Estimated Tax Calculator 2026
Calculate your quarterly estimated tax payments for 2026 and avoid IRS underpayment penalties.
Estimate Your Quarterly Payments
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Total Yearly Estimated Tax
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When Are Estimated Tax Payments Due?
If you have income without tax withheld — such as self-employment, freelance, rental, or investment income — you generally must pay estimated tax quarterly in four equal installments.
| Installment | 2026 Due Date | Covers Period |
|---|---|---|
| 1st | April 15, 2026 | Jan 1 – Mar 31 |
| 2nd | June 15, 2026 | Apr 1 – May 31 |
| 3rd | Sept 15, 2026 | Jun 1 – Aug 31 |
| 4th | Jan 15, 2027 | Sep 1 – Dec 31 |
The safest way to avoid the underpayment penalty is to pay 100% of last year's tax (110% if your adjusted gross income exceeded $150,000) or 90% of this year's tax, whichever is smaller. Use IRS Form 1040-ES to calculate.
Disclaimer: This is an estimate. Use IRS Form 1040-ES and consult a professional to confirm your actual quarterly payment requirements.