Missouri Capital Gains Tax Calculator

Missouri taxes capital gains as ordinary income under a graduated progressive bracket schedule, with marginal statutory rates ranging from 1.50% up to a top marginal rate of 4.70%.

Capital gains get evaluated alongside other taxable earnings across Missouri's progressive tax brackets. When gains are recognized on top of baseline salary or business income, they're taxed at the taxpayer's top marginal bracket rate, reaching up to 4.70%.

Missouri taxes a capital gain as ordinary income on a schedule with eight narrow bands that top out at 4.7% above $8,911 of taxable income. The bands below that are so small that the graduation almost never survives contact with a real salary; most filers see a flat 4.7% on the gain.

The gain is stacked on top of your other income and walked through the bands from there.

Step by step, with your numbers:

1. Start with the net gain. Capital losses and loss carryforwards are netted against the gain before anything else happens.
2. Stack the gain on your other income. Ordinary income fills the lower brackets first and the gain sits on top of it, so the gain is taxed at whatever rates are still open above your salary. The same gain costs a high earner more than it costs a low earner. Enter other income as a taxable-income figure: the calculator does not subtract a standard deduction or personal exemption for you.
3. Walk the brackets. The slice of the gain that falls in each band is multiplied by that band's rate, and the pieces are added together.
4. Effective rate. Total Missouri tax divided by the whole realized gain. On a graduated schedule this sits below the top marginal rate, because the lower slices were taxed at lower rates.
5. Net proceeds. Subtract the state tax from the gain to get what you keep before federal tax.

Consider an investor in Missouri who realizes $100,000 in capital gains on top of $75,000 in baseline ordinary income for the year.

1. Stack the income. Missouri taxes capital gains as ordinary income. Since income fills the lower brackets first, the $75,000 of baseline income already occupies the lower tiers, so the $100,000 gain stacks on top and pushes into higher brackets.
2. Apply the marginal brackets. Working through Missouri's bracket schedule, each slice of the gain is taxed at its own bracket's rate, with the highest slice reaching the 4.70% top marginal bracket.
3. Total state tax due. Summing the tax owed across every bracket the gain touches produces a total Missouri state tax liability of $4,700.00.
4. Effective rate. Because the $75,000 of other income already fills the brackets below Missouri's top rate, the entire gain lands in the 4.70% bracket, so the effective rate on the gain equals the marginal rate: 4.70%.
5. Net proceeds. After paying $4,700.00 in state tax, the investor keeps $95,300.00 of the $100,000 gain, before any federal tax applies.

Missouri packs eight bands into the first $9,436 of taxable income. For anyone with a salary, that whole structure is already spent before a capital gain is reached, and the sweep flattens to a single rate. The interesting walk here is on the other-income axis, not the gain axis.

The threshold walk. With the calculator's default $75,000 of other income the entire schedule below 4.70% is consumed, and the engine returns $4,700.00 on a $100,000 gain at a flat 4.70% effective rate with a 4.70% marginal rate. Drop other income to zero and the bands reappear: the same $100,000 gain computes to $4,519.37, an effective 4.52%. The whole eight-bracket apparatus is worth exactly $180.63 on a $100,000 gain, and only to a filer with no other income at all. Drop the gain instead: at $5,000 with no other income the tax is $89.34 at a 3.00% marginal rate, at $9,436 it is $262.86 at 4.50%, and at $10,000 it is $289.37 with the marginal rate now at 4.70%.

The marginal cost of the next unit. Above $9,436 of total income, each additional $1,000 of gain costs $47.00 and never costs anything else. The engine returns $4,700.00 at a $100,000 gain and $4,747.00 at $101,000, and $23,500.00 on the $500,000 scenario. Below $9,436 the cost per $1,000 climbs in $5.00 steps from $0.00 to $47.00, but the whole climb is over inside the first $9,436.

The reverse question. How much gain can be realised before hitting the top rate? On zero other income, $9,436, which the engine taxes at $262.86. On $5,000 of other income, $4,436. On the default $75,000, none: the top band is already reached before the first dollar of gain. Splitting a disposition across tax years recovers at most $180.63 per year in Missouri, which is why the bracket-timing strategies that matter in Maryland do not repay the effort here.

Filing status does not move the sweep. A $100,000 gain on $75,000 of other income computes to $4,700.00 single and $4,700.00 married filing jointly. Missouri publishes one rate chart for all statuses and does not double the bracket widths; each spouse applies the same chart to their own taxable income on a combined return, which the engine does not split.

Two omissions that matter more than the brackets do. Missouri enacted a capital gains subtraction in 2025 that is not applied anywhere in this code path, so a gain eligible for it would owe less than the $4,700.00 shown. Kansas City and St. Louis each levy a 1% earnings tax, and no city rate exists in this calculator. For a St. Louis resident the local layer alone would be a further $1,000 on the baseline gain, roughly a fifth again on top of the state figure.

While this calculator provides penny-exact state statutory modeling, additional federal and transactional complexities warrant supplementary review: - Married-Filing-Jointly Brackets: This calculator applies the single-filer schedule to every filing status. Missouri is understood to use one bracket schedule for all filing statuses, which would make that correct, but the Missouri Department of Revenue and the state revisor both refuse automated access and this could not be confirmed against a primary source. - Federal Capital Gains Taxes: Federal long-term brackets (0%, 15%, 20%) and short-term ordinary rates up to 37% under IRC § 1. - Net Investment Income Tax (NIIT): The 3.8% surtax on net investment income under IRC § 1411 for single filers over $200,000 (married joint over $250,000). - Alternative Minimum Tax (AMT): Federal AMT calculations under IRC § 55 impacting incentive stock option (ISO) exercise spread. - Section 1031 Like-Kind Exchanges: Tax deferral mechanisms for real property held for productive use in trade, business, or investment. - Qualified Small Business Stock (QSBS): Federal Section 1202 gain exclusions where state conformity varies significantly.

• Assuming Federal Rate Parity: Most states do not offer preferential long-term capital gains rates; gains are taxed at standard ordinary income rates.
• Failing to Track Holding Periods: Short-term gains (assets held ≤1 year) generate higher federal tax liabilities even if state rates treat both holding periods identically.
• Underestimating Multi-State Apportionment: Selling real estate or business assets located in other jurisdictions triggers multi-state non-resident return filing obligations.
• Neglecting Underpayment Penalties: Substantial one-time liquidity events require prompt estimated tax payments within the quarter of sale to avoid statutory penalties.
• Mismatched Cost Basis Records: Failure to document reinvested dividends, stock splits, or structural return-of-capital distributions leads to inflated taxable gain calculations.

• Internal Revenue Service (IRS): Publication 544 (Sales and Other Dispositions of Assets) and Publication 550 (Investment Income and Expenses). irs.gov/publications/p544

Also consulted: Missouri Department of Revenue: 2026 Statutory Individual Income Tax Rate Schedules.