Exhibit 99.1

INTERVEST BANCSHARES CORPORATION

Reports 2012 Fourth Quarter Earnings of $3.1 Million or $0.14 per share

and Full Year Earnings of $10.4 Million or $0.48 per share

Business Editors—New York – (Business Wire—January 16, 2013)

Intervest Bancshares Corporation (NASDAQ-GS:IBCA), parent company of Intervest National Bank, today reported that its net earnings for the fourth quarter of 2012 increased to $3.1 million, or $0.14 per common share, from $2.7 million, or $0.13 per share, for the fourth quarter of 2011, and net earnings for the full year 2012 increased to $10.4 million, or $0.48 per share, from $9.5 million, or $0.45 per share, for 2011.

Key Points Follow:

Net earnings for Q4-12 increased by $0.4 million from Q4-11 due to the following: a $1.5 million increase in noninterest income (due to a $1.9 million increase in loan prepayment income partially offset by a $0.4 million security impairment charge); a $0.3 million decrease in the provision for loan and real estate losses; and a $0.3 million decrease in real estate expenses associated with REO. The sum of these items was partially offset by a $0.9 million decrease in net interest and dividend income (as detailed below), a $0.4 million increase in operating expenses (primarily due to a $0.3 million aggregate increase in salaries, benefits and stock compensation expense including the impact of several new officer positions filled during 2012) and a $0.3 million increase in income tax expense (due to higher pre-tax income).

Net interest and dividend income for Q4-12 decreased due to a smaller balance sheet. In Q4-12, average interest-earning assets decreased by $339 million from Q4-11, reflecting decreases of $79 million in loans and $260 million in total securities and overnight investments. At the same time, average deposits and borrowed funds decreased by $272 million and $15 million, respectively, while stockholders’ equity increased by $13 million. The net interest margin benefited from a 31 basis point improvement in the interest rate spread, partially offset by a $52 million decrease in net average interest-earning assets (due to a higher level of cash on hand). The spread increased due to a steady reduction in rates paid on deposits and run off of higher-cost CDs and borrowings, largely offset by payoffs of higher yielding loans and calls of security investments, coupled with the re-investment of a large portion of these cash inflows into new loans and securities at lower market interest rates. Overall, the average cost of funds decreased by 40 basis points to 2.22% in Q4-12, from 2.62% in Q4-11, while the average yield on earning assets decreased at a slower pace or by 9 basis points to 4.54% in Q4-12, from 4.63% in Q4-11.

Net earnings for 2012 increased by $0.9 million over 2011 due to a $5.0 million decrease in the provision for loan losses (primarily due to fewer loans outstanding and fewer credit rating downgrades) and a $1.8 million increase in noninterest income (primarily due to a $2.6 million increase in loan prepayment income partially offset by a $0.4 million increase in security impairment charges). The sum of these items was partially offset by: a $3.1 million decrease in net interest and dividend income (due to a smaller balance sheet); a $0.7 million increase in the provision for real estate losses (due to lower estimated values on REO); a $0.5 million increase in real estate expenses associated with REO; a $0.8 million increase in operating expenses (primarily due to a $1.4 million aggregate increase in salaries, benefits and stock compensation expense including the impact of increased officers during 2012, partially offset by a $0.7 million decrease in FDIC insurance expense); and a $0.8 million increase in income tax expense (due to higher pre-tax income).

Total assets at December 31, 2012 decreased to $1.67 billion from $1.97 billion at December 31, 2011, primarily reflecting a $257 million decrease in security investments and a $56 million decrease in loans, partially offset by a $31 million increase in cash and short-term investments.

Securities held to maturity decreased to $444 million at December 31, 2012 from $700 million at December 31, 2011, reflecting calls of securities exceeding new purchases. The bulk of the resulting proceeds were used to fund planned deposit outflow and repayments of borrowings and a portion was being held temporarily in cash and short-term investments. At December 31, 2012, the securities portfolio, which represented 27% of total assets and was comprised almost entirely of U.S. government agency debt ($355 million) and residential mortgage-backed pass through securities ($84 million), had a weighted-average expected yield, remaining life and remaining contractual maturity of 1.05%, 2.0 years and 7.1 years, respectively.

Loans totaled $1.11 billion at December 31, 2012, compared to $1.16 billion at December 31, 2011. The decrease reflected $249 million of payoffs, $42 million of amortization, $2.3 million of net chargeoffs and $4.7 million of transfers to REO, mostly offset by $242 million of new loans. Loans paid off had a weighted-average yield of 6.15%. New loans, nearly all with fixed interest rates, had a weighted-average yield, term and loan-to-value ratio of 4.87%, 5.8 years and 56%, respectively.

Nonaccrual loans and REO aggregated to $62 million, or 3.7% of total assets, at December 31, 2012, compared to $86 million, or 4.3%, at December 31, 2011. Nonaccrual loans totaled $46 million at December 31, 2012, down from $57 million at December 31, 2011. Nonaccrual loans included $36 million (10 loans) and $46 million (12 loans) of TDRs that were current at each date, respectively. All the TDRs classified as nonaccrual have performed as agreed under their renegotiated terms and interest income is being recorded on a cash basis. Based on annual updated appraisals received on the underlying collateral properties, a portion of five TDRs (or $2.0 million of aggregate principal) was charged off for financial statement purposes during 2012. The borrowers remain obligated to pay all contractual principal due on the TDRs.

The allowance for loan losses at December 31, 2012 was $28.1 million, representing 2.54% of total net loans, compared to $30.4 million, or 2.61%, at December 31, 2011. The allowance included specific reserves for impaired loans (comprised of all nonaccrual loans as well as accruing TDRs) at each date totaling $6 million and $8 million, respectively.

At December 31, 2012, the Company had a deferred tax asset totaling $29 million, which included remaining unused NOL and AMT credit carryforwards totaling $17 million for Federal tax purposes and $47 million for State and Local tax purposes. These carryforwards are available to reduce taxes payable on the Company’s future taxable income.

Deposits at December 31, 2012 decreased to $1.36 billion from $1.66 billion at December 31, 2011, primarily reflecting a $262 million decrease in CD accounts, of which $50 million were brokered. At December 31, 2012, there were $78 million of brokered CDs outstanding with a rate of 4.91%, of which $38 million mature within one year.

Borrowed funds and related interest payable at December 31, 2012 decreased to $62.9 million, from $78.6 million at December 31, 2011, due to the repayment of $17.5 million of FHLB borrowings, partially offset by a $1.9 million increase in accrued interest payable on trust preferred securities (TRUPs). Stockholders’ equity increased to $211 million at December 31, 2012 from $198 million at December 31, 2011, primarily due to $12.2 million of net earnings before preferred dividend requirements.

Since February 2010, as required by its regulator and as permitted by the underlying documents, the Company has suspended the payment of interest on $55 million of its debt in the form of TRUPs and the declaration and payment of dividends on $25 million of its preferred stock held by the U.S. Treasury (TARP). Late last year, the Treasury announced that it will continue to conduct periodic, individual auctions of TARP securities, including those of 53 named institutions, one of which was the Company. Although the precise timing of any auction is not known, the Company and its subsidiary bank have applied for the necessary approvals from their respective regulators to permit the Company to bid for the preferred stock in any such auction. There is no assurance that such approvals will be granted.

Intervest Bancshares Corporation (IBC) is a bank holding company. Its operating subsidiary is Intervest National Bank (INB), a nationally chartered commercial bank that has its headquarters and full-service banking office at One Rockefeller Plaza, in New York City, and a total of six full-service banking offices in Clearwater and Gulfport, Florida. IBC’s Common Stock is listed on the NASDAQ Global Select Market: Trading Symbol IBCA. This release may contain forward-looking information. Words such as “may,” “will,” “could,” “should,” “would,” “believe,” “anticipate,” “estimate,” “expect,” “intend,” “plan,” “project,” “assume,” “indicate,” “continue,” “target,” “goal,” and similar words or expressions of the future are intended to identify forward-looking statements. Except for historical information, the matters discussed herein are subject to certain risks and uncertainties that may adversely affect our business, financial condition and results of operations. The following factors, among others, could cause actual results to differ materially from those set forth in forward looking statements: the regulatory agreements to which IBC and INB are currently subject to and any operating restrictions arising therefrom including availability of regulatory approvals or waivers; changes in economic conditions and real estate values both nationally and in our market areas; changes in our borrowing facilities, volume of loan originations and deposit flows; changes in the levels of our non-interest income and provisions for loan and real estate losses; changes in the composition and credit quality of our loan portfolio; legislative or regulatory changes, including increased expenses arising therefrom; changes in interest rates which may reduce our net interest margin and net interest income; increases in competition; technological changes which we may not be able to implement; changes in accounting or regulatory principles, policies or guidelines; changes in tax laws and our ability to utilize our deferred tax asset, including NOL and AMT carryforwards; and our ability to attract and retain key members of management. Reference is made to IBC’s filings with the SEC for further discussion of risks and uncertainties regarding our business. We assume no obligation to update any forward looking statements. Historical results are not necessarily indicative of our future prospects.

Contact: Lowell S. Dansker, Chairman; Phone 212-218-2800 Fax 212-218-2808.

Selected Consolidated Financial Information Follows.

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INTERVEST BANCSHARES CORPORATION

Selected Consolidated Financial Information

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INTERVEST BANCSHARES CORPORATION

Consolidated Financial Highlights

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