    <SEC-DOCUMENT>0000950170-24-046434-index.html : 20240422
    <SEC-HEADER>0000950170-24-046434.hdr.sgml : 20240422
    <ACCEPTANCE-DATETIME>20240422161757
    ACCESSION NUMBER:		0000950170-24-046434
    CONFORMED SUBMISSION TYPE:	DEFA14A
    PUBLIC DOCUMENT COUNT:		4
    FILED AS OF DATE:		20240422
    DATE AS OF CHANGE:		20240422

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			BARRETT BUSINESS SERVICES INC
    		CENTRAL INDEX KEY:			0000902791
    		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-HELP SUPPLY SERVICES [7363]
    		ORGANIZATION NAME:           	07 Trade & Services
    		IRS NUMBER:				520812977
    		STATE OF INCORPORATION:			MD
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		DEFA14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	000-21886
    		FILM NUMBER:		24861407

    	BUSINESS ADDRESS:
    		STREET 1:		8100 NE PARKWAY DRIVE
    		STREET 2:		SUITE 200
    		CITY:			VANCOUVER
    		STATE:			WA
    		ZIP:			98662
    		BUSINESS PHONE:		(800) 494-5669

    	MAIL ADDRESS:
    		STREET 1:		8100 NE PARKWAY DRIVE
    		STREET 2:		SUITE 200
    		CITY:			VANCOUVER
    		STATE:			WA
    		ZIP:			98662
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>DEFA14A
    <SEQUENCE>1
    <FILENAME>proxy_addtl_materials_20.htm
    <DESCRIPTION>DEFA14A
    <TEXT>
    Document 1 - file: proxy_addtl_materials_20.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>2
    <FILENAME>img72954952_0.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 2 - file: img72954952_0.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>img72954952_1.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 3 - file: img72954952_1.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>4
    <FILENAME>img72954952_2.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 4 - file: img72954952_2.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>