Short answer: On $30,000 of 1099 profit, a single filer with no other income owes about $5,181 in 2026 federal tax: $4,239 of self-employment tax and $942 of income tax, about 17% of profit. Self-employment tax is 15.3% of 92.35% of your profit (IRS). More in Self-Employment Tax Explained: How the 15.3% Works in 2026.
Check our math
Here is the result above, step by step, using the numbers already filled in.
- Net profit (income minus business expenses)$30,000
- Share subject to self-employment tax$30,000 × 92.35% = $27,705
- Social Security part (12.4%)$27,705 × 12.4% = $3,435.42
- Medicare part (2.9%)$27,705 × 2.9% = $803.45
- Self-employment tax$3,435.42 + $803.45 = $4,239
- Half of it is deducted from income$30,000 − $2,119 = $27,881
- Standard deduction (single)$27,881 − $16,100 = $11,781
- 20% business income (QBI) deduction20% × $11,781 = $2,356
- Taxable income$11,781 − $2,356 = $9,424
- Federal income tax (2026 brackets)$942 (top bracket 10%)
- Total federal tax$4,239 + $942 = $5,181
- Each quarterly IRS payment$5,181 ÷ 4 = $1,295
Each step is rounded to the dollar for display; the calculator carries the cents through, so the totals match the result above.
How this calculator works
Self-employment tax is the Social Security and Medicare tax an employer would normally split with you. When you work for yourself you pay both halves: 12.4% for Social Security on earnings up to the $184,500 wage base, plus 2.9% for Medicare with no cap, applied to 92.35% of your net profit (IRS: Self-employment tax (Social Security and Medicare taxes)).
Income tax comes next. Half of your self-employment tax is deducted, then the 2026 standard deduction for your filing status ($16,100 single, $32,200 married filing jointly, $24,150 head of household) and the 20% qualified business income deduction. What's left runs through the 2026 federal brackets (IRS: 2026 tax inflation adjustments (brackets and standard deduction)).
Choose your state to add state income tax from its 2026 brackets. The result also shows each quarterly payment. If you expect to owe $1,000 or more for the year, the IRS generally expects estimated payments in April, June, September and January (IRS: Estimated taxes); see Quarterly Estimated Taxes: 2026–2027 Due Dates and How to Pay for this year's dates.
2026 federal tax on 1099 profit (single filer)
| Net profit | Self-employment tax | Income tax | Total | Set aside | Left after federal tax |
|---|---|---|---|---|---|
| $20,000 | $2,826 | $199 | $3,025 | 15% | $16,975 |
| $30,000 | $4,239 | $942 | $5,181 | 17% | $24,819 |
| $40,000 | $5,652 | $1,775 | $7,427 | 19% | $32,573 |
| $50,000 | $7,065 | $2,667 | $9,732 | 19% | $40,268 |
| $60,000 | $8,478 | $3,559 | $12,037 | 20% | $47,963 |
| $75,000 | $10,597 | $4,898 | $15,495 | 21% | $59,505 |
| $90,000 | $12,717 | $6,599 | $19,316 | 21% | $70,684 |
| $100,000 | $14,130 | $8,235 | $22,365 | 22% | $77,635 |
| $125,000 | $17,662 | $12,324 | $29,986 | 24% | $95,014 |
| $150,000 | $21,194 | $16,413 | $37,608 | 25% | $112,392 |
Single filer, no other income, standard deduction, 20% business income deduction, 2026 federal figures. No state tax.
Worked examples
Married couple, one freelancer
$60,000 of profit, filing jointly, no other household income.
| Result | |
|---|---|
| Self-employment tax | $8,478 |
| Federal income tax | $1,885 |
| Total, and each quarter | $10,363 · $2,591 |
Single parent
$45,000 of profit, filing as head of household.
| Result | |
|---|---|
| Self-employment tax | $6,358 |
| Federal income tax | $1,414 |
| Total, and each quarter | $7,772 · $1,943 |
Single, living in California
$85,000 of profit with state tax included.
| Result | |
|---|---|
| Federal (self-employment + income) | $17,800 |
| California income tax | $3,270 |
| Total, about 25% of profit | $21,070 |
Using your result
Turn the yearly total into two habits. First, move the "set aside" percentage of every payment into a separate savings account the day it arrives. Second, pay the quarterly amount before each IRS deadline from that account.
If your income changes during the year, update the profit and pay the new quarterly amount from then on. You can also base payments on last year's tax: paying 100% of last year's total tax (110% if your income was over $150,000) through the year generally avoids an underpayment penalty even if you owe more in April (IRS Publication 505).
What it doesn't cover
- It assumes this is your only income. If you also have a W-2 job, your bracket is higher and Social Security wages can lower your self-employment tax; the gig worker tax calculator has a field for other household income.
- It leaves out tax credits, itemized deductions, the 0.9% additional Medicare tax on high earners and local taxes.
- State tax uses 2026 brackets before credits; for married couples it's estimated from the single brackets.
- It's an estimate for planning, not a filed return.
Read more
- Self-Employment Tax Explained: How the 15.3% Works in 2026
- How Much Should You Set Aside for Taxes When You're Self-Employed?
- Quarterly Estimated Taxes: 2026–2027 Due Dates and How to Pay
Frequently asked questions
How much tax do I pay on $50,000 of 1099 income?
About $9,732 in 2026 federal tax if you're single with no other income: $7,065 of self-employment tax and $2,667 of income tax, roughly 19% of profit. State tax is extra.
How much tax do I pay on $100,000 of self-employment income?
About $22,365 federal for a single filer: $14,130 of self-employment tax and $8,235 of income tax, about 22% of profit.
Is self-employment tax on top of income tax?
Yes. You pay self-employment tax on your profit and income tax on your taxable income. Half of the self-employment tax is deducted before income tax is figured, which lowers the income tax a little.
Do I owe self-employment tax on a small side income?
You generally have to pay self-employment tax if your net earnings from self-employment are $400 or more for the year (IRS). Income tax applies to all of it either way.
When do I pay self-employment tax?
Through quarterly estimated payments if you expect to owe $1,000 or more, usually due in April, June, September and January, then on your yearly return. See Quarterly Estimated Taxes: 2026–2027 Due Dates and How to Pay.
Sources
- IRS: Self-employment tax (Social Security and Medicare taxes)
- IRS: 2026 tax inflation adjustments (brackets and standard deduction)
- IRS: Estimated taxes
- IRS Publication 505: Tax withholding and estimated tax
- Taxpayer Advocate Service: 2026 tax due dates
Reviewed against IRS sources: October 2026 · Updated October 2026 · By the NetTakeHome team. Estimates for planning, not tax, legal or financial advice.