Federal income tax is calculated using tax brackets, not a single flat rate
The federal government taxes your income using a system of brackets. Each bracket covers a range of income, and you pay a different percentage on income that falls within each range. The percentage increases as your income goes higher. You do not pay the highest rate on all your income — only on the portion that falls into that bracket.
For example, if you are single and earned $50,000 in 2024, you would not pay 22% on the entire amount. Instead, you would pay 10% on the first portion, 12% on the next portion, and 22% only on the income above a certain threshold. This is called your marginal tax rate — the rate you pay on your last dollar of income — and it is different from your effective tax rate, which is the average rate you pay on all your income.
Key Takeaways
- Federal tax brackets for 2024 range from 10% to 37%, and the bracket you fall into depends on your total income and filing status.
- Your effective tax rate (what you actually pay on average) is always lower than your marginal tax rate (the highest bracket you reach).
- The IRS adjusts tax brackets each year for inflation, so the income thresholds that determine which bracket you are in change annually.
- Your W-4 form at work tells your employer how much to withhold from each paycheck, and you settle the actual amount owed when you file your return.
- Self-employed people pay both the employee and employer portions of Social Security and Medicare taxes, which adds roughly 15.3% on top of income tax.
The 2024 federal tax brackets for each filing status
The IRS publishes new brackets every year. The brackets below are for the 2024 tax year (the return you file in 2025). The percentages apply to taxable income, which is your total income minus deductions.
| Filing Status | 10% Bracket | 12% Bracket | 22% Bracket | 24% Bracket | 32% Bracket | 35% Bracket | 37% Bracket |
|---|---|---|---|---|---|---|---|
| Single | $0–$11,600 | $11,601–$47,150 | $47,151–$100,525 | $100,526–$191,950 | $191,951–$243,725 | $243,726–$609,350 | $609,351+ |
| Married Filing Jointly | $0–$23,200 | $23,201–$94,300 | $94,301–$201,050 | $201,051–$383,900 | $383,901–$487,450 | $487,451–$731,200 | $731,201+ |
| Head of Household | $0–$17,400 | $17,401–$66,550 | $66,551–$100,525 | $100,526–$191,950 | $191,951–$243,700 | $243,701–$609,350 | $609,351+ |
| Married Filing Separately | $0–$11,600 | $11,601–$47,150 | $47,151–$100,525 | $100,526–$191,950 | $191,951–$243,725 | $243,726–$365,600 | $365,601+ |
These thresholds change each year. The IRS adjusts them for inflation, so the income ranges shift upward annually. Check the IRS website or your tax software for the current year's brackets before you calculate your tax.
How to calculate your tax using brackets
Start with your taxable income. This is your total income (wages, self-employment earnings, interest, dividends, and other sources) minus either the standard deduction or your itemized deductions, whichever is larger. For 2024, the standard deduction is $14,600 for single filers and $29,200 for married couples filing jointly.
Once you have your taxable income, find which bracket it falls into and calculate the tax on each portion. If you are single with $60,000 in taxable income, you would calculate: 10% on the first $11,600, plus 12% on the next $35,550 (from $11,601 to $47,150), plus 22% on the remaining $12,850 (from $47,151 to $60,000). That totals $1,160 + $4,266 + $2,827 = $8,253. Your effective tax rate is $8,253 ÷ $60,000 = 13.8%.
Most people do not calculate this by hand. Your tax software or a tax preparer will do it. What matters is understanding that you pay different rates on different portions of your income, and your actual tax bill is lower than the highest bracket you reach.
Standard deduction versus itemized deductions
Before the IRS applies tax brackets to your income, you subtract either the standard deduction or your itemized deductions. The standard deduction is a flat amount set by the IRS each year. For 2024, it is $14,600 for single filers, $29,200 for married couples filing jointly, and $21,900 for heads of household.
Itemized deductions are specific expenses you can deduct instead of the standard deduction: mortgage interest, property taxes, charitable donations, and medical expenses above a certain threshold. You itemize only if your total itemized deductions exceed the standard deduction. Most people take the standard deduction because it is simpler and often larger.
The deduction you choose directly lowers your taxable income. If you earn $60,000 and take the standard deduction of $14,600, your taxable income is $45,400. If you itemize and your deductions total $20,000, your taxable income is $40,000. The lower your taxable income, the less tax you owe.
How withholding and refunds work
If you work for an employer, your employer withholds federal income tax from each paycheck based on the information you provide on your W-4 form. The W-4 asks about your filing status, number of dependents, and other income. Your employer uses this to estimate how much tax you will owe for the year and spreads that across your paychecks.
When you file your tax return, you report your actual income and calculate your actual tax. If your employer withheld more than you owe, you receive a refund. If your employer withheld less, you owe the difference. Most people receive a refund because they claim fewer dependents on the W-4 than they actually have, which causes their employer to withhold more than necessary.
You can adjust your W-4 at any time during the year if you realize your withholding is off. If you are getting a large refund every year, you can claim more allowances to reduce withholding and take home more pay each month. If you owe money at tax time, you can claim fewer allowances to increase withholding.
Self-employment tax on top of income tax
If you are self-employed, you pay both income tax and self-employment tax. Self-employment tax covers Social Security and Medicare. An employee normally pays half of this (7.65%) and the employer pays the other half. When you are self-employed, you pay both halves, which totals 15.3% of your net self-employment income.
You calculate self-employment tax on Schedule SE and add it to your income tax. You can deduct half of your self-employment tax when you calculate your adjusted gross income, which lowers your taxable income slightly. Self-employment tax is separate from income tax and applies even if your income is too low to owe income tax.
If you earn $30,000 in self-employment income, you would owe roughly $4,243 in self-employment tax (15.3% of $30,000, minus the deductible half). You would then owe income tax on top of that, calculated using the brackets above.
Credits and deductions that lower your tax bill
Tax credits directly reduce the tax you owe, dollar for dollar. A $1,000 credit lowers your tax bill 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. Credits are more valuable than deductions because they reduce your tax directly rather than reducing your taxable income.
Deductions reduce your taxable income, which then reduces your tax based on your bracket. If you are in the 22% bracket and claim a $1,000 deduction, you save $220 in tax. The same deduction saves someone in the 12% bracket only $120. This is why higher-income people benefit more from deductions than lower-income people do.
When you file your return, you report all credits and deductions you are may have access to to. Tax software walks you through the questions and calculates the benefit automatically. The IRS publishes a full list of available credits and deductions on its website.
Frequently Asked Questions
Why do I owe money at tax time if my employer is withholding taxes?
Your employer estimates your tax based on the W-4 you filled out, but the estimate may be wrong. If you have a second job, significant investment income, or claimed too many dependents on your W-4, your withholding will be too low. You settle the actual amount owed when you file your return. Adjust your W-4 if you owe money regularly.
Does everyone pay federal income tax?
No. If your income is below the standard deduction for your filing status, you owe no federal income tax. For 2024, a single person with income below $14,600 owes no tax. However, you may still need to file to claim refundable credits like the Earned Income Tax Credit, which can result in a refund even if you owe no tax.
What is the difference between my tax bracket and my effective tax rate?
Your tax bracket is the highest rate you pay, applied only to income in that range. Your effective tax rate is your total tax divided by your total income. If you earn $60,000 and owe $8,253 in tax, your effective rate is 13.8%, even though your bracket is 22%. Your effective rate is always lower because you pay lower rates on the income below your bracket.
Do state and local taxes work the same way as federal tax?
Most states use a bracket system similar to federal tax, but the brackets and rates vary by state. Some states have no income tax at all. Local taxes vary widely. Your total tax bill includes federal, state, and local taxes. Tax software calculates all three when you file.
Can I reduce my federal income tax by contributing to a retirement account?
Yes. Contributions to a traditional 401(k) or traditional IRA reduce your taxable income, which lowers your federal tax. Contributions to a Roth 401(k) or Roth IRA do not reduce your current tax but grow tax-free. The amount you can contribute and deduct depends on your income and the type of account. Check with your employer or a tax professional about your options.