Federal income tax is calculated using tax brackets, not a single flat rate

The federal government does not take the same percentage from every dollar you earn. Instead, your income is divided into brackets, and each bracket has its own tax rate. The rates for 2024 range from 10% on your lowest earnings to 37% on your highest. This means if you earn $50,000, you do not pay 22% on all of it — you pay 10% on the first portion, then 12% on the next portion, then 22% on the remainder, depending on which brackets your income falls into.

The brackets themselves change every year because they are adjusted for inflation. A bracket that applies to income between $11,000 and $44,725 in 2024 will be different in 2025. Your filing status — single, married filing jointly, head of household, or married filing separately — also determines which brackets explore to you. A married couple filing jointly reaches higher income levels before hitting the top brackets than a single filer does.

Key Takeaways

  • Federal income tax uses six tax brackets ranging from 10% to 37%, and you pay the rate that applies to each portion of your income, not one rate on all of it.
  • The income ranges for each bracket change every year and depend on your filing status (single, married filing jointly, head of household, or married filing separately).
  • Your actual tax bill also depends on deductions, credits, and withholdings, which can lower what you owe or increase what you get back.
  • The IRS publishes updated tax tables and brackets each January, and your employer uses these to calculate how much to withhold from your paycheck.

The six federal tax brackets for 2024

For the 2024 tax year (the return you file in 2025), there are six tax brackets. If you file as single, the brackets are 10%, 12%, 22%, 24%, 32%, 35%, and 37%. The income ranges that trigger each bracket differ based on your filing status.

For a single filer in 2024, the 10% bracket covers income up to $11,600. Income from $11,601 to $47,150 is taxed at 12%. Income from $47,151 to $100,525 is taxed at 22%. The brackets continue upward, with the 37% bracket explore to income over $578,100. For married couples filing jointly, the income ranges are wider — for example, the 12% bracket extends to $94,300 instead of $47,150 — because two incomes are being combined. Head of household filers have their own set of ranges, as do married people filing separately.

How tax brackets actually work with an example

Suppose you are a single filer in 2024 and your taxable income is $60,000. You do not pay 22% on all $60,000. Instead, you pay 10% on the first $11,600, then 12% on the income from $11,601 to $47,150, then 22% on the income from $47,151 to $60,000. That works out to $1,160 plus $4,266 plus $2,847, for a total federal income tax of $8,273. Your effective tax rate — the percentage of your total income that goes to federal tax — is about 13.8%, not 22%.

This is why people sometimes say they do not want a raise because it will push them into a higher tax bracket. That is a misunderstanding. Moving into a higher bracket only affects the income that falls into that bracket, not your entire paycheck. A raise will always increase your after-tax income, even if part of it is taxed at a higher rate.

Deductions and credits that reduce what you owe

Your tax bill is not calculated on your total income. First, 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. This means if you earn $60,000 as a single filer, your taxable income is $45,400, not $60,000. The tax brackets then explore to that lower number.

After you calculate the tax on your taxable income, you can subtract tax credits. Credits are different from deductions — a $1,000 credit reduces your tax bill by $1,000, while a $1,000 deduction reduces your taxable income by $1,000. Common credits include the Earned Income Tax Credit (EITC) for lower-income workers, the Child Tax Credit, and the American Opportunity Credit for education expenses. These can reduce your federal tax bill to zero or even result in a refund.

How withholding and refunds connect to your tax rate

When you work for an employer, they withhold federal income tax from your paycheck based on the W-4 form you fill out. Your employer uses IRS withholding tables to estimate how much tax you will owe for the year, then divides that by the number of pay periods. If your employer withholds too much, you get a refund when you file your return. If they withhold too little, you owe money.

The amount withheld is not the same as your actual tax rate. It is an estimate based on the assumption that your income will stay the same throughout the year. If you have a second job, receive a bonus, or have income from investments, your actual tax bill may be higher than what was withheld. If you have major life changes — marriage, a child, a job loss — you should update your W-4 so the withholding is closer to what you will actually owe.

State and local taxes are separate from federal income tax

Federal income tax is only one part of what you owe. Most states also collect state income tax, though nine states have no state income tax at all: Alaska, Florida, Nevada, South Dakota, Tennessee, Texas, Washington, Wyoming, and New Hampshire (which taxes only dividends and interest). Some cities and counties also collect local income tax. These are calculated separately from federal tax and use their own brackets and rules.

When you see a paycheck stub, the federal withholding and state withholding are listed separately. Your total tax burden depends on where you live and work, not just on federal brackets. A person earning $60,000 in New York will owe more total income tax than someone earning the same amount in Texas, because New York has state income tax and Texas does not.

Self-employed people and estimated tax payments

If you are self-employed or have income that is not subject to withholding, you may need to make estimated tax payments to the IRS four times a year. These payments cover both federal income tax and self-employment tax (Social Security and Medicare taxes). The IRS provides a worksheet to calculate how much to pay based on your expected income for the year.

Self-employed people also pay both the employee and employer portions of Social Security and Medicare tax, which is 15.3% of net self-employment income (after deducting half of the self-employment tax itself). This is in addition to federal income tax. You can deduct business expenses, home office costs, and other work-related expenses to lower your taxable income, but you still owe estimated payments if you expect to owe $1,000 or more when you file.

Frequently Asked Questions

What is my effective tax rate versus my marginal tax rate?

Your marginal tax rate is the rate that applies to your last dollar of income — the highest bracket you fall into. Your effective tax rate is your total federal income tax divided by your total income. If you earn $60,000 and owe $8,273 in federal tax, your effective rate is about 13.8%, even though your marginal rate is 22%.

Do I have to file a federal income tax return if I did not earn much?

It depends on your income and filing status. For 2024, a single person under 65 must file if their income is $14,600 or more (the standard deduction). If you earned less but had taxes withheld, you should file to get a refund. The IRS website has a tool to determine whether you must file.

Can I reduce my federal income tax by contributing to a 401(k) or IRA?

Yes. Contributions to a traditional 401(k) or traditional IRA reduce your taxable income for the year, which lowers your federal tax bill. Contributions to a Roth 401(k) or Roth IRA do not reduce your current tax bill but grow tax-free. The IRS sets annual limits on how much you can contribute to each type of account.

What happens if I owe federal income tax and cannot pay it all at once?

The IRS offers payment plans and can work with you on a schedule. You can set up a short-term payment plan (up to 180 days) or a long-term installment agreement. Interest and penalties explore to unpaid tax, so it is better to pay what you can and contact the IRS about a plan than to ignore the bill.

Are federal income tax brackets the same every year?

The brackets adjust every year for inflation, so the income ranges change. The tax rates themselves (10%, 12%, 22%, etc.) have stayed the same since 2017, but Congress can change them. Always check the current year's brackets on the IRS website or your tax software before calculating what you owe.