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Missouri Self-Employment Tax Calculator Tax Year 2026

Calculate your federal self-employment tax, income tax, and Missouri state tax on freelance income.

Missouri imposes a flat rate of 4.00% on individual income, which applies to your self-employment earnings on top of federal taxes. Missouri transitioned to a flat 4.00% rate in 2026, replacing its previous graduated system. The state offers a generous standard deduction of $15,750 single / $31,500 joint.

Use the calculator below to estimate your total tax burden as a self-employed Missouri resident for the 2026 tax year.

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20% deduction on qualified business income. Phase-out begins above $201,775 (single) / $403,550 (joint) for 2026.
Additional $6,000 deduction (OBBBA). Phases out at 6% above $75K single / $150K joint AGI.

New to the 2026 tax changes? Read our OBBBA guide →

0,000.

Real estate + personal property taxes. Combined with state income tax, the total counts toward the $40,400 SALT cap.
Mortgage interest, charitable contributions, medical expenses above 7.5% AGI. Do NOT include state/property tax.
Your Estimated Take-Home Pay
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Total Tax
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Effective Rate
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Quarterly Payment
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Monthly Set-Aside
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Effective Hourly
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Tax Breakdown

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Federal Income Tax Brackets

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Important: This calculator provides estimates for informational purposes only. It is not tax, legal, or financial advice. Your actual tax liability depends on deductions, credits, other income, and factors not captured here. Consult a qualified tax professional for your specific situation.

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Frequently Asked Questions: Missouri Freelancer Taxes

How is self-employment tax calculated in Missouri for 2026?

Self-employment tax is a federal 15.3% tax on 92.35% of your net self-employment earnings (12.4% Social Security up to $184,500 for 2026 + 2.9% Medicare with no cap). It is the same in every state. Missouri freelancers pay this on top of federal income tax and Missouri state income tax.

What state taxes do freelancers pay in Missouri?

As a freelancer in Missouri, you owe federal self-employment tax (15.3%), federal income tax, and Missouri state income tax on your net earnings. The exact state rate depends on your income level and filing status.

Do I need to make quarterly estimated tax payments in Missouri?

Yes, if you expect to owe $1,000 or more in federal taxes for 2026, you must make quarterly estimated payments to the IRS. Missouri also requires estimated payments if you expect to owe state tax above its threshold. The 2026 federal due dates are April 15, June 15, September 15, and January 15, 2027.

What deductions can Missouri freelancers claim in 2026?

Federal deductions for self-employed include the QBI deduction (up to 20% of qualified business income, made permanent under OBBBA), the deductible half of self-employment tax, self-employed health insurance premiums, retirement plan contributions (SEP IRA, Solo 401(k)), home office deduction, and ordinary business expenses. Missouri state-level deductions vary; consult a tax professional for state-specific items.

How This Calculator Works

  1. Self-employment tax: Net income × 92.35% × 15.3% (12.4% Social Security + 2.9% Medicare). Social Security capped at $184,500 for 2026.
  2. Half-SE deduction: 50% of SE tax deducted before income tax.
  3. QBI deduction: Up to 20% of qualified business income (OBBBA permanent).
  4. Federal income tax: 2026 progressive brackets after standard deduction and above-the-line deductions.
  5. State tax (Missouri): Applied to total income using Missouri’s 2026 rates.
  6. Quarterly payments: Total tax ÷ 4. Due: April 15, June 15, September 15, January 15.
Sources: Tax Foundation 2026 Federal · Tax Foundation 2026 State · IRS SE Tax Center

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