Your Missouri RSU vest pay stub shows state withholding but you work in Kansas City or live in St. Louis and are not sure whether city earnings tax or cross-state metro rules change what you owe on equity compensation.
In plain terms
Gather before you start
- 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.
How the tax works
Missouri treats compensation delivered as stock at like any other wages for state income tax. When shares deliver, payroll reports in Box 1 federally and in Missouri wage boxes when MO payroll applies. are wages at , and Missouri taxes them under progressive state brackets.
The Kansas City metro spans Missouri and Kansas — residency and where you physically work determine sourcing, not the metro name on your address. A Missouri resident working on the Missouri side of the metro generally owes Missouri tax on MO-sourced wages; cross-border commuters should verify current DOR guidance rather than assuming a Kansas paycheck eliminates Missouri tax on for a Missouri resident.
St. Louis imposes a 1% earnings tax on wages for city residents and for people who work in the city, including when you meet those rules — that is separate from Missouri state income tax and easy to miss when planning a large . Federal supplemental and FICA apply on nationwide, with FICA running until the Social Security wage base.
St. Louis and Kansas City tech, healthcare, and financial services employers generate planning questions across the state. Moving from Missouri to a no-tax state mid-year triggers a part-year Missouri return for pre-move connected income. Remote Missouri residents working for out-of-state employers still typically owe Missouri tax on wages as resident income.
When state on a falls short of your true — especially with St. Louis earnings tax in the mix — estimated Missouri tax may be needed alongside any federal gap. Stock options and follow the same Missouri wage treatment when Missouri-sourced. Compare Illinois and Kansas guides for border relocations with heavy equity compensation.
What to check on your end
- 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.
2 more checklist items
- 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 pull from your files
- 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 in the KC metro?
- Both tax wages. KC metro cross-border rules depend on residency and work location — see current DOR guidance.
- Does St. Louis earnings tax apply to RSU vests?
- The 1% St. Louis earnings tax may apply to wages for city residents and city workers — verify current city rules separately from state tax.
- MO RSU supplemental withholding — why is it too low?
- Supplemental methods on equity may not match final when salary, vests, and city tax stack.
- Part-year Missouri resident with RSUs?
- Vests while MO resident are generally MO-connected. Post-move vests follow new state rules.
When a CPA is worth it
- 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.
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.
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.
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.