Estimate federal quarterly tax payments for self-employment, freelance, contract, side-business, and other income.
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Income
W-2 / Wages
Self-Employment / 1099 / Freelance
Other Income
Deductions
Safe Harbor (optional)
Your Tax Estimate
Calculation Breakdown
Safe Harbor Payment
2026 Quarterly Due Dates
| Quarter | Income Period | Due Date | Amount Due |
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2026 calculator notes
Updated for 2026: federal tax brackets, standard deductions, self-employment tax assumptions, and 2026 estimated tax due dates.
This calculator provides a baseline estimate using the primary information you enter. Final tax results may vary when all relevant taxpayer information is fully incorporated at tax time.
Estimated tax payment help
After you estimate your quarterly payment, review Quarterly Taxes for Freelancers and Side Businesses, the 2026 Estimated Tax Due Dates, and How to Pay 2026 Estimated Taxes Online before submitting a payment.
If you use IRS Direct Pay, check What Payment Type Should I Choose in IRS Direct Pay? and IRS Direct Pay Mistakes to Avoid. For the broader payment cluster, start with the IRS Payment and Tax Bill Help Center. If you are estimating freelance, 1099, creator, or side-business income, see Self-Employment Tax Explained.
About this 2026 quarterly estimated tax calculator
This calculator estimates federal quarterly tax payments for taxpayers with income that may not be fully covered by withholding, including freelance income, 1099 income, self-employment income, investment income, rental income, and other taxable income. It also shows a safe harbor estimate when prior-year federal tax is entered. For more context, read Self-Employment Tax Explained.
The estimate is simplified. It does not calculate every possible credit, deduction, state tax, AMT item, Additional Medicare Tax, or special business tax rule. Use the result as a planning estimate and confirm payment details before paying.
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Example Quarterly Estimated Tax Scenarios
These examples are simplified planning scenarios. Actual quarterly payments can change with deductions, credits, withholding, prior-year tax, and uneven income.
- Freelancer with $30,000 net self-employment income: quarterly payments may need to cover both federal income tax and self-employment tax.
- W-2 employee with $12,000 side income: the calculator can compare whether existing withholding looks high enough or whether estimated payments may be needed.
- Investor with a large capital gain: estimate the federal tax gap, then review the 2026 Capital Gains Tax Calculator for a more focused investment-sale estimate.
Related Tax Tools
Use these calculators and guides to move between quarterly payments, federal tax, state tax rates, paycheck withholding, and investment sales.
Frequently asked questions
Who may need to make quarterly estimated tax payments?
Taxpayers may need quarterly payments if they expect to owe tax after withholding and credits. This often includes freelancers, independent contractors, small business owners, investors, landlords, retirees with under-withheld income, and people with income not fully covered by withholding.
Does this calculator include self-employment tax?
Yes, it estimates self-employment tax using a simplified approach. It may not cover every special rule, exception, deduction, or business-specific adjustment, so self-employed taxpayers should treat the result as a planning estimate.
What is the safe harbor payment?
A safe harbor payment is a payment amount based on prior-year tax or current-year tax that may help reduce underpayment penalty risk. This calculator can estimate a safe harbor target when the user enters prior-year federal tax.
Does this calculator handle state estimated taxes?
No. This calculator estimates federal quarterly payments only. Many states have their own estimated tax rules, payment deadlines, forms, and safe harbor standards.
Can I pay estimated taxes online?
Yes. Taxpayers can generally pay federal estimated taxes through official IRS payment systems, including IRS Direct Pay or other approved methods. Users should confirm payment type, tax year, and due date before submitting payment.
How Quarterly Estimated Taxes Work
The U.S. tax system operates on a pay-as-you-go basis. Employees have taxes withheld from each paycheck, but if you have self-employment, freelance, rental, or investment income, you typically need to make quarterly estimated payments directly to the IRS.
Who Needs to Pay
You generally need to make quarterly estimated payments if you expect to owe at least $1,000 in federal tax after subtracting withholding and credits. This typically applies to:
- Self-employed individuals, freelancers, and independent contractors
- Business owners (sole proprietors, partners, S-corp shareholders)
- Investors with significant capital gains, dividends, or interest
- Anyone whose employer doesn't withhold enough tax
Self-Employment Tax
Self-employed individuals pay both the employee and employer share of Social Security and Medicare taxes — a combined 15.3% rate (12.4% SS + 2.9% Medicare) on 92.35% of net SE income. The good news: you can deduct half of your SE tax from your gross income, which reduces your federal income tax.
Safe Harbor — Avoid Underpayment Penalties
Even if your estimate isn't perfect, you can avoid IRS underpayment penalties by paying under the "safe harbor" rule:
- 100% of last year's tax — pay at least as much as your total 2025 federal tax liability
- 110% rule — if your 2025 AGI exceeded $150,000 ($75,000 MFS), pay 110% of your 2025 tax
- 90% of this year's tax — pay at least 90% of your actual 2026 liability
You're protected if you meet either the 90% current-year or the 100%/110% prior-year method.
2026 Quarterly Due Dates
- Q1 — January 1 – March 31 → April 15, 2026
- Q2 — April 1 – May 31 → June 15, 2026
- Q3 — June 1 – August 31 → September 15, 2026
- Q4 — September 1 – December 31 → January 15, 2027
Pay using IRS Direct Pay at irs.gov/payments or by mailing Form 1040-ES with a check.
This calculator provides federal tax estimates only. Self-employment tax uses a 15.3% rate on 92.35% of net SE income; the SS portion (12.4%) is capped at the 2026 wage base — high earners with W-2 income above the SS wage base should consult a tax professional. Does not account for state taxes, AMT, Additional Medicare Tax (0.9%), capital gains rates, QBI deduction, or other adjustments. Tax situations vary widely. Consult a tax professional for advice specific to your situation.