DocomintSalary / Income Tax Calculator
Estimate income tax and net pay using progressive US federal tax brackets.
Demonstrates how progressive tax brackets actually work: each bracket's rate only applies to the slice of income that falls inside it, not to your entire income — a common misconception that leads people to think crossing into a higher bracket somehow reduces their take-home pay from lower-bracket income, which isn't how it works. Uses illustrative 2024 US federal brackets on taxable income only, with no deductions, credits, or state/payroll tax — a demonstration of the mechanism, not a tax-filing substitute.
Example: $75,000 of single-filer taxable income owes about $11,553 under the illustrative brackets — not 22% flat ($16,500), since only the portion of income above $47,150 is taxed at 22%; everything below that is taxed at the lower 10%/12% rates first.
How it works
- Enter your taxable income and choose a filing status
- Press Calculate
- Estimated tax, net pay, and a per-bracket breakdown appear instantly, computed on your device
Frequently asked questions
Is this accurate enough to use for filing my taxes?
No — this uses simplified, illustrative bracket tables to demonstrate how progressive taxation works, with no deductions, credits, state tax, or payroll tax applied. Use real tax software or a tax professional for anything you're actually filing.
Why doesn't crossing into a higher tax bracket lower my take-home pay?
Because tax brackets are marginal, not flat — only the portion of income inside a higher bracket is taxed at that bracket's rate; every dollar below it is still taxed at the lower rates it always was. Earning one more dollar into a new bracket never reduces your total after-tax income.
Is my numbers uploaded anywhere?
No — Salary / Income Tax Calculator runs entirely in your browser using JavaScript/WebAssembly. Your numbers is never sent to a server.