Quarterly Estimated Tax Calculator
A rough split of your annual federal tax bill (income tax + self-employment tax) into the four quarterly payments the IRS expects.
About these numbers
This estimates federal income tax (standard deduction, 2025 brackets) plus self-employment tax, then divides by four. It excludes state tax, credits, the QBI deduction, and the safe-harbor rules (paying 100–110% of last year's tax). Treat it as a planning figure, not a filing. 2025 quarterly due dates are typically Apr 15, Jun 16, Sep 15, and Jan 15 (next year).
Frequently asked questions
Do I have to pay quarterly?
Generally if you expect to owe $1,000+ in tax for the year. Underpaying can trigger a penalty, which the safe-harbor rules (pay 100–110% of last year) help avoid.