Quarterly Estimated Tax Calculator 2026
Updated for the 2026 tax year · Last updated June 13, 2026
Estimated quarterly tax payment (2026)
$4,708
$18,830 total for the year, paid in 4 installments (Form 1040-ES)
| Self-employment tax | $11,304 |
| Federal income tax | $7,527 |
| Total annual tax | $18,830 |
| Each quarterly payment | $4,708 |
The self-employed pay estimated tax four times a year (April, June, September, January) using Form 1040-ES. This combines self-employment tax and federal income tax on your net earnings, assuming the standard deduction and no other income or credits. State tax not included.
About this calculator
The self-employed pay tax four times a year instead of through withholding. This calculator combines your 2026 self-employment tax and federal income tax, then divides by four to estimate each Form 1040-ES payment.
FAQ
When are 2026 quarterly taxes due?
Estimated payments are generally due April 15, June 15, September 15, and January 15 of the following year (Form 1040-ES).
How much should each quarterly payment be?
Roughly one quarter of your expected annual tax (self-employment tax plus federal income tax). This calculator estimates that total and splits it into four.
What if I underpay?
The IRS may charge an underpayment penalty. Paying at least 90% of this year's tax or 100–110% of last year's (safe harbor) avoids it.
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2026 federal figures from IRS Rev. Proc. 2025-32 and Notice 2025-67; SSA wage base. Estimates for guidance only, not tax advice.