Tax Calculator
Why Your Tax Rate Isn't Just One Number
The U.S. federal income tax system is progressive: each dollar of taxable income is taxed at the rate of the bracket it falls into, not at a single flat rate applied to the whole amount. That's why someone in the "24% bracket" doesn't actually pay 24% of their total income in tax — only the portion of income that falls inside that bracket is taxed at 24%; everything below it is taxed at the lower rates that came first.
The Formula
Total Tax Owed = Σ Tax in Bracket
Effective Rate = (Total Tax Owed ÷ Taxable Income) × 100
The calculator walks through each bracket in order, taxing only the slice of income that falls within it, and sums the results. This produces both the total tax owed and the effective (blended) rate, which is always lower than your top marginal bracket.
2024 Federal Tax Brackets
| Rate | Single | Married Filing Jointly |
|---|---|---|
| 10% | $0 – $11,600 | $0 – $23,200 |
| 12% | $11,600 – $47,150 | $23,200 – $94,300 |
| 22% | $47,150 – $100,525 | $94,300 – $201,050 |
| 24% | $100,525 – $191,950 | $201,050 – $383,900 |
| 32% | $191,950 – $243,725 | $383,900 – $487,450 |
| 35% | $243,725 – $609,350 | $487,450 – $731,200 |
| 37% | $609,350+ | $731,200+ |
These are the exact brackets used by this calculator's engine. The IRS adjusts brackets annually for inflation, so figures for later tax years will differ.
Where This Matters
- Paycheck and take-home planning — estimating what actually lands in your bank account after federal tax.
- Comparing filing statuses — married filing jointly roughly doubles most bracket widths compared to single, which changes the effective rate at the same income.
- Marginal decisions — understanding your marginal bracket helps evaluate whether extra income (a bonus, freelance work, a Roth conversion) is worth pursuing after tax.
How to Use This Calculator
- Enter your Taxable Income (after deductions, not gross income).
- Select your Filing Status — Single or Married Filing Jointly.
- Select Calculate to see total tax owed, a bracket-by-bracket breakdown, your effective tax rate, and after-tax income.
Related Calculations
For consumption taxes rather than income tax, see the Sales Tax Calculator or the VAT Calculator.