Federal income tax is not one flat rate — it's a system of brackets where you pay different percentages on different portions of your income

The federal government taxes income in layers. If you earn $50,000, you don't pay the same percentage on all $50,000. Instead, you pay a lower rate on the first chunk, a higher rate on the next chunk, and so on. The rates themselves change each year and depend on your filing status — single, married filing jointly, head of household, or married filing separately.

For 2024, the federal income tax brackets range from 10% at the lowest end to 37% at the highest. But that 37% applies only to income above a certain threshold, not to your whole paycheck. Most people pay an effective rate — the actual percentage of total income that goes to federal tax — that is much lower than the top bracket rate.

Key Takeaways

  • Federal income tax uses brackets: you pay 10%, 12%, 22%, 24%, 32%, 35%, or 37% depending on which portion of your income falls into each bracket.
  • Your effective tax rate (what you actually pay as a percentage of total income) is lower than your marginal rate (the rate on your last dollar earned).
  • Tax brackets change each year and differ based on whether you file as single, married filing jointly, head of household, or married filing separately.
  • Your actual federal tax bill also depends on deductions, credits, and whether you have income from wages, investments, or self-employment.

The seven federal tax brackets for 2024

The Internal Revenue Service sets new brackets each year based on inflation. For the 2024 tax year (filed in 2025), the brackets are 10%, 12%, 22%, 24%, 32%, 35%, and 37%. The income ranges that fall into each bracket vary by filing status.

If you file as single, for example, the 10% bracket covers income from $0 to $11,600. The 12% bracket covers $11,601 to $47,150. The 22% bracket covers $47,151 to $100,525. And so on, up to the 37% bracket, which applies to income over $578,100. If you file as married filing jointly, each bracket is wider — the 10% bracket goes up to $23,200, the 12% bracket up to $94,300, and so forth.

How to calculate your effective tax rate

Your effective tax rate is your total federal income tax divided by your total income. It's always lower than your marginal rate (the rate on your last dollar earned) because you pay lower rates on the earlier portions of your income.

Suppose you're single and earn $60,000 in 2024. You pay 10% on the first $11,600 ($1,160), then 12% on the next $35,550 ($4,266), then 22% on the remaining $12,850 ($2,827). Your total federal tax is $8,253. Divide that by $60,000 and your effective rate is about 13.8% — even though your marginal rate is 22%.

Your actual tax bill will be different if you claim deductions or have tax credits. The standard deduction (which reduces your taxable income) is $14,600 for single filers in 2024. If you take that deduction, your taxable income drops to $45,400, and your federal tax drops accordingly.

What changes your federal tax rate

Several things affect how much federal tax you owe. Your filing status matters — married filing jointly brackets are wider than single brackets, so couples often pay less total tax on the same income. The number of dependents you claim can lower your tax through the child tax credit or other credits. Income from different sources — wages, self-employment, capital gains, dividends — may be taxed differently.

Deductions also matter. If you itemize deductions instead of taking the standard deduction, you reduce your taxable income further. Retirement contributions to a traditional 401(k) or IRA lower your taxable income. Student loan interest, education credits, and the earned income tax credit can all reduce what you owe.

State and local taxes don't change your federal rate, but they do reduce your take-home pay. Some people live in states with no income tax, while others pay state rates of 5% to 13% on top of federal tax.

The difference between marginal and effective tax rates

Your marginal tax rate is the percentage you pay on your last dollar of income — the rate of the bracket you're currently in. Your effective tax rate is the average percentage you pay on all your income. These are often confused, but they're very different numbers.

If you earn $100,000 as a single filer in 2024, your marginal rate is 24% (because $100,000 falls in the 24% bracket). But your effective rate is roughly 13.5%, because you paid 10% on the first chunk, 12% on the next chunk, 22% on another chunk, and 24% only on the portion above $100,525. Understanding this difference matters when you're deciding whether to take on extra income or claim a deduction — you don't lose money by earning more, because you only pay the higher rate on the additional income.

Self-employment and investment income tax rates

If you're self-employed, you pay federal income tax using the same brackets as everyone else, but you also owe self-employment tax — 15.3% on net earnings (12.4% for Social Security, 2.9% for Medicare). This is in addition to your regular federal income tax, not instead of it.

Long-term capital gains and may have access to dividends are taxed at lower rates than ordinary income: 0%, 15%, or 20%, depending on your total income and filing status. Short-term capital gains (assets held less than a year) are taxed as ordinary income using the regular brackets. This is why investment income is often taxed differently from wages.

How to find your specific tax rate

The IRS publishes updated tax tables and brackets each year on irs.gov. You can also use the tax brackets table for your filing status to find which bracket your income falls into. If you use tax software or work with a tax preparer, they calculate your effective rate and total tax owed based on your specific situation.

Your W-2 from an employer or your own tax return from the previous year can also show you what you actually paid. Divide your total federal tax by your total income to see your effective rate. This gives you a real number for your situation, not a general estimate.

Frequently Asked Questions

Why do I pay different percentages on different parts of my income?

The federal tax system is progressive — it taxes higher income at higher rates to spread the tax burden. You pay 10% on your first dollars because that's considered basic income, then higher percentages as you earn more. This means the system taxes ability to pay rather than treating everyone the same.

Is my effective tax rate the same as what comes out of my paycheck?

No. Your paycheck withholding is an estimate based on your W-4 form. Your actual effective tax rate is calculated when you file your tax return. If too much was withheld, you get a refund. If too little was withheld, you owe more when you file.

Do state taxes affect my federal tax rate?

State income taxes don't change your federal tax rate, but they do reduce your total take-home pay. Some states have no income tax, while others tax income at rates up to 13%. You pay both federal and state tax separately.

What's the difference between a tax bracket and a tax rate?

A tax bracket is a range of income that gets taxed at a specific rate. A tax rate is the percentage you pay on income in that bracket. You move through multiple brackets as your income increases, paying a different rate on each portion.

Does earning more money push me into a higher tax bracket and cost me money?

No. Only the income that falls into the higher bracket is taxed at the higher rate. If earning an extra $1,000 pushes you into the 24% bracket, you only pay 24% on that $1,000, not on your entire income. You always come out ahead by earning more.