Washington vs California RSU Calculator
Side-by-side RSU tax comparison for Washington vs California — federal taxes still apply in both.
Rates and rules change. Content is reviewed for tax year 2026. Check the last-reviewed date and methodology on each page, then confirm against IRS or state guidance before you file.
Spot an outdated rate or date?
We update when we can, but we miss things. Send a link to the official source if you have one.
Email usIn plain terms
Planning estimate
Day-count split for planning only, not a legal sourcing call. State rules depend on facts your return may treat differently.
We do not pre-fill personal financial values. Estimates appear only after you enter your own numbers.
Enter your details to estimate
Add your equity, income, state, and withholding details to see an educational estimate. No personal financial values are pre-filled.
Start with the fields below.
Your details
Enter your own numbers below. This is an estimate, not a filing position.
Calculators pull rates from our tax-year files. For the most complete defaults, use 2025. Unloaded years ask you to enter rates yourself.
Gross vest value you want to compare across states.
Required to estimate
Prefilled with a flat estimate. Edit to match your situation.
Prefilled with a flat estimate. Edit to match your situation.
Applied to both states, e.g, a city income tax.
Defaults to the full amount when left blank. Lower it if only part of the income is sourced to these states.
Results will appear here once you enter the required details on the left.
Related guides
- RSU Taxes When Moving States
Moving mid-year can mean more than one state has a claim on part of your compensation — planning beats guessing.
- Remote Work and RSU State Taxes
Remote work can create multi-state tax questions — your home state, employer state, and vest timing all matter.
- California RSU Tax Guide
California taxes RSU vest income as wages; withholding and bracket stacking deserve extra attention here.
- RSU Move Between States Calculator
Rough scenario tool for RSU tax when you change states — not a legal sourcing allocation, but a planning starting point.
How the tax works
Washington does not impose a broad personal income tax on wages.
California taxes income as wages, often at a high .
Federal income tax and payroll taxes are the same in both states.
A move does not erase California's claim on equity earned while you lived or worked there.
What to check on your end
- That federal and payroll taxes are equal across the comparison.
- California's on the for the state-side difference.
- Whether part of the equity was earned during a California period.
- Whether local taxes apply (generally not a Washington wage income tax).
- California guidance or a professional for real moves.
Common mistake
Example scenario (hypothetical)
Illustration only, not your tax situation.
When a CPA is worth it
- You are planning a California-to-Washington move.
- Equity was earned across both states.
- You kept a California employer remotely.
- You want full bracket math, not a flat estimate.
Sources and notes
Primary tax claims on this page are supported by the official and secondary sources below. Broker and software links describe reporting mechanics — confirm rules against IRS or state guidance.
Calculator outputs are planning estimates with labeled assumptions — not a filing position.
- IRS Publication 15 (Circular E) — Supplemental wages
Internal Revenue Service · Official
Section 7 describes supplemental wage withholding, including the optional 22% flat rate and 37% rate above $1 million of supplemental wages in a calendar year.
- IRS Tax Withholding Estimator
Internal Revenue Service · Official
Tool to estimate whether paycheck withholding (including supplemental events) will cover annual tax liability.
Related calculators
Related pages
- California to Washington RSU Tax Guide
Washington has no state income tax on wages, but California may still tax income earned while you were a resident.
- Washington RSU Tax Guide
Washington does not tax wage income at the state level, but federal tax and payroll taxes still apply on RSU vests.
- California RSU Tax Guide
California taxes RSU vest income as wages; withholding and bracket stacking deserve extra attention here.
For learning, not filing
VestingTax.com is not a CPA firm or tax preparer. Grants, employers, and states all differ. Use the cited IRS and state sources above, your own documents, and a qualified tax professional before you make decisions from this guide.