July 1, 2002


Barrett Business Services, Inc.
4724 SW Macadam Avenue
Portland, OR 97201

Gentlemen:

      This letter amendment (this  "Amendment") is to confirm the changes agreed
upon  between  WELLS  FARGO  BANK,  NATIONAL  ASSOCIATION  ("Bank")  and BARRETT
BUSINESS SEVICES,  INC. ("Borrower") to the terms and conditions of that certain
letter agreement  between Bank and Borrower dated as of May 31, 2000, as amended
from time to time (the "Agreement").

                                    RECITALS

      WHEREAS,  Pursuant to the  Agreement,  Borrower  remains  indebted to Bank
under a line of credit in the  maximum  principal  amount  of  Thirteen  Million
Dollars  ($13,000,000.00)  (the "Prior Line of  Credit"),  which is evidenced by
that certain  Revolving  Line of Credit Note dated May 31, 2001 (the "Prior Line
of Credit Note").  The Prior Line of Credit Note shall mature and become due and
payable  in full on July 1,  2002 and as of the  date  hereof,  the  outstanding
principal balance under the Prior Line of Credit is $4,266,764.89,  plus accrued
but unpaid interest.

      WHEREAS,  Pursuant to the  Agreement,  Borrower  remains  indebted to Bank
under a term loan in the original  principal amount of Six Hundred  Ninety-three
Thousand Seven Hundred Fifty Dollars ($693,750.00) (the "Term Loan A"), which is
evidenced by that certain  Promissory Note dated August 12, 1993 (the "Term Note
A").  Term Note A shall  mature and become due and  payable in full on August 1,
2003 and as of the date hereof,  the  outstanding  principal  balance under Term
Loan A is $372,001.84, plus accrued but unpaid interest.

      WHEREAS, Bank and Borrower have agreed to certain changes in the terms and
conditions  set forth in the Agreement and have agreed to amend the Agreement to
reflect said changes.

      NOW, THEREFORE, for valuable consideration, the receipt and sufficiency of
which are hereby  acknowledged,  subject to the terms and  conditions  described
herein, the parties hereto agree that the Agreement shall be amended as follows;
PROVIDED,  HOWEVER, that nothing shall terminate any security interests or other
documents  in favor of Bank,  all of which shall remain in full force and effect
unless expressly amended hereby:

Barrett Business Services, Inc.
July 1, 2002
Page 2





      1. The Agreement is hereby  amended by deleting "July 1, 2002" as the last
day on  which  Bank  will  make  advances  under  the  Line  of  Credit,  and by
substituting for said date "September 2, 2002," with such change to be effective
upon the execution and delivery to Bank of a promissory  note  substantially  in
the form of  Exhibit  A  attached  hereto  (the  "Line of Credit  Note")  (which
promissory  note shall  replace and be deemed the Line of Credit Note defined in
and made pursuant to the Agreement)  and all other  contracts,  instruments  and
documents  required by Bank to evidence  such  change;  PROVIDED,  HOWEVER  that
advances made under the Prior Line of Credit Note shall be deemed made under the
Prior Line of Credit Note.

      2. AMENDMENT TO PARAGRAPH V.3.  Paragraph  V.3(c) is hereby  renumbered as
Paragraph  V.3 (d)  and the  following  is  hereby  added  to the  Agreement  as
Paragraph V.3(c):

      "(c) not  later  than 26 days  after  and as of the end of each  first and
second month of each fiscal  quarter and 35 days after and as of the end of each
fiscal quarter, a financial statement of Borrower,  to include balance sheet and
income statement;"

      3. AMENDMENT TO PARAGRAPHS V.9 (B) AND (D). Paragraphs V.9 (b) and (d) are
hereby deleted in their entirety and the following substituted therefor:

      "(b)  EBITDA not less than  negative  $1,950,000.00  as of fiscal  quarter
ending June 30, 2002,  measured on a trailing  four-quarter basis, with "EBITDA"
defined  as net profit  before tax plus  interest  expense  (net of  capitalized
interest expense), depreciation expense and amortization expense.

      (d) Outstanding Line Liabilities not greater than seventy percent (70%) of
Borrower's trade accounts  receivable as of each fiscal quarter end,  commencing
fiscal quarter ending June 30, 2002 with "Outstanding Line Liabilities"  defined
as  outstanding  borrowings  under  the Line of Credit  plus the face  amount of
outstanding Letters of Credit."

      4. RESTRUCTURING FEE. In consideration of the changes set forth herein and
as a condition  to the  effectiveness  hereof,  immediately  upon  signing  this
Amendment  Borrower shall pay to Bank a  non-refundable  fee of $10,000.00  (the
"Restructuring Fee").

      5.  CONDITIONS  PRECEDENT.  The  obligation of Bank to amend the terms and
conditions of the Agreement as provided herein, is subject to the fulfillment to
Bank's satisfaction of all of the following  conditions by no later than July 7,
2002:

      (a) Bank shall have received, in form and substance  satisfactory to Bank,
each of the following, duly executed:

        (i)     This Amendment.
        (ii)    The Line of Credit Note.
        (iii)   Such other documents as Bank may require under any other section
                of this Amendment.

      (B)  RESTRUCTURING  FEE. Bank shall have received the Restructuring Fee in
immediately available funds.

Barrett Business Services, Inc.
July 1, 2002
Page 3


      (C) OTHER FEES AND COSTS. In addition to Borrower's  obligations under the
Agreement  and the other Loan  Documents,  Borrower  shall have paid to Bank the
full amount of all costs and  expenses,  including  reasonable  attorneys'  fees
(including the allocated costs of Bank's in-house  counsel) expended or incurred
by Bank in connection  with the  negotiation  and preparation of this Amendment,
for which Bank has made demand.

      (e) INTEREST. Interest under the Prior Line of Credit Note shall have been
paid current.

      (f) INTEREST AND PRINCIPAL. Interest and principal under Term Note A shall
have been paid current.

      6. GENERAL RELEASE.  In consideration of the benefits provided to Borrower
under  the  terms and  provisions  hereof,  Borrower  hereby  agrees as  follows
("General Release"):

      (a) Borrower, for itself and on behalf of its successors and assigns, does
hereby release, acquit and forever discharge Bank, all of Bank's predecessors in
interest,  and all of Bank's past and present  officers,  directors,  attorneys,
affiliates,  employees  and  agents,  of and from any and all  claims,  demands,
obligations,  liabilities,  indebtedness, breaches of contract, breaches of duty
or of any relationship,  acts, omissions,  misfeasance,  malfeasance,  causes of
action,  defenses,  offsets,  debts,  sums  of  money,  accounts,  compensation,
contracts,  controversies,  promises,  damages,  costs, losses and expenses,  of
every type, kind,  nature,  description or character,  whether known or unknown,
suspected or unsuspected,  liquidated or unliquidated,  each as though fully set
forth herein at length (each, a "Released Claim" and collectively, the "Released
Claims"),  that Borrower now has or may acquire as of the later of: (i) the date
this Amendment becomes effective through the satisfaction (or waiver by Bank) of
all  conditions  hereto;  (ii) the date that Borrower has executed and delivered
this  Amendment to Bank  (hereafter,  the  "Release  Date"),  including  without
limitation,  those Released Claims in any way arising out of,  connected with or
related to any and all prior credit accommodations, if any, provided by Bank, or
any of Bank's predecessors in interest, to Borrower,  and any agreements,  notes
or  documents  of any kind  related  thereto  or the  transactions  contemplated
thereby or hereby,  or any other  agreement  or  document  referred to herein or
therein.

      (b) Borrower hereby acknowledges,  represents and warrants to Bank that it
agrees to assume the risk of any and all unknown, unanticipated or misunderstood
defenses  and  Released  Claims  which are  released by the  provisions  of this
General  Release in favor of Bank,  and Borrower  hereby waives and releases all
rights and benefits which it might  otherwise have under any state or local laws
or  statutes  with  regard to the  release  of such  unknown,  unanticipated  or
misunderstood defenses and Released Claims.

      (c) Each person signing below on behalf of Borrower  acknowledges  that he
or she has read each of the provisions of this General Release. Each such person
fully  understands  that this General Release has important legal  consequences,
and each such  person  realizes  that they are  releasing  any and all  Released
Claims  that  Borrower  may  have  as  of  the  Release  Date.  Borrower  hereby
acknowledges  that  it has  had an  opportunity  to  obtain  a  lawyer's  advice
concerning  the legal  consequences  of each of the  provisions  of this General
Release.

      (d) Borrower hereby specifically acknowledges and agrees that: (i) none of
the  provisions  of this General  Release shall be construed as or constitute an
admission of any  liability  on the part of Bank;  (ii) the  provisions  of this
General  Release shall  constitute an



Barrett Business Services, Inc.
July 1, 2002
Page 4


absolute bar to any Released Claim of any kind,  whether any such Released Claim
is based on  contract,  tort,  warranty,  mistake or any other  theory,  whether
legal, statutory or equitable;  and (iii) any attempt to assert a Released Claim
barred by the provisions of this General  Release shall subject  Borrower to the
provisions  of  applicable  law setting  forth the  remedies for the bringing of
groundless, frivolous or baseless claims or causes of action.

      7.  MISCELLANEOUS.  Except as specifically  provided herein, all terms and
conditions of the Agreement  remain in full force and effect,  without waiver or
modification.  All terms  defined in the  Agreement  shall have the same meaning
when used herein.  This Amendment and the Agreement  shall be read together,  as
one document. This Amendment may be executed in any number of counterparts, each
of which when executed and delivered shall be deemed to be an original,  and all
of which when taken together shall constitute one and the same Amendment.

      8.   REAFFIRMATION;    CERTIFICATION.    Borrower   hereby   remakes   all
representations  and  warranties  contained in the  Agreement  and reaffirms all
covenants set forth therein.  Borrower further  certifies that as of the date of
Borrower's  acknowledgment  set forth below  there  exists no default or defined
event of default under the Agreement or any promissory  note or other  contract,
instrument or document executed in connection therewith,  nor any condition, act
or event  which with the  giving of notice or the  passage of time or both would
constitute such a default or defined event of default.

      9. Except as specifically provided herein, all terms and conditions of the
Agreement remain in full force and effect,  without waiver or modification.  All
terms  defined in the  Agreement  shall have the same  meaning when used herein.
This Amendment and the Agreement shall be read together, as one document.

      10. Borrower hereby remakes all representations  and warranties  contained
in the Agreement and reaffirms all covenants set forth therein. Borrower further
certifies that as of the date of Borrower's acknowledgment set forth below there
exists no  default  or  defined  event of  default  under the  Agreement  or any
promissory note or other contract, instrument or document executed in connection
therewith,  nor any  condition,  act or event which with the giving of notice or
the passage of time or both would  constitute such a default or defined event of
default.

UNDER OREGON LAW, MOST  AGREEMENTS,  PROMISES AND COMMITMENTS MADE BY BANK AFTER
OCTOBER 3, 1989 CONCERNING  LOANS AND OTHER CREDIT  EXTENSIONS WHICH ARE NOT FOR
PERSONAL,  FAMILY OR  HOUSEHOLD  PURPOSES  OR SECURED  SOLELY BY THE  BORROWER'S
RESIDENCE MUST BE IN WRITING,  EXPRESS CONSIDERATION AND BE SIGNED BY BANK TO BE
ENFORCEABLE.

Barrett Business Services, Inc.
July 1, 2002
Page 5


      Your  acknowledgment of this Amendment shall constitute  acceptance of the
foregoing terms and conditions.

                                                       Sincerely,

                                                       WELLS FARGO BANK,
                                                          NATIONAL ASSOCIATION


                                                       By: /s/ Stephen J. Day
                                                          ----------------------
                                                             Stephen J. Day
                                                             Vice President


Acknowledged and accepted as of   06/25/02      :
                                ----------------

BARRETT BUSINESS SERVICE, INC.


By: /s/ Michael D. Mulholland
    --------------------------
      Michael D. Mulholland
      Vice President-Finance





                          REVOLVING LINE OF CREDIT NOTE


$12,000,000.00                                                  Portland, Oregon
                                                                    July 1, 2002

      FOR VALUE  RECEIVED,  the  undersigned  BARRETT  BUSINESS  SERVICES,  INC.
("Borrower")  promises  to  pay to the  order  of  WELLS  FARGO  BANK,  NATIONAL
ASSOCIATION  ("Bank")  at its office at 1300 SW 5th Avenue,  Tower,  14th Floor,
Portland Oregon,  or at such other place as the holder hereof may designate,  in
lawful money of the United States of America and in immediately available funds,
the principal sum of Twelve Million Dollars ($12,000,000.00), or so much thereof
as may be advanced and be outstanding,  with interest thereon, to be computed on
each advance from the date of its disbursement as set forth herein.

INTEREST:

      (a) INTEREST.  The outstanding  principal  balance of this Note shall bear
interest  (computed on the basis of a 360-day  year,  actual days  elapsed) at a
rate per annum one  percent  (1%)  above the Prime  Rate in effect  from time to
time.  The "Prime  Rate" is a base rate that Bank from time to time  establishes
and  which  serves as the basis  upon  which  effective  rates of  interest  are
calculated for those loans making reference thereto.  Each change in the rate of
interest  hereunder shall become effective on the date each Prime Rate change is
announced within Bank.

      (b) PAYMENT OF INTEREST. Interest accrued on this Note shall be payable on
the first day of each month, commencing August 1, 2002.

      (c) DEFAULT  INTEREST.  From and after the maturity  date of this Note, or
such earlier date as all principal  owing  hereunder  becomes due and payable by
acceleration or otherwise,  the outstanding principal balance of this Note shall
bear interest until paid in full at an increased rate per annum (computed on the
basis of a 360-day year,  actual days elapsed)  equal to four percent (4%) above
the rate of interest from time to time applicable to this Note.

BORROWING AND REPAYMENT:

      (a)  BORROWING  AND  REPAYMENT.  Borrower may from time to time during the
term of this Note borrow,  partially or wholly repay its outstanding borrowings,
and reborrow,  subject to all of the  limitations,  terms and conditions of this
Note and of any document  executed in  connection  with or governing  this Note;
provided however,  that the total  outstanding  borrowings under this Note shall
not at any time exceed the principal  amount stated above.  The unpaid principal
balance  of this  obligation  at any time  shall be the total  amounts  advanced
hereunder by the holder hereof less the amount of principal payments made hereon
by or for any Borrower,  which balance may be endorsed  hereon from time to time
by the holder.  The outstanding  principal balance of this Note shall be due and
payable in full on September 2, 2002.

      (b) ADVANCES. Advances hereunder, to the total amount of the principal sum
stated  above,  may be made by the holder at the oral or written  request of (i)
William W.  Sherertz or Michael D.  Mulholland,  any one acting  alone,  who are
authorized to request  advances and direct the disposition of any advances until
written  notice of the revocation of such authority is received by the holder at
the office  designated  above,  or (ii) any  person,  with  respect to




advances  deposited to the credit of any deposit account of any Borrower,  which
advances, when so deposited, shall be conclusively presumed to have been made to
or for the benefit of each  Borrower  regardless  of the fact that persons other
than those  authorized  to request  advances may have  authority to draw against
such  account.  The holder shall have no  obligation  to  determine  whether any
person requesting an advance is or has been authorized by any Borrower.

      (c)  APPLICATION  OF  PAYMENTS.  Each  payment  made on this Note shall be
credited  first,  to any  interest  then  due  and  second,  to the  outstanding
principal balance hereof.

EVENTS OF DEFAULT:

      The  occurrence  of any of the  following  shall  constitute  an "Event of
Default" under this Note:

      (a) The failure to pay any principal, interest, fees or other charges when
due  hereunder  or under  any  contract,  instrument  or  document  executed  in
connection with this Note.

      (b) The filing of a petition by or against any Borrower,  any guarantor of
this Note or any general  partner or joint  venturer in any Borrower  which is a
partnership or a joint venture (with each such guarantor, general partner and/or
joint  venturer  referred  to  herein  as a "Third  Party  Obligor")  under  any
provisions of the Bankruptcy  Reform Act, Title 11 of the United States Code, as
amended  or  recodified  from time to time,  or under any  similar  or other law
relating to bankruptcy, insolvency,  reorganization or other relief for debtors;
the  appointment of a receiver,  trustee,  custodian or liquidator of or for any
part of the assets or property  of any  Borrower  or Third  Party  Obligor;  any
Borrower or Third Party Obligor becomes  insolvent,  makes a general  assignment
for the benefit of creditors or is generally not paying its debts as they become
due; or any  attachment  or like levy on any  property of any  Borrower or Third
Party Obligor.

      (c) The death or  incapacity  of any  individual  Borrower  or Third Party
Obligor,  or the  dissolution  or  liquidation  of any  Borrower  or Third Party
Obligor  which is a  corporation,  partnership,  joint  venture or other type of
entity.

      (d) Any default in the payment or  performance of any  obligation,  or any
defined event of default,  under any  provisions of any contract,  instrument or
document  pursuant to which any Borrower or Third Party Obligor has incurred any
obligation for borrowed money, any purchase  obligation,  or any other liability
of any kind to any person or entity, including the holder.

      (e) Any  financial  statement  provided  by any  Borrower  or Third  Party
Obligor to Bank proves to be  incorrect,  false or  misleading  in any  material
respect.

      (f) Any sale or transfer of all or a  substantial  or material part of the
assets of any Borrower or Third Party Obligor other than in the ordinary  course
of its business.

      (g) Any  violation or breach of any  provision of, or any defined event of
default  under,  any  addendum  to this  Note or any loan  agreement,  guaranty,
security  agreement,  deed of trust,  mortgage  or other  document  executed  in
connection with or securing this Note.



MISCELLANEOUS:

      (a) REMEDIES.  Upon the occurrence of any Event of Default,  the holder of
this Note,  at the  holder's  option,  may  declare  all sums of  principal  and
interest  outstanding  hereunder  to be  immediately  due  and  payable  without
presentment,  demand,  notice of nonperformance,  notice of protest,  protest or
notice of dishonor,  all of which are expressly waived by each Borrower, and the
obligation,  if any, of the holder to extend any further credit  hereunder shall
immediately  cease  and  terminate.  Each  Borrower  shall  pay  to  the  holder
immediately  upon demand the full  amount of all  payments,  advances,  charges,
costs and expenses,  including  reasonable  attorneys'  fees (to include outside
counsel fees and all allocated costs of the holder's in-house counsel), expended
or incurred by the holder in  connection  with the  enforcement  of the holder's
rights and/or the collection of any amounts which become due to the holder under
this Note,  and the  prosecution  or defense of any action in any way related to
this Note,  including  without  limitation,  any action for declaratory  relief,
whether incurred at the trial or appellate  level, in an arbitration  proceeding
or otherwise, and including any of the foregoing incurred in connection with any
bankruptcy proceeding  (including without limitation,  any adversary proceeding,
contested  matter or motion brought by Bank or any other person) relating to any
Borrower or any other person or entity.

      (b) OBLIGATIONS  JOINT AND SEVERAL.  Should more than one person or entity
sign this Note as a Borrower,  the  obligations  of each such Borrower  shall be
joint and several.

      (c)  GOVERNING  LAW.  This Note  shall be  governed  by and  construed  in
accordance with the laws of the State of Oregon.

UNDER OREGON LAW, MOST  AGREEMENTS,  PROMISES AND COMMITMENTS MADE BY BANK AFTER
OCTOBER 3, 1989 CONCERNING  LOANS AND OTHER CREDIT  EXTENSIONS WHICH ARE NOT FOR
PERSONAL,  FAMILY OR  HOUSEHOLD  PURPOSES  OR SECURED  SOLELY BY THE  BORROWER'S
RESIDENCE MUST BE IN WRITING,  EXPRESS CONSIDERATION AND BE SIGNED BY BANK TO BE
ENFORCEABLE.

      IN WITNESS WHEREOF,  the undersigned has executed this Note as of the date
first written above.

BARRETT BUSINESS SERVICES, INC.

By: /s/ Michael D. Mulholland
    ---------------------------
      Michael D. Mulholland
      Vice President-Finance