Yes. Missouri treats bonuses as taxable wages and requires Missouri income tax withholding on bonus and other supplemental wage payments. Missouri uses a progressive income tax system, but the state also provides specific guidance for handling supplemental wages such as bonuses.
When a bonus is paid, Missouri withholding may be handled using one of the methods allowed by the Missouri Department of Revenue. For supplemental wages paid separately from regular wages, employers may apply a flat withholding rate. You can use the calculator above, powered by Beyond HCM, to estimate Missouri withholding and take-home pay for bonus payments. The calculator uses a 2026 estimate based on Missouri withholding guidance and current payroll assumptions.
How to Calculate Bonus Tax in Missouri
Supplemental wages—including bonuses, commissions, overtime pay, back pay, and certain additional wage payments—are generally treated as wages for withholding purposes.
For Missouri withholding:
– Paid separately from regular wages: withholding may be calculated using a flat rate of 4.7% for supplemental wage payments in 2026
– Paid together with regular wages: withholding may be calculated on the total combined wages for the payroll period using Missouri withholding tables and the employee’s Form MO W-4 information
– Actual withholding may vary depending on payroll setup, employee elections, and withholding method used (flat-rate or aggregate method)
For federal withholding:
– 22% applies to most supplemental wages
– 37% applies to supplemental wages above $1 million in a calendar year
Key Information on Missouri Bonuses
How Are Bonuses Paid in Missouri?
Employers may issue bonuses through:
– Check
– Direct deposit
– Pay card
How Do Bonuses Work?
Bonuses are treated as taxable compensation. They are generally subject to:
– Federal income tax withholding
– Missouri income tax withholding
– Social Security tax
– Medicare tax
They are typically reported on the employee’s Form W-2 at year-end.
What Is the Missouri Bonus Tax Rate?
Missouri does not apply a unique standalone “bonus tax rate,” but it does allow employers to use a flat rate for supplemental wages.
For 2026, Missouri guidance allows:
– A flat supplemental withholding rate of approximately 4.7% when bonuses are paid separately from regular wages
– Alternatively, employers may use the aggregate method, combining bonus wages with regular wages and applying standard withholding tables
Because Missouri’s general tax system is progressive, the effective tax rate on a bonus may vary if the aggregate method is used.
Are Bonuses Taxed Differently Than Standard Pay?
At the Missouri level, bonuses are treated as taxable wages, but withholding may be calculated differently depending on how the bonus is processed.
For supplemental payments paid separately, Missouri allows a flat withholding percentage (such as 4.7%), which simplifies calculations compared to using full progressive tables.
At the federal level, bonuses may be taxed using the supplemental wage method, typically 22% when paid separately, subject to the higher $1 million rule.
How Much Tax Is Taken Out of a Bonus?
For most bonus payments in Missouri, estimated withholding may include:
– Missouri income tax withholding (commonly estimated at 4.7% for separate payments)
– 22% federal supplemental withholding in most cases
– FICA taxes, including Social Security and Medicare
Because Missouri allows multiple withholding methods, the exact amount taken from a bonus may vary depending on the employer’s approach and the employee’s tax elections.
Important
This calculator is provided for informational and estimation purposes only. Actual payroll tax withholdings may vary based on an employee’s tax elections, Form MO W-4 details, payroll setup, and whether the flat-rate or aggregate method is used. Employers should consult a qualified tax, legal, or payroll professional for official calculations.
If you need help with payroll processing, withholding setup, or tax compliance in Missouri, the Beyond HCM team is available to help.
Estimate only — not legal or tax advice. Need help managing Missouri payroll more confidently? Contact Beyond HCM for support.
