Quarterly Estimated Tax Calculator

Find the safe-harbor amount and the four payment dates that avoid an underpayment penalty.

Tax yearLast year's total federal tax

Last year's AGI was over $150,000 ($75,000 if married filing separately)Expected total federal tax this year

Federal tax withheld from wages this year

Safe-harbor payment per quarter$8,500

Safe-harbor target for the year: $44,000
Based on: 110% of last year's tax
Still to pay after withholding: $34,000
Payment 1 due: Apr 15, 2026
Payment 2 due: Jun 15, 2026
Payment 3 due: Sep 15, 2026
Payment 4 due: Jan 15, 2027

Estimate only. A CPA will confirm what applies to you.

Set my estimates with a CPA

You probably need estimated payments if you have

Self-employment or partnership income
S-corp distributions without enough salary withholding
Rental income or large investment gains
A big bonus, equity vesting, or a business sale
Withholding that covers less than last year's tax
Income that changed sharply from last year

Turn an estimate into a plan

This calculator uses simplified 2026 federal rules to show whether an idea is worth a conversation. A CPA can confirm the numbers with your actual returns, check eligibility and deadlines, and put the plan in place.

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Educational estimate, not tax advice.