Updated October 7, 2026. Quick answer: Generally no, even for gain above the federal exclusion. Missouri starts from federal adjusted gross income and, from tax year 2025, the instructions say the state “allows a subtraction from your federal adjusted gross income for 100 percent” of capital gain reported federally, which RSMo 143.121 sets out as “one hundred percent of all income reported as a capital gain”.
Missouri tax on home sale profit at a glance
| Item | What the documents say |
|---|---|
| Profit on your main home | Starts from federal adjusted gross income, which excludes a gain excluded under section 121; the 2025 subtraction removes capital gain above it (no document read mentions section 121) |
| Rate on gain above the exclusion | Graduated, top bracket $256 plus 4.7% of the excess over $9,191 (2025 chart); capital gain is subtracted |
| Collected at the sale | None found in the documents read |
| Source | Missouri Department of Revenue; Missouri Revisor of Statutes |
What the Missouri documents say
The statute defines Missouri adjusted gross income for a resident as “resident individual shall be the taxpayer’s federal adjusted gross income” with listed modifications. Under the federal statute, “Gross income shall not include gain from the sale or exchange” of a principal residence that meets the ownership and use tests, so an excluded gain never enters federal adjusted gross income. That is reasoning from two documents. Neither document mentions section 121.
For tax years beginning on or after January 1, 2025 the statute subtracts “one hundred percent of all income reported as a capital gain”, and the 2025 instructions repeat it on Line 18, Capital Gain. A gain above the federal exclusion is reported as capital gain, so on the documents read it is subtracted as well. The top rate bracket in the 2025 chart is “$256 plus 4.7% of the excess over $9,191”.
What the federal exclusion requires
Most state answers start here. The statute says “Gross income shall not include gain from the sale or exchange” of property that, during the five years before the sale, you owned and used as your principal residence for periods adding up to two years or more. The limit is “shall not exceed $250,000”, or $500,000 for a husband and wife who make a joint return and meet the statute’s conditions. See CMG’s home sale taxes page and exclusion calculator.
A worked example at a $400,000 gain
An illustration, not a return: a married couple in Missouri sells their main home with a gain of $400,000 and meets the federal ownership and use tests. The gain is below the $500,000 joint exclusion, so it is not in federal adjusted gross income and, on the documents read, $0 is taxed by Missouri. As a second illustration, computed below, suppose the gain were $600,000. The amount above the exclusion would then be $100,000 that is reported as capital gain; on the documents read Missouri subtracts it under the 2025 rule, so $0 of it is taxed by Missouri as well.
What is collected at the sale
The documents read show no Missouri withholding, prepayment or seller-paid tax on a home sale. That is a gap in what was read, not a statement that none exists; ask the closing agent.
What changes in 2026
The documents read for Missouri announce no change for 2026 that is specific to the tax on a home sale. The forms and instructions read are for tax year 2025 or the newest page archived; check the state agency for 2026 forms when they are published.
What the documents do not say
- No document read mentions section 121, so conformity is reasoned from the federal starting point. The subtraction is read from the 2025 instructions and the current statute; whether it applies to a particular return depends on the filer’s facts. No 2026 form was archived.
Common mistakes
- Assuming Missouri taxes the gain above the federal exclusion at the bracket rates; the documents read subtract capital gain from tax year 2025.
- Relying on pre-2025 guidance; the subtraction applies to tax years beginning on or after January 1, 2025.
- Assuming the answer for one state applies to another, or that the state answer changes the federal tax on the sale.
Related: home sale taxes, state tax on home sale profit, how Missouri taxes capital gains, Missouri retirement taxes, and home sale exclusion calculator.
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Answer againSources
- Form MO-1040 Individual Income Tax Long Form Instructions 2025: https://dor.mo.gov/forms/MO-1040%20Instructions_2025.pdf
- RSMo Section 143.121 Missouri adjusted gross income: https://revisor.mo.gov/main/OneSection.aspx?section=143.121
- 26 U.S.C. 121, Exclusion of gain from sale of principal residence (U.S. Code, GovInfo): https://www.govinfo.gov/content/pkg/USCODE-2023-title26/html/USCODE-2023-title26-subtitleA-chap1-subchapB-partIII-sec121.htm
Sources: the primary documents linked above, read on October 7, 2026. General information, not tax advice. Your own facts decide the outcome, and a tax professional or the state agency itself is the right place to confirm anything consequential.