💰 Finance
Quarterly Estimated Tax Calculator
For freelancers, 1099 contractors, and self-employed individuals. Know what to pay each quarter — and when.
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Q1
Due Apr 15, 2025
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Q2
Due Jun 16, 2025
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Q3
Due Sep 15, 2025
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Q4
Due Jan 15, 2026
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Total Estimated Tax Owed
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Tax breakdown
Safe Harbor Rules — Avoid Underpayment Penalty
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⚠️ Based on 2024–2025 federal tax rates. Texas has no state income tax. These are estimates — see a tax professional for your actual situation. Pay via IRS Direct Pay or EFTPS.
How quarterly taxes work
If you expect to owe at least $1,000 in federal taxes, the IRS requires quarterly estimated payments. Self-employed individuals pay both the employee and employer share of FICA (15.3%), but can deduct half of it.
Net SE Income = Gross − Business Expenses
SE Tax = Net Income × 92.35% × 15.3%
Taxable Income = Net Income − (SE Tax ÷ 2) − Standard Deduction
Each quarter = (Total Tax − Withholding) ÷ 4
SE Tax = Net Income × 92.35% × 15.3%
Taxable Income = Net Income − (SE Tax ÷ 2) − Standard Deduction
Each quarter = (Total Tax − Withholding) ÷ 4
The IRS safe harbor rule says you avoid the underpayment penalty if you pay at least 90% of this year's tax liability OR 100% of last year's tax (110% if AGI > $150,000).