Subsequent Events
The Company is required, under generally accepted accounting principles, to evaluate subsequent events through the filing of its consolidated financial statements for the quarter ended December 31, 2020 on Form 10-K. As a result, the Company will continue to evaluate the impact of any subsequent events on critical accounting assumptions and estimates made as of December 31, 2020 and will adjust amounts preliminarily reported, if necessary.

About Independent Bank Group
Independent Bank Group, through its wholly owned subsidiary, Independent Bank, provides a wide range of relationship-driven commercial banking products and services tailored to meet the needs of businesses, professionals and individuals. Independent Bank Group operates in four market regions located in the Dallas/Fort Worth, Austin and Houston areas in Texas and the Colorado Front Range area, including Denver, Colorado Springs and Fort Collins.

Conference Call
A conference call covering Independent Bank Group's fourth quarter earnings announcement will be held on Tuesday, February 2, 2021 at 8:30 a.m. (EDT) and can be accessed by the webcast link, https://webcasts.eqs.com/indepbankgroup20201026/en or by calling 1-877-407-0989 and by identifying the meeting number 13714597 or by identifying "Independent Bank Group Fourth Quarter 2020 Earnings Conference Call." The conference materials will also be available by accessing the Investor Relations page of our website, www.ifinancial.com. If you are unable to participate in the live event, a recording of the conference call will be accessible via the Investor Relations page of our website.

Forward-Looking Statements
From time to time the Company's comments and releases may contain "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995 that are subject to risks and uncertainties and are made pursuant to the safe harbor provisions of Section 27A of the Securities Act, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended, and other related federal security laws. Forward-looking statements include information about the Company's possible or assumed future results of operations, including its future revenues, income, expenses, provision for taxes, effective tax rate, earnings per share and cash flows, its future capital expenditures and dividends, its future financial condition and changes therein, including changes in the Company's loan portfolio and allowance for loan losses, the Company's future capital structure or changes therein, the plan and objectives of management for future operations, the Company's future or proposed acquisitions, the future or expected effect of acquisitions on the Company's operations, results of operations and financial condition, the Company's future economic performance and the statements of the assumptions underlying any such statement. Such statements are typically, but not exclusively, identified by the use in the statements of words or phrases such as "aim," "anticipate," "estimate," "expect," "goal," "guidance," "intend," "is anticipated," "is estimated," "is expected," "is intended," "objective," "plan," "projected," "projection," "will affect," "will be," "will continue," "will decrease," "will grow," "will impact," "will increase," "will incur," "will reduce," "will remain," "will result," "would be," variations of such words or phrases (including where the word "could," "may" or "would" is used rather than the word "will" in a phrase) and similar words and phrases indicating that the statement addresses some future result, occurrence, plan or objective. The forward-looking statements that the Company makes are based on its current expectations and assumptions regarding its business, the economy, and other future conditions. Because forward-looking statements relate to future results and occurrences, they are subject to inherent uncertainties, risks, and changes in circumstances that are difficult to predict. The Company's actual results may differ materially from those contemplated by the forward looking statements, which are neither statements of historical fact nor guarantees or assurances of future performance. Many possible events or factors could affect the Company's future financial results and performance and could cause those results or performance to differ materially from those expressed in the forward-looking statements. These possible events or factors include, but are not limited to: 1) the disruption to local, regional, national and global economic activity caused by infectious disease outbreaks, including the recent outbreak of coronavirus, or COVID-19, and the significant impact that such outbreak has had and may have on the Company's growth, operations, earnings and asset quality; 2) the Company's ability to sustain its current internal growth rate and total growth rate; 3) changes in geopolitical, business and economic events, occurrences and conditions, including changes in rates of inflation or deflation, nationally, regionally and in the Company's target markets, particularly in Texas and Colorado; 4) worsening business and economic conditions nationally, regionally and in the Company's target markets, particularly in Texas and Colorado, and the geographic areas in those states in which the Company operates; 5) the Company's dependence on its management team and its ability to attract, motivate and retain qualified personnel; 6) the concentration of the Company's business within its geographic areas of operation in Texas and Colorado; 7) changes in asset quality, including increases in default rates on loans and higher levels of nonperforming loans and loan charge-offs generally, and specifically resulting from the economic dislocation caused by the COVID-19 pandemic; 8) concentration of the loan portfolio of Independent Bank, before and after the completion of acquisitions of financial institutions, in commercial and residential real estate loans and changes in the prices, values and sales volumes of commercial and residential real estate; 9) the ability of Independent Bank to make loans with acceptable net interest margins and levels of risk of repayment and to otherwise invest in assets at acceptable yields and presenting acceptable investment risks; 10) inaccuracy of the assumptions and estimates that the managements of the Company and the financial institutions that the Company acquires make in establishing reserves for probable loan losses and other estimates generally, and specifically as a result of the effect of the COVID-19 pandemic; 11) lack of liquidity, including as a result of a reduction in the amount of sources of liquidity the Company currently has; 12) material increases or decreases in the amount of deposits held by Independent Bank or other financial institutions that the Company acquires and the cost of those deposits; 13) the Company's access to the debt and equity markets and the overall cost of funding its operations; 14) regulatory requirements to maintain minimum capital levels or maintenance of capital at levels sufficient to support the Company's anticipated growth; 15) changes in market interest rates that affect the pricing of the loans and deposits of each of Independent Bank and the financial institutions that the Company acquires and that affect the net interest income, other future cash flows, or the market value of the assets of each of Independent Bank and the financial institutions that the Company acquires, including investment securities; 16) fluctuations in the market value and liquidity of the securities the Company holds for sale, including as a result of changes in market interest rates; 17) effects of competition from a wide variety of local, regional, national and other providers of financial, investment and insurance services; 18) changes in economic and market conditions, including the economic dislocation resulting from the COVID-19 pandemic, that affect the amount and value of the assets of Independent Bank and of financial institutions that the Company acquires; 19) the institution and outcome of, and costs associated with, litigation and other legal proceedings against one of more of the Company, Independent Bank and financial institutions that the Company acquires or to which any of such entities is subject; 20) the occurrence of market conditions adversely affecting the financial industry generally, including the economic dislocation resulting from the COVID-19 pandemic; 21) the impact of recent and future legislative regulatory changes, including changes in banking, securities, and tax laws and regulations and their application by the Company's regulators, and changes in federal government policies, as well as regulatory requirements applicable to, and resulting from regulatory supervision of, the Company and Independent Bank as a financial institution with total assets greater than $10 billion; 22) changes in accounting policies, practices, principles and guidelines, as may be adopted by the bank regulatory agencies, the Financial Accounting Standards Board, the SEC and the Public Company Accounting Oversight Board, as the case may be; 23) governmental monetary and fiscal policies, including changes resulting from the implementation of the new Current Expected Credit Loss accounting standard; 24) changes in the scope and cost of FDIC insurance and other coverage; 25) the effects of war or other conflicts, acts of terrorism (including cyber attacks) or other catastrophic events, including natural disasters such as storms, droughts, tornadoes, hurricanes and flooding, that may affect general economic conditions; 26) the Company's actual cost savings resulting from previous or future acquisitions are less than expected, the Company is unable to realize those cost savings as soon as expected, or the Company incurs additional or unexpected costs; 27) the Company's revenues after previous or future acquisitions are less than expected; 28) the liquidity of, and changes in the amounts and sources of liquidity available to the Company, before and after the acquisition of any financial institutions that the Company acquires; 29) deposit attrition, operating costs, customer loss and business disruption before and after the Company completed acquisitions, including, without limitation, difficulties in maintaining relationships with employees, may be greater than the Company expected; 30) the effects of the combination of the operations of financial institutions that the Company has acquired in the recent past or may acquire in the future with the Company's operations and the operations of Independent Bank, the effects of the integration of such operations being unsuccessful, and the effects of such integration being more difficult, time consuming, or costly than expected or not yielding the cost savings the Company expects; 31) the impact of investments that the Company or Independent Bank may have made or may make and the changes in the value of those investments; 32) the quality of the assets of financial institutions and companies that the Company has acquired in the recent past or may acquire in the future being different than it determined or determine in its due diligence investigation in connection with the acquisition of such financial institutions and any inadequacy of loan loss reserves relating to, and exposure to unrecoverable losses on, loans acquired; 33) the Company's ability to continue to identify acquisition targets and successfully acquire desirable financial institutions to sustain its growth, to expand its presence in the Company's markets and to enter new markets; 34) general business and economic conditions in the Company's markets change or are less favorable than expected generally, and specifically as a result of the COVID-19 pandemic; 35) changes occur in business conditions and inflation generally, and specifically as a result of the COVID-19 pandemic; 36) an increase in the rate of personal or commercial customers' bankruptcies generally, and specifically as a result of the COVID-19 pandemic; 37) technology-related changes are harder to make or are more expensive than expected; 38) attacks on the security of, and breaches of, the Company's and Independent Bank's digital information systems, the costs the Company or Independent Bank incur to provide security against such attacks and any costs and liability the Company or Independent Bank incurs in connection with any breach of those systems; 39) the potential impact of technology and "FinTech" entities on the banking industry generally; 40) the other factors that are described or referenced in Part I, Item 1A, of the Company's Annual Report on Form 10-K filed with the SEC on March 2, 2020, as amended by the Company's Annual Report on Form 10-K/A filed with the SEC on March 6, 2020, the Company's Quarterly Reports on Form 10-Q, in each case under the caption "Risk Factors"; and 41) other economic, competitive, governmental, regulatory, technological and geopolitical factors affecting the Company's operations, pricing and services. The Company urges you to consider all of these risks, uncertainties and other factors carefully in evaluating all such forward-looking statements made by the Company. As a result of these and other matters, including changes in facts, assumptions not being realized or other factors, the actual results relating to the subject matter of any forward-looking statement may differ materially from the anticipated results expressed or implied in that forward-looking statement. Any forward-looking statement made in this prospectus or made by the Company in any report, filing, document or information incorporated by reference in this prospectus, speaks only as of the date on which it is made. The Company undertakes no obligation to update any such forward-looking statement, whether as a result of new information, future developments or otherwise, except as may be required by law. A forward-looking statement may include a statement of the assumptions or bases underlying the forward-looking statement. The Company believes that these assumptions or bases have been chosen in good faith and that they are reasonable. However, the Company cautions you that assumptions as to future occurrences or results almost always vary from actual future occurrences or results, and the differences between assumptions and actual occurrences and results can be material. Therefore, the Company cautions you not to place undue reliance on the forward-looking statements contained in this prospectus or incorporated by reference herein.

Non-GAAP Financial Measures
In addition to results presented in accordance with GAAP, this press release contains certain non-GAAP financial measures. These measures and ratios include "adjusted net income," "adjusted earnings," "tangible book value," "tangible book value per common share," "adjusted efficiency ratio," "tangible common equity to tangible assets," "adjusted net interest margin," "return on tangible equity," "adjusted return on average assets" and "adjusted return on average equity" and are supplemental measures that are not required by, or are not presented in accordance with, accounting principles generally accepted in the United States. We consider the use of select non-GAAP financial measures and ratios to be useful for financial operational decision making and useful in evaluating period-to-period comparisons. We believe that these non-GAAP financial measures provide meaningful supplemental information regarding our performance by excluding certain expenditures or assets that we believe are not indicative of our primary business operating results. We believe that management and investors benefit from referring to these non-GAAP financial measures in assessing our performance and when planning, forecasting, analyzing and comparing past, present and future periods.

We believe that these measures provide useful information to management and investors that is supplementary to our financial condition, results of operations and cash flows computed in accordance with GAAP; however we acknowledge that our financial measures have a number of limitations relative to GAAP financial measures. Certain non-GAAP financial measures exclude items of income, expenditures, expenses, assets, or liabilities, including provisions for loan losses and the effect of goodwill, other intangible assets and income from accretion on acquired loans arising from purchase accounting adjustments, that we believe cause certain aspects of our results of operations or financial condition to be not indicative of our primary operating results. All of these items significantly impact our financial statements. Additionally, the items that we exclude in our adjustments are not necessarily consistent with the items that our peers may exclude from their results of operations and key financial measures and therefore may limit the comparability of similarly named financial measures and ratios. We compensate for these limitations by providing the equivalent GAAP measures whenever we present the non-GAAP financial measures and by including a reconciliation of the impact of the components adjusted for in the non- GAAP financial measure so that both measures and the individual components may be considered when analyzing our performance.

A reconciliation of our non-GAAP financial measures to the comparable GAAP financial measures is included at the end of the financial statements tables.

CONTACTS:

Analysts/Investors:
Paul Langdale
Senior Vice President, Director of Corporate Development
(972) 562-9004
plangdale@ibtx.com

Michelle Hickox
Executive Vice President, Chief Financial Officer
(972) 562-9004
mhickox@ibtx.com

Media:
Schwinn Feng
Chief Marketing Officer
(469) 301-2706
schwinn.feng@ibtx.com

Independent Bank Group, Inc. and Subsidiaries
Consolidated Financial Data
Three Months Ended December 31, 2020, September 30, 2020, June 30, 2020, March 31, 2020 and December 31, 2019
(Dollars in thousands, except for share data)
(Unaudited)

Independent Bank Group, Inc. and Subsidiaries

Consolidated Financial Data

Three Months Ended December 31, 2020, September 30, 2020, June 30, 2020, March 31, 2020 and December 31, 2019

(Dollars in thousands, except for share data)

(Unaudited)

⁽¹⁾ Non-GAAP financial measure. See reconciliation.
⁽²⁾ Total number of shares includes participating shares (those with dividend rights).
⁽³⁾ Loans held for investment excludes mortgage warehouse purchase loans.
⁽⁴⁾ Loans held for investment includes SBA PPP loans of $804,397, $825,966 and $823,289 at December 31, 2020, September 30, 2020 and June 30, 2020, respectively.
⁽⁵⁾ Non-GAAP financial measure. Excludes average balance of goodwill and net other intangible assets.
⁽⁶⁾ Non-GAAP financial measure. Excludes unexpected income recognized on credit impaired acquired loans of $579, $1,294, $354, $982 and $791, respectively.
⁽⁷⁾ Efficiency ratio excludes amortization of other intangible assets. See reconciliation of non-GAAP financial measures.
⁽⁸⁾ Credit metrics -Nonperforming assets, which consist of nonperforming loans, OREO and other repossessed assets, totaled $52,005, $43,197, $28,403, $31,601 and $31,549, respectively. Nonperforming loans, which consists of nonaccrual loans, loans delinquent 90 days and still accruing interest, and troubled debt restructurings, and excludes loans acquired with deteriorated credit quality, totaled $51,416, $41,441, $26,601, $28,493 and $26,616, respectively.

Independent Bank Group, Inc. and Subsidiaries
Annual Selected Financial Information
Years Ended December 31, 2020 and 2019
(Unaudited)

⁽¹⁾ Total number of shares includes participating shares (those with dividend rights).

Independent Bank Group, Inc. and Subsidiaries
Consolidated Statements of Income
Three Months and Years Ended December 31, 2020 and 2019
(Dollars in thousands)
(Unaudited)

Independent Bank Group, Inc. and Subsidiaries
Consolidated Balance Sheets
As of December 31, 2020 and 2019
(Dollars in thousands)
(Unaudited)

Independent Bank Group, Inc. and Subsidiaries
Consolidated Average Balance Sheet Amounts, Interest Earned and Yield Analysis
Three Months Ended December 31, 2020 and 2019
(Dollars in thousands)
(Unaudited)

The analysis below shows average interest-earning assets and interest-bearing liabilities together with the average yield on the interest-earning assets and the average cost of the interest-bearing liabilities for the periods presented.

⁽¹⁾ Average loan balances include nonaccrual loans.
⁽²⁾ Net interest margins for the periods presented represent: (i) the difference between interest income on interest-earning assets and the interest expense on interest-bearing liabilities, divided by (ii) average interest-earning assets for the period.
⁽³⁾ A tax-equivalent adjustment has been computed using a federal income tax rate of 21%.
⁽⁴⁾ Yield and rates for the three month periods are annualized.

Independent Bank Group, Inc. and Subsidiaries
Consolidated Average Balance Sheet Amounts, Interest Earned and Yield Analysis
For The Years Ended December 31, 2020 and 2019
(Dollars in thousands)
(Unaudited)

The analysis below shows average interest-earning assets and interest-bearing liabilities together with the average yield on the interest-earning assets and the average cost of the interest-bearing liabilities for the periods presented.