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 using tax brackets, which means the percentage you pay increases as your income goes up. You don't pay one rate on all your money. Instead, you pay 10% on the first chunk, then 12% on the next chunk, then 22% on the next, and so on. The highest bracket for 2024 is 37%, but most people never pay that rate on their entire income — they pay it only on the dollars that fall into that top bracket.

The brackets change every year because they're adjusted for inflation. They also depend on your filing status: single filers, married couples filing jointly, heads of household, and married people filing separately each have their own bracket ranges. This means two people earning the same amount might owe different taxes based on how they file.

Your employer withholds federal income tax from each paycheck based on a calculation using your W-4 form. That withholding is an estimate — it's not your final tax bill. When you file your tax return, you either get a refund if too much was withheld, or you owe more if too little was taken out.

Key Takeaways

  • The federal tax system uses brackets where you pay 10%, 12%, 22%, 24%, 32%, 35%, or 37% depending on which portion of your income falls into each bracket.
  • The bracket ranges change each year for inflation and differ based on whether you file as single, married filing jointly, head of household, or married filing separately.
  • You don't pay the top bracket rate on all your income — only on the dollars that actually fall into that bracket.
  • Your employer estimates your tax withholding using your W-4 form, but your actual tax bill is calculated when you file your return.

The seven federal tax brackets for 2024

For the 2024 tax year, there are seven federal income tax brackets. The rates are 10%, 12%, 22%, 24%, 32%, 35%, and 37%. Each bracket covers a range of income, and once your income moves into the next bracket, only the money in that new bracket is taxed at the higher rate.

For a single filer in 2024, the brackets work like this: 10% on income up to $11,600; 12% on income from $11,601 to $47,150; 22% on income from $47,151 to $100,525; 24% on income from $100,526 to $191,950; 32% on income from $191,951 to $243,725; 35% on income from $243,726 to $609,350; and 37% on income over $609,350. For married couples filing jointly, the ranges are wider — for example, the 10% bracket goes up to $23,200, and the 12% bracket extends to $94,300.

These numbers shift every year. The IRS announces the new brackets in October or November for the following tax year. If you earned $50,000 as a single filer in 2024, you would pay 10% on the first $11,600, then 12% on the remaining $38,400 — not 12% on all $50,000.

How tax brackets actually work with an example

Let's say you're single and earned $60,000 in 2024. You don't pay 22% on the whole amount. Instead, you calculate it in layers. The first $11,600 is taxed at 10% (that's $1,160). The next $35,550 (from $11,601 to $47,150) is taxed at 12% (that's $4,266). The remaining $12,850 (from $47,151 to $60,000) is taxed at 22% (that's $2,827). Your total federal income tax would be roughly $8,253, which is about 13.8% of your income — much lower than the 22% bracket you're in.

This is why people sometimes say "I don't want a raise because I'll move into a higher tax bracket." That's a misunderstanding. Moving into a higher bracket only means the dollars above the threshold are taxed at the higher rate. Your raise is never fully taxed at the new rate, so you always come out ahead with more income.

Your effective tax rate is what you actually pay as a percentage of your total income. In the example above, it's 13.8%. Your marginal tax rate is the rate on your last dollar earned — in this case, 22%. These are two different numbers, and it's important to know which one people mean when they talk about "your tax rate."

Standard deduction and taxable income

Before the brackets explore, you subtract the standard deduction from your income. This is a set amount that reduces the income the government taxes. For 2024, the standard deduction is $13,850 for single filers, $27,700 for married couples filing jointly, and $20,800 for heads of household. These amounts also change each year.

So if you earned $60,000 as a single filer, you would subtract $13,850, leaving $46,150 in taxable income. That's the number you explore the brackets to, not the full $60,000. This is why many people with modest incomes owe little or no federal income tax — their income falls below or just barely above the standard deduction.

Some people itemize deductions instead of taking the standard deduction, which means they add up specific expenses like mortgage interest, state taxes, or charitable donations. Itemizing only makes sense if your total deductions exceed the standard deduction for your filing status. Most people use the standard deduction because it's simpler and often larger.

Credits and withholding

Tax credits are different from deductions. A tax credit reduces your tax bill dollar-for-dollar, while a deduction reduces your taxable income. A $1,000 credit saves you $1,000 in taxes. A $1,000 deduction saves you $1,000 times your tax rate — so if you're in the 22% bracket, a $1,000 deduction saves you $220.

Common federal tax credits include the Earned Income Tax Credit (EITC) for lower-income workers, the Child Tax Credit for parents, and the American Opportunity Credit for students. These can significantly reduce or even eliminate your tax bill, or result in a refund if the credit is larger than the tax you owe.

Your employer withholds federal income tax from your paycheck based on the W-4 form you fill out. The withholding is calculated to estimate your final tax bill, but it's rarely exact. When you file your return, you report your actual income, deductions, and credits. If you withheld too much, you get a refund. If you withheld too little, you owe the difference.

How filing status affects your brackets

Your filing status determines which bracket ranges explore to you. Married couples filing jointly have the widest brackets, which means they can earn more income in each bracket before moving to the next one. This is sometimes called the "marriage bonus" — two married people filing together often pay less total tax than two single people earning the same amounts.

Married couples filing separately use the same bracket ranges as single filers, which usually results in a higher combined tax bill than filing jointly. Head of household status (for unmarried people supporting dependents) falls between single and married filing jointly. The IRS defines each status strictly, so you can't choose whichever sounds best — your situation determines which one applies.

Your filing status also affects your standard deduction amount and your may be able to access for certain credits. This is why it's important to get it right on your return, and why people in complex situations sometimes benefit from talking to a tax professional.

State and local income taxes are separate

Federal income tax is only one part of the income tax you might owe. Most states also collect income tax, and some cities do as well. State tax rates and brackets are completely separate from federal rates. A few states — Alaska, Florida, Nevada, South Dakota, Tennessee, Texas, Washington, and Wyoming — don't have a state income tax at all.

State tax brackets work the same way as federal brackets: you pay different rates on different portions of your income. But the rates and ranges are set by each state. Your federal withholding and your state withholding are calculated separately on your paycheck. When you file your taxes, you file both a federal return and a state return (if your state requires one).

Some people are confused about whether federal and state taxes are combined. They're not. If you owe 22% federal tax and 5% state tax, you owe both — they don't replace each other. Your total tax bill is the sum of all the taxes you owe.

Frequently Asked Questions

If I'm in the 24% tax bracket, do I pay 24% on all my income?

No. The 24% bracket only applies to the portion of your income that falls within that bracket's range. All the income below that bracket is taxed at the lower rates. Your overall tax rate (called your effective rate) is much lower than your bracket rate.

Do the tax brackets change every year?

Yes. The IRS adjusts the bracket ranges each year for inflation. The rates themselves (10%, 12%, 22%, etc.) stay the same, but the income ranges that fall into each bracket shift upward. The new brackets are announced in October or November for the following tax year.

What's the difference between my marginal rate and my effective rate?

Your marginal rate is the tax rate on your last dollar earned — the bracket your income currently falls into. Your effective rate is your total tax bill divided by your total income. For most people, the effective rate is much lower than the marginal rate because lower-income dollars are taxed at lower rates.

Does a higher income always mean I owe more tax?

Generally yes, but not always by the same percentage. Earning more income moves you into higher brackets, so you pay a higher percentage on those additional dollars. However, tax credits can reduce or eliminate your bill. Some people with higher incomes owe less tax than people with lower incomes because of credits or deductions.

Can I choose my filing status, or is it determined by my situation?

The IRS defines which filing status applies based on your marital status and dependents on the last day of the tax year. You can't choose single if you're married, for example. However, married couples can choose to file jointly or separately, though filing jointly usually results in a lower combined tax bill.