Missouri · 2027 and beyond
Missouri in 2027 and beyond: what is already law, and what is still open
Amendment 7 failed. The top rate is 4.7% for 2026 and is expected to stay there for 2027. What is on the 2026 return, what starts with tax year 2027, and what is scheduled or conditional after that.
By Charles Trautman, EA, editor
Need to Know Tax · written from Missouri Department of Revenue, Taxation Division sources and the unofficial November 3 election returns, November 12, 2026 · not yet reviewed by a Missouri practitioner
Amendment 7 failed. The top rate is 4.7% for 2026 and is expected to stay there for 2027. This page keeps apart three things that get mixed together in the news: what is on the 2026 return you file in early 2027, what begins with tax year 2027, and what is scheduled, conditional or still undecided after that. Election figures are the unofficial November 3, 2026 returns and are not final until the state certifies them.
What the voters decided on November 3, 2026
| Measure | Result | What it does |
|---|---|---|
| Amendment 7 | Rejected | Would have created the Show-Me Prosperity Fund, an endowment whose earnings could one day offset state taxes. About 60% no. |
| Amendment 5 (August 2026) | Rejected | Would have phased out the income tax and widened the sales tax. 83% no. |
Unofficial returns. Results become final when the state certifies them, usually by early December.
This return, next year, and later
| When | What applies |
|---|---|
| The 2026 return, filed in early 2027 | The top rate is 4.7%. |
| Capital gains are subtracted from Missouri income, as they have been since 2025; losses are not. | |
| The federal deductions taken after AGI do not reach the Missouri return. | |
| Starting with tax year 2027 | No cut is expected: the revenue trigger for another 0.1-point reduction was not met for the year ended June 30, 2026. The Department had not formally announced the 2027 rate. |
| 2028 and later, or conditional | The trigger is tested again each fiscal year. |
Items under 2027 and later do not change the 2026 return. They matter for 2027 withholding, estimated payments and planning. The detail behind each line is in the other Missouri articles.
The 2025 federal law and the Missouri return
Missouri starts its return from federal adjusted gross income. The new federal deductions reduce federal taxable income, not AGI, so they never arrive.
That is the reason a change on the federal return, such as the deductions for tips, overtime and people 65 and older, may or may not show up on the Missouri return. The federal side is in The new deductions for tips, overtime and seniors.
What to watch
The Department’s formal 2027 rate announcement and the 2027 session. When something on this page changes, the change is logged on the updates page with its date.
What to bring
- Your 2026 federal and Missouri returns, once filed, to set 2027 withholding and estimated payments against them
- Your last pay stub of 2026 and the first of 2027, to see whether withholding changed
- Any notice from the state about a 2027 rate, credit or filing change
Questions people ask
Does anything here change the Missouri return I file in early 2027?
Only what is listed under the 2026 return. Everything listed under 2027 or later affects withholding, estimated payments and planning, not the return for 2026.
Are the election results final?
Not yet. The figures on this page are the unofficial returns. The state certifies results in the weeks after the election, and this page will be corrected if anything changes.
How will I know if this page changes?
Every change is logged on the updates page with its date and the article it affects. State legislatures meet in early 2027 and some act before the filing deadline.
Missouri, after the election
Amendment 7 failed. The top rate is 4.7% for 2026 and is expected to stay there for 2027.
Written by Charles Trautman, EA, editor · Need to Know Tax, Lone Tree, Colorado
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Sources and where to check
- Missouri Department of Revenue: What’s New, individual income tax year changes
- Missouri Department of Revenue: 2026 Tax Legislative Changes
- Missouri Department of Revenue: 2026 Form MO-1040ES
- Missouri Department of Revenue: Capital Gains Subtraction FAQs
- Missouri Department of Revenue: Pension exemption FAQs
- Tax Foundation, How Tax Policy Fared on the Ballot in 2026 (unofficial results)