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

                                   FORM 8-K/A

                               AMENDMENT NO. 1 TO
                                 CURRENT REPORT

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

                Date of Report (Date of earliest event reported):

                                  June 2, 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 4.01.  Changes in Registrant's Certifying Accountant.

As  previously  reported,  on June 2,  2005,  Barrett  Business  Services,  Inc.
("BBSI"), dismissed its previous independent accountants, PricewaterhouseCoopers
LLP ("PwC"),  and engaged Moss Adams LLP ("Moss  Adams") as BBSI's new principal
independent registered public accounting firm to audit its financial statements.
The Audit Committee of BBSI's Board of Directors directed the review process and
made the final decision to dismiss PwC and engage Moss Adams.

The reports of PwC on BBSI's  financial  statements  for the fiscal  years ended
December 31, 2004 and 2003 did not contain an adverse opinion or a disclaimer of
opinion and were not  qualified  or modified as to  uncertainty,  audit scope or
accounting principles.

During the fiscal  years ended  December 31, 2003 and 2004,  and the  subsequent
interim period through June 2, 2005,  BBSI had no  disagreement  with PwC on any
matter of accounting principles or practices, financial statement disclosure, or
auditing  scope  or  procedure,  which  disagreement,  if  not  resolved  to the
satisfaction  of PwC,  would have  caused PwC to make  reference  to the subject
matter of the  disagreement  in connection  with its report on BBSI's  financial
statements  for such  fiscal  years,  other  than a matter  relating  to  BBSI's
financial  statements  for the fiscal year ended  December 31, 2004.  This issue
related to the effect of an accounting  principle on the reporting of assets and
liabilities relating to workers'  compensation claims that are insured by BBSI's
prior excess workers' compensation  insurance carrier, and was resolved to PwC's
satisfaction  by BBSI's  presentation  of its  accrued  liabilities  for certain
insured  workers'  compensation  claims on a gross basis on its balance  sheets,
along with a  corresponding  receivable  from its insurer.  The Audit  Committee
discussed  this  issue  with  BBSI's  management  and  with  PwC.  It is  BBSI's
management's  view that, in analyzing  whether the application of a longstanding
accounting   principle  required  a  change  in  the  presentation  of  workers'
compensation  liabilities and receivables on BBSI's balance sheets,  its initial
viewpoint  differed  from that of PwC,  following  which  BBSI  acceded to PwC's
conclusions.  BBSI's decision to engage new independent accountants to audit its
financial statements did not result directly from this issue.

During the period from  January 1, 2003  through  June 2, 2005,  no  "reportable
events," as described in Item  304(a)(1)(v) of Regulation S-K promulgated by the
Securities and Exchange Commission, occurred with respect to BBSI.

BBSI  has  authorized  PwC to  respond  fully  to the  inquiries  of Moss  Adams
concerning the matters described above.

A copy of a letter dated June 14, 2005, addressed to the Securities and Exchange
Commission from PwC stating that it agrees with the above statements  concerning
PwC (other than making no comment  whatsoever  regarding whether BBSI's decision
to engage new independent  accountants to audit its financial statements did not
result directly from the disagreement  described  above),  is included with this
Form 8-K/A as Exhibit 16.1.

During  the  period  from  January 1, 2003  through  June 2, 2005,  BBSI did not
consult with Moss Adams regarding (1) the  application of accounting  principles
to a specified transaction, whether



completed or proposed, (2) the type of audit opinion that might be rendered with
respect to BBSI's  financial  statements  or (3) any matter  that was either the
subject of a "disagreement"  or a "reportable  event" (as such terms are defined
in Items 304(a)(1)(iv) and (v) of Regulation S-K).

Item 9.01.  Financial Statements and Exhibits.

      16.1  Letter  from   PricewaterhouseCoopers  LLP  to  the  Securities  and
            Exchange Commission dated June 14, 2005.

                                   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:  June 15, 2005               By: Michael D. Mulholland
                                        --------------------------------------
                                        Michael D. Mulholland
                                        Vice President - Finance