Your Phoenix-area vest pay stub shows Arizona withholding but federal supplemental still left a gap — or you are comparing an Arizona semiconductor offer to California and want the real combined hit on vest FMV, not a stale flat percentage from an old blog.
In plain terms
Gather before you start
- AZ residency for year.
- confirmation and AZ on pay stub.
- AZ wage boxes.
- Arizona DOR rate guidance for filing year.
- tax calculator with Arizona selected.
How the tax works
Searches for an tax rate in Arizona usually mean you want one percentage to plan cash for a . Arizona applies a flat state income tax rate to taxable income including wages per Arizona DOR guidance for your filing year — simpler than progressive states like California, but still stacked on top of federal tax and FICA.
Federal progressive income tax and FICA apply separately on . FICA runs nationwide on wages with Social Security stopping at the annual wage base and Medicare applying to the full amount. Employer supplemental on equity often uses flat federal methods that can under- compared with your true stacked on salary plus .
Phoenix metro and the semiconductor corridor — Chandler, Tempe, Scottsdale, and the East Valley — are where most Arizona planning questions come up. Employees moving from California to Arizona often compare Arizona's flat state layer to California's progressive rates. Post-move vests as an Arizona resident follow Arizona rules; pre-move vests may remain connected to the prior state.
Moving from Arizona to Texas mid-year triggers a part-year Arizona return on pre-move connected income. Remote AZ residents working for out-of-state employers still typically owe Arizona tax on wages as resident income. Estimated federal tax may be needed even when Arizona flat state is accurate at the state layer.
The practical planning number is a combined estimate: Arizona flat state rate per current DOR publications times estimated taxable income, plus federal plus remaining FICA on the . Use the Arizona tax guide for mechanism detail and the tax calculator with Arizona selected for a stacked-income estimate.
What to check on your end
- AZ state on pay stub.
- AZ wage and tax boxes.
- Federal Box 1 and .
- AZ tax estimate with total income for filing year.
- Federal gap vs .
- Move date if part-year AZ.
- Calculator output vs pay stub.
1 more checklist item
- Arizona DOR pub for current year.
Comparing Arizona to California using only state rate without federal stacking
What to pull from your files
- AZ pay stub.
- AZ boxes.
- confirmation.
- AZ estimated tax if made.
- Move docs if part-year.
Phoenix employee with cliff vest
Illustration only, not your tax situation.
Questions people ask
- What is the RSU tax rate in Arizona?
- AZ flat state rate on wages plus federal marginal tax plus FICA — check Arizona DOR publications for the current flat rate for your filing year.
- Are RSUs taxed in Arizona?
- Yes for typical AZ residents on AZ-sourced wages.
- Arizona vs California RSU tax rate?
- Both tax wages. Arizona uses a flat state rate per DOR guidance; California uses progressive brackets — see both state rate pages.
- AZ RSU supplemental withholding?
- Employers AZ and federal on — federal supplemental may still under- vs .
- Moved from Arizona to Texas?
- AZ may tax pre-move connected income. Post-move TX vests avoid TX state income tax for typical residents.
When a CPA is worth it
- Part-year AZ resident with large equity income.
- Employer withheld wrong state on AZ resident .
- Multi-state remote work allocation.
- Offer comparison AZ vs CA with identical grant.
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.
Arizona income tax on vest wages; confirm current AZ DOR rate.
- Arizona DOR — Individual Income Tax
Arizona Department of Revenue · Official
Arizona individual income tax rules and current rate information.
- IRS Publication 525 — Taxable and Nontaxable Income
Internal Revenue Service · Official
Covers compensation income from stock-based pay, including restricted property under section 83.
Related calculators
- RSU Tax Calculator
Model federal and state taxes on your RSU vest, compare withholding to estimated tax, and see what you may keep.
- RSU Withholding Gap Calculator
Focus on the gap between what your employer withholds on RSU vests and what you may owe when everything is reconciled.
- RSU State Tax Comparison Calculator
Run the same RSU vest through different state assumptions to see how location may change estimated tax.
Related pages
- Arizona RSU Tax Guide
Arizona taxes RSU vest wages; compare offers with California and Texas using state tax tools.
- RSU Tax Rate in California
California adds progressive state tax on RSU vest FMV — effective rate is CA plus federal plus FICA, not one flat RSU percentage.
- RSU Tax Rate in Texas
Texas has no state income tax on RSU vests — effective rate is federal plus FICA, not a published Texas RSU percentage.
- 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.
- RSU Effective Tax Rate Explained
There is no flat RSU tax rate — effective tax on vest FMV includes federal, FICA, and state components that change with your total income.
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.