Plumber Salary in Washington (2026)

The 2025 OBBBA No-Tax-on-Overtime federal deduction is the headline tax change for WA plumbers. For 2025-2028, qualifying FLSA-required OT premium (the 'half' of time-and-a-half) is deductible above-the-line federally — cap $12,500 single / $25,000 MFJ. Phaseout starts at $150K MAGI single / $300K MFJ at $100 per $1,000, fully phased out at $275K / $550K. Most WA journeymen fall under the phaseout threshold and capture the full deduction.

For a WA union journeyman at $58/hour running 50-hour weeks × 48 weeks, OT totals ~480 hours/year at $87/hour. The premium portion (the 'half') is $13,920/yr — over the $12,500 single cap. Most union journeymen qualify for the full cap. At the 22% federal bracket plus WA 0%, that's roughly $2,750 federal savings/yr through 2028 — $11,000 cumulative across four OBBBA years.

WA conforms to federal AGI but charges 0% state income tax — the OBBBA OT deduction flows through cleanly with no state-level add-back or pickup. This is mechanically cleaner than CA, OR, NY, or other state-income-tax states where OBBBA conformity must be tracked.

WA Minimum Wage Act (RCW 49.46) governs WA OT — federal FLSA 40/week threshold applies. WA does NOT have a daily OT trigger (unlike CA's 8-hr or CO's 12-hr rules). Prevailing wage on public works (RCW 39.12) sets minimum wage and benefits on state-funded projects — typically 1.5× for OT plus apprentice ratios. Sound Transit ST3, WSDOT, Seattle Public Utilities, federal facilities all carry prevailing wage requirements.

WA Cares Fund (RCW 50B.04) charges 0.58% on wage income up to the federal SS wage base ($184,500 in 2026, capped at $1,070/yr). WA Paid Family Medical Leave (RCW 50A) adds ~0.74% combined (employee share ~$540/yr at SS wage base cap). Combined WA payroll on plumber wages runs roughly $1,600-1,700/yr — modest relative to comp.

WA Puget Sound construction cycle has been sustained since 2020 — Sound Transit ST3 station + corridor build, Microsoft Redmond East Campus expansion (~3M sq ft through 2028), Amazon Bellevue Towers, Climate Pledge Arena (completed 2021), Lumen Field + T-Mobile Park capital work, Boeing 777X plumbing at Everett, plus the Eastern WA data center build through 2030+. Federal IIJA infrastructure plus DOE Hanford cleanup plus Seattle Public Utilities LSL replacement drive sustained demand.

Union vs non-union: UA Local 32 Seattle runs commercial scale ($58-82/hour journeyman plus benefits + pension), UA Local 26 Tacoma serves South Sound, UA Local 290 Oregon covers Boardman / Umatilla cross-Columbia. Non-union service plumbing (Roto-Rooter, Best, South West, Beacon Plumbing) pays commission structures rather than hourly union scale. Resort-town premium (Methow Valley / Leavenworth / Olympic Peninsula) pays 20-30% above Seattle due to labor scarcity.

Seattle / Bellevue commercial plumbing is dominated by sustained construction. Microsoft Redmond East Campus (~3M sq ft through 2028), Amazon Bellevue Towers, Sound Transit ST3 station infrastructure, plus the post-2020 SLU / Bellevue high-rise pipeline. UA Local 32 apprenticeship produces ~120-150 journeymen/year — not enough to keep up with demand. Residential service demand keeps the non-union segment hopping.

Eastern WA hyperscale data center pipefitting is the WA growth specialty. Microsoft Quincy 3M sq ft + Yahoo + Verizon + Vantage + NTT + Dell Quincy plus Microsoft Moses Lake plus Amazon Boardman / Umatilla OR (cross-Columbia, supplied by UA Local 290 Oregon). Per-diem stipends $150-350/day for Seattle-based pipefitters are standard. Senior chilled-water plant pipefitters clear $175-235K annual with sustained OT.

Federal-cleared work is the WA plumbing specialty that doesn't exist at this depth in most states. JBLM Madigan, VA Puget Sound (Seattle + American Lake), Hanford nuclear cleanup (Bechtel + ENW + CH2M HILL), NOAA Seattle, plus Boeing Defense Tukwila (P-8 + KC-46 + classified) all maintain ongoing capital programs requiring cleared plumbers. TS/SCI clearance adds $15-30K premium plus job security through contracting cycles.

Marine + aerospace specialty rounds out WA plumbing niches. Port of Seattle + Port of Tacoma marine, Holland America Line Seattle homeport plus US-flagged drydock, NOAA's Pacific fleet, plus WA State Ferries (24-vessel fleet). Aerospace at Boeing Renton (737 water systems), Everett (777X), Defense Tukwila (P-8 + KC-46 fuel-system specialty) adds technical depth. Both specialties require additional certifications beyond standard plumbing license.

WA plumbing careers typically start with UA Local 32 Seattle 5-yr apprenticeship (~50-70 new apprentices/year), UA Local 26 Tacoma, or non-union ABC / private-shop training. WA L&I-registered programs combine 8,000 jobsite hours + 1,000+ classroom hours over 5 years. Apprentice pay $42-78K rising ~5-8%/yr. WA plumbing license requires passing the WA L&I plumber exam at year 5.

Journeyman plumber (years 5-10): comp $95-155K cash + benefits + pension contributions. UA Local 32 commercial scale $58-82/hour plus health + retirement benefits + apprenticeship dues. Sustained OT during construction-busy seasons routinely pushes total comp to $120-175K. Specialty fork at year 7-8 between commercial / industrial pipefitting / data center / federal-cleared / residential service.

Master plumber / foreman (years 10-18): comp $115-195K. WA L&I master plumber exam at year 7-10. Master license opens foreman / superintendent / service-manager career path plus shop-ownership eligibility. Senior pipefitters specializing in data center chilled-water work or federal-cleared facilities clear $175-235K annual with sustained OT.

Owner-operator / senior specialty (years 18+): independent shop ownership $145-385K combined cash + S-corp distribution + practice equity. WA plumbing shop valuations 3-5x SDE in 2024-25 (down from 5-7x peak 2020-22). Senior service plumbers with master license + 15+ yrs experience + loyal customer base routinely build $1.5-3M+ shop equity. WA's 0% income tax keeps accumulated distributions tax-efficient throughout career.