determine that a loss is apparent.
For e-filing transaction fees and transaction-based revenues from digital government services and online payments, we have the right to charge the customer an amount that directly corresponds with the value to the customer of our performance to date. Therefore, we recognize revenue for these services over time based on the amount billable to the customer in accordance with the 'as invoiced' practical expedient in ASC 606-10-55-18. In some cases, we are paid on a fixed fee basis and recognize the revenue ratably over the contractual period. Typically, the structure of our arrangements does not give rise to variable consideration. However, in those instances whereby variable consideration exists, we include in our estimates, additional revenue for variable consideration when we believe we have an enforceable right, the amount can be estimated reliably and its realization is probable.
Refer to Note 13 - “Disaggregation of Revenue” for further information, including the economic factors that affect the nature, amount, timing, and uncertainty of revenue and cash flows of our various revenue categories.
Contract Balances:
Accounts receivable and allowance for losses and sales adjustments
Timing of revenue recognition may differ from the timing of invoicing to customers. We record an unbilled receivable when revenue is recognized prior to invoicing, or deferred revenue when invoicing occurs prior to recognizing revenue. For multi-year agreements, we generally invoice customers annually at the beginning of each annual coverage period. We record an unbilled receivable related to revenue recognized for on-premises licenses as we have an unconditional right to invoice and receive payment in the future related to those licenses.
At September 30, 2021, and December 31, 2020, total current and long-term accounts receivable, net of allowance for losses and sales adjustments, was $553.0 million and $403.7 million, respectively. We have recorded unbilled receivables of $147.4 million and $140.8 million at September 30, 2021 and December 31, 2020, respectively. Included in unbilled receivables are retention receivables of $8.2 million and $13.1 million at September 30, 2021 and December 31, 2020, respectively, which become payable upon the completion of the contract or completion of our fieldwork and formal hearings. Unbilled receivables expected to be collected within one year have been included with accounts receivable, current portion in the accompanying condensed consolidated balance sheets. Unbilled receivables and retention receivables expected to be collected past one year have been included with accounts receivable, long-term portion in the accompanying condensed consolidated balance sheets.
9

We maintain allowances for losses and sales adjustments, which losses are recorded against revenue at the time the loss is incurred. Since most of our clients are domestic governmental entities, we rarely incur a credit loss resulting from the inability of a client to make required payments. Events or changes in circumstances that indicate the carrying amount for the allowances for losses and sales adjustments may require revision, include, but are not limited to, managing our client’s expectations regarding the scope of the services to be delivered and defects or errors in new versions or enhancements of our software products. Our allowance for losses and sales adjustments of $10.6 million and $9.3 million at September 30, 2021, and December 31, 2020, respectively, does not include provisions for credit losses. As of January 1, 2020, we adopted ASU 2016-13, Financial Instruments - Credit Losses, and primarily evaluated our historical experience with credit losses related to trade and other receivables. Because we rarely experience credit losses with our clients, we have not recorded a material reserve for credit losses.
GOODWILL AND OTHER INTANGIBLE ASSETS
Goodwill
We assess goodwill for impairment annually, or more frequently whenever events or changes in circumstances indicate its carrying value may not be recoverable. We begin with the qualitative assessment of whether it is more likely than not that a reporting unit's fair value is less than its carrying value before applying the quantitative assessment described below. If it is determined through the evaluation of events or circumstances that the carrying value may not be recoverable, we perform a comparison of the estimated fair value of the reporting unit to which the goodwill has been assigned to the sum of the carrying value of the assets and liabilities of that unit. If the sum of the carrying value of the assets and liabilities of a reporting unit exceeds the estimated fair value of that reporting unit, the carrying value of the reporting unit's goodwill is reduced to its fair value through an adjustment to the goodwill balance, resulting in an impairment charge. The fair values calculated in our impairment tests are determined using discounted cash flow models involving several assumptions (Level 3 inputs). The assumptions that are used are based upon what we believe a hypothetical marketplace participant would use in estimating fair value. We evaluate the reasonableness of the fair value calculations of our reporting units by comparing the total of the fair value of all of our reporting units to our total market capitalization.
We have historically evaluated goodwill for impairment annually as of April 1, or more frequently if impairment indicators arose. During the second quarter 2021, we voluntarily changed the date of our annual assessment of goodwill to October 1 for all reporting units. The change in testing date for goodwill impairment is a change in accounting principle, which management believes is preferable as the new date of the assessment better aligns with our annual planning process. The change in the assessment date does not delay or avoid a potential impairment charge nor does it change our requirement to assess goodwill on an interim date between scheduled annual testing dates if triggering events are present. To ensure that no lapse in an assessment occurred since the prior period, we performed qualitative assessments for all reporting units except for the data and insights and platform technologies reporting units. As a result of these qualitative assessments, we determined that it was not more likely that an impairment existed; therefore, we did not perform Step 1 quantitative impairment test. We did perform a quantitative assessment for goodwill of $75.6 million and $78.3 million associated with our data and insights reporting unit and platform technologies units, respectively. For most of our reporting units, goodwill relates to a combination of legacy and acquired businesses, and as a result, those units have fair values that substantially exceed their underlying carrying values. For other reporting units, in particular our data and insights and platform technologies units, goodwill entirely relates to recently acquired businesses and as a result those units do not have significant excess fair values over carrying values. As a result of our interim qualitative and quantitative assessments, we concluded no impairment existed as of second quarter 2021. Since our assessment, we had no triggering events as of September 30, 2021.
Determining the fair value of our reporting units involves the use of significant estimates and assumptions and considerable management judgment. We base our fair value estimates on assumptions we believe to be reasonable at the time, but such assumptions are subject to inherent uncertainty. Changes in market conditions or other factors outside of our control, such as the COVID-19 pandemic, could cause us to change key assumptions and our judgment about a reporting unit’s prospects. Similarly, in a specific period, a reporting unit could significantly underperform relative to its historical or projected future operating results. Either situation could result in a meaningfully different estimate of the fair value of our reporting units and a consequent future impairment charge.
10

RECENTLY ADOPTED ACCOUNTING PRONOUNCEMENTS
In August 2020, the FASB issued ASU 2020-06, which simplifies the accounting for convertible instruments by removing the separation models for (1) convertible debt with a cash conversion feature and (2) convertible instruments with a beneficial conversion feature. As a result, a convertible debt instrument will be accounted for as a single liability measured at its amortized cost. These changes will reduce reported interest expense and increase reported net income for entities that have issued a convertible instrument that was bifurcated according to previously existing rules. ASU 2020-06 also requires the application of the if-converted method for calculating diluted earnings per share and the treasury stock method will be no longer available. This standard will be effective for the Company’s fiscal years beginning in the first quarter of 2022, with early adoption permitted. The Company has elected to early adopt this standard as of January 1, 2021. Our accounting and disclosures related to our convertible senior notes issued on March 9, 2021, reflect the requirements of this standard. For further information, please refer to Note 7, Debt.
In December 2019, the FASB issued ASU 2019-12, Simplifying the Accounting for Income Taxes, (“ASU 2019-12”) which simplifies the accounting for income taxes, eliminates certain exceptions within ASC 740, Income Taxes, and clarifies certain aspects of the current guidance to promote consistency among reporting entities. The new standard is effective for fiscal years beginning after December 15, 2020. We adopted ASU 2019-12 as of January 1, 2021. The adoption of this standard did not have a material impact on our consolidated financial statements.
(3) Acquisitions
On September 9, 2021, we acquired all the equity interest of Ultimate Information Systems, Inc. (dba Arx). Arx is a cloud-based platform which creates accessible technology to enable a modern-day police force that is fully transparent, accountable, and a trusted resource to the community it serves. The total purchase price, net of cash acquired, was approximately $12.8 million, of which $12.4 million was paid in cash and approximately $0.5 million was accrued for indemnity holdbacks, subject to certain post-closing adjustments.
On September 1, 2021, we acquired VendEngine, Inc. (VendEngine) as contemplated by the Agreement and Plan of Merger dated June 3, 2021. As result of the merger, VendEngine became a direct subsidiary of the Company. VendEngine is a cloud-based software provider focused on financial technology for the corrections market. The total purchase price, net of cash acquired of $3.0 million, was approximately $83.1 million, consisting of $80.2 million paid in cash, and approximately $5.9 million related to indemnity holdbacks, subject to certain post-closing adjustments.
In connection with this transaction, we acquired total tangible assets of $6.6 million and assumed liabilities of approximately $4.3 million. We recorded goodwill of approximately $58.7 million, none of which is expected to be deductible for tax purposes, and other identifiable intangible assets of approximately $32.0 million. The $32.0 million of intangible assets are attributable to customer relationships, acquired software, trade name and will be amortized over a weighted average period of approximately 17 years. We recorded net deferred tax liabilities of $7.5 million related to the tax effect of our estimated fair value allocations.
VendEngine provides a suite of financial and communications applications ranging from deposit technologies for commissary, ordering, and warehouse technology to a host of informational, electronic communications, security, accounting, and financial trust management components for more than 300 correctional facilities across 32 states and the Caribbean. Therefore, the goodwill of approximately $58.7 million arising from this acquisition is primarily attributed to our ability to generate increased revenues, earnings and cash flow by expanding our addressable market and client base.
On April 21, 2021 (the “Closing Date”), we acquired NIC as contemplated by the Agreement and Plan of Merger dated February 9, 2021. As result of the merger, NIC became a direct subsidiary of the Company and NIC’s subsidiaries became indirect subsidiaries. NIC is a leading digital government solutions and payment company that primarily serves federal and state government agencies. The total purchase price, net of cash acquired of $331.8 million, was approximately $2.0 billion, consisting of cash paid of $2.3 billion and $1.9 million of purchase consideration related to the conversion of unvested restricted stock awards.
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We have performed a preliminary valuation analysis of the fair market value of NIC’s assets and liabilities. The following table summarizes the preliminary allocation of the purchase price as of the acquisition date:

(In thousands) |  |
Cash |  | $ | 331,783 |
Accounts receivable |  | 149,515 |
Other current assets |  | 12,988 |
Other noncurrent assets |  | 20,974 |
Identifiable intangible assets |  | 790,000 |
Goodwill |  | 1,438,603 |
Accounts payable |  | (150,099) |
Accrued expenses |  | (63,809) |
Other noncurrent liabilities |  | (11,493) |
Deferred revenue |  | (3,294) |
Deferred tax liabilities, net |  | (194,676) |
Total consideration |  | $ | 2,320,492 |

In connection with this transaction, we acquired total tangible assets of $515.3 million and assumed liabilities of approximately $228.7 million. We recorded goodwill of approximately $1.4 billion, none of which is expected to be deductible for tax purposes, and other identifiable intangible assets of approximately $790.0 million. The $790.0 million of intangible assets are attributable to customer relationships, acquired software and trade name and will be amortized over a weighted average period of approximately 17 years. We recorded net deferred tax liabilities of $194.7 million related to the tax effect of our estimated fair value allocations. In the nine months ended September 30, 2021, we recorded adjustments to the preliminary opening balance sheet attributed to a decrease to accounts receivable and increases in identifiable intangible assets, deferred revenue and related deferred taxes resulting in a net decrease to goodwill of approximately $25.5 million.
NIC delivers user-friendly digital services that make it easier and more efficient for citizens and businesses to interact with government - providing valuable conveniences like applying for unemployment insurance, submitting business filings, renewing licenses, accessing information and making secure payments without visiting a government office. In addition, NIC has extensive expertise and scale in the government payments arena which will accelerate our strategic payments initiatives. Therefore, the goodwill of approximately $1.4 billion arising from this acquisition is primarily attributed to our ability to generate increased revenues, earnings and cash flow by expanding our addressable market and client base.
The following unaudited pro forma consolidated operating results information has been prepared as if the acquisition of NIC had occurred on January 1, 2020, after giving effect to certain adjustments, including amortization of intangibles, interest, transaction costs, and tax effects.

|  | Three Months Ended September 30, |  | Nine Months Ended September 30,
|  | 2021 |  | 2020 |  | 2021 |  | 2020
Revenues |  | $ | 459,873 |  |  | $ | 420,336 |  |  | $ | 1,322,055 |  |  | $ | 1,152,675 |
Net income |  | $ | 44,170 |  |  | $ | 50,257 |  |  | $ | 103,330 |  |  | $ | 130,555 |
Basic earnings per share |  | $ | 1.08 |  |  | $ | 1.25 |  |  | $ | 2.53 |  |  | $ | 3.26 |
Diluted earnings per share |  | $ | 1.04 |  |  | $ | 1.21 |  |  | $ | 2.45 |  |  | $ | 3.15 |

The pro forma information above does not include acquisitions that are not considered material to our results of operations. The pro forma information does not purport to represent what our results of operations actually would have been had such transaction occurred on the date specified or to project our results of operations for any future period.
On March 31, 2021, we acquired all the equity interest of Glass Arc, Inc. (dba ReadySub). ReadySub is a cloud-based platform that assists school districts with absence tracking, filling substitute teacher assignments, and automating essential payroll processes. The total cash price was approximately $6.2 million, net of cash acquired.
On March 31, 2021, we acquired substantially all assets of DataSpec, Inc. (DataSpec), a provider of a SaaS solution that allows for secure electronic claims submission to the federal Department of Veterans Affairs and reporting capabilities, in addition to scheduling, calendaring, and payments. The total cash purchase price was approximately $5.8 million.
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The operating results of Arx, DataSpec, ReadySub, and VendEngine are included with the operating results of the Enterprise Software segment since their date of acquisition. The impact of the Arx, DataSpec, ReadySub, and VendEngine acquisitions, individually and in the aggregate, on our operating results, assets and liabilities is not material. The operating results of NIC are disclosed separately as a reportable segment. Revenues from NIC included in Tyler's results of operations totaled approximately $249.7 million and net income was approximately $27.2 million from the date of acquisition through September 30, 2021. In 2021, we incurred fees of approximately $22.7 million for financial advisory, legal, accounting, due diligence, valuation and other various services necessary to complete these acquisitions. The Company also incurred $1.6 million of expense related to a separation agreement with NIC's former Chief Executive Officer. These costs were expensed in 2021 and are included in selling, general and administrative expenses in the accompanying condensed consolidated statement of income.
As of September 30, 2021, the purchase price allocations for Arx, DataSpec, NIC, ReadySub and VendEngine are not yet complete; therefore, the preliminary valuation estimates of fair value assumed at the acquisition date for intangible assets, receivables, deferred revenue and related deferred taxes are subject to change as valuations are finalized. Our balance sheet as of September 30, 2021, reflects the allocation of the purchase price to the net assets acquired based on their estimated fair value at the date of each acquisition. The fair value of the assets and liabilities acquired are based on valuations using Level III, unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.
(4) Shareholders’ Equity
The following table details activity in our common stock:

|  | Three Months Ended September 30, |  | Nine Months Ended September 30,
|  | 2021 |  | 2020 |  | 2021 |  | 2020
|  | Shares |  | Amount |  | Shares |  | Amount |  | Shares |  | Amount |  | Shares |  | Amount
Purchases of treasury shares |  | — |  |  | $ | — |  |  | — |  |  | $ | (2) |  |  | (32) |  |  | $ | (12,975) |  |  | (59) |  |  | $ | (15,484) |
Stock option exercises |  | 103 |  |  | 17,045 |  |  | 72 |  |  | 8,395 |  |  | 313 |  |  | 46,433 |  |  | 989 |  |  | 100,732 |
Employee stock plan purchases |  | 9 |  |  | 3,557 |  |  | 11 |  |  | 3,032 |  |  | 26 |  |  | 9,757 |  |  | 31 |  |  | 8,209 |
Restricted stock units vested, net of withheld shares upon award settlement |  | 5 |  |  | $ | (1,451) |  |  | 2 |  |  | $ | (316) |  |  | 104 |  |  | $ | (17,461) |  |  | 45 |  |  | $ | (7,208) |

As of September 30, 2021, we have authorization from our board of directors to repurchase up to 2.4 million additional shares of our common stock.
(5) Deferred Commissions
Sales commissions earned by our sales force are considered incremental and recoverable costs of obtaining a contract with a customer. Sales commissions for initial contracts are deferred and then amortized commensurate with the recognition of associated revenue over a period of benefit that we have determined to be three to seven years. Deferred commissions were $36.2 million and $32.3 million as of September 30, 2021, and December 31, 2020, respectively. Amortization expense related to deferred commissions was $3.5 million and $9.6 million for the three and nine months ended September 30, 2021, respectively, and $3.0 million and $8.9 million for the three and nine months ended September 30, 2020, respectively. There were no indicators of impairment in relation to the costs capitalized for the periods presented. Deferred commissions have been included with prepaid expenses for the current portion and non-current other assets for the long-term portion in the accompanying condensed consolidated balance sheets. Amortization expense related to deferred commissions is included in selling, general and administrative expenses in the accompanying condensed consolidated statements of income.
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(6) Other Assets
As of September 30, 2021, we have $114.3 million in investment grade corporate and municipal bonds with varying maturity dates through 2027. We intend to hold these bonds to maturity and have classified them as such. It is not more likely than not that we will be required to sell these bonds before recovery of their amortized costs. The portfolio consists of fixed income and high credit investments with fair values that approximate costs. The fair values of these securities are considered Level II as they are based on inputs from quoted prices in markets that are not active or other observable market data. These investments are presented at amortized cost and are included in short-term investments and non-current investments in the accompanying condensed consolidated balance sheets. As of September 30, 2021, we have an accrued interest receivable balance of approximately $689,000 which is included in accounts receivable, net. We do not measure an allowance for credit losses for accrued interest receivables. We record any losses within the maturity period of the investment and any write-offs to accrued interest receivables are recorded as a reduction to interest income in the period of the loss. During the three and nine months ended September 30, 2021, we have recorded no credit losses for accrued interest receivables. Interest income and amortization of discounts and premiums are included in other income, net in the accompanying condensed consolidated statements of income.
In 2020, we purchased $10 million in common stock representing an 18% interest in BFTR, LLC., a wholly owned subsidiary of Bison Capital Partners V L.P. BFTR, LLC, a privately held Australian company specializing in digitizing the spoken word in court and legal proceedings. The investment in common stock is accounted for under the equity method because we do not have the ability to exercise significant influence over the investee; and as the securities do not have readily determinable fair values, our investment is carried at cost less any impairment write-downs. Annually, our equity method investments are assessed for impairment. We do not reassess the fair value of equity method investments if there are no identified events or changes in circumstances that may have a significant adverse effect on the fair value of the investments. No events or changes have occurred during the period that require reassessment. This investment is included in other non-current assets in the accompanying condensed consolidated balance sheets.
(7) Debt
2021 Credit Agreement
In connection with the completion of the acquisition of NIC on the Closing Date the Company, as borrower, entered into a new $1.4 billion Credit Agreement (the “2021 Credit Agreement”) with the various lenders party thereto and Wells Fargo Bank, National Association, as Administrative Agent, Swingline Lender, and Issuing Lender. The 2021 Credit Agreement provides for (1) a senior unsecured revolving credit facility in an aggregate principal amount of up to $500 million, including sub-facilities for standby letters of credit and swingline loans (the “Revolving Credit Facility”), (2) an amortizing five-year term loan in the aggregate amount of $600 million (the “Term Loan A-1”), and (3) a non-amortizing three-year term loan in the aggregate amount of $300 million (the “Term Loan A-2”) and, together (the “Term Loans”). The 2021 Credit Agreement matures on April 20, 2026, and the loans may be prepaid at any time, without premium or penalty, subject to certain minimum amounts and payment of any LIBOR breakage costs. In addition to the required amortization payments on the Term Loan A-1 of 5% annually, certain mandatory quarterly prepayments of the Term Loans and the Revolving Credit Facility will be required (i) upon the issuance or incurrence of additional debt not otherwise permitted under the 2021 Credit Agreement and (ii) upon the occurrence of certain asset sales and insurance and condemnation recoveries, subject to certain thresholds, baskets, and reinvestment provisions as provided in the 2021 Credit Agreement.
Borrowings under the Revolving Credit Facility and the Term Loan A-1 bear interest, at the Company’s option, at a per annum rate of either (1) the Administrative Agent’s prime commercial lending rate (subject to certain higher rate determinations) (the “Base Rate”) plus a margin of 0.125% to 0.75% or (2) the one-, three-, six-, or, subject to approval by all lenders, twelve-month LIBOR rate plus a margin of 1.125% to 1.75%. The Term Loan A-2 bears interest, at the Company’s option, at a per annum rate of either (1) the Base Rate plus a margin of 0% to 0.5% or (2) the one-, three-, or six-, or, subject to approval by all lenders, twelve-month LIBOR rate plus a margin of 0.875% to 1.50%. The margin in each case is based upon the Company’s total net leverage ratio, as determined pursuant to the 2021 Credit Agreement. The 2021 Credit Agreement has customary benchmark replacement language with respect to the replacement of LIBOR once LIBOR becomes unavailable. In addition to paying interest on the outstanding principal of loans under the Revolving Credit Facility, the Company is required to pay a commitment fee on the average daily unused portion of the Revolving Credit Facility, initially 0.25% per annum, ranging from 0.15% to 0.30% based upon the Company’s total net leverage ratio.
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The net proceeds from the borrowings under the 2021 Credit Agreement were $1.1 billion, net of debt discounts of $7.2 million and debt issuance costs of $4.9 million and $6.4 million of commitment fees paid related to the terminated $1.6 billion unsecured bridge loan facility. On the Closing Date, the Company paid approximately $2.3 billion in cash for the purchase of NIC. The Term Loans of $900 million and a portion of the proceeds of the Revolving Credit Facility, in the amount of $250 million, together with cash available to the Company of $609 million and the net proceeds of its Convertible Senior Notes of $594 million, were used to complete the acquisition and pay fees and expenses in connection with the acquisition and the 2021 Credit Agreement. The remaining portion of the Revolving Credit Facility may be used for working capital requirements, acquisitions, and capital expenditures of the Company and its subsidiaries.
The 2021 Credit Agreement requires us to maintain certain financial ratios and other financial conditions and prohibits us from making certain investments, advances, cash dividends or loans, and limits incurrence of additional indebtedness and liens. As of September 30, 2021, we were in compliance with those covenants.
The following table summarizes the Company's total outstanding borrowings related to the 2021 Credit Agreement (in thousands):

|  | September 30, 2021 |  | Maturity Date
Revolving Credit Facility |  | $ | — |  |  | April 20, 2026
Term Loan A-1 |  | 592,500 |  |  | April 20, 2026
Term Loan A-2 |  | 250,000 |  |  | April 20, 2024
Total borrowings under the 2021 Credit Agreement |  | 842,500 |  |  |
Less: unamortized debt discount and debt issuance costs related to term loans |  | (6,965) |  |  |
Total borrowings, net |  | $ | 835,535 |  |  |
Less: current portion of debt |  | $ | (30,000) |  |  |
Carrying value as of September 30, 2021 |  | $ | 805,535 |  |  |

The carrying amount is the par value of the Revolving Credit Facility and Term Loans less the debt discount and debt issuance costs that are amortized to interest expense using the effective interest method over the terms of the Term Loans. Interest expense is included in the accompanying condensed consolidated statements of income. We believe the carrying amount of our debt approximates its fair value at September 30, 2021.
The effective interest rate for the borrowings under the 2021 Credit Agreement is 3.25% as of September 30, 2021. The following sets forth the interest expense recognized related to the borrowings under the 2021 Credit Agreement included in interest expense in the accompanying condensed consolidated statements of income (in thousands):

|  | Three Months Ended September 30, |  | Nine Months Ended September 30,
|  | 2021 |  | 2021
Contractual interest expense - Revolving Credit Facility |  | $ | (84) |  |  | $ | (618) |
Contractual interest expense - Term Loans |  | (3,492) |  |  | (6,153) |
Amortization of debt discount and debt issuance costs |  | (692) |  |  | (1,223) |
Total |  | $ | (4,268) |  |  | $ | (7,994) |

As of September 30, 2021, we had no outstanding borrowings under the 2021 Revolving Credit Facility, and our available borrowing capacity was $500.0 million. In addition, as of September 30, 2021, we had one outstanding standalone letter of credit totaling $2.0 million. The letter of credit, which guarantees our performance under a client contract, renews automatically annually unless canceled in writing, and expires in the third quarter of 2026.
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Terminated Debt Agreements
The 2021 Credit Agreement replaces and terminates the Company’s previous $400 million credit facility pursuant to the Credit Agreement dated as of September 30, 2019 (the “2019 Credit Agreement”). The Company’s previously announced commitment from Goldman Sachs Bank USA for a $1.6 billion 364-day senior unsecured bridge loan facility also terminated on the Closing Date. The following summarizes the interest expense and related amortization of debt issuance costs associated with the terminated debt agreements incurred through the Closing Date, included in interest expense in the accompanying condensed consolidated statements of income (in thousands).

|  | Three Months Ended September 30, |  | Nine Months Ended September 30,
|  | 2021 |  | 2021
Contractual interest expense - 2019 Credit Agreement |  | $ | — |  |  | $ | (313) |
Unsecured bridge loan facility commitment fee |  | — |  |  | (6,407) |
Amortization of debt issuance costs |  | — |  |  | (1,489) |
Total |  | $ | — |  |  | $ | (8,209) |

Convertible Senior Notes due 2026
On March 9, 2021, we issued 0.25% Convertible Senior Notes due 2026 in the aggregate principal amount of $600 million (“the Convertible Senior Notes” or “the Notes”). The Convertible Senior Notes were issued pursuant to, and are governed by, an indenture (the “Indenture”), dated as of March 9, 2021, with U.S. Bank National Association, as trustee. The net proceeds from the issuance of the Convertible Senior Notes were $591.4 million, net of initial purchasers’ discounts of $6.0 million and debt issuance costs of $2.6 million.
The Convertible Senior Notes are senior, unsecured obligations and are (i) equal in right of payment with our future senior, unsecured indebtedness; (ii) senior in right of payment to our future indebtedness that is expressly subordinated to the Notes; (iii) effectively subordinated to our future secured indebtedness, to the extent of the value of the collateral securing that indebtedness; and (iv) structurally subordinated to all future indebtedness and other liabilities, including trade payables, and (to the extent we are not a holder thereof) preferred equity, if any, of our subsidiaries.
The Convertible Senior Notes accrue interest at a rate of 0.25% per annum, payable semi-annually in arrears on March 15 and September 15 of each year, beginning on September 15, 2021. The Convertible Senior Notes mature on March 15, 2026, unless earlier repurchased, redeemed or converted.
Before September 15, 2025, holders of the Convertible Senior Notes have the right to convert their Convertible Senior Notes only upon the occurrence of certain events. Under the terms of indenture, the Convertible Senior Notes are convertible into common stock of Tyler Technologies, Inc. (referred to as “our common stock” herein) at the following times or circumstances:
•during any calendar quarter commencing after the calendar quarter ended June 30, 2021, if the last reported sale price per share of our common stock exceeds 130% of the conversion price for each of at least 20 trading days (whether or not consecutive) during the 30 consecutive trading days ending on, and including, the last trading day of the immediately preceding calendar quarter;
•during the five consecutive business days immediately after any five consecutive trading day period (such five consecutive trading day period, the “Measurement Period”) if the trading price per $1,000 principal amount of Convertible Senior Notes, as determined following a request by their holder in accordance with the procedures in the indenture, for each trading day of the Measurement Period was less than 98% of the product of the last reported sale price per share of our common stock on such trading day and the conversion rate on such trading day;
•upon the occurrence of certain corporate events or distributions on our common stock, including but not limited to a “Fundamental Change” (as defined in the indenture governing the Notes);
•upon the occurrence of specified corporate events; or
•on or after September 15, 2025, until the close of business on the second scheduled trading day immediately preceding the maturity date, March 15, 2026.
With certain exceptions, upon a change of control or other fundamental change (both as defined in the indenture governing the Convertible Senior Notes), the holders of the Convertible Senior Notes may require us to repurchase all or part of the principal
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amount of the Convertible Senior Notes at a repurchase price equal to 100% of the principal amount of the Convertible Senior Notes, plus any accrued and unpaid interest to, but excluding, the redemption date.
As of September 30, 2021, none of the conditions allowing holders of the Convertible Senior Notes to convert have been met.
From and including September 15, 2025, holders of the Convertible Senior Notes may convert their Convertible Senior Notes at any time at their election until the close of business on the second scheduled trading day immediately before the maturity date. We will settle any conversions of the Convertible Senior Notes either entirely in cash or in a combination of cash and shares of common stock, at our election. However, upon conversion of any Convertible Senior Notes, the conversion value, which will be determined over an “Observation Period” (as defined in the Indenture) consisting of 30 trading days, will be paid in cash up to at least the principal amount of the Notes being converted.
The initial conversion rate is 2.0266 shares of common stock per $1,000 principal amount of Convertible Senior Notes, which represents an initial conversion price of approximately $493.44 per share of common stock. The conversion rate and conversion price will be subject to adjustment upon the occurrence of certain events. In addition, if certain corporate events that constitute a “Make-Whole Fundamental Change” (as defined in the Indenture) occur, then the conversion rate will, in certain circumstances, be increased for a specified period of time.
The Convertible Senior Notes are redeemable, in whole or in part, at our option at any time, and from time to time, on or after March 15, 2024 and on or before the 30th scheduled trading day immediately before the maturity date, at a cash redemption price equal to the principal amount of the Notes to be redeemed, plus accrued and unpaid interest, if any, up to, but excluding, the redemption date, but only if the last reported sale price per share of our common stock exceeds 130% of the conversion price of the Notes on (i) each of at least 20 trading days, whether or not consecutive, during the 30 consecutive trading days ending on, and including, the trading day immediately before the date we send the related redemption notice; and (ii) the trading day immediately before the date we send such notice. In addition, calling any Note for redemption constitutes a Make-Whole Fundamental Change with respect to that Note, in which case the conversion rate applicable to the conversion of that Note will be increased in certain circumstances if it is converted after it is called for redemption.
The net carrying value of the Convertible Senior Notes, net of unamortized debt discount and unamortized debt issuance costs were as follows (in thousands):

|  | September 30, 2021
Convertible Senior Notes due 2026 |  | $ | 600,000 |
Less: unamortized debt discount and debt issuance costs |  | (7,665) |
Carrying value as of September 30, 2021 |  | $ | 592,335 |

The carrying amount is the par value of the Convertible Senior Notes less the debt discount and debt issuance costs that are amortized to interest expense using the effective interest method over the term of the Convertible Senior Notes. Interest expense is included in the accompanying condensed consolidated statements of income. The fair value of our convertible senior notes due 2026 is determined based on quoted market prices for a similar liability when traded as an asset in an active market, a Level 2 input. We believe the fair value amount of our Convertible Senior Notes is approximately $659.4 million at September 30, 2021.
As of September 30, 2021, the effective interest rate as for the Convertible Senior Notes is 1.19%. The following sets forth the interest expense recognized related to the Convertible Senior Notes (in thousands):

|  | Three Months Ended September 30, |  | Nine Months Ended September 30,
|  | 2021 |  | 2021
Contractual interest expense |  | $ | (379) |  |  | $ | (838) |
Amortization of debt discount and debt issuance costs |  | (430) |  |  | (953) |
Total |  | $ | (809) |  |  | $ | (1,791) |

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(8) Income Tax Provision
We had an effective income tax rate of 13.8% and 7.7% for the three and nine months ended September 30, 2021, respectively, compared to 21.3% and negative 11.1% for the three and nine months ended September 30, 2020, respectively. The decrease in the effective tax rate for the three months ended September 30, 2021, as compared to the same period in 2020, was principally driven by the increase in the excess tax benefits related to stock incentive awards. The increase in the effective tax rate for the nine months ended September 30, 2021, as compared to the same period in 2020, was principally driven by the decrease in the excess tax benefits related to stock incentive awards.
The effective income tax rates for the periods presented were different from the statutory United States federal income tax rate of 21% primarily due to excess tax benefits related to stock incentive awards, the tax benefit of research tax credits and the release of reserves for unrecognized income tax benefits resulting from expiration of the statutes of limitations for certain tax years, offset by state income taxes and non-deductible business expenses. The excess tax benefits related to stock incentive awards realized were $6.3 million and $21.5 million for the three and nine months ended September 30, 2021, respectively, as compared to $2.5 million and $48.0 million for the three and nine months ended September 30, 2020, respectively. Excluding the excess tax benefits, the effective tax rate was 26.1% and 26.3% for the three and nine months ended September 30, 2021, respectively, compared to 26.2% and 26.7% for the three and nine months ended September 30, 2020, respectively.
We made tax payments of $1.7 million and $2.6 million in the nine months ended September 30, 2021, and 2020, respectively.
(9) Earnings Per Share
The following table details the reconciliation of basic earnings per share to diluted earnings per share:

|  | Three Months Ended September 30, |  | Nine Months Ended September 30,
|  | 2021 |  | 2020 |  | 2021 |  | 2020
Numerator for basic and diluted earnings per share: |  |  |  |  |  |  |  |
Net income |  | $ | 44,170 |  |  | $ | 39,284 |  |  | $ | 106,676 |  |  | $ | 140,726 |
Denominator: |  |  |  |  |  |  |  |
Weighted-average basic common shares outstanding |  | 40,888 |  |  | 40,261 |  |  | 40,805 |  |  | 40,013 |
Assumed conversion of dilutive securities: |  |  |  |  |  |  |  |
Stock awards |  | 1,398 |  |  | 1,345 |  |  | 1,391 |  |  | 1,480 |
Convertible Senior Notes |  | — |  |  | — |  |  | — |  |  | — |
Denominator for diluted earnings per share - Adjusted weighted-average shares |  | 42,286 |  |  | 41,606 |  |  | 42,196 |  |  | 41,493 |
Earnings per common share: |  |  |  |  |  |  |  |
Basic |  | $ | 1.08 |  |  | $ | 0.98 |  |  | $ | 2.61 |  |  | $ | 3.52 |
Diluted |  | $ | 1.04 |  |  | $ | 0.94 |  |  | $ | 2.53 |  |  | $ | 3.39 |

For the three and nine months ended September 30, 2021 and 2020, stock awards, representing the right to purchase common stock of approximately 109,000 shares and 147,000 shares and 215,000 shares and 140,000 shares, respectively, were not included in the computation of diluted earnings per share because their inclusion would have had an antidilutive effect.
We have used the if-converted method for calculating any potential dilutive effect of the Convertible Senior Notes on our diluted net income per share. Under the if-converted method, the Notes are assumed to be converted at the beginning of the period and the resulting common shares are included in the denominator of the diluted earnings per share calculation for the entire period being presented and interest expense, net of tax, recorded in connection with the Convertible Senior Notes is added back to the numerator, only in the periods in which such effect is dilutive. The approximately 1.2 million resulting common shares related to the Notes are not included in the dilutive weighted-average common shares outstanding calculation for the three and nine months ended September 30, 2021, as their effect would be anti-dilutive given none of the conversion features have been triggered. See Note 7, Debt for discussion on the conversion features related to the Convertible Senior Notes.
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(10) Leases
We lease office facilities for use in our operations, as well as transportation and other equipment. Most of our leases are non-cancelable operating lease agreements with original maturities between one to ten years from the execution date. Some of these leases include options to extend for up to 10 years. We have no finance leases and no related party lease agreements as of September 30, 2021. Operating lease costs were approximately $5.3 million and $13.5 million for the three and nine months ended September 30, 2021, respectively, and $2.5 million and $7.6 million for the three and nine months ended September 30, 2020, respectively.
The components of operating lease expense were as follows:

Lease Costs |  | Financial Statement Classification |  | Three Months Ended September 30, | Nine Months Ended September 30,
|  |  |  | 2021 |  | 2020 | 2021 |  | 2020
Operating lease cost |  | Selling, general and administrative expenses |  | $ | 4,344 |  |  | $ | 1,595 |  | $ | 10,454 |  |  | $ | 4,867 |
Short-term lease cost |  | Selling, general and administrative expenses |  | 547 |  |  | 453 |  | 1,759 |  |  | 1,474 |
Variable lease cost |  | Selling, general and administrative expenses |  | 378 |  |  | 458 |  | 1,305 |  |  | 1,306 |
Net lease cost |  |  |  | $ | 5,269 |  |  | $ | 2,506 |  | $ | 13,518 |  |  | $ | 7,647 |

Right-of-use lease assets and lease liabilities for our operating leases were recorded in the condensed consolidated balance sheets as follows:

|  | September 30, 2021 |  | December 31, 2020
Assets: |  |  |  |
Operating lease right-of-use assets |  | $ | 40,449 |  |  | $ | 18,734 |
Liabilities: |  |  |  |
Operating leases, short-term |  | 10,125 |  |  | 5,904 |
Operating leases, long-term |  | 37,348 |  |  | 16,279 |
Total lease liabilities |  | $ | 47,473 |  |  | $ | 22,183 |

Supplemental information related to leases is as follows:

Other Information |  | Nine Months Ended September 30,
|  | 2021 |  | 2020
Cash flows: |  |  |  |
Cash amounts paid included in the measurement of lease liabilities: |  |  |  |
Operating cash outflows from operating leases |  | $ | 7,856 |  |  | $ | 5,665 |
Right-of-use assets obtained in exchange for lease obligations (non-cash): |  |  |  |
Operating leases |  | $ | 17,633 |  |  | $ | 562 |
Lease term and discount rate: |  |  |  |
Weighted average remaining lease term (years) |  | 6 |  | 4
Weighted average discount rate |  | 1.91 | % |  | 4.00 | %

19

As of September 30, 2021, maturities of lease liabilities were as follows:

Year ending December 31, |  | Amount
2021 (Remaining 2021) |  | $ | 3,408 |
2022 |  | 11,215 |
2023 |  | 8,500 |
2024 |  | 7,211 |
2025 |  | 5,230 |
Thereafter |  | 14,265 |
Total lease payments |  | 49,829 |
Less: Interest |  | (2,356) |
Present value of operating lease liabilities |  | $ | 47,473 |

Rental Income from third parties
We own office buildings in Bangor, Falmouth and Yarmouth, Maine; Lubbock and Plano, Texas; Troy, Michigan; Latham, New York; and Moraine, Ohio. We lease space in some of these buildings to third-party tenants. The property we lease to others under operating leases consists primarily of specific facilities where one tenant obtains substantially all of the economic benefit from the asset and has the right to direct the use of the asset. These non-cancelable leases expire between 2021 and 2025, and some have options to extend the lease for up to seven years. We determine if an arrangement is a lease at inception. None of our leases allow the lessee to purchase the leased asset.
Rental income from third-party tenants for the three and nine months ended September 30, 2021, totaled $301,000 and $891,000, respectively, and for the three and nine months ended September 30, 2020, totaled $284,000 and $850,000, respectively. Rental income is included in hardware and other revenue in the condensed consolidated statements of income. As of September 30, 2021, future minimum operating rental income based on contractual agreements is as follows:

Year ending December 31, |  | Amount
2021 (Remaining 2021) |  | $ | 358 |
2022 |  | 1,449 |
2023 |  | 1,479 |
2024 |  | 1,510 |
2025 |  | 965 |
Thereafter |  | — |
Total |  | $ | 5,761 |

As of September 30, 2021, we had no additional significant operating or finance leases that had not yet commenced.
(11) Share-Based Compensation
The following table summarizes share-based compensation expense related to share-based awards recorded in the condensed consolidated statements of income, pursuant to ASC 718, Stock Compensation:

|  | Three Months Ended September 30, |  | Nine Months Ended September 30,
|  | 2021 |  | 2020 |  | 2021 |  | 2020
Subscriptions, software services and maintenance |  | $ | 6,303 |  |  | $ | 4,555 |  |  | $ | 17,212 |  |  | $ | 13,176 |
Selling, general and administrative expenses |  | 23,158 |  |  | 13,869 |  |  | 63,148 |  |  | 40,936 |
Total share-based compensation expense |  | $ | 29,461 |  |  | $ | 18,424 |  |  | $ | 80,360 |  |  | $ | 54,112 |

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(12) Segment and Related Information
We provide integrated information management solutions and services for the public sector.
We provide our software systems and services and appraisal services through seven business units, which focus on the following products:
•financial management, education and planning, regulatory and maintenance software solutions;
•financial management, municipal courts, planning, regulatory and maintenance software solutions;
•courts and justice and public safety software solutions;
•data and insights solutions;
•platform technologies solutions including case management and business management processing;
•NIC digital government and payments solutions; and
•appraisal and tax software solutions, land and vital records management software solutions, and property appraisal services.
In accordance with ASC 280-10, Segment Reporting, we report our results in three segments. The financial management, education and planning, regulatory and maintenance software solutions unit; financial management, municipal courts, planning, regulatory and maintenance software solutions unit; courts and justice and public safety software solutions unit; data and insights solutions; and platform technologies solutions meet the criteria for aggregation and are presented in the Enterprise Software (“ES”) reportable segment. The ES segment provides public sector entities with software systems and services to meet their information technology and automation needs for mission-critical “back-office” functions such as: financial management and education, courts and justice, public safety, planning, regulatory and maintenance, data and insights, and platform technologies processes. The Appraisal and Tax (“A&T”) segment provides systems and software that automate the appraisal and assessment of real and personal property, land and vital records management as well as provides property appraisal outsourcing services for local governments and taxing authorities. Property appraisal outsourcing services include: the physical inspection of commercial and residential properties; data collection and processing; computer analysis for property valuation; preparation of tax rolls; community education; and arbitration between taxpayers and the assessing jurisdiction. On April 21, 2021, the Company acquired NIC resulting in a new reportable segment, as its operating results meet the criteria of a reportable segment. The operating results of NIC are included with the operating results of the NIC segment from the date of acquisition.
We evaluate performance based on several factors, of which the primary financial measure is business segment operating income. We define segment operating income for our business units as income before non-cash amortization of intangible assets associated with their acquisitions, interest expense and income taxes. Segment operating income includes intercompany transactions. The majority of intercompany transactions relate to contracts involving more than one unit and are valued based on the contractual arrangement. Corporate segment operating income primarily consists of compensation costs for the executive management team, certain shared services staff, and share-based compensation expense for the entire company. Corporate segment operating income also includes revenues and expenses related to a company-wide user conference.
As of January 1, 2021, certain administrative costs related to information technology, which were previously allocated and reported in the ES and A&T segments, were moved to the Corporate segment to reflect changes in the way in which management makes operating decisions, allocates resources, and manages the growth and profitability of the Company. Prior year amounts for all segments have been adjusted to reflect the segment change.

For the three months ended September 30, 2021 |  |  |  |  |  |  |  |  |  |
|  | Enterprise Software |  | Appraisal and Tax |  | NIC |  | Corporate |  | Totals
Revenues |  |  |  |  |  |  |  |  |  |
Software licenses and royalties |  | $ | 21,238 |  |  | $ | 1,435 |  |  | $ | — |  |  | $ | — |  |  | $ | 22,673 |
Subscriptions |  | 102,285 |  |  | 8,311 |  |  | 142,346 |  |  | — |  |  | 252,942 |
Software services |  | 41,985 |  |  | 4,603 |  |  | 8,036 |  |  | — |  |  | 54,624 |
Maintenance |  | 110,231 |  |  | 7,399 |  |  | 203 |  |  | — |  |  | 117,833 |
Appraisal services |  | — |  |  | 7,146 |  |  | — |  |  | — |  |  | 7,146 |
Hardware and other |  | 4,558 |  |  | 9 |  |  | — |  |  | 88 |  |  | 4,655 |
Intercompany |  | 5,123 |  |  | 20 |  |  | — |  |  | (5,143) |  |  | — |
Total revenues |  | $ | 285,420 |  |  | $ | 28,923 |  |  | $ | 150,585 |  |  | $ | (5,055) |  |  | $ | 459,873 |
Segment operating income |  | $ | 97,378 |  |  | $ | 6,928 |  |  | $ | 34,586 |  |  | $ | (55,629) |  |  | $ | 83,263 |

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For the three months ended September 30, 2020 |  |  |  |  |  |  |  |  |  |
|  | Enterprise Software |  | Appraisal and Tax |  | NIC |  | Corporate |  | Totals
Revenues |  |  |  |  |  |  |  |  |  |
Software licenses and royalties |  | $ | 17,798 |  |  | $ | 2,139 |  |  | $ | — |  |  | $ | — |  |  | $ | 19,937 |
Subscriptions |  | 82,972 |  |  | 6,318 |  |  | — |  |  | — |  |  | 89,290 |
Software services |  | 42,640 |  |  | 5,306 |  |  | — |  |  | — |  |  | 47,946 |
Maintenance |  | 108,270 |  |  | 9,709 |  |  | — |  |  | — |  |  | 117,979 |
Appraisal services |  | — |  |  | 5,394 |  |  | — |  |  | — |  |  | 5,394 |
Hardware and other |  | 5,131 |  |  | 69 |  |  | — |  |  | — |  |  | 5,200 |
Intercompany |  | 5,128 |  |  | 38 |  |  | — |  |  | (5,166) |  |  | — |
Total revenues |  | $ | 261,939 |  |  | $ | 28,973 |  |  | $ | — |  |  | $ | (5,166) |  |  | $ | 285,746 |
Segment operating income |  | $ | 92,964 |  |  | $ | 9,938 |  |  | $ | — |  |  | $ | (39,889) |  |  | $ | 63,013 |

For the nine months ended September 30, 2021 |  |  |  |  |  |  |  |  |  |
|  | Enterprise Software |  | Appraisal and Tax |  | NIC |  | Corporate |  | Totals
Revenues |  |  |  |  |  |  |  |  |  |
Software licenses and royalties |  | $ | 50,064 |  |  | $ | 5,146 |  |  | $ | — |  |  | $ | — |  |  | $ | 55,210 |
Subscriptions |  | 295,523 |  |  | 23,829 |  |  | 235,627 |  |  | — |  |  | 554,979 |
Software services |  | 127,517 |  |  | 14,405 |  |  | 13,679 |  |  | — |  |  | 155,601 |
Maintenance |  | 330,024 |  |  | 26,184 |  |  | 358 |  |  | — |  |  | 356,566 |
Appraisal services |  | — |  |  | 19,876 |  |  | — |  |  | — |  |  | 19,876 |
Hardware and other |  | 13,412 |  |  | 79 |  |  | — |  |  | 3,027 |  |  | 16,518 |
Intercompany |  | 15,989 |  |  | 51 |  |  | — |  |  | (16,040) |  |  | — |
Total revenues |  | $ | 832,529 |  |  | $ | 89,570 |  |  | $ | 249,664 |  |  | $ | (13,013) |  |  | $ | 1,158,750 |
Segment operating income |  | $ | 284,813 |  |  | $ | 24,876 |  |  | $ | 57,517 |  |  | $ | (170,825) |  |  | $ | 196,381 |

For the nine months ended September 30, 2020 |  |  |  |  |  |  |  |  |  |
|  | Enterprise Software |  | Appraisal and Tax |  | NIC |  | Corporate |  | Totals
Revenues |  |  |  |  |  |  |  |  |  |
Software licenses and royalties |  | $ | 48,432 |  |  | $ | 7,267 |  |  | $ | — |  |  | $ | — |  |  | $ | 55,699 |
Subscriptions |  | 238,744 |  |  | 17,907 |  |  | — |  |  | — |  |  | 256,651 |
Software services |  | 126,488 |  |  | 17,245 |  |  | — |  |  | — |  |  | 143,733 |
Maintenance |  | 320,447 |  |  | 28,657 |  |  | — |  |  | — |  |  | 349,104 |
Appraisal services |  | — |  |  | 15,853 |  |  | — |  |  | — |  |  | 15,853 |
Hardware and other |  | 12,222 |  |  | 114 |  |  | — |  |  | 2 |  |  | 12,338 |
Intercompany |  | 13,662 |  |  | 58 |  |  | — |  |  | (13,720) |  |  | — |
Total revenues |  | $ | 759,995 |  |  | $ | 87,101 |  |  | $ | — |  |  | $ | (13,718) |  |  | $ | 833,378 |
Segment operating income |  | $ | 248,711 |  |  | $ | 26,246 |  |  | $ | — |  |  | $ | (109,893) |  |  | $ | 165,064 |

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|  | Three Months Ended September 30, |  | Nine Months Ended September 30,
Reconciliation of reportable segment operating income to the Company's consolidated totals: |  | 2021 |  | 2020 |  | 2021 |  | 2020
Total segment operating income |  | $ | 83,263 |  |  | $ | 63,013 |  |  | $ | 196,381 |  |  | $ | 165,064 |
Amortization of acquired software |  | (12,896) |  |  | (7,965) |  |  | (32,683) |  |  | (23,998) |
Amortization of customer and trade name intangibles |  | (14,183) |  |  | (5,392) |  |  | (31,015) |  |  | (16,176) |
Interest expense |  | (5,396) |  |  | (254) |  |  | (18,311) |  |  | (757) |
Other income, net |  | 445 |  |  | 534 |  |  | 1,249 |  |  | 2,497 |
Income before income taxes |  | $ | 51,233 |  |  | $ | 49,936 |  |  | $ | 115,621 |  |  | $ | 126,630 |

(13) Disaggregation of Revenue
The tables below show disaggregation of revenue into categories that reflect how economic factors affect the nature, amount, timing, and uncertainty of revenue and cash flows.
Timing of Revenue Recognition
Timing of revenue recognition by revenue category during the period is as follows:

For the three months ended September 30, 2021 |  |  |  |  |  |
|  | Products and services transferred at a point in time |  | Products and services transferred over time |  | Total
Revenues |  |  |  |  |  |
Software licenses and royalties |  | $ | 19,170 |  |  | $ | 3,503 |  |  | $ | 22,673 |
Subscriptions |  | — |  |  | 252,942 |  |  | 252,942 |
Software services |  | — |  |  | 54,624 |  |  | 54,624 |
Maintenance |  | — |  |  | 117,833 |  |  | 117,833 |
Appraisal services |  | — |  |  | 7,146 |  |  | 7,146 |
Hardware and other |  | 4,655 |  |  | — |  |  | 4,655 |
Total |  | $ | 23,825 |  |  | $ | 436,048 |  |  | $ | 459,873 |

For the three months ended September 30, 2020 |  |  |  |  |  |
|  | Products and services transferred at a point in time |  | Products and services transferred over time |  | Total
Revenues |  |  |  |  |  |
Software licenses and royalties |  | $ | 16,777 |  |  | $ | 3,160 |  |  | $ | 19,937 |
Subscriptions |  | — |  |  | 89,290 |  |  | 89,290 |
Software services |  | — |  |  | 47,946 |  |  | 47,946 |
Maintenance |  | — |  |  | 117,979 |  |  | 117,979 |
Appraisal services |  | — |  |  | 5,394 |  |  | 5,394 |
Hardware and other |  | 5,200 |  |  | — |  |  | 5,200 |
Total |  | $ | 21,977 |  |  | $ | 263,769 |  |  | $ | 285,746 |

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For the nine months ended September 30, 2021 |  |  |  |  |  |
|  | Products and services transferred at a point in time |  | Products and services transferred over time |  | Total
Revenues |  |  |  |  |  |
Software licenses and royalties |  | $ | 45,983 |  |  | $ | 9,227 |  |  | $ | 55,210 |
Subscriptions |  | — |  |  | 554,979 |  |  | 554,979 |
Software services |  | — |  |  | 155,601 |  |  | 155,601 |
Maintenance |  | — |  |  | 356,566 |  |  | 356,566 |
Appraisal services |  | — |  |  | 19,876 |  |  | 19,876 |
Hardware and other |  | 16,518 |  |  | — |  |  | 16,518 |
Total |  | $ | 62,501 |  |  | $ | 1,096,249 |  |  | $ | 1,158,750 |

For the nine months ended September 30, 2020 |  |  |  |  |  |
|  | Products and services transferred at a point in time |  | Products and services transferred over time |  | Total
Revenues |  |  |  |  |  |
Software licenses and royalties |  | $ | 47,311 |  |  | $ | 8,388 |  |  | $ | 55,699 |
Subscriptions |  | — |  |  | 256,651 |  |  | 256,651 |
Software services |  | — |  |  | 143,733 |  |  | 143,733 |
Maintenance |  | — |  |  | 349,104 |  |  | 349,104 |
Appraisal services |  | — |  |  | 15,853 |  |  | 15,853 |
Hardware and other |  | 12,338 |  |  | — |  |  | 12,338 |
Total |  | $ | 59,649 |  |  | $ | 773,729 |  |  | $ | 833,378 |

Recurring Revenue
The majority of our revenue is comprised of revenues from maintenance and subscriptions, which we consider to be recurring revenue. Virtually all of our on-premises software clients contract with us for maintenance and support, which provides us with a significant source of recurring revenue. We generally provide maintenance and support for our on-premises clients under annual, or in some cases, multi-year contracts. The contract terms for subscription arrangements range from one to 10 years but are typically contracted for initial periods of three to five years, providing a significant source of recurring revenues on an annual basis. We consider all other revenue categories to be non-recurring revenues.
Recurring revenues and non-recurring revenues recognized during the period are as follows:

For the three months ended September 30, 2021 |  |  |  |  |  |  |  |  |  |
|  | Enterprise Software |  | Appraisal and Tax |  | NIC |  | Corporate |  | Totals
Recurring revenues |  | $ | 212,517 |  |  | $ | 15,709 |  |  | $ | 142,549 |  |  | $ | — |  |  | $ | 370,775 |
Non-recurring revenues |  | 67,780 |  |  | 13,194 |  |  | 8,036 |  |  | 88 |  |  | 89,098 |
Intercompany |  | 5,123 |  |  | 20 |  |  | — |  |  | (5,143) |  |  | — |
Total revenues |  | $ | 285,420 |  |  | $ | 28,923 |  |  | $ | 150,585 |  |  | $ | (5,055) |  |  | $ | 459,873 |

24

For the three months ended September 30, 2020 |  |  |  |  |  |  |  |  |  |
|  | Enterprise Software |  | Appraisal and Tax |  | NIC |  | Corporate |  | Totals
Recurring revenues |  | $ | 191,242 |  |  | $ | 16,026 |  |  | $ | — |  |  | $ | — |  |  | $ | 207,268 |
Non-recurring revenues |  | 65,569 |  |  | 12,909 |  |  | — |  |  | — |  |  | 78,478 |
Intercompany |  | 5,128 |  |  | 38 |  |  | — |  |  | (5,166) |  |  | — |
Total revenues |  | $ | 261,939 |  |  | $ | 28,973 |  |  | $ | — |  |  | $ | (5,166) |  |  | $ | 285,746 |

For the nine months ended September 30, 2021 |  |  |  |  |  |  |  |  |  |
|  | Enterprise Software |  | Appraisal and Tax |  | NIC |  | Corporate |  | Totals
Recurring revenues |  | $ | 625,548 |  |  | $ | 50,012 |  |  | $ | 235,985 |  |  | $ | — |  |  | $ | 911,545 |
Non-recurring revenues |  | 190,992 |  |  | 39,507 |  |  | 13,679 |  |  | 3,027 |  |  | 247,205 |
Intercompany |  | 15,989 |  |  | 51 |  |  | — |  |  | (16,040) |  |  | — |
Total revenues |  | $ | 832,529 |  |  | $ | 89,570 |  |  | $ | 249,664 |  |  | $ | (13,013) |  |  | $ | 1,158,750 |

For the nine months ended September 30, 2020 |  |  |  |  |  |  |  |  |  |
|  | Enterprise Software |  | Appraisal and Tax |  | NIC |  | Corporate |  | Totals
Recurring revenues |  | $ | 559,191 |  |  | $ | 46,564 |  |  | $ | — |  |  | $ | — |  |  | $ | 605,755 |
Non-recurring revenues |  | 187,142 |  |  | 40,479 |  |  | — |  |  | 2 |  |  | 227,623 |
Intercompany |  | 13,662 |  |  | 58 |  |  | — |  |  | (13,720) |  |  | — |
Total revenues |  | $ | 759,995 |  |  | $ | 87,101 |  |  | $ | — |  |  | $ | (13,718) |  |  | $ | 833,378 |

(14) Deferred Revenue and Performance Obligations
Total deferred revenue, including long-term, by segment is as follows:

|  | September 30, 2021 |  | December 31, 2020
Enterprise Software |  | $ | 452,435 |  |  | $ | 422,742 |
Appraisal and Tax |  | 31,300 |  |  | 36,945 |
NIC |  | 9,525 |  |  | — |
Corporate |  | 2,043 |  |  | 1,691 |
Totals |  | $ | 495,303 |  |  | $ | 461,378 |

Changes in total deferred revenue, including long-term, were as follows:

|  | Nine months ended September 30, 2021
Balance as of December 31, 2020 |  | $ | 461,378 |
Deferral of revenue |  | 868,125 |
Recognition of deferred revenue |  | (834,200) |
Balance as of September 30, 2021 |  | $ | 495,303 |

Transaction Price Allocated to the Remaining Performance Obligations
The aggregate amount of transaction price allocated to the remaining performance obligations represents contracted revenue that has not yet been recognized (“backlog”), which includes deferred revenue and amounts that will be invoiced and recognized as revenue in future periods. Backlog as of September 30, 2021, was $1.77 billion, of which we expect to recognize approximately 47% as revenue over the next 12 months and the remainder thereafter.
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(15) Commitments and Contingencies
Security Incident
As previously disclosed, we experienced a security incident in September 2020 (the “Incident”) involving ransomware disrupting access to some of our internal information technology (IT) systems and telephone systems. Although we believe we have contained and recovered from the Incident, and that we have taken and will continue to take appropriate remediation steps, we are subject to risk and uncertainties as a result of the Incident. We have completed our investigation and remediation efforts related to the Incident. For the nine months ended September 30, 2021, we have recorded $410,000 of expenses and approximately $195,000 of accrued insurance recoveries and received $755,000 of insurance recoveries. The recorded costs consist primarily of payments to third-party service providers and consultants, including legal fees, and enhancements to our cybersecurity measures. We maintain cybersecurity insurance coverage in an amount that we believe is adequate.
Litigation
Other than routine litigation incidental to our business, there are no material legal proceedings pending to which we are party or to which any of our properties are subject.
(16) Subsequent Events
There have been no material events or transactions that occurred subsequent to September 30, 2021.
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ITEM 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations
CAUTIONARY NOTE CONCERNING FORWARD-LOOKING STATEMENTS
This document contains “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934 that are not historical in nature and typically address future or anticipated events, trends, expectations or beliefs with respect to our financial condition, results of operations or business. Forward-looking statements often contain words such as “believes,” “expects,” “anticipates,” “foresees,” “forecasts,” “estimates,” “plans,” “intends,” “continues,” “may,” “will,” “should,” “projects,” “might,” “could” or other similar words or phrases. Similarly, statements that describe our business strategy, outlook, objectives, plans, intentions or goals also are forward-looking statements. We believe there is a reasonable basis for our forward-looking statements, but they are inherently subject to risks and uncertainties and actual results could differ materially from the expectations and beliefs reflected in the forward-looking statements. We presently consider the following to be among the important factors that could cause actual results to differ materially from our expectations and beliefs: (1) the effects of the COVID-19 pandemic, including its potential effects on the economic environment, our customers and our operations, as well as any changes to federal, state or local government laws, regulations or orders in connection with the pandemic; (2) changes in the budgets or regulatory environments of our clients, primarily local and state governments, that could negatively impact information technology spending; (3) disruption to our business and harm to our competitive position resulting from cyber-attacks and security vulnerabilities (4) our ability to protect client information from security breaches and provide uninterrupted operations of data centers; (5) our ability to achieve growth or operational synergies through the integration of acquired businesses, while avoiding unanticipated costs and disruptions to existing operations; (6) material portions of our business require the Internet infrastructure to be adequately maintained; (7) our ability to achieve our financial forecasts due to various factors, including project delays by our clients, reductions in transaction size, fewer transactions, delays in delivery of new products or releases or a decline in our renewal rates for service agreements; (8) general economic, political and market conditions; (9) technological and market risks associated with the development of new products or services or of new versions of existing or acquired products or services; (10) competition in the industry in which we conduct business and the impact of competition on pricing, client retention and pressure for new products or services; (11) the ability to attract and retain qualified personnel and dealing with the loss or retirement of key members of management or other key personnel; and (12) costs of compliance and any failure to comply with government and stock exchange regulations. A detailed discussion of these factors and other risks that affect our business are described in Item 1A, “Risk Factors”. We expressly disclaim any obligation to publicly update or revise our forward-looking statements.
GENERAL
We provide integrated information management solutions and services for the public sector. We develop and market a broad line of software products and services to address the IT needs of public sector entities. In addition, we provide professional IT services to our clients, including software and hardware installation, data conversion, training, and for certain clients, product modifications, along with continuing maintenance and support for clients using our systems. We also provide subscription-based services such as software as a service (“SaaS”) and electronic document filing solutions (“e-filing”), which simplify the filing and management of court related documents. Revenues for e-filing are derived from transaction fees and, in some cases, fixed fee arrangements. Also included in subscription-based services are other transaction-based fees primarily related to online payment services. We also provide property appraisal outsourcing services for taxing jurisdictions.
Our products generally automate nine major functional areas: (1) financial management and education, (2) courts and justice, (3) public safety, (4) property appraisal and tax, (5) planning, regulatory and maintenance, (6) land and vital records management, (7) data and insights, (8) platform technologies, and (9) NIC digital government and payments. We report our results in three segments. The Enterprise Software (“ES”) segment provides public sector entities with software systems and services to meet their information technology and automation needs for mission-critical “back-office” functions such as: financial management; courts and justice processes; public safety; planning, regulatory and maintenance; data analytics; and platform technologies. The Appraisal and Tax (“A&T”) segment provides systems and software that automate the appraisal and assessment of real and personal property, land and vital records management, as well as property appraisal outsourcing services for local governments and taxing authorities. Property appraisal outsourcing services include: the physical inspection of commercial and residential properties; data collection and processing; computer analysis for property valuation; preparation of tax rolls; community education; and arbitration between taxpayers and the assessing jurisdiction. On April 21, 2021, the Company acquired NIC resulting in a new reportable segment, as its operating results meet the criteria as a reportable segment. The operating results of NIC are included with the operating results of the NIC segment from the date of acquisition.
As of January 1, 2021, certain administrative costs related to information technology, which were previously reported in the ES and A&T segments, were moved to the Corporate segment to reflect changes in the way management makes operating decisions, allocates resources, and manages the growth and profitability of the Company. Prior year amounts for all segments have been adjusted to reflect the segment change.
27

Our total employee count increased to 6,718 at September 30, 2021, including 1,046 employees from 2021 acquisitions, from 5,511 at September 30, 2020.
On September 9, 2021, we acquired all the equity interest of Ultimate Information Systems, Inc. (dba Arx). Arx is a cloud-based platform which creates accessible technology to enable a modern-day police force that is fully transparent, accountable, and a trusted resource to the community it serves. The total purchase price, net of cash acquired, was approximately $12.8 million, of which $12.4 million was paid in cash and approximately $0.5 million was accrued for indemnity holdbacks, subject to certain post-closing adjustments.
On September 1, 2021, we acquired VendEngine, Inc (VendEngine) as contemplated by the Agreement and Plan of Merger dated June 3, 2021. As result of the merger, VendEngine became a direct subsidiary of the Company. VendEngine is a cloud-based software provider focused on financial technology for the corrections market. The total purchase price, net of cash acquired of $3.0 million, was approximately $83.1 million, consisting of $80.2 million paid in cash, and approximately $5.9 million related to indemnity holdbacks, subject to certain post-closing adjustments.
On April 21, 2021, we acquired NIC as contemplated by the Agreement and Plan of Merger dated February 9, 2021. As result of the merger, NIC became a direct subsidiary of the Company and NIC’s subsidiaries became indirect subsidiaries. NIC is a leading digital government solutions and payment company that primarily serves federal and state government agencies. The total purchase price, net of cash acquired of $331.8 million, was approximately $2.0 billion, consisting of cash paid of $2.3 billion and $1.9 million of purchase consideration related to the conversion of unvested restricted stock awards.
On March 31, 2021, we completed two acquisitions, Glass Arc, Inc. (dba ReadySub) and DataSpec, Inc. (DataSpec), for the total combined purchase price of $12.1 million.
For the three and nine months ended September 30, 2021, total revenues increased 60.9% and 39.0%, respectively, compared to the prior year periods. Excluding the impact of 2021 acquisitions, revenue increased 7.6% and 8.4% for the three and nine months ended September 30, 2021, respectively, compared to the prior year periods. Revenues from acquisitions completed in 2021 contributed 53.4% and 30.7% for the three and nine months ended September 30, 2021, respectively.
Subscriptions revenue grew 183.3% and 116.2% for the three and nine months ended September 30, 2021, respectively, compared to the prior year periods, primarily due the impact of the NIC acquisition, as well as an ongoing shift toward SaaS arrangements, along with growth in our transaction-based revenues such as e-filing and online payment services. Excluding the impact of 2021 acquisitions, subscriptions revenue increased 21.8% and 23.6% for the three and nine months ended September 30, 2021, respectively, compared to the prior year periods. Subscription revenues from acquisitions completed in 2021 contributed 161.4% and 92.7% for the three and nine months periods ended September 30, 2021, respectively.
Our backlog as of September 30, 2021, was $1.77 billion, a 14.3% increase from last year.
Impacts of the COVID-19 Pandemic
The pandemic continues to delay some government procurement processes and is expected to impact our ability to complete certain implementations, negatively impacting our revenue. Because an increasing portion of our revenues are recurring, the effect of COVID-19 on our results of operations may also not be fully reflected for some time. It could also negatively impact the timing of client payments to us. We continue to monitor these trends in order to respond to the ever-changing impact of COVID-19 on our clients and Tyler’s operations.
For the nine months ended September 30, 2021, excluding the impact of 2021 acquisitions, the impact of the COVID-19 pandemic resulted in lower revenues from software licenses and software services. Lower software licenses compared to prior periods are in part attributed to slower sales cycles as some government procurement processes have been delayed and contract signings have been pushed to future periods. Software services revenue have been affected by a decline in billable travel revenue, as most services are now being delivered virtually rather than on-site. Lower revenues compared to prior periods were partially offset by cost savings attributed to lower spend on travel, user conferences and trade show expenses, health claims and other employee-related expenses. As travel restrictions are relaxed, software services and appraisal services revenues are increasing. Also, we have adapted the way we do business by encouraging web and video conferencing, conducting virtual sales demonstrations and delivering professional services remotely, which result in increases in staff utilization rates and billable time.
For the three and nine months ended September 30, 2021, total revenues include subscriptions revenue and software services revenues of $43.3 million and $58.4 million,respectively, from NIC's TourHealth and pandemic unemployment services offerings. We currently expect these COVID-related revenues to decrease significantly in the fourth quarter of 2021 and wind down in the first half of 2022.
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Recurring revenues from subscriptions and maintenance comprised 79% of our total consolidated revenue for the nine months ended September 30, 2021, and include transaction-based revenue streams such as e-filing, online payments, and digital government services. On March 9, 2021, we issued 0.25% Convertible Senior Notes due 2026 (the “Convertible Senior Notes”) in the aggregate principal amount of $600 million. As of September 30, 2021, we had $348.4 million in cash and investments and $842.5 million of outstanding borrowings under our 2021 Credit Agreement executed on April 21, 2021. As of September 30, 2021, we had available borrowing capacity of $500 million under our 2021 Credit Agreement.
We have recorded no impairment to goodwill or other assets as of the balance sheet date. Due to significant uncertainty surrounding the pandemic and market conditions, management’s judgment regarding this could change in the future.
CRITICAL ACCOUNTING POLICIES AND ESTIMATES
The discussion and analysis of our financial condition and results of operations are based upon our condensed consolidated financial statements. These condensed consolidated financial statements have been prepared following the requirements of GAAP for the interim period and require us to make estimates and judgments that affect the reported amounts of assets, liabilities, revenues and expenses, and related disclosure of contingent assets and liabilities. On an ongoing basis, we evaluate our estimates, including those related to revenue recognition and amortization and potential impairment of intangible assets and goodwill and share-based compensation expense. As these are condensed financial statements, one should also read expanded information about our critical accounting policies and estimates provided in Item 7, “Management’s Discussion and Analysis of Financial Condition and Results of Operations”, included in our Form 10-K for the year ended December 31, 2020. Except for the accounting policies for convertible senior notes updated as a result of adopting Debt-Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging-Contracts in Entity’s Own Equity (Subtopic 815-40) (“ASU 2020-06”), there have been no material changes to our critical accounting policies and estimates from the information provided in our Form 10-K for the year ended December 31, 2020.
ANALYSIS OF RESULTS OF OPERATIONS

|  | Percent of Total Revenues
|  | Three Months Ended September 30, |  | Nine Months Ended September 30,
|  | 2021 |  | 2020 |  | 2021 |  | 2020
Revenues: |  |  |  |  |  |  |  |
Software licenses and royalties |  | 4.9 | % |  | 7.0 | % |  | 4.8 | % |  | 6.7 | %
Subscriptions |  | 55.0 |  |  | 31.2 |  |  | 47.9 |  |  | 30.8 |
Software services |  | 11.9 |  |  | 16.8 |  |  | 13.4 |  |  | 17.2 |
Maintenance |  | 25.6 |  |  | 41.3 |  |  | 30.8 |  |  | 41.9 |
Appraisal services |  | 1.6 |  |  | 1.9 |  |  | 1.7 |  |  | 1.9 |
Hardware and other |  | 1.0 |  |  | 1.8 |  |  | 1.4 |  |  | 1.5 |
Total revenues |  | 100.0 |  |  | 100.0 |  |  | 100.0 |  |  | 100.0 |
Cost of revenues: |  |  |  |  |  |  |  |
Software licenses, royalties and acquired software |  | 3.1 |  |  | 3.2 |  |  | 3.2 |  |  | 3.2 |
Subscriptions, software services and maintenance |  | 52.6 |  |  | 44.0 |  |  | 49.7 |  |  | 46.0 |
Appraisal services |  | 1.0 |  |  | 1.2 |  |  | 1.2 |  |  | 1.4 |
Hardware and other |  | 0.6 |  |  | 1.3 |  |  | 0.8 |  |  | 1.0 |
Selling, general and administrative expenses |  | 22.1 |  |  | 23.4 |  |  | 25.0 |  |  | 23.6 |
Research and development expense |  | 5.2 |  |  | 7.6 |  |  | 6.0 |  |  | 7.9 |
Amortization of customer and trade name intangibles |  | 3.1 |  |  | 1.9 |  |  | 2.7 |  |  | 1.9 |
Operating income |  | 12.2 |  |  | 17.4 |  |  | 11.5 |  |  | 15.0 |
Interest expense |  | (1.2) |  |  | (0.1) |  |  | (1.6) |  |  | (0.1) |
Other income, net |  | 0.1 |  |  | 0.2 |  |  | 0.1 |  |  | 0.3 |
Income before income taxes |  | 11.1 |  |  | 17.5 |  |  | 10.0 |  |  | 15.2 |
Income tax provision (benefit) |  | 1.5 |  |  | 3.7 |  |  | 0.8 |  |  | (1.7) |
Net income |  | 9.6 | % |  | 13.8 | % |  | 9.2 | % |  | 16.9 | %

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Revenues
Acquisitions
On April 21, 2021, we acquired NIC and as result of the merger, NIC became a direct subsidiary of the Company and NIC’s subsidiaries became indirect subsidiaries of the Company. NIC is a leading digital government solutions and payment company that serves federal, state and local government agencies.
The following table details revenue for NIC for the three and nine months ended September 30, 2021, which is included in our condensed consolidated statements of income from the date of acquisition. The results of NIC are included with the operating results of the NIC segment from the date of acquisition.

|  | Three Months Ended September 30, |  | Nine Months Ended September 30,
|  | 2021 |  | 2021
Revenues: |  |  |  |
Software licenses and royalties |  | $ | — |  |  | $ | — |
Subscriptions |  | 142,346 |  |  | 235,627 |
Software services |  | 8,035 |  |  | 13,679 |
Maintenance |  | 202 |  |  | 358 |
Appraisal services |  | — |  |  | — |
Hardware and other |  | — |  |  | — |
Total revenues |  | $ | 150,583 |  |  | $ | 249,664 |

On September 9, 2021, we acquired all of equity interest of Arx, a cloud-based platform which creates accessible technology to enable a modern-day police force that is fully transparent, accountable, and a trusted resource to the community it serves. On September 1, 2021, we acquired VendEngine, a cloud-based software provider focused on financial technology for the corrections market. On March 31, 2021, we completed two acquisitions, ReadySub and DataSpec.
The impact of the Arx, VendEngine, ReadySub and DataSpec acquisitions on our operating results is not considered material and is not included in the table above. The results of these acquisitions are included with the operating results of the ES segment from their dates of acquisition.
Software licenses and royalties
The following table sets forth a comparison of our software licenses and royalties revenue for the periods presented as of September 30:

|  | Three Months Ended |  | Change |  | Nine Months Ended |  | Change
|  | 2021 |  | 2020 |  | $ |  | % |  | 2021 |  | 2020 |  | $ |  | %
ES |  | $ | 21,238 |  |  | $ | 17,798 |  |  | $ | 3,440 |  |  | 19 | % |  | $ | 50,064 |  |  | $ | 48,432 |  |  | $ | 1,632 |  |  | 3 | %
A&T |  | 1,435 |  |  | 2,139 |  |  | (704) |  |  | (33) |  |  | 5,146 |  |  | 7,267 |  |  | (2,121) |  |  | (29) |
NIC |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Total software licenses and royalties revenue |  | $ | 22,673 |  |  | $ | 19,937 |  |  | $ | 2,736 |  |  | 14 | % |  | $ | 55,210 |  |  | $ | 55,699 |  |  | $ | (489) |  |  | (1) | %

Software licenses and royalties revenue increased 14% and decreased 1% for the three and nine months ended September 30, 2021, respectively, compared to the prior year periods. The increase in software licenses and royalties revenue for the three months ended September 30, 2021, is attributed to several large on-premise sales of our enterprise and courts and justice solutions partially offset by more clients choosing our SaaS offering, rather than purchasing the software under a traditional perpetual software arrangement. Slower sales cycles as government procurement processes were delayed and contract signings were pushed to future periods also negatively affected software licenses and royalties revenue. The decline in software licenses and royalties revenue for the nine months ended September 30, 2021, is primarily attributed to a shift in the mix of new software contracts from on-premise license sales to SaaS services compared to the prior year. Our total contract value mix for the nine months ended September 30, 2021, was approximately 34% perpetual software license arrangements and approximately 66% subscription-based arrangements, compared to total new contract value mix for the nine months ended September 30, 2020, of approximately 42% perpetual software license arrangements and approximately 58% subscription-based arrangements. Also contributing to the decline in software licenses and royalty revenue were slower sales cycles as government procurement processes were delayed and contract signings were pushed to future periods.
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Although the mix of new contracts between SaaS-based and perpetual license arrangements may vary from quarter to quarter and year to year, we expect our longer-term software license growth rate to slow as a growing number of clients choose our SaaS-based options, rather than purchasing the software under a traditional perpetual software license arrangement. SaaS-based arrangements generally do not result in license revenue in the initial year as compared to perpetual software license arrangements but generate higher overall revenue over the term of the contract.
Subscriptions
The following table sets forth a comparison of our subscriptions revenue for the periods presented as of September 30:

|  | Three Months Ended |  | Change |  | Nine Months Ended |  | Change
|  | 2021 |  | 2020 |  | $ |  | % |  | 2021 |  | 2020 |  | $ |  | %
ES |  | $ | 102,285 |  |  | $ | 82,972 |  |  | $ | 19,313 |  |  | 23 | % |  | $ | 295,523 |  |  | $ | 238,744 |  |  | $ | 56,779 |  |  | 24 | %
A&T |  | 8,311 |  |  | 6,318 |  |  | 1,993 |  |  | 32 |  |  | 23,829 |  |  | 17,907 |  |  | 5,922 |  |  | 33 |
NIC |  | 142,346 |  |  | — |  |  | 142,346 |  |  | 100 |  |  | 235,627 |  |  | — |  |  | 235,627 |  |  | 100 |
Total subscriptions revenue |  | $ | 252,942 |  |  | $ | 89,290 |  |  | $ | 163,652 |  |  | 183 | % |  | $ | 554,979 |  |  | $ | 256,651 |  |  | $ | 298,328 |  |  | 116 | %

Subscriptions revenue primarily consists of revenue derived from our SaaS arrangements. As part of our subscription-based services, we also provide e-filing arrangements that simplify the filing and management of court related documents for courts and law offices. E-filing revenue is derived from transaction fees and fixed fee arrangements. Other sources of subscription-based services are derived from transaction-based fees primarily related to online payments and digital government services.
Subscriptions revenue grew 183% and 116% for the three and nine months ending September 30, 2021, respectively, compared to the prior periods, primarily due to the inclusion of NIC’s revenues from the date of acquisition. Excluding the impact of revenue from 2021 acquisitions of $144.2 million and $237.8 million for the three and nine months ended September 30, 2021, respectively, subscriptions revenue increased 21.8% and 23.6% for the three and nine months ended September 30, 2021, respectively. New SaaS clients as well as existing clients who converted to our SaaS model provided the majority of the subscriptions revenue increase. In the three and nine months ending September 30, 2021, respectively, we added 144 and 398 new SaaS clients and 67 and 168 existing on-premises clients converted to our SaaS model. Since September 30, 2020, we have added 516 new SaaS clients while 218 existing on-premises clients converted to our SaaS offerings. Also excluding the impact of revenue from 2021 acquisitions, transaction-based fees contributed $5.6 million and $15.7 million to the increase in subscriptions revenue for the three and nine months ended September 30, 2021, respectively, due to the increased volumes of online payments from utility billings.
Software services
The following table sets forth a comparison of our software services revenue for the periods presented as of September 30:

|  | Three Months Ended |  | Change |  | Nine Months Ended |  | Change
|  | 2021 |  | 2020 |  | $ |  | % |  | 2021 |  | 2020 |  | $ |  | %
ES |  | $ | 41,985 |  |  | $ | 42,640 |  |  | $ | (655) |  |  | (2) | % |  | $ | 127,517 |  |  | $ | 126,488 |  |  | $ | 1,029 |  |  | 1 | %
A&T |  | 4,603 |  |  | 5,306 |  |  | (703) |  |  | (13) |  |  | 14,405 |  |  | 17,245 |  |  | (2,840) |  |  | (16) |
NIC |  | 8,036 |  |  | — |  |  | 8,036 |  |  | 100 |  |  | 13,679 |  |  | — |  |  | 13,679 |  |  | 100 |
Total software services revenue |  | $ | 54,624 |  |  | $ | 47,946 |  |  | $ | 6,678 |  |  | 14 | % |  | $ | 155,601 |  |  | $ | 143,733 |  |  | $ | 11,868 |  |  | 8 | %

Software services revenue primarily consists of professional services delivered in connection with implementing our software, converting client data, training client personnel, custom development activities and consulting. New clients who acquire our software generally also contract with us to provide the related software services. Existing clients also periodically purchase additional training, consulting and minor programming services. Software services revenue increased 14% and 8% for the three and nine months ended September 30, 2021, respectively, compared to the prior year periods. Excluding the impact of revenue from 2021 acquisitions of $8.1 million and $17.4 million for the three and nine months ended September 30, 2021, respectively, software services declined 2.9% and 3.8% for the three and nine months ended September 30, 2021, respectively. That decline for three and nine months ended September 30, 2021, in software services revenue is primarily attributed to a decline in billable travel revenue, as most services are now being delivered virtually rather than on-site.
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Maintenance
The following table sets forth a comparison of our maintenance revenue for the periods presented as of September 30:

|  | Three Months Ended |  | Change |  | Nine Months Ended |  | Change
|  | 2021 |  | 2020 |  | $ |  | % |  | 2021 |  | 2020 |  | $ |  | %
ES |  | $ | 110,231 |  |  | $ | 108,270 |  |  | $ | 1,961 |  |  | 2 | % |  | $ | 330,024 |  |  | $ | 320,447 |  |  | $ | 9,577 |  |  | 3 | %
A&T |  | 7,399 |  |  | 9,709 |  |  | (2,310) |  |  | (24) |  |  | 26,184 |  |  | 28,657 |  |  | (2,473) |  |  | (8.6) |
NIC |  | 203 |  |  | — |  |  | 203 |  |  | 100 |  |  | 358 |  |  | — |  |  | 358 |  |  | 100 |
Total maintenance revenue |  | $ | 117,833 |  |  | $ | 117,979 |  |  | $ | (146) |  |  | — | % |  | $ | 356,566 |  |  | $ | 349,104 |  |  | $ | 7,462 |  |  | 2 | %

We provide maintenance and support services for our software products and certain third-party software. Maintenance revenue was essentially flat and grew 2% for the three and nine months ended September 30, 2021, respectively, compared to the prior year periods. For the nine months ended September 30, 2021, maintenance revenue increased mainly due to the completion of the recognition of the majority of acquisition-related deferred maintenance revenue that was fair valued at rates below Tyler's average maintenance rate in prior periods. The remainder of the increase is attributed to annual maintenance rate increases and growth in our installed customer base from new software license sales, partially offset by attrition and clients converting from on-premises license arrangements to SaaS.
Appraisal services
The following table sets forth a comparison of our appraisal services revenue for the periods presented as of September 30:

|  | Three Months Ended |  | Change |  | Nine Months Ended |  | Change
|  | 2021 |  | 2020 |  | $ |  | % |  | 2021 |  | 2020 |  | $ |  | %
ES |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | — | % |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | — | %
A&T |  | 7,146 |  |  | 5,394 |  |  | 1,752 |  |  | 32 |  |  | 19,876 |  |  | 15,853 |  |  | 4,023 |  |  | 25 |
NIC |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Total appraisal services revenue |  | $ | 7,146 |  |  | $ | 5,394 |  |  | $ | 1,752 |  |  | 32 | % |  | $ | 19,876 |  |  | $ | 15,853 |  |  | $ | 4,023 |  |  | 25 | %

Appraisal services revenue for the three and nine months ended September 30, 2021, increased by 32% and 25%, respectively, compared to the prior year primarily due to relaxed travel restrictions allowing for the ramp-up of appraisal services for several new revaluation contracts which started in recent quarters. The appraisal services business is somewhat cyclical and driven in part by statutory revaluation cycles in various states.
Cost of Revenues and Gross Margins
The following table sets forth a comparison of the key components of our cost of revenues for the periods presented as of September 30:

|  | Three Months Ended |  | Change |  | Nine Months Ended |  | Change
|  | 2021 |  | 2020 |  | $ |  | % |  | 2021 |  | 2020 |  | $ |  | %
Software licenses and royalties |  | $ | 1,547 |  |  | $ | 1,177 |  |  | $ | 370 |  |  | 31 | % |  | $ | 4,151 |  |  | $ | 3,047 |  |  | $ | 1,104 |  |  | 36 | %
Acquired software |  | 12,896 |  |  | 7,965 |  |  | 4,931 |  |  | 62 |  |  | 32,683 |  |  | 23,998 |  |  | 8,685 |  |  | 36 |
Subscriptions, software services and maintenance |  | 241,944 |  |  | 125,881 |  |  | 116,063 |  |  | 92 |  |  | 576,035 |  |  | 381,947 |  |  | 194,088 |  |  | 51 |
Appraisal services |  | 4,506 |  |  | 3,434 |  |  | 1,072 |  |  | 31 |  |  | 13,552 |  |  | 11,795 |  |  | 1,757 |  |  | 15 |
Hardware and other |  | 2,764 |  |  | 3,780 |  |  | (1,016) |  |  | (27) |  |  | 9,845 |  |  | 8,748 |  |  | 1,097 |  |  | 13 |
Total cost of revenues |  | $ | 263,657 |  |  | $ | 142,237 |  |  | $ | 121,420 |  |  | 85 | % |  | $ | 636,266 |  |  | $ | 429,535 |  |  | $ | 206,731 |  |  | 48 | %

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The following table sets forth a comparison of gross margin percentage by revenue type for the periods presented as of September 30:

|  | Three Months Ended |  | Nine Months Ended
|  | 2021 |  | 2020 |  | Change |  | 2021 |  | 2020 |  | Change
Software licenses, royalties and acquired software |  | 36.3 | % |  | 54.1 | % |  | (17.8) | % |  | 33.3 | % |  | 51.4 | % |  | (18.1) | %
Subscriptions, software services and maintenance |  | 43.1 |  |  | 50.7 |  |  | (7.6) |  |  | 46.0 |  |  | 49.0 |  |  | (3.0) |
Appraisal services |  | 36.9 |  |  | 36.3 |  |  | 0.6 |  |  | 31.8 |  |  | 25.6 |  |  | 6.2 |
Hardware and other |  | 40.6 |  |  | 27.3 |  |  | 13.3 |  |  | 40.4 |  |  | 29.1 |  |  | 11.3 |
Overall gross margin |  | 42.7 | % |  | 50.2 | % |  | (7.5) | % |  | 45.1 | % |  | 48.5 | % |  | (3.4) | %

Software licenses, royalties and acquired software. Amortization expense for acquired software comprises the majority of costs of software licenses, royalties and acquired software. We do not have any direct costs associated with royalties. In the three and nine months ended September 30, 2021, our software licenses, royalties and acquired software gross margin decreased 17.8% and 18.1%, respectively, compared to the prior year periods due to lower revenue from software licenses and increased amortization expense related to acquired software from acquisitions completed in 2021.
Subscriptions, software services and maintenance. Cost of subscriptions, software services and maintenance primarily consists of personnel costs related to installation of our software, conversion of client data, training client personnel and support activities and various other services such as custom client development and ongoing operation of SaaS and e-filing arrangements. The subscriptions, software services and maintenance gross margin in the three and nine months ended September 30, 2021, decreased 7.6% and 3.0%, respectively, from the comparable prior year periods, primarily due to the inclusion of NIC’s revenues, which historically have lower margins than Tyler. Excluding the impact from 2021 acquisitions, gross margins are 47.9% and 49.0% for the three and nine months ended September 30, 2021, respectively. For the three months ending September 30, 2021, margins declined by 2.8%, due to higher employee head count. Excluding employees added through acquisitions, our implementation and support staff has grown by 75 employees since September 30, 2020. For the nine months ended September 30, 2021, margins remained constant due to improved utilization of our professional services staff resulting from the shift to virtual delivery of most implementation services. Costs related to maintenance and various other services such as SaaS and e-filing typically grow at a slower rate than related revenue due to leverage in the utilization of support and maintenance staff and economies of scale.
Appraisal services. Appraisal services revenue was approximately 1.6% and 1.7% of total revenue for the three and nine months ended September 30, 2021, respectively. The appraisal services gross margin for the three and nine months ended September 30, 2021, increased 0.6% and 6.2%, respectively, compared to the same periods in 2020. The increase in margin is primarily due to cost savings attributed to lower travel expenses associated with appraisal projects. The appraisal services business is somewhat cyclical and driven in part by statutory revaluation cycles in various states.
For the three and nine months ended September 30, 2021, our overall gross margin decreased 7.5% and 3.4%, respectively, compared to the prior year periods, primarily due to the inclusion of NIC’s revenues, which historically have lower margins than Tyler. Excluding the impact from 2021 acquisitions, overall gross margins were 48.3% and 48.5% for the three and nine months ended September 30, 2021, respectively. For the three months ended September 30, 2021, the decrease in gross margin compared to the prior year period is due to lower revenue from software licenses and increased amortization expense related to acquired software from recent acquisitions, partially offset by a reduction in software services revenue from reimbursable travel that has little to no margin, as well as improved utilization of our professional services staff resulting from the shift to virtual delivery of most implementation services. Costs related to maintenance and various other services such as SaaS and e-filing typically grow at a slower rate than related revenue due to leveraging utilization of support and maintenance staff and economies of scale.
Selling, General and Administrative Expenses
Selling, general and administrative (“SG&A”) expenses consist primarily of salaries, employee benefits, travel, share-based compensation expense, commissions and related overhead costs for administrative and sales and marketing employees, as well as professional fees, trade show activities, advertising costs and other marketing related costs.
33

The following table sets forth a comparison of our SG&A expenses for the periods presented as of September 30:

|  | Three Months Ended |  | Change |  | Nine Months Ended |  | Change
|  | 2021 |  | 2020 |  | $ |  | % |  | 2021 |  | 2020 |  | $ |  | %
Selling, general and administrative expenses |  | $ | 101,847 |  |  | $ | 66,819 |  |  | $ | 35,028 |  |  | 52 | % |  | $ | 289,543 |  |  | $ | 196,825 |  |  | $ | 92,718 |  |  | 47 | %

SG&A as a percentage of revenues was 22.1% and 25.0% for the three and nine months ended September 30, 2021, respectively, compared to 23.4% and 23.6% for the three and nine months ended September 30, 2020, respectively. Excluding the impact of SG&A expense from 2021 acquisitions of $17.2 million and $30.7 million, for the three and nine months ended September 30, 2021, respectively, SG&A increased 26.6% and 31.5% for the three and nine months ending September 30, 2021, respectively, compared to prior year periods. The increase in SG&A is attributed to acquisition costs related to recent acquisitions, higher stock compensation expense, increased staff levels and other administrative expenses compared to prior periods. For the three and nine months ended September 30, 2021, SG&A includes $2.9 million and $22.7 million, respectively, of transaction expenses related to acquisitions completed in 2021. For the nine months ended September 30, 2021, we also incurred $1.6 million of expense related to a separation agreement with NIC's former Chief Executive Officer. For the three and nine months ended September 30, 2021, stock compensation expense rose $9.3 million and $22.2 million, respectively compared to prior periods, primarily due to an increase in share-based awards issued in connection with our stock compensation plan coupled with the higher fair value of each share-based award due to the increase in our stock price. We have added 13 SG&A employees, mainly to our sales and finance teams, since September 30, 2020. For the nine months ended September 30, 2021, SG&A expense also includes $3.2 million related to an accrual for litigation. These increases in SG&A were partially offset by lower travel expenses associated with administrative, sales and marketing activities, including trade shows, as a result of COVID-19 travel restrictions.
Research and Development Expense
The following table sets forth a comparison of our research and development expense for the periods presented as of September 30:

|  | Three Months Ended |  | Change |  | Nine Months Ended |  | Change
|  | 2021 |  | 2020 |  | $ |  | % |  | 2021 |  | 2020 |  | $ |  | %
Research and development expense |  | $ | 24,002 |  |  | $ | 21,642 |  |  | $ | 2,360 |  |  | 11 | % |  | $ | 69,243 |  |  | $ | 65,952 |  |  | $ | 3,291 |  |  | 5 | %

Research and development ("R&D") expense consists mainly of costs associated with development of new products and technologies from which we do not currently generate significant revenue. R&D expense in the three and nine months ended September 30, 2021, increased 11% and 5%, respectively, compared to the prior periods. Excluding the impact of R&D expense from 2021 acquisitions of $557,000 and $938,000 for both the three and nine months ended September 30, 2021, respectively, R&D expense increased 8.3% and 3.6% for the three and nine months ending September 30, 2021, respectively, compared to prior year periods, mainly due to a number of new Tyler product development initiatives across our product suites offset by a shift of some development resources to certain projects which meet the criteria for capitalization.
Amortization of Other Intangibles
Acquisition intangibles are comprised of the excess of the purchase price over the fair value of net tangible assets acquired that are allocated to acquired software and customer and trade name intangibles. The remaining excess purchase price is allocated to goodwill that is not subject to amortization. Amortization expense related to acquired software is included with cost of revenues while amortization expense of customer and trade name intangibles is recorded as operating expense. For the three and nine months ended September 30, 2021, amortization expense increased compared to prior periods due to acquisitions completed in fiscal year 2021.
The following table sets forth a comparison of amortization of customer and trade name intangibles for the periods presented as of September 30:

|  | Three Months Ended |  | Change |  | Nine Months Ended |  | Change
|  | 2021 |  | 2020 |  | $ |  | % |  | 2021 |  | 2020 |  | $ |  | %
Amortization of other intangibles |  | $ | 14,183 |  |  | $ | 5,392 |  |  | $ | 8,791 |  |  | 163 | % |  | $ | 31,015 |  |  | $ | 16,176 |  |  | $ | 14,839 |  |  | 92 | %

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Interest Expense
The following table sets forth a comparison of our interest expense for the periods presented as of September 30:

|  | Three Months Ended |  | Change |  | Nine Months Ended |  | Change
|  | 2021 |  | 2020 |  | $ |  | % |  | 2021 |  | 2020 |  | $ |  | %
Interest expense |  | $ | (5,396) |  |  | $ | (254) |  |  | $ | (5,142) |  |  | NM |  | $ | (18,311) |  |  | $ | (757) |  |  | $ | (17,554) |  |  | NM

Interest expense is primarily comprised of interest expense and non-usage and other fees associated with our borrowings. The change in interest expense in the three and nine months ended September 30, 2021, compared to the prior periods is attributable to higher levels of borrowings related to the 2021 Credit Agreement and Convertible Senior Notes.
Other Income, Net
The following table sets forth a comparison of our other income, net, for the periods presented as of September 30:

|  | Three Months Ended |  | Change |  | Nine Months Ended |  | Change
|  | 2021 |  | 2020 |  | $ |  | % |  | 2021 |  | 2020 |  | $ |  | %
Other income, net |  | $ | 445 |  |  | $ | 534 |  |  | $ | (89) |  |  | (17) |  |  | $ | 1,249 |  |  | $ | 2,497 |  |  | $ | (1,248) |  |  | (50) | %

Other income, net, is primarily comprised of interest income from invested cash. The change in other income, net, in the three and nine months ended September 30, 2021, compared to the prior periods is attributed to lower levels of invested cash and lower interest rates.
Income Tax Provision
The following table sets forth a comparison of our income tax provision for the periods presented as of September 30:

|  | Three Months Ended |  | Change |  | Nine Months Ended |  | Change
|  | 2021 |  | 2020 |  | $ |  | % |  | 2021 |  | 2020 |  | $ |  | %
Income tax provision (benefit) |  | $ | 7,063 |  |  | $ | 10,652 |  |  | $ | (3,589) |  |  | (34) |  | $ | 8,945 |  |  | $ | (14,096) |  |  | $ | 23,041 |  |  | (163) |
Effective income tax rate |  | 13.8 | % |  | 21.3 | % |  |  |  |  |  | 7.7 | % |  | (11.1) | % |  |  |  |

The change in effective tax rate for the three and nine months ended September 30, 2021, as compared to the same periods in 2020, was principally driven by the change in the excess tax benefits related to stock incentive awards. The effective income tax rates for the three and nine months ended September 30, 2021 and 2020, were different from the statutory United States federal income tax rate of 21% due to excess tax benefits related to stock incentive awards, the tax benefit of research tax credits and the release of reserves for unrecognized income tax benefits resulting from expiration of the statutes of limitations for certain tax years, offset by state income taxes and non-deductible business expenses. The excess tax benefits related to stock incentive awards realized were $6.3 million and $21.5 million for the three and nine months ended September 30, 2021, respectively, compared to $2.5 million and $48.0 million for the three and nine months ended September 30, 2020, respectively. Excluding the excess tax benefits, the effective tax rate was 26.1% and 26.3% for the three and nine months ended September 30, 2021, respectively, compared to 26.2% and 26.7% for the three and nine months ended September 30, 2020, respectively.
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FINANCIAL CONDITION AND LIQUIDITY
As of September 30, 2021, we had cash and cash equivalents of $234.1 million compared to $603.6 million at December 31, 2020. We also had $114.3 million invested in investment grade corporate and municipal bonds as of September 30, 2021. These investments have varying maturity dates through 2027, and we intend to hold these investments until maturity. As of September 30, 2021, we believe our cash from operating activities, revolving credit facility, cash on hand and access to the capital markets provides us with sufficient flexibility to meet our long-term financial needs.
The following table sets forth a summary of cash flows for the nine months ended September 30:

|  | 2021 |  | 2020
Cash flows provided (used) by: |  |  |  |
Operating activities |  | $ | 256,743 |  |  | $ | 266,328 |
Investing activities |  | (2,084,788) |  |  | (68,163) |
Financing activities |  | 1,458,550 |  |  | 87,838 |
Net (decrease) increase in cash and cash equivalents |  | $ | (369,495) |  |  | $ | 286,003 |

Net cash provided by operating activities continues to be our primary source of funds to finance operating needs and capital expenditures. Other potential capital resources include cash on hand, public and private issuances of debt or equity securities, and bank borrowings. It is possible that our ability to access the capital and credit markets in the future may be limited by economic conditions or other factors.
For the nine months ended September 30, 2021, operating activities provided cash of $256.7 million. Operating activities that provided cash were primarily comprised of net income of $106.7 million, non-cash depreciation and amortization charges of $97.9 million, non-cash share-based compensation expense of $80.4 million and a non-cash decrease in operating lease right-of-use assets of $7.0 million. Working capital, excluding cash, increased approximately $35.2 million mainly due to timing of payments to and receipts from our government partners and end-user consumers, timing of prepaid expenses, and deferred taxes associated with stock option activity during the period. These increases were offset by the timing of tax payments and an increase in deferred revenue during the period. In general, changes in deferred revenue are cyclical and primarily driven by the timing of our maintenance renewal billings. Our renewal dates occur throughout the year, but our largest renewal billing cycles occur in the second and fourth quarters. In addition, subscription renewals are billed throughout the year.
Our days sales outstanding (“DSO”) was 105 days at September 30, 2021, compared to 121 days at December 31, 2020, and 114 days at September 30, 2020. The decrease in DSO compared to December 31, 2020, is primarily attributed to our maintenance billing cycle, which typically peaks at its highest level in June and second highest level in December of each year, followed by collections in the subsequent quarter. DSO is calculated based on quarter-end accounts receivable divided by the quotient of annualized quarterly revenues divided by 360 days. The decrease in DSO compared to September 30, 2020, is attributed to improved collection efforts.
Investing activities used cash of $2.1 billion in the nine months ending September 30, 2021. On March 31, 2021, we completed two acquisitions with the total purchase price of $12.1 million, net of cash acquired, including $12.0 million paid in cash. On April 21, 2021, we completed the acquisition of NIC for the total purchase price of $2.0 billion, net of cash acquired of $331.8 million, including cash paid of $2.3 billion and $1.9 million of purchase consideration related to the conversion of unvested restricted stock awards. On September 9, 2021, we acquired all of the equity interest of Arx for the total purchase price, net of cash acquired, of approximately $12.8 million, of which $12.4 million was paid in cash and approximately $0.5 million was accrued for indemnity holdbacks, subject to certain post-closing adjustments. On September 1, 2021, we acquired VendEngine for the total purchase price, net of cash acquired of $3.0 million, of approximately $83.1 million consisting of $80.2 million paid in cash and approximately $5.9 million related to indemnity holdbacks, subject to certain post-closing adjustments. Approximately $20.8 million was invested in property and equipment, including $8.6 million related to real estate. The remaining additions were for computer equipment and furniture and fixtures in support of internal growth, particularly with respect to data centers supporting growth in our cloud-based offerings. In addition, approximately $15.0 million of software development costs were capitalized.
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Financing activities provided cash of $1.5 billion in the nine months ended September 30, 2021, and were primarily comprised of proceeds from the issuance of the Convertible Senior Notes and the 2021 Credit Agreement. On March 9, 2021, we issued $600 million aggregate principal amount of Convertible Senior Notes. The net proceeds from the issuance of the Convertible Senior Notes were $591.4 million, net of initial purchasers’ discounts of $6.0 million and debt issuance costs of $2.6 million. On April 21, 2021, in connection with the completion of the NIC acquisition, the Company, as borrower, entered into a new 2021 Credit Agreement with various lenders consisting of an unsecured revolving credit facility of up to $500 million and aggregate unsecured term loans totaling $900 million. The net proceeds from the borrowings under the 2021 Credit Agreement were $1.1 billion, net of debt discounts of $7.2 million and debt issuance costs of $4.9 million and $6.4 million of commitment fees paid related to the terminated $1.6 billion unsecured bridge loan facility. During the nine months ended September 30, 2021, we repaid $250 million of the unsecured revolving credit facility and $57.5 million of the unsecured term loans. During the nine months ended September 30, 2021, we repurchased approximately 33,000 shares of our common stock for an aggregate purchase price of $13.0 million, with an average price per share of $398.02. The remainder of the financing activities were attributed to stock option exercises and employee stock purchase plan activity.
In February 2019, our board of directors authorized the repurchase of an additional 1.5 million shares of our common stock. The repurchase program, which was approved by our board of directors, was originally announced in October 2002 and was amended at various times from 2003 through 2019. As of September 30, 2021, we have authorization from our board of directors to repurchase up to 2.4 million additional shares of our common stock. Our share repurchase program allows us to repurchase shares at our discretion. Market conditions influence the timing of the buybacks and the number of shares repurchased, as well as the volume of employee stock option exercises. Share repurchases are generally funded using our existing cash balances and borrowings under our credit facility and may occur through open market purchases and transactions structured through investment banking institutions, privately negotiated transactions and/or other mechanisms. There is no expiration date specified for the authorization, and we intend to repurchase stock under the plan from time to time.
We made tax payments of $1.7 million and $2.6 million in the nine months ended September 30, 2021, and 2020, respectively.
See Note 7, Debt, to the Condensed Consolidated Financial Statements for discussions of the Convertible Senior Notes and the 2021 Credit Agreement.
From time to time we engage in discussions with potential acquisition candidates. In order to pursue such opportunities, which could require significant commitments of capital, we may be required to incur debt or to issue additional potentially dilutive securities in the future. No assurance can be given as to our future acquisition opportunities and how such opportunities will be financed.
We anticipate that 2021 capital spending will be between $47 million and $49 million, including approximately $21 million of capitalized software development. We expect the majority of the other capital spending will consist of computer equipment and software for infrastructure replacements and expansion. Capital spending is expected to be funded from existing cash balances and cash flows from operations.
We lease office facilities, as well as transportation and other equipment used in our operations under non-cancelable operating lease agreements expiring at various dates through 2025.
ITEM 3. Quantitative and Qualitative Disclosures About Market Risk
Market risk represents the risk of loss that may affect us due to adverse changes in financial market prices and interest rates.
As of September 30, 2021, we had $842.5 million principal outstanding borrowings under our 2021 Credit Agreement and available borrowing capacity under the 2021 Credit Agreement was $500.0 million.
Borrowings under the Revolving Credit Facility and the Term Loan A-1 will bear interest, at the Company’s option, at a per annum rate of either (1) the Administrative Agent’s prime commercial lending rate (subject to certain higher rate determinations) (the “Base Rate”) plus a margin of 0.125% to 0.75% or (2) the one-, three-, six-, or, subject to approval by all lenders, twelve-month LIBOR rate plus a margin of 1.125% to 1.75%. The Term Loan A-2 will bear interest, at the Company’s option, at a per annum rate of either (1) the Base Rate plus a margin of 0% to 0.5% or (2) the one-, three-, or six-, or, subject to approval by all lenders, twelve-month LIBOR rate plus a margin of 0.875% to 1.50%.
During the nine months ended September 30, 2021, our effective average interest rate for our borrowings was 3.25%. As of September 30, 2021, our interest rate was 1.51% for our outstanding borrowings. Based on the debt under the 2021 Credit Agreement, the aggregate principal outstanding balance as of September 30, 2021 is $842.5 million, and each quarter point change in interest rates would result in a $2.1 million change in annual interest expense.
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ITEM 4. Controls and Procedures
Evaluation of Disclosure Controls and Procedures
We maintain disclosure controls and procedures (as defined in Rule 13a-15(e) of the Securities Exchange Act) designed to provide reasonable assurance that the information required to be disclosed by us in the reports we file or submit under the Exchange Act is recorded, processed, summarized and reported within the time period specified in the SEC’s rules and forms. These include controls and procedures designed to ensure that this information is accumulated and communicated to our management, including our Chief Executive Officer and Chief Financial Officer, as appropriate to allow timely decisions regarding required disclosures. Management, with the participation of the Chief Executive Officer and Chief Financial Officer, evaluated the effectiveness of our disclosure controls and procedures as of the end of the period covered by this report. Based on this evaluation, the Chief Executive Officer and Chief Financial Officer have concluded that our disclosure controls and procedures were effective as of September 30, 2021.
Changes in Internal Control over Financial Reporting
There were no changes in our internal control over financial reporting (as defined in Rule 13a-15(f) of the Exchange Act) during the three months ended September 30, 2021, that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.
Part II. OTHER INFORMATION
ITEM 1. Legal Proceedings
Other than routine litigation incidental to our business, there are no material legal proceedings pending to which we are party or to which any of our properties are subject.
ITEM 1A. Risk Factors
In addition to the other information set forth in this report, one should carefully consider the discussion of various risks and uncertainties contained in Part I, “Item 1A. Risk Factors” in our 2020 Annual Report on Form 10-K. We believe those risk factors are the most relevant to our business and could cause our results to differ materially from the forward-looking statements made by us. Please note, however, that those are not the only risk factors facing us. Additional risks that we do not consider material, or of which we are not currently aware, may also have an adverse impact on us. Our business, financial condition and results of operations could be seriously harmed if any of these risks or uncertainties actually occurs or materializes. In that event, the market price for our common stock could decline, and our shareholders may lose all or part of their investment. During the three months ended September 30, 2021, except for the risk factors described below, there were no material changes in the information regarding risk factors contained in our Annual Report on Form 10-K for the year ended December 31, 2020.
Risks Related to Our Indebtedness
Servicing our indebtedness requires a significant amount of cash. We may not have sufficient cash flow from our business to pay our indebtedness, and we may not otherwise have the ability to raise the funds necessary to settle for cash conversions of the Convertible Senior Notes or to repurchase the Convertible Senior Notes upon a fundamental change, or to repay our indebtedness obligations under our New Credit Agreement (defined below), each of which could adversely affect our business and results of operations.
As of September 30, 2021, we had outstanding an aggregate principal amount of $600 million of our Convertible Senior Notes and $842.5 million under our 2021 Credit Agreement. On April 21, 2021, we entered into the 2021 Credit Agreement with significantly increased borrowing capacity of up to $1.4 billion and on the closing date of April 21, 2021, we borrowed initial loans in the aggregate principal amount of $1.15 billion. The 2021 Credit Agreement also has an option to increase the amount available up to an additional $435 million, subject to our leverage and other factors. The proceeds from the Convertible Senior Notes and loans under the 2021 Credit Agreement were used as sources of funding for the purchase of NIC. Our indebtedness may increase our vulnerability to any generally adverse economic and industry conditions, and we and our subsidiaries may, subject to the limitations in the terms of our existing and future indebtedness, incur additional debt, secure existing or future debt or recapitalize our debt. If we incur additional indebtedness, the risks related to our business would increase and our ability to service or repay our indebtedness may be adversely impacted.
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Pursuant to their terms, holders may convert their Convertible Senior Notes at their option prior to the scheduled maturities of their Convertible Senior Notes under certain circumstances. Upon conversion of the Convertible Senior Notes, unless we elect to deliver solely shares of our common stock to settle such conversion (other than paying cash in lieu of delivering any fractional share), we will be obligated to make cash payments. In addition, holders of our Convertible Senior Notes will have the right to require us to repurchase their Convertible Senior Notes upon the occurrence of a fundamental change (as defined in the Indenture, dated as of March 9, 2021, between the Company and U.S. Bank National Association, as trustee (the “Trustee”) (the “Indenture”), at a repurchase price equal to 100% of the principal amount of the Convertible Senior Notes to be repurchased, plus accrued and unpaid interest, if any. Although it is our intention, and we currently expect to have the ability, to settle the Convertible Senior Notes in cash, there is a risk that we may not have enough available cash or be able to obtain financing at the time we are required to make repurchases of Convertible Senior Notes surrendered or Convertible Senior Notes being converted. In addition, our ability to make payments may be limited by law, by regulatory authority, or by agreements governing our future indebtedness. Our failure to repurchase Convertible Senior Notes at a time when the repurchase is required by the Indenture or to pay any cash payable on future conversions of the Convertible Senior Notes as required by the Indenture would constitute a default under the Indenture. A default under the Indenture or the fundamental change itself could also lead to a default under agreements governing our other existing or future indebtedness. If the repayment of other indebtedness were to be accelerated after any applicable notice or grace periods, we may not have sufficient funds to repay the other indebtedness and repurchase the Convertible Senior Notes or make cash payments upon conversions thereof.
Our ability to make scheduled payments of the principal and interest on our indebtedness when due or to make payments upon conversion or repurchase demands with respect to our Convertible Senior Notes, or to refinance our indebtedness as we may need or desire, depends on our future performance, which is subject to economic, financial, competitive, and other factors beyond our control. Our business may not continue to generate cash flow from operations in the future sufficient to satisfy our obligations under our existing indebtedness, and any future indebtedness we may incur, and to make necessary capital expenditures. If we are unable to generate such cash flow, we may be required to adopt one or more alternatives, such as reducing or delaying investments or capital expenditures, selling assets, refinancing, or obtaining additional equity capital on terms that may be onerous or highly dilutive. Our ability to refinance existing or future indebtedness will depend on the capital markets and our financial condition at such time. We may not be able to engage in any of these activities or engage in these activities on desirable terms, which could result in a default on our existing or future indebtedness and have a material adverse effect on our business, results of operations, and financial condition.
Covenant restrictions under the Company’s indebtedness may limit our ability to operate our business and may adversely affect our financial condition, results of operations, and earnings per share.
The Indenture governing the Notes and the 2021 Credit Agreement do, and our future indebtedness agreements may, contain covenants that may restrict the Company’s ability to finance future operations or capital needs or to engage in other business activities. Subject to customary carve-outs, thresholds and baskets, the 2021 Credit Agreement (and the Indenture by means of a cross-default) restricts, absent consent of the agent and lenders under the 2021 Credit Agreement, our ability and the ability of our restricted subsidiaries to, among other things:
• Incur additional indebtedness,
• Permit liens on our assets,
• Make certain investments, acquisitions and dispositions,
• Make certain specified fundamental changes, and
• Make certain restricted payments.
In addition, the 2021 Credit Agreement (and the Indenture by means of a cross-default) contains other customary affirmative and negative covenants, and events of default. The 2021 Credit Agreement is unsecured but requires us to maintain certain financial ratios regarding our total leverage and interest coverage and other financial conditions in addition to the restrictions described above. Events beyond the Company’s control, including changes in general economic and business conditions, may result in a breach of any of these covenants and result in a default under the 2021 Credit Agreement that may, in turn, result in a default under the Indenture. If an event of default under the 2021 Credit Agreement occurs, the lenders could terminate all commitments to lend and elect to declare all amounts outstanding thereunder, together with accrued interest, to be immediately due and payable. If the Company was unable to pay such amounts, the lenders could proceed against the guarantees by our direct and indirect material domestic subsidiaries. Should the lenders proceed against the guarantees, we cannot give assurance that we would have sufficient assets to pay amounts due on the 2021 Credit Agreement and the Convertible Senior Notes.
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Variable rate indebtedness subjects the Company to interest rate risk, which could cause our debt service obligations to increase significantly.
Our borrowings under the 2021 Credit Agreement are, and are expected to continue to be, at variable rates of interest and expose the Company to interest rate risk. If interest rates increase, our debt service obligations on the variable rate indebtedness would increase even though the amount borrowed remained the same, and our net income would decrease. Revolving credit facility loans and Term A-1 Loans under the 2021 Credit Agreement bear interest at a per annum rate equal to, at our option, either (1) the administrative agent’s prime commercial lending rate (subject to certain higher rate determinations) (the “Base Rate”) plus a margin of 0.125% to 0.75% or (2) the one-, three-, six-, or, subject to approval by all lenders, twelve-month LIBOR rate plus a margin of 1.125% to 1.75%. Our Term A-2 Loans bear interest, our option, at a per annum rate of either (1) the Base Rate plus a margin of 0.00% to 0.50% or (2) the one-, three-, six-, or, subject to approval by all lenders, twelve-month LIBOR rate plus a margin of 0.875% to 1.50%. The margin in each case is based upon our total net leverage ratio, as determined pursuant to the 2021 Credit Agreement. Based on the debt under the 2021 Credit Agreement, the aggregate principal outstanding balance as of September 30, 2021 is $842.5 million, and each quarter point change in interest rates would result in a $2.1 million change in annual interest expense.
The conditional conversion feature of the Convertible Senior Notes, if triggered, may adversely affect our financial condition and results of operations.
In the event the conditional conversion feature of the notes is triggered, holders of our Convertible Senior Notes will be entitled to convert the Convertible Senior Notes at any time during specified periods at their option. If one or more holders elect to convert their Convertible Senior Notes, unless we elect to satisfy our conversion obligation by delivering solely shares of our common stock (other than paying cash in lieu of delivering any fractional share), we would be required to settle a portion or all of our conversion obligation through the payment of cash, which could adversely affect our liquidity. In addition, even if holders do not elect to convert their Convertible Senior Notes, we could be required under applicable accounting rules to reclassify all or a portion of the outstanding principal of the notes as a current rather than long-term liability, which would result in a material reduction of our net working capital.
Transactions relating to our Convertible Senior Notes may affect the value of our common stock.
Our Convertible Senior Notes may become convertible in the future at the option of their holders under certain circumstances. If holders of our Convertible Senior Notes elect to convert their notes, we may settle our conversion obligation by delivering to them a significant number of shares of our common stock, which would cause dilution to our existing shareholders.
ITEM 2. Unregistered Sales of Equity Securities and Use of Proceeds
None
ITEM 3. Defaults Upon Senior Securities
None
ITEM 4. Submission of Matters to a Vote of Security Holders
None
ITEM 5. Other Information
None
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ITEM 6. Exhibits

Exhibit 31.1 |  | Certification Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 |
Exhibit 31.2 |  | Certification Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 |
Exhibit 32.1 |  | Certifications Pursuant Certifications Pursuant to 18 U.S.C. Section 1350, as adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 |
Exhibit 4.1 |  | Credit Agreement dated April 21, 2021, among Tyler Technologies, Inc. and Wells Fargo Bank, N. A. as Administrative Agent and other lenders party hereto (filed as Exhibit 10.1 to our Form 8-K dated April 21, 2021, and incorporated by reference herein). |
Exhibit 101.INS |  | Inline XBRL Instance Document - the Instance Document does not appear in the interactive data file because its XBRL tags, including Cover Page XBRL tags, are embedded within the Inline XBRL Document. |
Exhibit 101.SCH |  | Inline XBRL Taxonomy Extension Schema Document. |
Exhibit 101.CAL |  | Inline XBRL Taxonomy Extension Calculation Linkbase Document. |
Exhibit 101.LAB |  | Inline XBRL Extension Labels Linkbase Document. |
Exhibit 101.DEF |  | Inline XBRL Taxonomy Extension Definition Linkbase Document. |
Exhibit 101.PRE |  | Inline XBRL Taxonomy Extension Presentation Linkbase Document. |
Exhibit 104 |  | Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101). |

SIGNATURES
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

| TYLER TECHNOLOGIES, INC.
By: | /s/ Brian K. Miller
| Brian K. Miller
| Executive Vice President and Chief Financial Officer
| (principal financial officer and an authorized signatory)

Date: November 1, 2021
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