Wash. Rev. Code § 50.04.100
"Employment," subject only to the other provisions of this title, means personal service, of whatever nature, unlimited by any employment relationship as known to the common law or any other legal relationship, including service in interstate commerce, performed for wages or under any contract calling for the performance of personal services, written or oral, express or implied.
Except as provided by RCW 50.04.145, personal services performed for an employing unit by one or more contractors or subcontractors acting individually or as a partnership, which do not meet the provisions of RCW 50.04.140, shall be considered employment of the employing unit: PROVIDED, HOWEVER, That such contractor or subcontractor shall be an employer under the provisions of this title in respect to personal services performed by individuals for such contractor or subcontractor.
RCW 50.04.100
Intent- 2023 c 25 : "In enacting this act, the legislature only intends to amend the Revised Code of Washington to use inclusive language. The legislature does not intend to either increase or reduce the scope of the definitions of "employment" contained in Title 50 or 50A RCW." [2023 c 25 s 3.]
Severability-Conflict with federal requirements-1982 1st ex.s. c 18: See notes following RCW 50.12.200.