Quarterly Tax Estimator
Estimate your quarterly estimated tax payments. See each due date, avoid underpayment penalties, and stay on track all year. All calculations happen right here in your browser — your numbers never leave your device, and there is nothing to sign up for.
Quarterly Tax Estimator
Estimate your quarterly estimated tax payments to avoid underpayment penalties.
Total self-employment income for the year
Determines tax brackets and standard deduction
Standard: $14,600
Child tax credit, education credits, etc.
Taxes already withheld from W-2 employment
Estimated Annual Tax
$19,501
Income Tax: $8,198
SE Tax: $11,304
After credits & withholding: $19,501
Safe Harbor Quarterly Payment
$4,875
100% of estimated tax / 4
Next Deadline: April 15, 2026
35 days remaining
Q1 — April 15, 2026
$4,875
Upcoming
Q2 — June 15, 2026
$4,875
Q3 — Sept 15, 2026
$4,875
Q4 — Jan 15, 2027
$4,875
How to Use This Calculator
Using this calculator is straightforward. Start by entering your financial information in the fields above. You can adjust any value at any time and the results will update instantly — there is no submit button to press.
- Fill in each field with your best estimates. Exact numbers are great, but reasonable approximations work well too.
- Review the results section that appears below the inputs. Each number is labeled so you know exactly what it represents.
- Try different scenarios by adjusting your inputs. This is a great way to understand how changes in income or expenses affect your bottom line.
- Use the results to plan ahead — whether that means setting aside money for quarterly taxes, adjusting your rates, or identifying deductions you may have missed.
Understanding Your Results
The results above give you a clear snapshot of your financial situation based on the numbers you entered. Here is how to make the most of them:
Look at the big picture first. Start with the summary totals before diving into line-by-line details. This gives you a sense of where you stand overall.
Compare scenarios. Try changing your inputs to see how different situations play out. What happens if your income increases? What if you claim an additional deduction? Playing with the numbers helps you make informed decisions.
Use this as a starting point. These calculations are based on general federal rules and standard rates. Your actual tax situation may differ based on your state, filing status, and specific circumstances. When in doubt, bring these numbers to a tax professional — they make a great conversation starter.
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Frequently Asked Questions
When are quarterly taxes due?
Quarterly estimated tax payments are due April 15, June 15, September 15, and January 15 of the following year. If a due date falls on a weekend or holiday, the deadline moves to the next business day.
What happens if I don't pay quarterly taxes?
The IRS charges an underpayment penalty if you owe more than $1,000 when you file your return and haven't paid at least 90% of your current year tax or 100% of your prior year tax (110% if AGI > $150,000). The penalty is essentially interest on the underpaid amount.
What is safe harbor for estimated taxes?
Safe harbor means paying at least 100% of your prior year's total tax liability (110% if your AGI was over $150,000) through quarterly payments. Meeting safe harbor protects you from underpayment penalties regardless of how much you actually owe.
Do I need to pay quarterly taxes my first year freelancing?
Technically no penalty applies your first year since you had no prior-year tax liability. However, it's smart to start paying quarterly to avoid a large tax bill and to build the habit.