Quarterly Estimated Tax Calculator
2026Calculate quarterly estimated tax payments for self-employed and freelancers. Includes safe harbor calculation to avoid penalties.
Total Estimated Tax
$25,745.30
Quarterly Payment
$6,436.32
Safe Harbor Amount
$25,745.30
Quarterly Payment Schedule
| Q1 — Due April 15 | $6,436.32 |
| Q2 — Due June 15 | $6,436.32 |
| Q3 — Due September 15 | $6,436.32 |
| Q4 — Due January 15 (next year) | $6,436.32 |
Tax Calculation
| Net Self-Employment Income | $100,000.00 |
| Self-Employment Tax | $14,129.55 |
| 50% SE Tax Deduction | - $7,064.78 |
| Adjusted Gross Income | $92,935.23 |
| Standard Deduction | - $16,100.00 |
| Taxable Income | $76,835.23 |
| Federal Income Tax | $11,615.75 |
| Total Estimated Tax | $25,745.30 |
| Remaining Tax Due | $25,745.30 |
Safe Harbor & Penalty Risk
| Safe Harbor (100% of prior year) | $25,745.30 |
| Prior Year Tax | Not provided |
| Penalty Risk | At Risk — pay estimated taxes to avoid underpayment penalty |
Use the Quarterly Estimated Tax Calculator above to calculate your results. Enter your values and see instant results — all calculations run in your browser.
Disclaimer: This calculator is for informational purposes only and does not constitute tax, financial, or legal advice. Results are estimates based on the information you provide and current rates. Always consult a qualified tax professional or financial advisor for advice specific to your situation.
How It Works
This calculator helps self-employed individuals and small business owners estimate and pay their quarterly income taxes. It's crucial because the IRS requires you to pay income tax as you earn it, not just at year-end, to avoid penalties.
The calculator typically uses your estimated gross income, deductible expenses, and any tax credits to project your annual tax liability. This annual amount is then divided by four to determine your estimated quarterly payment.
Always overestimate your income rather than underestimate to avoid underpayment penalties. Don't forget to account for self-employment taxes (Social Security and Medicare) which are often overlooked when calculating estimated taxes.
Example: Freelance Designer's Quarterly Tax
- 1 Sarah, a freelance graphic designer, estimates her next quarter's gross income to be $15,000. She anticipates $2,000 in business expenses (software, supplies) and has total annual tax credits of $500.
- 2 The calculator first projects her annual taxable income. Let's assume after deductions and other considerations, her estimated annual tax liability is $8,000. This $8,000 is then divided by four for quarterly payments.
- 3 Based on this, Sarah's estimated quarterly tax payment would be $2,000 ($8,000 / 4).
- 4 Sarah should set aside $2,000 for her quarterly tax payment to the IRS by the due date. This proactive approach helps her manage her finances and avoid potential penalties for underpayment.
Source: IRS — Small Business & Self-Employed · Last updated: April 2026
Frequently Asked Questions
Who needs to pay quarterly estimated taxes?
When are quarterly estimated tax payments due in 2026?
How do I avoid the estimated tax penalty?
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