Income Tax Calculator
Estimate your income tax with your own rate.
All calculations happen locally in your browser — nothing is uploaded, stored or tracked.
Enter your gross income
Total income for the year.
Enter deductions
Standard or itemized.
Enter your effective tax rate
Your average rate — the calculator applies it.
What Is an Income Tax Calculator?
An income tax estimator works out the tax on your income: subtract deductions from gross income to get taxable income, apply a tax rate, and see what remains.
Because tax systems, brackets and rates change every year and vary by country and state, this site does not fabricate current brackets. You enter the effective tax rate that applies to you — your total tax divided by your taxable income — and the calculator handles the arithmetic transparently.
The Method
The effective rate is the average rate you actually pay across all brackets. If you do not know it, use your marginal bracket as a conservative estimate or your previous year's average.
Your data never leaves your device.
Every calculation on this site runs in your browser using vanilla JavaScript. Nothing is uploaded, stored or tracked.
- 100% local, client-side calculations
- No data stored on any server
- No tracking, no analytics, no ads scripts
- Works offline once loaded
Frequently Asked Questions
How do I calculate my income tax?
Subtract deductions from gross income, then apply your tax rate to the taxable remainder. This calculator does exactly that with the rate you enter.
What is an effective tax rate?
Total tax paid divided by taxable income — the average rate across all brackets, lower than your top marginal rate.
Why do I have to enter the tax rate?
Rates and brackets change annually and vary by jurisdiction. A static site cannot know your current, location-specific rate.
What is the difference between marginal and effective rate?
Marginal is the rate on your last dollar of income; effective is your overall average. Use effective for estimation.
Does this include payroll taxes?
No — it estimates income tax only. Use the paycheck calculator for FICA-inclusive take-home pay.