Quarterly Estimated Tax Calculator
Plan your quarterly estimated payments to avoid IRS underpayment penalties. Includes safe harbor calculation and Q1–Q4 payment schedule.
$120,000
$
$20,000
$
$0
$
$18,000
$
Find this on last year's Form 1040 line 24
Payment Schedule
| Quarter | Period | Due Date | Amount |
|---|---|---|---|
| Q1 | Jan 1 – Mar 31 | Apr 15, 2025 | $4,500 |
| Q2 | Apr 1 – May 31 | Jun 16, 2025 | $4,500 |
| Q3 | Jun 1 – Aug 31 | Sep 15, 2025 | $4,500 |
| Q4 | Sep 1 – Dec 31 | Jan 15, 2026 | $4,500 |
Underpayment Warning: You may owe an underpayment penalty of ~$1,886. Pay estimated taxes to avoid this.
This calculator provides estimates for educational purposes only. Consult a qualified tax professional for advice specific to your situation.
Estimated Tax
$4,500
Recommended Quarterly Payment
Annual Tax Liability$26,189
Federal Income Tax$12,060
Self-Employment Tax$14,130
W-2 Withholding– $0
Safe Harbor Amount$18,000
Recommended Method100% Prior Year
Quarterly Payment$4,500
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Frequently Asked Questions
You need to make estimated payments if you expect to owe $1,000 or more in federal tax after subtracting withholding and credits. This includes freelancers, business owners, investors, and anyone with significant income not subject to withholding.