2026 tax and quarterly payments.
2026 IRS figures (Rev. Proc. 2025-32). Standard deduction, no credits or other income; a sole proprietor with no employees.
Example: On $60,000 of 2026 profit, single: self-employment tax is $8,477.73, $4,238.87 of it deductible. After the $16,100 standard deduction and a $7,932.23 QBI deduction, taxable income is $31,728.91 and income tax $3,559.47: $12,037.20 in all, or $2,708.37 a quarter.
Taxable income, after the standard deduction. Rev. Proc. 2025-32
| Rate | Single | Married filing jointly | Married filing separately | Head of household |
|---|---|---|---|---|
| 10% | $0 – $12,400 | $0 – $24,800 | $0 – $12,400 | $0 – $17,700 |
| 12% | $12,401 – $50,400 | $24,801 – $100,800 | $12,401 – $50,400 | $17,701 – $67,450 |
| 22% | $50,401 – $105,700 | $100,801 – $211,400 | $50,401 – $105,700 | $67,451 – $105,700 |
| 24% | $105,701 – $201,775 | $211,401 – $403,550 | $105,701 – $201,775 | $105,701 – $201,750 |
| 32% | $201,776 – $256,225 | $403,551 – $512,450 | $201,776 – $256,225 | $201,751 – $256,200 |
| 35% | $256,226 – $640,600 | $512,451 – $768,700 | $256,226 – $384,350 | $256,201 – $640,600 |
| 37% | over $640,600 | over $768,700 | over $384,350 | over $640,600 |
| Standard deduction | $16,100 | $32,200 | $16,100 | $24,150 |
Your 2026 self-employment tax and income tax on 1099 profit, worked out the way the return does it (brackets, standard deduction, QBI), and the safe-harbor amount to pay each quarter.
Net earnings are 92.35% of your net profit. Social Security takes 12.4% of that up to the 2026 wage base of $184,500 (less any W-2 wages), and Medicare takes 2.9% with no cap. Earnings above $200,000 single or $250,000 married filing jointly also pay the 0.9% Additional Medicare Tax.
Yes. Half of your self-employment tax is deducted from income when you work out income tax, which is the deductible half shown here.
April 15, June 15 and September 15, 2026, and January 15, 2027. A due date that falls on a weekend or holiday moves to the next business day.
Generally yes, if you expect to owe $1,000 or more for the year after withholding and credits (IRS Form 1040-ES). A W-2 job can raise its withholding to cover it instead.
Yes. It runs the 2026 return in order: half of the self-employment tax comes off, then the standard deduction and the 20% qualified business income deduction, then the 2026 brackets from Rev. Proc. 2025-32. Credits, itemized deductions and other income are not included.
You avoid the underpayment penalty if withholding and estimates cover the smaller of 90% of this year’s tax or 100% of last year’s total tax (110% if last year’s AGI was over $150,000). Enter last year’s tax and the calculator uses whichever is smaller.