Exhibit 99.1

INTERVEST BANCSHARES CORPORATION

Reports 2013 Second Quarter Earnings of $3.2 Million or $0.14 per share

Business Editors - New York – (Business Wire – July 17, 2013)

Intervest Bancshares Corporation (NASDAQ-GS: IBCA), parent company of Intervest National Bank (INB), announced that its net earnings for the second quarter of 2013 (Q2-13) increased 39% to $3.2 million, or $0.14 per share, from $2.3 million, or $0.11 per share, for the second quarter of 2012 (Q2-12). For the first half of 2013 (6mths-13), net earnings increased 30% to $6.6 million, or $0.30 per share, from $5.1 million, or $0.24 per share, for the first half of 2012 (6mths-12).

Since 1993, Intervest has been primarily engaged in commercial and multifamily real estate mortgage lending with an emphasis on cash flowing properties located on the East Coast of the U.S. Its lending operation is highly personalized and targeted to provide customized financing solutions for real estate acquisitions and operations. Intervest does not make construction or land development loans or single family home loans.

The increase in net earnings for both 2013 periods was primarily driven by a credit for loan losses, a lower provision for real estate losses and a decrease in net real estate expenses, partially offset by decreases in both net interest income and noninterest income and higher income tax expense as discussed below.

Financial Operating Highlights

Financial Condition Highlights

The decrease in net interest and dividend income, the Company’s primary source of earnings, of $1.1 million in Q2-13 and $2.1 million in 6mths-13 was primarily due to INB’s smaller balance sheet, partially offset by a higher net interest margin. In Q2-13, total average interest-earning assets decreased by $260 million from Q2-12, reflecting decreases of $98 million in loans and $162 million in total securities and overnight investments. At the same time, average deposits and borrowed funds decreased by $274 million and $10 million, respectively, while average stockholders’ equity increased by $14 million. The net interest margin increased slightly by 7 basis points to 2.30% in Q2-13, reflecting a 5 basis point improvement in the interest rate spread and a higher ratio of interest-earning assets to interest-bearing liabilities, or a $24 million increase in net interest-earning assets. The higher spread was due to lower rates paid on deposits and the 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 significantly lower market interest rates. Overall, the average cost of funds decreased by 37 basis points to 2.09% in Q2-13, from 2.46% in Q2-12, while the average yield on earning assets decreased at a slower pace or by 32 basis points to 4.20% in Q2-13, from 4.52% in Q2-12. For the 6mths-13 period, total average interest-earning assets decreased by $284 million from 6mths-12, reflecting decreases of $83 million in loans and $201 million in total securities and overnight investments. At the same time, average deposits and borrowed funds decreased by $290 million and $12 million, respectively, while average stockholders’ equity increased by $14 million. The net interest margin increased by 14 basis points to 2.33% in 6mths-13. The average cost of funds decreased by 39 basis points to 2.11% in 6mths-13, from 2.50% in 6mths-12, while the average yield on earning assets decreased by 28 basis points to 4.23% in 6mths-13, from 4.51% in 6mths-12. The reasons for the six-month changes were the same as the quarterly variances.

The decrease in securities held to maturity was due to calls exceeding new purchases. At June 30, 2013, the portfolio represented 26% of total assets and was comprised almost entirely of U.S. government agency debt ($335 million) and residential mortgage-backed pass-through securities ($73 million), with a weighted-average expected yield, remaining life and contractual maturity of 1.04%, 3.5 years and 6.6 years, respectively.

The decrease in loans receivable reflected $154.0 million of payoffs, $18.5 million of amortization, $1.9 million of chargeoffs and a $3.0 million transfer to REO, largely offset by $124.2 million of new loans and $2.0 million of recoveries of prior loan charge offs. New originations were comprised primarily of $78.3 million of commercial real estate loans, $25.8 million of multifamily loans and $19.6 million of loans made on investor owned 1-4 family condominiums. Loans paid off in 6mths-13 had a weighted-average yield of 5.98%. New loans in 6mths-13 had a weighted-average yield, term and loan-to-value ratio of 4.47%, 5.9 years and 58%, respectively, compared to 4.85%, 5.4 years and 58%, respectively, in 6mths-12. Nearly all of the new loans in both periods had fixed interest rates.

The decrease in deposits reflected a $54 million decrease in CD accounts, of which $8 million were brokered, and a $24 million decrease in money market accounts. At June 30, 2013, there were $70 million of brokered CDs outstanding with a rate of 4.89%, of which $33 million mature within one year.

The increase in stockholders’ equity was primarily due to $7.4 million of net earnings (before preferred dividend requirements) and $0.7 million from the exercise of stock options and stock compensation expense. These increases were nearly offset by a $6.1 million reduction in preferred stock and the payment of $1.2 million in preferred dividends. As previously announced, in June 2013, IBC completed the repurchase of 6,250 shares of its Series A Preferred Stock from the U.S. Treasury and those shares were retired. The shares were repurchased at $970 per share, plus accrued and unpaid dividends through June 24, 2013. The remaining 18,750 shares were sold by the Treasury to third party investors and continue to be outstanding at June 30, 2013.

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 agreement to which IBC is subject 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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