You live or work in Missouri — St. Louis, Kansas City, Columbia, or remote for a MO employer — and want state tax on RSU vest income beyond federal withholding. You may be comparing offers with Illinois, Kansas, or no-tax states.
Start here
What you need before using this
- MO residency and work location for year.
- confirmation and MO on pay stub.
- Missouri wage boxes.
- Missouri DOR guidance for the tax year.
- tax calculator with Missouri selected.
Missouri tax rules follow Missouri Department of Revenue guidance for the tax year.
Why this happens
Missouri treats compensation delivered as stock at like other wages for income tax.
Progressive MO brackets mean large vests on high salary hit higher marginal state rates.
Federal supplemental on vests is separate from MO state .
FICA applies on until Social Security wage base limits.
St. Louis and Kansas City tech, healthcare, and financial services employers generate planning questions.
Moving from MO to no-tax state mid-year triggers part-year MO return for pre-move income.
Moving into MO mid-year may tax post-move vests as MO resident income.
Remote MO resident for out-of-state employer still typically owes MO tax on wages as resident income.
Estimated MO tax may be needed when state on falls short.
Compare to Illinois and Kansas guides for border relocations.
Stock options and follow same MO wage treatment when MO-sourced.
Boxes 16–17 should include in MO wages when MO payroll applies.
Kansas City metro spans MO and KS — verify residency and work location for sourcing.
MO tax law changes — confirm brackets for filing year on official DOR site.
St. Louis earnings tax may apply to city residents and workers — verify current city rules separately from state.
What to check
- MO state line on pay stub.
- MO wage and tax boxes.
- in federal Box 1.
- MO estimate with all income.
- gap for MO plus federal.
- Move date if part-year MO resident.
- Kansas border commuter rules if applicable.
- St. Louis earnings tax if city resident or worker.
- Calculator output vs pay stub after .
Assuming Kansas City address means Kansas taxes your RSU vest
What to check in your documents
- MO pay stub state line.
- MO boxes.
- confirmation.
- MO estimated payment confirmations if made.
- Move or residency documentation if part-year.
St. Louis employee vesting before a Texas move
Illustration only, not your tax situation.
Questions people ask
- Does Missouri tax RSU vest income?
- Yes for typical MO residents on MO-sourced wages reported on .
- Missouri vs Kansas RSU tax?
- Both tax wages. KC metro cross-border rules depend on residency and work location — see current DOR guidance.
- MO RSU supplemental withholding?
- Employers may use MO supplemental methods on equity — may not match final on stacked income.
- Remote worker in Missouri RSU tax?
- MO resident generally owes MO tax on wages. Employer payroll sourcing should reflect residence.
- Part-year Missouri resident with RSUs?
- Vests while MO resident are generally MO-connected. Post-move vests follow new state rules.
- Which calculator for MO RSU?
- tax calculator with Missouri selected, gap, and move-between-states if relocating.
- W-2 MO boxes for RSU?
- State wage and tax boxes include when MO payroll reporting applies.
- FICA on Missouri RSU vest?
- Federal FICA on until wage base cap — same nationwide.
- Related rate page?
- See tax rate in Missouri for combined state federal FICA planning.
- When to ask a CPA?
- KC metro cross-border , St. Louis earnings tax, or part-year residency with large equity.
When to get help from a tax pro
- Part-year MO resident with equity from two states.
- Kansas City MO-KS cross-border with conflicting state boxes.
- St. Louis earnings tax on large .
- Comparing MO offer to Tennessee or Texas with heavy comp.
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 Move Between States Calculator
Rough scenario tool for RSU tax when you change states — not a legal sourcing allocation, but a planning starting point.
Related pages
- RSU Tax Rate in Missouri
Missouri applies progressive state income tax to RSU vest wages — federal marginal tax and FICA still apply on top.
- Illinois RSU Tax Guide
Illinois taxes RSU vest income as wages; part-year residency applies if you move in or out.
- Indiana RSU Tax Guide
Indiana taxes RSU vest wages; verify current IN DOR rates and county rules for your residence.
- 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.
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.
Missouri income tax on wages including equity compensation at vest.
- Missouri Department of Revenue — Individual Income Tax
Missouri Department of Revenue · Official
Missouri individual income tax overview and withholding guidance.
- IRS Publication 525 — Taxable and Nontaxable Income
Internal Revenue Service · Official
Covers compensation income from stock-based pay, including restricted property under section 83.
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.