Quarterly Estimated Tax Calculator
Figure your 1040-ES quarterly payment in your browser. Your income never leaves your device — no upload, no signup.
100% private
Runs entirely in your browser. Your income figures are never uploaded or logged.
Safe-harbor method
Uses your own prior-year tax for a penalty-proof number — the method the IRS guarantees.
Instant
Results update as you type, with a full breakdown.
Penalty-proof and exact: pay 100% of last year's tax (110% if you were a higher earner), split into four. Needs only numbers from your last return.
Estimated payment per quarter
$—
$0 total across four vouchers
Fill your 1040-ES voucher with this amountThis is an estimate, not tax advice. It does not include the Additional Medicare Tax, the QBI deduction, most credits, or state tax. We are not affiliated with the IRS. For anything beyond a simple situation, check the official 1040-ES instructions or a tax professional, and consider paying through IRS Direct Pay or EFTPS.
Privacy: everything is calculated in your browser. None of the figures you enter are uploaded or logged.
Frequently Asked Questions
How much should I pay in quarterly estimated taxes?
The safest answer is the safe harbor: pay 100% of last year's total tax (110% if your prior-year AGI was over $150,000, or $75,000 if married filing separately), split into four payments. That avoids an underpayment penalty no matter how this year turns out. If you don't have a prior-year return, project this year's tax instead.
When are quarterly taxes due?
Generally April 15, June 15, September 15, and January 15 of the following year. When a date lands on a weekend or holiday it moves to the next business day. Always confirm the current-year dates in the IRS 1040-ES instructions.
Does this calculator send my income anywhere?
No. Every number is calculated in your browser with JavaScript. Nothing you type is uploaded, stored, or logged. You can disconnect from the internet after the page loads and it still works.
What's not included in this estimate?
To stay simple and reliable, the projection uses the standard deduction and does not include the Additional Medicare Tax, the qualified business income (QBI) deduction, tax credits, the alternative minimum tax, or state taxes. Use it as a starting point, then refine with the official worksheet or a professional.
How do I actually pay?
You can mail the Form 1040-ES voucher with a check, or pay online through IRS Direct Pay (from a bank account, no account needed) or EFTPS. Paying electronically is faster and you don't need the paper voucher.
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How quarterly estimated taxes work
If you earn money that has no tax withheld — freelance and contractor pay, self-employment, interest, dividends, or rent — the IRS expects you to pay tax on it in four installments across the year using Form 1040-ES, rather than all at once in April. Skip them or underpay and you can owe an underpayment penalty on top of the tax.
The simplest way to stay penalty-free is the safe harbor: pay 100% of last year's total tax (110% if your prior-year AGI was over $150,000, or $75,000 if married filing separately), divided into four. Because it is based on a number you already know, it is exact and cannot be thrown off by a good or bad year. If you are new to self-employment and have no prior-year return, project this year's tax from your expected income instead.
This calculator runs entirely in your browser. The income figures you enter are never uploaded or logged. When you have your number, you can fill the official 1040-ES voucher here too, or pay online through IRS Direct Pay or EFTPS.