Updated October 8, 2026. Quick answer: Missouri’s 2026 withholding formula from the Department of Revenue taxes the first $1,348.00 of taxable income at 0%, then 2% to 4.5% in six steps of $1,348.00, and 4.7% above $9,436.00. The standard deduction is $16,100 for single filers, $24,150 for heads of household and $32,200 for a married filer whose spouse does not work.
The 2026 Missouri rates
| Missouri taxable income (after the standard deduction) | Rate |
|---|---|
| First $1,348.00 | 0% |
| Next six steps, each $1,348.00 wide, taken in order | 2%, 2.5%, 3%, 3.5%, 4%, then 4.5% |
| Over $9,436.00 | 4.7% |
The formula prints one table of rates for every filing status. The 2025 return’s tax rate chart uses the same eight steps with a top rate of 4.7%: “$256 plus 4.7% of the excess over $9,191”. The 2026 steps are slightly wider.
The 2026 standard deduction
| Status | 2026 amount |
|---|---|
| Single, or married filing separately | $16,100 |
| Head of household | $24,150 |
| Married and spouse does not work | $32,200 |
The formula lists “Single: $16,100” and “Head of Household: $24,150”. The $32,200 amount is a box on the Missouri W-4 for a married filer whose spouse does not work, not a separate filing status.
A worked example
As a computed example (an illustration, not a source figure), take $100,000 of Missouri taxable income. Accumulating from the lowest rate as the formula says, the tax is $4,519.37 (computed): the six $1,348.00 steps at 2% to 4.5%, plus 4.7% of the income above $9,436.00.
What this page does not say
No 2026 MO-1040 rate chart had been published, so the steps come from the 2026 withholding formula. The Missouri statute was not read and no personal exemption amount appears in the documents read.
Common mistakes
- Applying 4.7% to the first dollar. The first $1,348.00 is taxed at 0%.
- Treating the $32,200 amount as a filing status. It is a W-4 checkbox for a spouse who does not work.
- Using the 2025 chart’s $9,191 line on a 2026 return.
Related: how Missouri taxes retirement income, whether Missouri taxes pensions, how Missouri taxes capital gains, and the federal 2026 tax brackets.
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Answer againSources
- Missouri Department of Revenue, 2026 Withholding Formula: https://dor.mo.gov/forms/Withholding%20Formula_2026.pdf
- Missouri Department of Revenue, 2025 Form MO-1040 Instructions (Tax Rate Chart): https://dor.mo.gov/forms/MO-1040%20Instructions_2025.pdf
- Missouri Department of Revenue (where later updates appear; no figure on this page comes from it): https://dor.mo.gov/
Sources: the primary documents linked above, read on October 8, 2026. General information, not tax advice. Your own facts decide the outcome, and a preparer, the plan administrator or the agency itself is the right place to confirm anything consequential.