Exhibit 99.1

NEWS RELEASE

For Immediate Release Contact: William W. Sherertz
President and
Chief Executive Officer

Telephone: (503) 220-0988

BBSI ANNOUNCES THE SUCCESSFUL COMPLETION OF ITS
COMMON STOCK OFFERING

PORTLAND, OREGON, August 8, 2005 - Barrett Business Services, Inc.
(Nasdaq: BBSI) announced today that, in connection with its recent follow-on
common stock offering, the underwriters have exercised in full their option to
purchase an additional 320,850 shares of BBSI common stock to cover
over-allotments. This action increases the total number of shares sold by BBSI
in the common stock offering to 2,184,850 shares at a price to the public of
$16.25 per share before underwriting discounts and commissions.

BBSI President and Chief Executive Officer, William W. Sherertz, stated
that, "We are very pleased with the market's reception of our follow-on common
stock offering."

Roth Capital Partners, LLC, acted as the lead managing underwriter of the
offering and The Seidler Companies Incorporated served as co-manager.

The shares of common stock were sold pursuant to a registration statement
that has been declared effective by the Securities and Exchange Commission. The
shares are offered only by means of the prospectus related to this offering.
This press release shall not constitute an offer to sell or a solicitation of an
offer to buy nor shall there be any sale of these securities in any state or
jurisdiction in which such offer, solicitation or sale would be unlawful prior
to registration or qualification under the securities laws of such state or
jurisdiction.

BBSI provides a comprehensive range of human resource management solutions
to large and small companies throughout many regions of the United States.

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