Federal income tax is a percentage of your earnings that the government takes out of your paycheck, and the percentage changes depending on how much you earn

The federal government taxes income on a sliding scale. The more you earn, the higher the percentage of tax you pay. This is called a progressive tax system. You do not pay one flat rate on all your income — instead, your income is divided into brackets, and each bracket has its own tax rate. For 2024, those rates range from 10% on the lowest bracket to 37% on the highest.

The key thing to understand: you do not pay the top rate on all your money. If you earn $50,000, you do not pay 22% on the entire $50,000. Instead, the first chunk of your income is taxed at 10%, the next chunk at 12%, and so on, until you reach the bracket your total income falls into. This is why your effective tax rate — the actual percentage you pay on your total income — is always lower than your marginal tax rate, which is the rate on your last dollar earned.

Key Takeaways

  • Federal tax brackets for 2024 range from 10% to 37%, but you only pay the higher rate on income that falls into that bracket, not on all your earnings.
  • Your paycheck is reduced by federal income tax withholding, which your employer calculates based on the W-4 form you filled out when you were hired.
  • The amount withheld is an estimate; you may owe more tax when you file your return in April, or you may receive a refund if too much was taken out.
  • Your filing status (single, married, head of household) and the number of dependents you claim both change which bracket applies to your income.
  • Self-employed people pay federal income tax plus an additional 15.3% self-employment tax, which covers Social Security and Medicare.

The 2024 Tax Brackets and Rates

Tax brackets change each year based on inflation. For the 2024 tax year (filed in April 2025), the brackets depend on your filing status. A single person with $50,000 in income falls into a different bracket than a married couple filing jointly with the same income.

For a single filer in 2024, the brackets are: 10% on income up to $11,600; 12% from $11,601 to $47,150; 22% from $47,151 to $100,525; and so on, up to 37% on income over $578,100. For married couples filing jointly, the income ranges are roughly double. Head of household filers have their own brackets, which fall between single and married rates.

These numbers change every year. The Internal Revenue Service (IRS) publishes updated brackets in the fall for the following tax year. If you want to know the exact brackets for the year you are filing, the IRS website has a table, or you can ask your tax preparer.

How Withholding Works on Your Paycheck

Your employer does not wait until April to collect federal income tax. Instead, they withhold an amount from each paycheck based on a calculation tied to the W-4 form you completed when you started the job. The W-4 asks for your filing status, number of dependents, and any additional income or deductions you expect.

Your employer uses that information to estimate how much federal tax you will owe for the year, then divides that by the number of pay periods and takes that amount out of each check. If you earn $3,000 per month and your withholding is set to $400 per paycheck, you will see $400 less in your bank account each month.

The withholding is an estimate. It is based on the assumption that you will earn the same amount every month for the full year. If your income changes, if you get married, if you have a child, or if you take a second job, your withholding may no longer be accurate. You can update your W-4 at any time by giving a new form to your employer's payroll department.

Why You Might Owe Money or Get a Refund

When you file your tax return in April, you report all the income you actually earned that year and calculate the tax you actually owe. The IRS then compares that to the total amount your employer withheld from your paychecks.

If you withheld too much, you receive a refund. If you withheld too little, you owe the difference. This is why two people earning the same salary can have very different tax outcomes: one might have adjusted their W-4 correctly and owe nothing, while the other might have claimed too many exemptions and now owes $2,000.

Common reasons your withholding might be off: you got married or divorced; you had a child; you earned income from a side job that was not subject to withholding; you received a large bonus; or you worked only part of the year. Any of these can throw off the estimate your employer calculated.

Self-Employment Tax Is Different

If you are self-employed — a freelancer, contractor, or small business owner — you do not have an employer withholding taxes for you. Instead, you are responsible for paying federal income tax yourself, usually through quarterly estimated tax payments to the IRS.

Self-employed people also pay self-employment tax, which is 15.3% of your net earnings. This covers Social Security and Medicare, the same programs that are funded by payroll taxes for employees. An employee and employer each pay 7.65%, but a self-employed person pays both halves.

If you are self-employed, you will need to track your income and expenses throughout the year, calculate your estimated tax liability, and send payments to the IRS in April, June, September, and January. Many self-employed people work with a tax preparer or accountant to get this right, because the rules are more complex than they are for W-2 employees.

How Deductions and Credits Change Your Tax Rate

Your taxable income — the number the tax brackets actually apply to — is not the same as your total earnings. You can reduce your taxable income by taking deductions. The most common is the standard deduction, which is a flat amount you can subtract from your income before tax is calculated.

For 2024, the standard deduction is $14,600 for single filers and $29,200 for married couples filing jointly. If you earn $50,000 as a single person, your taxable income is $50,000 minus $14,600, or $35,400. The tax brackets then apply to that $35,400, not the full $50,000.

You can also reduce your tax bill with tax credits, which are different from deductions. A credit directly reduces the tax you owe, dollar for dollar. The Earned Income Tax Credit (EITC) and the Child Tax Credit are the most common. These can lower your federal tax bill significantly, and in some cases you can receive money back even if you owe no tax.

State and Local Taxes Are Separate

Federal income tax is only one piece of the tax picture. Most states also collect income tax, and some cities do as well. Your state tax rate and brackets are completely separate from federal rates. Some states have no income tax at all — Alaska, Florida, Nevada, South Dakota, Tennessee, Texas, Washington, and Wyoming do not tax income.

Your paycheck stub will show federal withholding and state withholding as separate line items. The federal percentage does not include state tax. If you move to a different state, your state withholding will change, but your federal withholding stays the same unless you update your W-4.

Frequently Asked Questions

Does everyone pay the same federal tax rate?

No. The rate depends on how much you earn and your filing status. Two people earning the same income might pay different rates if one is single and the other is married filing jointly, because the brackets are different. Additionally, deductions and credits can lower your taxable income, which changes the rate you effectively pay.

What is the difference between my withholding and what I actually owe?

Withholding is an estimate your employer makes based on your W-4. What you actually owe is calculated when you file your return and report all your real income, deductions, and credits for the year. If the estimate was too high, you get a refund; if it was too low, you owe the difference.

Can I change my federal tax withholding?

Yes. You can fill out a new W-4 form and give it to your employer's payroll department at any time. This is useful if your income changes, you get married or divorced, you have a child, or you realize you are withholding too much or too little.

Do I pay federal tax on all types of income?

Most income is taxable, including wages, self-employment income, interest, and dividends. Some types of income are not taxed federally, such as certain gifts, inheritances, and life insurance proceeds. Your tax return will specify which types of income you must report.

What happens if I do not pay federal income tax?

If you owe tax and do not pay it, the IRS can charge penalties and interest, place a lien on your property, or garnish your wages. If you cannot pay the full amount, you can contact the IRS to set up a payment plan or request an offer in compromise, which may allow you to settle for less than you owe.