BankFinancial
                                                                     Corporation

FOR IMMEDIATE RELEASE


     BankFinancial Corporation Extends and Expands Share Repurchase Program

Burr Ridge, Illinois - (March 27, 2008) BankFinancial Corporation (Nasdaq -
BFIN) announced today that its Board of Directors has extended the expiration
date of the Company's current share repurchase authorization from March 31, 2008
until November 15, 2008, and has increased by 201,639 shares the number of
shares that can be repurchased in accordance with the authorization. The
increase represents approximately 1% of the Company's issued and outstanding
shares of common stock as of March 26, 2008. As of March 26, 2008, the Company
had repurchased 3,307,023 shares of its common stock out of the 3,605,384 shares
that had been previously authorized for repurchase. As a result of these
actions, the Company is currently authorized to repurchase 500,000 shares of
common stock.

     The  authorization  permits  shares  to be  repurchased  in open  market or
negotiated transactions, and pursuant to any trading plan that may be adopted in
accordance with Rule 10b5-1 of the Securities and Exchange Commission.

     The authorization will be utilized at management's discretion, subject to
the limitations set forth in Rule 10b-18 of the Securities and Exchange
Commission and other applicable legal requirements, and to price and other
internal limitations established by the Company's Board of Directors.

     The authorization will expire on November 15, 2008, and may be suspended,
terminated or modified at any time prior to that date for any reason, including
market conditions, the cost of repurchasing shares, the availability of
alternative investment opportunities, liquidity, and other factors deemed
appropriate. These factors may also affect the timing and amount of share
repurchases.

     The authorization does not obligate the Company to purchase any particular
number of shares. Any shares that are repurchased pursuant to the authorization
may be utilized to fund grants that are made under the Equity Incentive Plan
that the Company's stockholders approved at the Company's 2006 Annual Meeting,
and for other corporate purposes.

     Share repurchases will be funded from available working capital,
supplemented if deemed necessary or desirable with dividends from the Company's
principal subsidiary that will be subject to regulatory approval or
non-objection.

     The Company is the holding company for BankFinancial, F.S.B., a
full-service, community-oriented savings bank providing financial services to
individuals, families and businesses through 18 full-service banking offices,
located in Cook, DuPage, Lake and Will Counties, Illinois. At December 31, 2007,
the Company had total assets of $1.481 billion, total loans of $1.254 billion,
total deposits of $1.074 billion and stockholders' equity of $291 million. As of
March 26, 2008, the Company had 21,992,077 million issued and outstanding shares
of common stock. The Company's common stock trades on the Nasdaq Global Select
Market under the symbol BFIN.

     "Forward-looking statements" as defined in the Private Securities
Litigation Reform Act of 1995 may be included in this release. A variety of
factors could cause BankFinancial Corporation's actual results to differ from
those expected at the time of this release. Investors are urged to carefully
review and consider the various disclosures made by BankFinancial Corporation in
its periodic reports filed with the Securities and Exchange Commission,
including the risk factors and other information disclosed in BankFinancial
Corporation's Annual Report on Form 10-K for the most recently ended fiscal
year. Copies of these filings are available at no cost on the SEC's web site at
http://www.sec.gov or on BankFinancial's web site at
http://www.bankfinancial.com.

For Further Information

For Further Information Contact:
Shareholder, Analyst and Investor Inquiries:      Media Inquiries:
Elizabeth A. Doolan,                              Gregg T. Adams,
Senior Vice President - Controller                Executive Vice President -
BankFinancial Corporation                         Marketing & Sales
Telephone: 630-242-7151                           BankFinancial Corporation
                                                  Telephone: 630-242-7234