Wash. Rev. Code » Title 18 · Chapter 18.100
Revised Code of Washington

Wash. Rev. Code § 18.100.080 (2026)

✓ current as of May 2026
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No professional service corporation organized under this chapter shall engage in any business other than the rendering of the professional services for which it was incorporated or service as a trustee as authorized by RCW 11.36.021 or as a personal representative as authorized by RCW 11.36.010: PROVIDED, That nothing in this chapter or in any other provisions of existing law applicable to corporations shall be interpreted to prohibit such corporation from investing its funds in real estate, personal property, mortgages, stocks, bonds, insurance, or any other type of investments.
[ 1984 c 149 s 170; 1969 c 122 s 8.]

Notes:

Severability—Effective dates—1984 c 149: See notes following RCW 11.02.005.
Notes of Decisions
Cited in 3 cases, 1988–2010 · leading case: Columbia Physical Therapy, Inc. v. Benton Franklin Orthopedic Assocs., PLLC, 228 P.3d 1260 (Wash. 2010).
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Columbia Physical Therapy, Inc. v. Benton Franklin Orthopedic Assocs., PLLC, 228 P.3d 1260 (Wash. 2010). · cites it 5× “Second, Columbia argues that RCW 18.100.080 prohibits BFOA’s employment of physical therapists: No professional service corporation organized under this chapter shall engage in any business other than the rendering of the professional services for which it was incorporated.”
Morelli v. Ehsan, 756 P.2d 129 (Wash. 1988). “Additionally, under RCW 18.100.080, "[n]o professional service corporation .”
Columbia Physical Therapy v. Bfoa, 228 P.3d 1260 (Wash. 2010). · cites it 5× “Second, Columbia argues that RCW 18.100.080 prohibits BFOA's employment of physical therapists: No professional service corporation organized under this chapter shall engage in any business other than the rendering of the professional services for which it was incorporated.”
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