Income Tax Calculator
Estimate progressive tax using taxable income and brackets you enter. The example brackets are not official rates, and no jurisdiction’s tax law is applied automatically.
Calculator arithmetic runs locally in your browser and does not require an API.
The interactive calculator loads here when JavaScript is enabled.
How to use Income Tax Calculator
Replace the example upper limits and rates with your own assumptions. Limits must ascend, and only the last bracket may have an unlimited upper bound.
Formula and method
Band tax = income in that band × band rate. Effective rate = total tax/taxable income × 100. Marginal rate applies to the next increment of income.
Understanding the results
A higher marginal rate does not apply to all income. The breakdown separates bands; deductions, credits, allowances and payroll taxes are excluded. Verify brackets and taxable income before relying on an estimate.
Worked example
With example bands of 10% up to 10,000, 20% up to 40,000 and 30% above it, income of 50,000 gives 1,000 + 6,000 + 3,000 = 10,000 tax. Effective rate is 20%, marginal rate is 30% and after-tax amount is 40,000.
These are mathematical estimates, not financial advice or an offer of credit.
Frequently asked questions
Are the starting brackets official?
No. They are editable examples, not official rates for any country, state or tax year.
How do marginal and effective rates differ?
Marginal rate applies to the next income increment; effective rate is total tax divided by taxable income.
Should I enter gross salary?
Enter taxable income under your chosen assumptions. Gross salary may require deductions or adjustments that this tool does not determine.
Are credits or payroll taxes included?
No. The model only applies your entered progressive brackets.