Quarterly Estimated Tax Calculator
Calculate your quarterly estimated tax payments to avoid underpayment penalties. See due dates and safe harbor thresholds.
📅 Tax Year:
Calculate Quarterly Payments
$
Income tax + SE tax combined
$
$
From last year's return
How It Works
If you expect to owe $1,000 or more in taxes after withholding, you generally must make quarterly estimated tax payments or face penalties.
Due Dates
| Period | Due Date |
|---|---|
| Jan 1 – Mar 31 | April 15 |
| Apr 1 – May 31 | June 15 |
| Jun 1 – Aug 31 | September 15 |
| Sep 1 – Dec 31 | January 15 (next year) |
Safe Harbor Rules
To avoid penalties, pay the lesser of:
- 90% of current year's tax liability, OR
- 100% of prior year's tax (110% if AGI > $150,000)
Also, no penalty if you owe less than $1,000 after withholding and credits.
Examples
Example: $25,000 Estimated Tax, $5,000 Withholding
Remaining: $20,000
Quarterly payment: $20,000 ÷ 4 = $5,000
What this calculator does
This page turns the visible tax inputs into a planning estimate that can be checked against official forms and records. It is designed for quick comparison, not as a substitute for professional tax advice.
How to use this calculator
- Enter the filing status, income, deduction, credit, withholding, and other fields that apply to your situation.
- Run the calculator and review the tax estimate, rate, deduction, or planning result shown on the page.
- Compare the result with IRS forms, state rules, and your own records before making payment or filing decisions.
Frequently Asked Questions
Quarterly estimated tax calculator 2026?
Start with the key tax inputs and keep each number easy to verify. For the Quarterly Estimated Tax Calculator, start with expected income, deductions, credits, self-employment tax, withholding, prior-year tax, and uneven income by quarter. Then use: quarterly payment = required annual estimated tax after withholding / 4, unless annualized income applies. For 2026 individual estimates, the regular due dates are April 15, June 15, September 15, 2026, and January 15, 2027. Read the result as safe-harbor target and quarterly payment amount. A common safe harbor is 90% of current-year tax or 100% of prior-year tax, with 110% for many higher-income taxpayers.
How much should I pay in quarterly taxes?
Separate each tax component so the estimate stays readable and easier to check. The Quarterly Estimated Tax Calculator works best when you enter expected income, deductions, credits, self-employment tax, withholding, prior-year tax, and uneven income by quarter. The planning formula is quarterly payment = required annual estimated tax after withholding / 4, unless annualized income applies. For 2026 individual estimates, the regular due dates are April 15, June 15, September 15, 2026, and January 15, 2027. Use the final number for safe-harbor target and quarterly payment amount. A common safe harbor is 90% of current-year tax or 100% of prior-year tax, with 110% for many higher-income taxpayers.
Estimated tax payment calculator self employed?
Use this as a planning estimate, then reconcile it with the actual tax forms. Enter expected income, deductions, credits, self-employment tax, withholding, prior-year tax, and uneven income by quarter in the Quarterly Estimated Tax Calculator. A practical formula is: quarterly payment = required annual estimated tax after withholding / 4, unless annualized income applies. For 2026 individual estimates, the regular due dates are April 15, June 15, September 15, 2026, and January 15, 2027. Review safe-harbor target and quarterly payment amount. A common safe harbor is 90% of current-year tax or 100% of prior-year tax, with 110% for many higher-income taxpayers.
Quarterly tax due dates 2026 calculator?
For 2026 individual estimated taxes, use the regular due dates: April 15, June 15, September 15, 2026, and January 15, 2027. The calculator should estimate your full-year income tax, self-employment tax, credits, and withholding, then divide the required remaining amount across the quarters. If income is uneven, use the annualized income method instead of forcing equal payments. That can be useful for freelancers with seasonal income.
Safe harbor estimated tax calculator?
Safe harbor is about avoiding underpayment penalties, not necessarily paying the perfect tax. For many individuals, the target is the smaller of 90% of current-year tax or 100% of prior-year tax; higher-income taxpayers often use 110% of prior-year tax. Enter last year's tax, this year's expected tax, withholding, and estimated payments. The calculator should show the payment needed to stay inside the safe-harbor rules.
1040-ES payment calculator?
Start with the key tax inputs and keep each number easy to verify. Enter expected income, deductions, credits, self-employment tax, withholding, prior-year tax, and uneven income by quarter in the Quarterly Estimated Tax Calculator. A practical formula is: quarterly payment = required annual estimated tax after withholding / 4, unless annualized income applies. For 2026 individual estimates, the regular due dates are April 15, June 15, September 15, 2026, and January 15, 2027. Review safe-harbor target and quarterly payment amount. A common safe harbor is 90% of current-year tax or 100% of prior-year tax, with 110% for many higher-income taxpayers.
Quarterly taxes calculator for freelancers?
Separate each tax component so the estimate stays readable and easier to check. For the Quarterly Estimated Tax Calculator, start with expected income, deductions, credits, self-employment tax, withholding, prior-year tax, and uneven income by quarter. Then use: quarterly payment = required annual estimated tax after withholding / 4, unless annualized income applies. For 2026 individual estimates, the regular due dates are April 15, June 15, September 15, 2026, and January 15, 2027. Read the result as safe-harbor target and quarterly payment amount. A common safe harbor is 90% of current-year tax or 100% of prior-year tax, with 110% for many higher-income taxpayers.
Use Cases
- Self-employed freelancers and contractors — determine each quarterly voucher amount so you stay ahead of IRS deadlines.
- Small-business owners without payroll withholding — avoid year-end surprises by spreading tax payments across four quarters.
- Investors with significant capital gains — estimate additional tax owed on realized gains outside of W-2 withholding.
- Retirees with pension or rental income — calculate payments when income is not subject to employer withholding.
- Side-income earners — figure out whether you need to make estimated payments based on the $1,000 threshold.
Assumptions & Limitations
- The calculator divides the remaining tax equally across four quarters; it does not use the annualized income installment method.
- Safe harbor thresholds follow the 100%/110% prior-year rule based on whether AGI exceeds $150,000.
- Due dates assume standard IRS deadlines. If a due date falls on a weekend or holiday, the actual deadline shifts to the next business day.
- State estimated tax obligations are not included in this calculation.
- Credits (such as the earned income credit or child tax credit) are not factored in; enter your net expected tax after credits.
- Results are estimates for planning purposes only. Consult a qualified tax professional or the IRS for your exact liability.
Sources & References
- IRS Form 1040-ES Instructions — Estimated Tax for Individuals
- IRS Publication 505 — Tax Withholding and Estimated Tax
- IRS Publication 334 — Tax Guide for Small Business
- IRS Revenue Procedure 2025-11 — 2026 inflation-adjusted amounts
- IRS Publication 17 — Your Federal Income Tax
- 26 U.S. Code § 6654 — Failure to pay estimated income tax
This calculator is provided for informational purposes only and does not constitute tax, legal, or financial advice. Always verify figures with official IRS publications or a licensed tax professional.