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 your income in layers. If you earn $50,000, you don't pay the same percentage on every dollar. Instead, you pay a lower rate on the first chunk of income, a higher rate on the next chunk, and so on. The percentage you pay on your last dollar earned is called your marginal tax rate. The average percentage you pay on all your income is called your effective tax rate. These are almost never the same number, and understanding the difference matters when you're figuring out how much you'll actually owe.

For 2024, there are seven federal tax brackets. The rates are 10%, 12%, 22%, 24%, 32%, 35%, and 37%. Which bracket you land in depends on your filing status (single, married filing jointly, head of household, or married filing separately) and your total income for the year. The brackets themselves change every year because they're adjusted for inflation.

Key Takeaways

  • Federal tax brackets are progressive, meaning higher earners pay higher percentages, but only on income above each threshold.
  • Your marginal rate is the percentage you pay on your last dollar; your effective rate is the average percentage across all your income.
  • The seven federal rates for 2024 are 10%, 12%, 22%, 24%, 32%, 35%, and 37%, and the income ranges for each bracket vary by filing status.
  • Your actual tax bill also depends on deductions, credits, and whether you have income from sources other than wages.

How tax brackets actually work

Imagine you're single and earn $60,000 in 2024. You don't pay 22% (the bracket you fall into) on all $60,000. Instead, you pay 10% on the first $11,600, then 12% on income from $11,601 to $47,150, then 22% on income from $47,151 to $60,000. The IRS publishes the exact bracket thresholds each year, and they differ based on whether you file as single, married filing jointly, head of household, or married filing separately.

This is why moving into a higher tax bracket doesn't mean your entire paycheck gets taxed at that higher rate. Only the income that falls into the new bracket is taxed at the new rate. Many people worry that earning more money will push them into a higher bracket and leave them worse off — this is not how it works. Earning an extra dollar always results in more take-home pay, even if that dollar is taxed at a higher rate than the previous one.

The difference between marginal and effective tax rates

Your marginal tax rate is the rate you pay on your last dollar of income. If you're single and earn $60,000, your marginal rate is 22% because that's the bracket your $60,000 falls into. This rate matters when you're deciding whether to take on extra work or side income — you'll pay roughly 22% in federal tax on that additional money (plus payroll taxes if it's wages, or self-employment tax if it's self-employment income).

Your effective tax rate is different. It's your total federal income tax divided by your total income. If you're single, earn $60,000, and owe $6,500 in federal income tax, your effective rate is about 10.8%. This is lower than your marginal rate because you paid 10% on the first chunk of income, 12% on the next chunk, and only 22% on the final chunk. The IRS publishes tax tables and worksheets to help you calculate this, but most tax software does it automatically.

How deductions and credits change what you owe

The tax brackets apply to your taxable income, not your gross income. Before you calculate which bracket you fall into, you subtract either the standard deduction or your itemized deductions. For 2024, the standard deduction is $14,600 for single filers and $29,200 for married couples filing jointly. If your deductions are larger than these amounts, you itemize instead.

Tax credits work differently from deductions. A deduction reduces the income that gets taxed. A credit reduces the tax you owe directly. If you owe $3,000 in federal tax and you have a $500 credit, you now owe $2,500. Some credits are refundable, meaning if the credit is larger than the tax you owe, the government sends you the difference. The Earned Income Tax Credit (EITC) and the Child Tax Credit are the most common ones that affect lower and middle-income households.

Self-employment income and other income sources

If you're self-employed, you pay federal income tax on your net profit using the same brackets as everyone else. However, you also owe self-employment tax (Social Security and Medicare), which is separate from income tax and calculated differently. Self-employment tax is roughly 15.3% on 92.35% of your net profit, and you can deduct half of it when calculating your adjusted gross income.

Income from investments, rental property, or other sources also gets taxed, but often at different rates or under different rules. Long-term capital gains (profits from selling investments you've held for more than a year) are taxed at 0%, 15%, or 20% depending on your income level — these rates are lower than ordinary income tax rates. Dividends are taxed similarly. Rental income is taxed as ordinary income after you deduct expenses. The IRS forms you file determine how each type of income is treated.

State and local income taxes are separate

Federal income tax is only part of what you owe. Most states also collect income tax, and some cities do as well. State rates vary widely — some states have no income tax at all, while others tax income at rates up to 13%. Your state's brackets and rates are completely separate from the federal system. When you look at your paycheck, federal tax, state tax, and local tax (if applicable) are usually withheld separately.

Your employer uses IRS withholding tables to estimate how much federal tax to take from each paycheck. If you have multiple jobs, are self-employed, or have other income sources, your withholding may be too high or too low. You can adjust your withholding by filing a new W-4 form with your employer, or you can settle up when you file your tax return in April.

How inflation adjusts the brackets each year

The IRS adjusts tax brackets annually for inflation. This means the income ranges for each bracket shift upward each year, even if tax rates stay the same. Without this adjustment, inflation would gradually push more people into higher brackets without any real increase in purchasing power — a phenomenon called "bracket creep." The adjustment is based on the Consumer Price Index and is rounded to the nearest $50.

Because brackets change every year, the exact thresholds for 2024 are different from 2023, which were different from 2022. The IRS publishes updated brackets in late fall for the following year. If you're planning your income or trying to understand a previous year's tax bill, you need to use the brackets that were in effect for that specific year.

Frequently Asked Questions

Does earning more money ever result in less take-home pay because of taxes?

No. Moving into a higher tax bracket only affects income above the threshold for that bracket. If you earn an extra $1,000, you pay tax on that $1,000 at your marginal rate, but all your previous income is taxed the same way it was before. You always come out ahead by earning more, even if the additional income is taxed at a higher rate.

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

A tax bracket is a range of income and the rate applied to it. A tax rate is the percentage itself. For example, "22% on income from $47,151 to $100,525" is a bracket. The 22% is the rate. You have multiple brackets stacked together, each with its own rate.

Why do I owe taxes if my employer already withheld money?

Your employer's withholding is an estimate based on the W-4 form you filed. If you have multiple jobs, are self-employed, have investment income, or claimed too many exemptions, your withholding may be too low. When you file your return, the IRS calculates what you actually owe and compares it to what was withheld. If you underpaid, you owe the difference.

Are capital gains taxed at the same rate as my salary?

No. Long-term capital gains (from investments held over a year) are taxed at 0%, 15%, or 20% depending on your total income. These rates are lower than ordinary income tax rates. Short-term capital gains (from investments held under a year) are taxed as ordinary income at your marginal rate.

How do I know which tax bracket I'm in?

Find your filing status and total taxable income (after deductions), then look up the current year's IRS tax bracket table. The IRS publishes these on its website each year. Most tax software calculates this automatically and shows you your bracket and effective rate on your return.