November 22, 2005

First Business Financial Services, Inc. Announces Quarterly Results

MADISON, WI -- (MARKET WIRE) -- 11/22/05 -- First Business Financial Services, Inc. (the "Company") (NASDAQ: FBIZ) announced today net income for the quarter ended September 30, 2005 of $916 thousand, or $0.37 per diluted share, compared with net income of $717 thousand, or $0.29 per diluted share, for the same quarter in 2004. The growth in net income and diluted earnings per share represented an increase of 28% over the comparable period last year.

For the nine months ended September 30, 2005, the Company reported net income of $3.7 million, or $1.49 per diluted share, compared with net income of $3.1 million, or $1.37 per diluted share, for the comparable period last year.

The Company’s total assets ended the third quarter of 2005 at $628.9 million, an annualized increase of 15.6% over the $563.0 million in total assets recorded at December 31, 2004. Net loans and leases at September 30, 2005 were $501.5 million, up an annualized 9.0% over the $469.8 million in net loans at December 31, 2005.

About First Business Financial Services, Inc.

First Business Financial Services (Nasdaq:FBIZ) is a $1.3 billion Wisconsin-based bank holding company that specializes in focused financial solutions for businesses, key executives, and high net worth individuals through its operating companies. Its companies include: First Business Bank - Madison; First Business Bank - Milwaukee; First Business Bank - Northeast; First Business Trust & Investments; First Business Equipment Finance, LLC; and First Business Capital Corp. For additional information, visit www.firstbusiness.com or call (608) 238-8008.

The First Business Financial Services, Inc. logo is available at http://www.firstbusiness.com/logo

Forward-Looking Statements
This press release contains forward-looking statements that reflect the Corporation's plans, estimates and beliefs. When used in this press release, the words "anticipate," "believe," "estimate," "expect," "objective" and similar expressions and verbs in the future tense are intended to identify forward-looking statements. The statements contained in this press release involve or may involve certain assumptions, risks, and uncertainties, many of which are beyond the Corporation's control, which could cause actual results to differ materially from those discussed in the forward-looking statements. The forward-looking statements included in this press release are only made as of the date hereof, and the Corporation undertakes no obligation to publicly update such forward-looking statements to reflect subsequent events or circumstances. In addition to the assumptions and other factors referenced specifically in connection with such statements, the factors described in "Item 1A. Risk Factors" in our Annual Report on Form 10-K and the following factors could impact the business and financial prospects of the Corporation: general economic conditions; legislative and regulatory initiatives; increased competition and other effects of deregulation and consolidation of the financial services industry; monetary and fiscal policies of the federal government; deposit flows; disintermediation; the cost and availability of funds; general market rates of interest; interest rates or investment returns on competing investments; demand for loan products; demand for financial services; changes in accounting policies or guidelines; general economic developments; acts of terrorism and developments in the war on terrorism; and changes in the quality or composition of loan and investment portfolios.

Contact:
Jodie Johnson
Assistant Vice President ? Marketing
First Business Financial Services, Inc.
(608) 232-5910
Email