UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549
                           ---------------------------

                                    FORM 8-K

                                 CURRENT REPORT

                       Pursuant to Section 13 or 15(d) of
                       the Securities Exchange Act of 1934

                Date of Report (Date of earliest event reported):

                                  July 18, 2005

                         BARRETT BUSINESS SERVICES, INC.
               (Exact name of registrant as specified in charter)

                                    Maryland
                 (State or other jurisdiction of incorporation)

                                     0-21886
                                (SEC File Number)

                                   52-0812977
                        (IRS Employer Identification No.)

         4724 S.W. Macadam Avenue
         Portland, Oregon                                    97239
         (Address of principal executive offices)           (Zip Code)

               Registrant's telephone number, including area code:

                                 (503) 220-0988

      Check the  appropriate  box below if the Form 8-K  filing is  intended  to
simultaneously  satisfy the filing obligation of the registrant under any of the
following provisions:

|_|   Written  communications  pursuant to Rule 425 under the Securities Act (17
      CFR 230.425)

|_|   Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR
      240.14a-12)

|_|   Pre-commencement  communications  pursuant  to  Rule  14d-2(b)  under  the
      Exchange Act (17 CFR 240.14d-2(b))

|_|   Pre-commencement  communications  pursuant  to  Rule  13e-4(c)  under  the
      Exchange Act (17 CFR 240.13e-4(c))






Item 2.02.  Results of Operations and Financial Condition.

On July 18, 2005,  Barrett Business Services,  Inc. (the "Company"),  filed with
the  Securities and Exchange  Commission  under Rule 424(a) under the Securities
Act of 1933 a  preliminary  prospectus  dated  July 15,  2005 (the  "Preliminary
Prospectus")  in  connection  with  its  Registration   Statement  on  Form  S-2
(Registration  No.  333-126496).  The Preliminary  Prospectus  includes  updated
information  regarding  management's earnings guidance included in the Company's
press release dated April 27, 2005,  that the Company's  gross  revenues for the
second quarter ending June 30, 2005, were expected to range from $172 million to
$174 million. In the Preliminary  Prospectus,  management states its belief that
gross revenues to be reported in the Company's  earnings  release for the second
quarter  ended July 30,  2005 will be greater  than $174  million.  The  Company
further  anticipates that its  corresponding  total revenues on a net basis will
equal or exceed $56 million,  after  subtracting  an estimated cost of gross PEO
revenues of $118 million. The Company currently expects to publish its financial
results for the 2005 second quarter in early August 2005.

The  Company's  financial  statements  prepared  in  accordance  with  generally
accepted  accounting  principles  in the  United  States  ("GAAP")  present  PEO
revenues on a net basis,  as required by GAAP. The Company changed its reporting
of PEO  revenues  from a gross  basis  to a net  basis  in 2002  because  it was
determined in accordance with the requirements of Emerging Issues Task Force No.
99-19,  "Reporting  Revenues Gross as a Principal  Versus Net as an Agent," that
the  Company was not the primary  obligor for the  services  provided by its PEO
clients  to  their  customers  pursuant  to the  Company's  PEO  contracts.  The
Company's  management  believes the gross revenue  information  included in this
report,  although not in  accordance  with GAAP, is more  informative  as to the
level  of the  Company's  business  activity  and more  illustrative  of how the
Company  manages its  operations,  including  the  preparation  of the Company's
internal operating forecasts,  because it presents the Company's PEO services on
a basis comparable to the Company's staffing services.

Statements in this report about future events or performance, including earnings
expectations  for the second  quarter of 2005, are  forward-looking  statements,
which involve known and unknown risks,  uncertainties and other factors that may
cause the actual  results of the  Company to be  materially  different  from any
future results expressed or implied by such forward-looking statements.  Factors
that could affect future results  include  economic  conditions in the Company's
service  areas,  the effect of changes in the Company's mix of services on gross
margin, future workers' compensation claims experience, the effect of changes in
the workers' compensation regulatory environment in one or more of the Company's
primary  markets,  collectibility  of accounts  receivable,  and availability of
funding for working capital purposes, among others. Other important factors that
may affect the Company's  future  prospects are described in the Company's  2004
Annual Report on Form 10-K. Although forward-looking  statements help to provide
complete  information  about  the  Company,  readers  should  keep in mind  that
forward-looking statements may be less reliable than historical information. The
Company undertakes no obligation to update or revise forward-looking  statements
in this report to reflect  events or changes in  circumstances  that occur after
the date of this report.








                                   SIGNATURES

            Pursuant to the requirements of the Securities Exchange Act of 1934,
the  registrant  has duly  caused  this report to be signed on its behalf by the
undersigned thereunto duly authorized.

                                    BARRETT BUSINESS SERVICES, INC.


Dated:  July 18, 2005               By: /s/ Michael D. Mulholland
                                        --------------------------------------
                                        Michael D. Mulholland
                                        Vice President - Finance