Quarterly Estimated Tax Calculator
Avoid underpayment penalties with the right quarterly payments
Calculator
Estimate Your Quarterly Payments
Enter your expected annual income and taxes withheld. The calculator determines your quarterly payment amount and includes safe harbor guidance.
Frequently Asked Questions
When are quarterly payments due?
Q1: April 15, Q2: June 16, Q3: September 15, Q4: January 15 of the following year. If a due date falls on a weekend or holiday, the deadline moves to the next business day.
What is the safe harbor rule?
You avoid underpayment penalties if you pay at least 90% of this year's tax liability OR 100% of last year's (110% if AGI was over $150K). This calculator shows both thresholds so you can choose the lower one.
Who needs to pay quarterly taxes?
Generally, anyone who expects to owe $1,000 or more in tax after subtracting withholding and credits. This commonly includes freelancers, self-employed individuals, landlords, and people with significant investment income.
Quarterly Estimated Tax Calculator
Calculate your quarterly estimated tax payments for freelance, self-employment, rental, or investment income. The calculator accounts for SE tax, income tax, withholding, and the safe harbor rule to help you avoid underpayment penalties.