How RSU Vests Are Taxed in Washington (2026)
Washington has no state income tax — so your vest is taxed federally + FICA only. But Washington does have a 7% long-term capital gains tax above $270K of LTCG per year, which catches a lot of Amazon, Microsoft, and Meta employees off guard when they sell shares from past vests.
Use the RSU Calculator to model your exact vest with Washington state withholding, FICA, and sell-to-cover analysis.
Open RSU Calculator →Washington is one of the simplest states for RSU vesting: there is no state income tax, no state supplemental withholding, and no state-level FICA add-on. Your employer withholds 22% federal flat (or 37% above $1M YTD), 6.2% Social Security up to $184,500, and 1.45% Medicare (plus 0.9% additional once you cross $200K).
The complication comes after the vest. Washington enacted a 7% long-term capital gains tax effective 2022, applied to LTCG above an annual exemption ($270,000 in 2024, indexed). Stock sales of RSU shares held more than one year past vest are subject to this — and for senior Amazon/Microsoft engineers selling vested grants from prior years, the 7% can apply to a meaningful slice of liquidity events. The tax does NOT apply to short-term sales (those get federal STCG only) and there is no 7% on the vest itself.
How Washington withholds on RSU vests
Total payroll withholding on a WA vest is just federal supplemental (22%) + FICA (~7.65–8.55% depending on YTD wages). For a senior IC at Amazon or Microsoft earning $250K base with a $200K vest, total withholding lands around 30%, while marginal federal+FICA liability is closer to 35–37%. The shortfall is smaller than CA/NY but still meaningful.
The 7% WA LTCG only triggers on share sales after 12+ months, and only on the gain (sale price minus FMV-at-vest cost basis). If you sell at vest under sell-to-cover, there is no LTCG and WA imposes nothing. If you hold and sell two years later for a $400K gain, the first $270K is exempt and the next $130K incurs $9,100 of WA LTCG on top of federal 15–20% LTCG + NIIT 3.8%.
- •0% state income tax on vest (W-2 income)
- •7% WA LTCG above $270,000 of net long-term gain (2024 threshold; check current year)
- •Charitable deduction up to $100K of qualifying donations against WA LTCG
- •Family-business and real estate sales are exempt from WA LTCG
- •No state withholding on vest — sell-to-cover only covers federal/FICA
RSU concentrations by Washington metro
Washington tech is dominated by two zip codes. Total comp in Seattle/Bellevue rivals SF Bay Area, with the no-state-income-tax kicker.
Amazon (huge RSU back-loaded vest schedule), Meta, Salesforce, Smartsheet, Zillow.
Microsoft headquarters concentration; T-Mobile Bellevue HQ; rapid Amazon Bellevue expansion.
Smaller tech footprint, mostly remote workers for Seattle-HQ employers.
Sample Washington RSU take-home
Federal 22% + FICA. No state tax. Numbers reflect a single filer.
| Scenario | Withheld | Actual Owed | Shortfall |
|---|---|---|---|
| $100K vest, $200K base | ~$30,000 | ~$33,000 | ~$3,000 |
| $300K vest, $250K base | ~$90,000 | ~$108,000 | ~$18,000 |
| $500K vest, $300K base | ~$150,000 | ~$190,000 | ~$40,000 |
Estimates assume single filer, standard deduction, no other supplemental wages. Real numbers vary by deductions, filing status, and 401(k) contributions. Run your own scenario →
Tactics that actually move the needle in Washington
- 1Sell at vest unless you have a strong concentration-risk reason to hold. The 7% WA LTCG only applies to held shares; same-day sales avoid it entirely.
- 2If you do hold and accumulate large gains, time sales across tax years to stay below the $270K WA LTCG exemption per year.
- 3Charitable giving against WA LTCG: up to $100K of qualified donations can offset WA LTCG dollar-for-dollar.
- 4Increase federal withholding on W-4 line 4(c) — without state tax to absorb the shortfall, your April federal balance can be the entire 10–15% gap.
- 5Max 401(k) ($24,500) and HSA — federal-only deduction but worth thousands.
- 6Cost basis tracking: after WA LTCG was enacted, brokerages may now report basis differently. Verify FMV-at-vest is in your 1099-B; adjust on Form 8949 if not.
- 7If you plan to relocate: WA LTCG is based on residency at the time of sale. Selling after a move to OR/CA/NY exposes the entire gain to that state instead.
Frequently asked questions
No — only to long-term capital gains from selling shares held more than 12 months after vest. The vest itself is W-2 ordinary income with zero state tax.
Yes, all of Washington is uniform — no income tax, same 7% LTCG threshold. Cross-border Vancouver/Portland workers should be careful: if you become an OR resident, OR taxes worldwide income at up to 9.9%.
Year 3 (20%) and Year 4 (60%) of the typical Amazon 5/15/40/40 schedule produce huge concentrated vest events. You will hit the $1M federal supplemental threshold (37% rate) faster than peers at evenly-vesting employers. Plan Q4 estimated payments accordingly.
Yes — WA estate tax kicks in above ~$2.193M (2024 exemption) and held RSUs/shares count toward the estate. This is a planning issue for wealth-transfer, not annual tax.
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