Number Quarterly Estimated Tax Calculator
Self-employed? The IRS wants its cut four times a year. Enter your expected annual profit and tax bracket to estimate each quarterly payment — covering both self-employment tax and federal income tax.
| Self-employment taxable earnings (92.35%) | $0 |
| Self-employment tax (15.3%) | $0 |
| Federal income tax | $0 |
| Total annual tax | $0 |
How it works
Two taxes apply to self-employment income. Self-employment tax = profit × 0.9235 × 15.3% (covers Social Security + Medicare). Federal income tax = profit × your marginal bracket. Total annual tax = SE tax + income tax, and each quarterly payment = total ÷ 4.
Frequently asked questions
Who has to pay estimated taxes quarterly?
Generally, anyone who expects to owe $1,000 or more in tax after withholding and credits. Most freelancers, contractors, and small business owners qualify — employees with enough W-2 withholding usually don't.
When are the quarterly deadlines?
For 2026: April 15, June 15, September 15, 2026, and January 15, 2027. If a date falls on a weekend or holiday, the deadline shifts to the next business day.
What happens if I underpay?
The IRS can charge an underpayment penalty plus interest. Safe harbors: pay at least 90% of this year's tax or 100% of last year's tax (110% if your AGI was over $150,000) through quarterly payments and withholding.