Federal income tax is calculated using tax brackets, not a single flat rate
The federal government does not charge everyone the same percentage of their income. Instead, the IRS uses a progressive tax system with brackets — ranges of income that are taxed at different rates. The rate you pay depends on how much you earned and your filing status (single, married filing jointly, head of household, and so on).
For 2024, the federal tax brackets range from 10% on the lowest income to 37% on the highest. But this does not mean someone earning $100,000 pays 37% on all of it. Instead, different portions of your income are taxed at different rates as you move up through the brackets.
The brackets themselves change every year because they are adjusted for inflation. The IRS publishes new brackets in October or November for the following tax year, so the rates you see for 2024 will be different from 2025.
Key Takeaways
- Federal tax brackets for 2024 range from 10% to 37%, but you do not pay the top rate on your entire income — only on the portion that falls in that bracket.
- Your actual tax rate (called your effective tax rate) is lower than your highest bracket because income is taxed progressively from the bottom up.
- Tax brackets change every year for inflation, so the income ranges that apply to each rate are different in 2025 than they were in 2024.
- Your filing status — single, married filing jointly, head of household — determines which bracket your income falls into, so two people earning the same amount may pay different taxes.
- The standard deduction reduces your taxable income before brackets are applied, which means many people pay no federal income tax at all.
The seven federal tax brackets for 2024
The IRS divides income into seven brackets. Each bracket has its own rate, and as your income rises, portions of it move into higher brackets. Here is how it works for a single filer in 2024:
| Tax Bracket | Income Range (Single) | Tax Rate |
|---|---|---|
| 1 | $0 to $11,600 | 10% |
| 2 | $11,601 to $47,150 | 12% |
| 3 | $47,151 to $100,525 | 22% |
| 4 | $100,526 to $191,950 | 24% |
| 5 | $191,951 to $243,725 | 32% |
| 6 | $243,726 to $609,350 | 35% |
| 7 | $609,351 and above | 37% |
If you are married filing jointly, head of household, or married filing separately, your bracket ranges are different — usually wider for married filing jointly, narrower for married filing separately. The IRS publishes separate tables for each status.
The ranges shown here are for 2024 tax year income (filed in 2025). For 2025 income (filed in 2026), the IRS will publish new ranges adjusted for inflation, typically in late 2024.
How your effective tax rate differs from your bracket rate
Your marginal tax rate is the rate on your last dollar of income — the highest bracket you reach. Your effective tax rate is what you actually pay on average across all your income. These are almost never the same.
Example: A single person earning $60,000 in 2024 falls into the 22% bracket. But they do not pay 22% on all $60,000. Instead, they pay 10% on the first $11,600, then 12% on the next $35,550, then 22% on the remaining $12,850. Their total tax is roughly $7,000, which is an effective rate of about 11.7% — much lower than the 22% bracket they are in.
This is why someone can be "in the 24% bracket" but still pay less than 24% overall. The higher rates only apply to income above each threshold.
The standard deduction reduces your taxable income
Before the IRS applies tax brackets, you subtract the standard deduction from your income. This is a flat amount that depends on your filing status and age. For 2024, the standard deduction is $14,600 for single filers and $29,200 for married couples filing jointly.
This means a single person earning $30,000 does not pay tax on $30,000. They pay tax on $30,000 minus $14,600, which is $15,400. The brackets then apply to that $15,400.
The standard deduction also increases every year for inflation. For 2025, it will be higher than 2024. If your income is below the standard deduction for your filing status, you owe no federal income tax, even if you had taxes withheld from your paychecks.
How filing status affects your tax brackets
The IRS recognizes four filing statuses: single, married filing jointly, married filing separately, and head of household. Each has its own set of bracket ranges.
Married filing jointly has the widest brackets, meaning a couple can earn more before entering a higher bracket than a single person earning the same amount. Married filing separately has the narrowest brackets — sometimes narrower than single — which is why most married couples file jointly.
Head of household (for unmarried people who pay more than half the household expenses and have a dependent) falls between single and married filing jointly. Your filing status is determined by your marital status on December 31 of the tax year, and it is one of the first things you declare when you file.
Taxes withheld from your paycheck versus what you actually owe
Your employer withholds federal income tax from each paycheck based on the W-4 form you filled out. This withholding is an estimate — it is not your final tax bill. When you file your tax return, the IRS calculates what you actually owe based on your total income, deductions, and credits for the year.
If too much was withheld, you get a refund. If too little was withheld, you owe money. The tax brackets determine what you owe; the withholding just determines how much you paid throughout the year.
Self-employed people and those with investment income do not have withholding, so they must estimate their tax and pay it quarterly using Form 1040-ES. The brackets still apply the same way — they just have to calculate and pay on their own schedule.
Tax credits and deductions reduce your tax further
Tax brackets calculate your tax on your income, but you may owe less because of tax credits and deductions. Deductions (like the standard deduction, or itemized deductions) reduce the income that brackets are applied to. Credits reduce your tax bill dollar-for-dollar after brackets are applied.
Common credits include the Earned Income Tax Credit (EITC) for lower-income workers, the Child Tax Credit, and the American Opportunity Credit for education. A $1,000 credit saves you $1,000 in tax; a $1,000 deduction saves you whatever your bracket rate is (10%, 12%, 22%, and so on).
This is why two people with the same income can owe very different amounts of tax — their credits and deductions are different. The brackets are just the starting point.
Frequently Asked Questions
If I am in the 24% tax bracket, do I pay 24% on all my income?
No. The 24% rate applies only to income within that bracket range. Income below that bracket is taxed at lower rates (10%, 12%, 22%). Your effective tax rate — what you actually pay on average — is lower than your bracket rate.
Why do tax brackets change every year?
The IRS adjusts brackets annually for inflation so that wage increases due to inflation do not push you into a higher bracket. Without this adjustment, you could owe more tax even if your purchasing power stayed the same. The new brackets are published in October or November for the following tax year.
Does my filing status change my tax brackets?
Yes. Married filing jointly has wider brackets than single, so a couple can earn more before entering a higher bracket. Married filing separately has narrower brackets. Head of household falls between the two. Your status is determined by your marital status on December 31 of the tax year.
What happens if I do not earn enough to owe tax?
If your income is below the standard deduction for your filing status, you owe no federal income tax. However, if your employer withheld tax from your paychecks, you can file a return to claim a refund of that withholding.
How do tax credits affect my tax bill?
Tax credits reduce your tax bill directly, dollar-for-dollar, after your tax is calculated using the brackets. A $1,000 credit saves you $1,000 in tax, regardless of your bracket. Deductions, by contrast, reduce your income before brackets are applied, so their value depends on your bracket rate.