Federal income tax is not one flat rate — it is a series of brackets, and you pay a different percentage on each chunk of your income
The federal government taxes your income in layers. If you earn $50,000, you do not pay the same tax rate on every dollar. Instead, you pay a lower rate on the first portion, a higher rate on the next portion, and so on. This system is called tax brackets. The rate that applies to your last dollar earned is your marginal tax rate. The average rate you pay across all your income is your effective tax rate — and it is always lower than your marginal rate.
The brackets themselves change every year because they are adjusted for inflation. They also depend on your filing status: single, married filing jointly, married filing separately, or head of household. A married couple filing together reaches higher income levels before hitting the top bracket than a single person does.
Your actual tax bill also depends on deductions and credits, which reduce the income you are taxed on or reduce the tax itself. Most people take the standard deduction — a flat amount set by the IRS each year — rather than itemizing deductions. For 2024, the standard deduction is $14,600 for single filers and $29,200 for married couples filing jointly, but these amounts change annually.
Key Takeaways
- Tax brackets mean you pay different rates on different portions of your income, not one rate on everything you earn.
- Your marginal tax rate (the rate on your last dollar) is higher than your effective tax rate (your average rate across all income).
- The standard deduction reduces the income you are taxed on; for 2024 it is $14,600 for single filers and $29,200 for married couples filing jointly.
- Tax brackets and the standard deduction change every year and vary by filing status.
- Credits like the Earned Income Tax Credit can reduce your tax bill dollar-for-dollar, while deductions only reduce the income you are taxed on.
The 2024 federal tax brackets for each filing status
The IRS publishes new brackets each year. The brackets below are for 2024 tax returns (filed in 2025). They show the income ranges and the rate that applies to income within each range.
| Tax Rate | Single | Married Filing Jointly | Head of Household |
|---|---|---|---|
| 10% | $0 to $11,600 | $0 to $23,200 | $0 to $16,550 |
| 12% | $11,601 to $47,150 | $23,201 to $94,300 | $16,551 to $63,100 |
| 22% | $47,151 to $100,525 | $94,301 to $201,050 | $63,101 to $100,500 |
| 24% | $100,526 to $191,950 | $201,051 to $383,900 | $100,501 to $191,950 |
| 32% | $191,951 to $243,725 | $383,901 to $487,450 | $191,951 to $243,700 |
| 35% | $243,726 to $609,350 | $487,451 to $731,200 | $243,701 to $609,350 |
| 37% | $609,351+ | $731,201+ | $609,351+ |
These brackets apply to ordinary income — wages, salary, and self-employment income. Long-term capital gains (profits from selling investments held over a year) are taxed at lower rates: 0%, 15%, or 20%, depending on your income level.
How to calculate your tax using brackets
Suppose you are single and earned $60,000 in 2024. First, subtract the standard deduction: $60,000 minus $14,600 equals $45,400 of taxable income. Now apply the brackets.
The first $11,600 is taxed at 10%: $11,600 × 0.10 = $1,160. The next portion, from $11,601 to $45,400, is taxed at 12%: ($45,400 − $11,600) × 0.12 = $33,800 × 0.12 = $4,056. Your total federal income tax is $1,160 + $4,056 = $5,216. Your effective tax rate is $5,216 ÷ $60,000 = 8.7%, even though your marginal rate is 12%.
If you have dependents or meet other conditions, you may also owe less tax because of credits. The Earned Income Tax Credit, for example, can reduce your tax bill by hundreds or thousands of dollars if you work and earn below a certain income threshold. Unlike deductions, credits reduce your tax dollar-for-dollar.
Why your paycheck shows less than your salary
Your employer withholds federal income tax from each paycheck based on a formula tied to your W-4 form. The withholding is an estimate — it is meant to come close to what you will actually owe when you file your return. If too much is withheld, you get a refund. If too little is withheld, you owe money when you file.
Withholding also depends on other income you receive, whether you have dependents, and whether you claim other deductions or credits. If you have a spouse who works, or if you have a second job, the withholding from one employer may not account for the other income, and you could end up owing tax at filing time.
Self-employment income and additional taxes
If you are self-employed, you pay federal income tax on your net profit (revenue minus business expenses) using the same brackets as everyone else. You also pay self-employment tax, which funds Social Security and Medicare. Self-employment tax is 15.3% on 92.35% of your net profit — roughly 14.1% of your net profit overall. This is separate from and in addition to federal income tax.
Self-employed people do not have an employer withholding tax, so they usually make quarterly estimated tax payments to the IRS. If you do not pay enough throughout the year, you may owe a penalty when you file your return, even if you ultimately get a refund.
Deductions and credits that lower your tax bill
A deduction reduces the income you are taxed on. The standard deduction is the simplest: you subtract it from your gross income, and you are taxed only on what remains. Some people itemize deductions instead — listing mortgage interest, property taxes, charitable donations, and medical expenses — if those add up to more than the standard deduction.
A credit reduces your tax bill directly. The Earned Income Tax Credit is the largest for low-income workers. The Child Tax Credit is $2,000 per child under 17. The American Opportunity Tax Credit helps with education costs. Unlike deductions, credits are worth their full amount because they subtract from your tax, not from your income.
Frequently Asked Questions
If I earn more money, will I pay tax on all of it at a higher rate?
No. Only the income that falls into a higher bracket is taxed at that higher rate. If you are single and earn $50,000, and then earn an extra $10,000, the extra $10,000 is taxed at your marginal rate for that income level — but your first $50,000 is still taxed at the same rates as before. This is why moving into a higher bracket does not mean your entire paycheck is taxed more.
Why do I owe money at tax time if my employer is withholding taxes?
Withholding is an estimate based on the information on your W-4 form. If you have multiple jobs, a spouse who works, or income from other sources, the withholding from one employer may not account for all your income. You can adjust your W-4 to increase withholding, or you can make quarterly estimated payments if you have self-employment income or other income not subject to withholding.
Does the standard deduction mean I pay no tax on that amount?
Yes. The standard deduction is subtracted from your gross income before tax is calculated. If you earn $30,000 and the standard deduction is $14,600, you pay tax only on $15,400. Income below the standard deduction is not taxed at all, which is why many low-income people owe no federal income tax.
Are capital gains taxed the same way as wages?
No. Long-term capital gains (profits from selling investments held over a year) are taxed at lower rates: 0%, 15%, or 20%, depending on your total income. Short-term capital gains (held a year or less) are taxed as ordinary income using the regular brackets. This is why investment income is often taxed less heavily than wages.
What happens if I do not pay enough tax during the year?
When you file your return, if you owe more than you paid through withholding or estimated payments, you must pay the difference. The IRS may also charge a penalty for underpayment if you owe a large amount. You can avoid this by adjusting your W-4 or making quarterly estimated tax payments if you have self-employment income.