Missouri Self-Employment Tax Calculator (2026)
Federal self-employment tax, federal income tax and Missouri state income tax on 1099 income, plus the quarterly estimated payment to set aside.
- Total tax
- $16,302
- Effective rate
- 22.6%
- Per quarter
- $4,075
- After-tax income
- $55,698
| Breakdown | |
|---|---|
| Net profit (income − expenses) | $72,000 |
| Self-employment tax | $10,173 |
| Social Security (12.4%) | $8,245 |
| Medicare (2.9%) | $1,928 |
| Federal income tax | $4,630 |
| Adjusted gross income | $66,913 |
| Standard deduction | −$16,100 |
| Qualified business income deduction (20%) | −$10,163 |
| Taxable income · marginal rate 12.0% | $40,651 |
| Missouri income tax | $1,498 |
| Total federal + state | $16,302 |
Estimated payments of $4,075 are due Apr 15, 2026, Jun 15, 2026, Sep 15, 2026, Jan 15, 2027.
How the 2026 numbers are calculated
- Net profit is your 1099 income minus deductible business expenses (Schedule C).
- Self-employment tax is 15.3% of 92.35% of net profit: 12.4% Social Security on the first $184,500 of combined wages and net earnings, plus 2.9% Medicare on all of it. An extra 0.9% Medicare tax applies above $200,000 ($250,000 married filing jointly).
- Adjusted gross income is net profit plus any W-2 wages, minus half of the self-employment tax.
- The standard deduction ($16,100 single, $32,200 married filing jointly, $24,150 head of household) and the 20% qualified business income deduction reduce taxable income. The QBI deduction starts phasing out above $201,750 of taxable income ($403,500 joint).
- Federal income tax is applied to what is left using the 2026 brackets for your filing status.
- The child tax credit ($2,200 per child under 17, $500 per other dependent) reduces income tax; up to $1,700 per child is refundable and can offset self-employment tax.
- The earned income credit for filers with children — up to $4,427 with one child, $7,316 with two, $8,231 with three or more — is fully refundable and phases out above $23,890 of income ($31,160 joint).
- Missouri income tax: calculated under the state's own rules, described below.
Missouri and self-employment income
Missouri's rate chart tops out at 4.7% above about $9,200 of taxable income (indexed each year), and the standard deduction matches the federal one. Two Missouri-only breaks matter for freelancers: 20% of net business profit is deducted before anything else, and a share of federal income tax (35% at the lowest incomes, falling to nothing above $125,000 of Missouri income) is deductible up to $5,000 ($10,000 on a joint return). There is no dependent deduction on the Missouri return; head-of-household filers get a $1,400 exemption. Joint filers are taxed on each spouse's income separately, which this calculator approximates as a single earner.
Missouri rules used by this calculator (2026)
- Missouri applies 7 brackets from 2% to 4.7% on income above $1,348 for 2026.
- Standard deduction: $16,100 single, $32,200 married filing jointly, $24,150 head of household.
- 20% of net business profit is deducted from state income.
- Deductible: a share of federal income tax (35% at the lowest incomes, falling to 0%), up to $5,000 single / $10,000 joint.
- Each filer gets a personal exemption that depends on income.
- Missouri's earned income credit is 20% of the federal credit, nonrefundable; the calculator applies it.
- Missouri starts from federal AGI, so the deductible half of self-employment tax reduces state income as well.
- Residents of Kansas City and St. Louis also owe a 1% city earnings tax on wages and on self-employment net profit; it is not included here.
What a Missouri freelancer may still owe
- Missouri requires estimated payments (Form MO-1040ES) when you expect to owe $100 or more.
- Kansas City and St. Louis levy a 1% earnings tax that applies to self-employment net profit earned in the city; it is not included here. Applied here: the Missouri working family tax credit (20% of the federal earned income credit, against the tax, taken last).
Quarterly estimated tax deadlines (2026)
If you expect to owe $1,000 or more of federal tax for the year, the IRS expects four estimated payments (Form 1040-ES). Missouri runs its own estimated-payment schedule with its own threshold (see above); the calculator's per-quarter figure combines federal and state so you can set aside one amount.
- Federal payment 1: April 15, 2026
- Federal payment 2: June 15, 2026
- Federal payment 3: September 15, 2026
- Federal payment 4: January 15, 2027
The calculator splits your total into four equal payments. To avoid an underpayment penalty you can instead pay 100% of last year's total tax (110% if your prior-year AGI was over $150,000) spread across the four dates.
Common questions
Does Missouri tax self-employment income differently from wages?
For state income tax, net profit from self-employment is ordinary income like wages. The self-employment tax itself is federal only; Missouri does not add a state equivalent.
Is half of self-employment tax really deductible?
Yes, for federal tax. The employer-equivalent half is an adjustment to income on Schedule 1, which lowers your AGI and therefore your federal income tax. It does not reduce the self-employment tax itself.
Does an LLC change these numbers?
A single-member LLC taxed as a sole proprietorship pays exactly what this calculator shows. Electing S-corporation status changes the math (salary plus distributions) and is outside this tool's scope.
What if I moved to Missouri during the year?
Income earned while you were a resident of another state is taxable there under that state's rules. This calculator assumes all income was earned as a Missouri resident.
Data sources and status
Federal figures for 2026: verified · last verified 2026-09-05
- IRS Rev. Proc. 2025-32 (2026 inflation adjustments, incorporating OBBBA changes)
- SSA 2026 COLA fact sheet — Social Security wage base
- 26 U.S.C. §199A as amended by Public Law 119-21 — QBI phase-in range widened to $75,000 / $150,000
- 26 U.S.C. §24 as amended by Public Law 119-21 — CTC $2,200, indexed from 2026
- IRS Form 1040-ES (2026) — estimated tax due dates
- IRS Rev. Proc. 2025-32 §4.06 — earned income credit amounts and §32(i) investment income limit
- IRC §6654(d)(1)(B)–(C), (e)(1) and (f) (required annual payment: lesser of 90% of the current year's tax or 100% of the prior year's, 110% when prior-year AGI exceeds $150,000 / $75,000 MFS; no penalty when the tax less withholding is under $1,000; 'tax' = income tax + SE tax less credits other than withholding), read at law.cornell.edu; Form 1040-ES instructions, 'Who Must Pay Estimated Tax' and the Estimated Tax Worksheet
Missouri figures for 2026: verified · last verified 2026-09-08
- Missouri Department of Revenue — 2026 Form MO-1040ES instructions: 2026 tax rate chart (0% to $1,348, then $1,348 steps, $263 plus 4.7% over $9,436; examples: taxable $4,000 → $60, $12,300 → $398), standard deduction $16,100 / $32,200 / $24,150 / $16,100
- Missouri Department of Revenue — 2026 employer withholding formula (same chart and top rate; the SB 3 revenue trigger did not lower the 2026 rate), and the Department's 2026 legislative-changes summary (no individual rate or deduction changes)
- RSMo 143.011, 143.022, 143.171 (unchanged for 2026); 2025 Form MO-A line 17 and MO-1040 lines 9–15 for the deduction mechanics, which are not indexed
- Missouri Department of Revenue — 2025 Form MO-WFTC and MO-1040 instructions line 44: working family tax credit of 20% of the federal earned income credit (Form 1040 line 27a), nonrefundable, no carryforward, limited to the tax after all other credits; RSMo §143.177 (20% for tax years 2024 and after, the statutory maximum); DOR FAQ