Federal income tax is calculated using tax brackets, not a single rate across all your income
The federal government does not charge one flat percentage on everything you earn. Instead, your income is divided into chunks, and each chunk is taxed at a different rate. The lowest bracket for 2024 is 10 percent, and the highest is 37 percent — but most people never pay 37 percent on all their income. You only pay that rate on the portion of income that falls into that bracket.
The brackets themselves change every year because they are adjusted for inflation. A single filer in 2024 pays 10 percent on income up to $11,600, then 12 percent on income from $11,601 to $47,150, and so on. A married couple filing jointly has wider brackets — 10 percent up to $23,200. The exact dollar amounts depend on your filing status and the year.
Your effective tax rate — the percentage of your total income that actually goes to federal tax — is almost always lower than your highest bracket. If you are in the 22 percent bracket, you are not paying 22 percent on all your income; you are paying 10 percent on the first chunk, 12 percent on the next, and 22 percent only on the portion that falls into that bracket.
Key Takeaways
- Federal income tax uses seven brackets ranging from 10 percent to 37 percent, and each bracket applies only to the income within that range, not to all your income.
- Tax brackets are adjusted annually for inflation, so the dollar amounts change every year even if the percentages stay the same.
- Your effective tax rate — what you actually pay as a percentage of total income — is lower than your marginal rate, which is the rate on your last dollar earned.
- Your filing status (single, married filing jointly, head of household, or married filing separately) determines which bracket thresholds explore to you.
- Deductions and credits reduce the income you owe tax on or reduce the tax itself, which is why two people earning the same amount may owe different amounts.
The seven federal tax brackets for 2024
The Internal Revenue Service publishes the brackets each year. For 2024, a single filer faces these rates:
| Tax Rate | Income Range (Single) | Income Range (Married Filing Jointly) |
|---|---|---|
| 10% | $0 to $11,600 | $0 to $23,200 |
| 12% | $11,601 to $47,150 | $23,201 to $94,300 |
| 22% | $47,151 to $100,525 | $94,301 to $201,050 |
| 24% | $100,526 to $191,950 | $201,051 to $383,900 |
| 32% | $191,951 to $243,725 | $383,901 to $487,450 |
| 35% | $243,726 to $609,350 | $487,451 to $731,200 |
| 37% | $609,351 and above | $731,201 and above |
These brackets explore to ordinary income — wages, salary, interest, and most other sources. Long-term capital gains and may have access to dividends are taxed at different, usually lower rates. The brackets also shift slightly for head of household and married filing separately filers.
Because these amounts are adjusted for inflation each year, the 2025 brackets will be different. The IRS announces the new brackets in late October or early November of the prior year.
How to calculate what you owe using brackets
Suppose you are single and earned $60,000 in 2024. You do not owe 22 percent on all $60,000. Instead, you calculate it in layers:
- First $11,600 at 10 percent = $1,160
- Next $35,550 (from $11,601 to $47,150) at 12 percent = $4,266
- Remaining $12,850 (from $47,151 to $60,000) at 22 percent = $2,827
- Total tax before credits or deductions = $8,253
Your effective rate is $8,253 divided by $60,000, or about 13.8 percent. Your marginal rate — the rate on your last dollar — is 22 percent. This is why people sometimes say "I am in the 22 percent bracket" even though they do not pay 22 percent on everything.
In practice, you do not calculate this yourself. Your employer withholds tax from each paycheck based on the W-4 form you fill out, and the IRS has tables that do this calculation. When you file your tax return, the actual amount owed is recalculated based on your real income and any deductions or credits you claim.
Deductions and credits that lower your tax bill
The amount you owe depends not just on your income but also on deductions and credits. A deduction reduces the income you owe tax on. A credit reduces the tax itself, dollar for dollar.
The standard deduction is the simplest route for most people. For 2024, a single filer can deduct $14,600 from income before calculating tax. A married couple filing jointly can deduct $29,200. This means if you earn $60,000 as a single filer, you only owe tax on $45,400 ($60,000 minus $14,600). The brackets then explore to that $45,400, not the full $60,000.
Some people itemize deductions instead — listing mortgage interest, state and local taxes, charitable donations, and other expenses. You itemize only if your total itemized deductions exceed the standard deduction for your filing status.
Credits are more valuable because they reduce tax directly. The Earned Income Tax Credit, for example, can reduce your tax bill or result in a refund if you earn below a certain threshold. The Child Tax Credit reduces tax by $2,000 per may have access to child. Unlike deductions, credits do not depend on brackets.
Why your withholding might not match what you owe
Your employer withholds federal tax from each paycheck based on the W-4 form you complete. The withholding is an estimate — it assumes you will earn the same amount every pay period for the whole year and that you have no other income or major deductions.
If your actual situation differs, you may owe more or less when you file your return. You might have earned a bonus, taken a second job, received investment income, or claimed dependents. You might have made large charitable donations or paid significant mortgage interest. All of these change what you actually owe.
When you file your return, the IRS compares what you withheld to what you actually owe. If you withheld too much, you get a refund. If you withheld too little, you owe the difference. Adjusting your W-4 during the year — if you know your withholding is off — can prevent a large bill or refund at tax time.
State and local income tax is separate from federal tax
Federal income tax is only one layer. Most states also charge income tax, and some cities do as well. These are calculated separately using their own brackets and rules. A few states — Alaska, Florida, Nevada, South Dakota, Tennessee, Texas, Washington, and Wyoming — do not charge state income tax at all.
Your federal withholding and your state withholding are separate. The W-4 form you fill out for your employer controls federal withholding. Most states have their own withholding forms, often called a state W-4 or equivalent. If you move to a new state or your situation changes, you may need to update both forms.
Frequently Asked Questions
If I am in the 24 percent tax bracket, do I pay 24 percent on all my income?
No. The 24 percent rate applies only to income that falls within that bracket. All income below that bracket is taxed at the lower rates for those brackets. Your effective tax rate — the percentage of your total income that goes to federal tax — is lower than 24 percent.
Do tax brackets change every year?
Yes. The IRS adjusts the dollar amounts in each bracket annually for inflation. The percentages (10 percent, 12 percent, 22 percent, and so on) stay the same, but the income ranges shift. The new brackets are announced in late fall for the following year.
What is the difference between a deduction and a credit?
A deduction reduces the income you owe tax on. A credit reduces your tax bill directly. A $1,000 deduction saves you money based on your tax bracket — roughly $100 to $370 depending on your bracket. A $1,000 credit saves you exactly $1,000.
Why do I owe money at tax time if my employer withholds taxes?
Your employer's withholding is an estimate based on the information you provide on your W-4. If your actual income, deductions, or credits differ from what your employer assumed, you may owe more or less. Updating your W-4 during the year can help align your withholding with what you actually owe.
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 lower rates: 0 percent, 15 percent, or 20 percent, depending on your income. Short-term capital gains are taxed as ordinary income using the regular brackets. This is why investment income is often taxed differently than wages.