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 income in layers. If you earn $50,000, you do not pay the same percentage on all $50,000. Instead, you pay a lower percentage on the first portion, a higher percentage on the next portion, and so on. These layers are called tax brackets. The percentage you pay on each bracket depends on your filing status (single, married filing jointly, head of household, or married filing separately) and the year you are filing for.
The brackets change every year because they are adjusted for inflation. A bracket that was $11,000 to $44,725 in 2022 might be $11,000 to $44,725 in 2023 — the exact numbers shift annually. The IRS publishes the current year's brackets on its website before tax season begins, usually in late fall of the prior year.
Your effective tax rate — the actual percentage of your total income that goes to federal tax — is always lower than your highest bracket rate. For example, if your highest bracket is 22%, your effective rate might be 13% or 15%, because you paid lower rates on the income below that bracket.
Key Takeaways
- Federal tax brackets are progressive: you pay a different percentage on each portion of your income, not the same rate on all of it.
- Tax brackets change every year and depend on your filing status (single, married filing jointly, head of household, or married filing separately).
- Your effective tax rate is the total tax you pay divided by your total income, and it is always lower than your highest bracket rate.
- The IRS publishes the current year's brackets before tax season begins, and you can find them on IRS.gov or on your tax software.
- Self-employed people and those with investment income may owe additional federal taxes beyond income tax brackets.
How tax brackets work with an example
Suppose you are single and earned $60,000 in 2024. The 2024 brackets for single filers start at 10% on the first $11,600, then 12% on income from $11,601 to $47,150, then 22% on income from $47,151 to $100,525. Here is how your tax is calculated:
| Income Range | Your Income in That Range | Tax Rate | Tax Owed on That Portion |
|---|---|---|---|
| $0 to $11,600 | $11,600 | 10% | $1,160 |
| $11,601 to $47,150 | $35,550 | 12% | $4,266 |
| $47,151 to $100,525 | $12,850 | 22% | $2,827 |
| Total Federal Income Tax | $8,253 |
Your effective tax rate is $8,253 divided by $60,000, which is about 13.8%. Even though your income reached the 22% bracket, you did not pay 22% on all of it — only on the portion above $47,150.
Standard deduction and taxable income
Before you calculate tax using the brackets, you subtract the standard deduction from your gross income. The standard deduction is a fixed dollar amount that reduces the income the government taxes. For 2024, the standard deduction is $14,600 for single filers, $29,200 for married filing jointly, and $21,900 for head of household. These amounts increase each year.
If you earned $60,000 and are single, your taxable income is $60,000 minus $14,600, which is $45,400. You then apply the tax brackets to $45,400, not to $60,000. This is why many people with modest incomes owe little or no federal tax — their income falls below or only slightly above the standard deduction.
Some people itemize deductions instead of taking the standard deduction. Itemizing means adding up specific expenses (mortgage interest, property taxes, charitable donations, medical expenses above a threshold) and subtracting that total. You itemize only if your total itemized deductions exceed the standard deduction for your filing status. Most people take the standard deduction because it is simpler and often larger.
Credits and refundable versus non-refundable
Tax credits are different from deductions. A deduction reduces your taxable income; a credit reduces the tax you owe dollar-for-dollar. A $1,000 deduction might save you $220 in tax (if you are in the 22% bracket). A $1,000 credit saves you exactly $1,000 in tax.
A non-refundable credit can reduce your tax to zero but cannot give you a refund. If you owe $500 in tax and have a $1,000 non-refundable credit, your tax becomes zero, but you do not receive the extra $500.
A refundable credit can reduce your tax below zero and result in a refund. The Earned Income Tax Credit (EITC) and the Additional Child Tax Credit are refundable. If you owe $500 and have a $1,000 refundable credit, you receive a $500 refund.
Self-employment tax and additional federal taxes
If you are self-employed, you owe self-employment tax in addition to income tax. Self-employment tax funds Social Security and Medicare and is calculated on your net self-employment income (your business income minus business expenses). The rate is 15.3% (12.4% for Social Security on income up to a cap, and 2.9% for Medicare on all income). You pay this even if your income is below the standard deduction.
You may also owe federal tax on investment income — capital gains, dividends, and interest — if that income exceeds certain thresholds. Long-term capital gains (assets held over one year) are taxed at 0%, 15%, or 20% depending on your income level, which is often lower than ordinary income tax rates. Short-term capital gains (assets held one year or less) are taxed as ordinary income.
Where to find current tax brackets
The IRS publishes tax brackets for the current year on IRS.gov under "Tax Brackets and Rates." You can also find them in the instructions for Form 1040 (the main federal income tax form) or in most tax preparation software. If you file taxes yourself using software like TurboTax, H&R Block, or TaxAct, the software automatically applies the current year's brackets — you do not have to look them up.
State and local taxes are separate from federal tax and vary by location. This article covers federal tax only. Your state may have its own income tax, and your city or county may have a local income tax or wage tax. You will owe all three if you live in a place that has them.
Frequently Asked Questions
What is the highest federal tax bracket for 2024?
The highest federal income tax bracket is 37%, which applies to income above $578,100 for single filers and $693,750 for married filing jointly in 2024. These thresholds change annually. However, most people never reach this bracket — it applies only to very high earners.
Do I owe federal tax if I earn below the standard deduction?
No, if your gross income is below the standard deduction for your filing status, you owe no federal income tax. However, if you are self-employed, you may owe self-employment tax even if your income is below the standard deduction. You should still file a return if you had taxes withheld from paychecks, because you may receive a refund.
Why is my tax refund smaller than I expected?
Your refund depends on how much tax was withheld from your paychecks throughout the year, not on your tax bracket. If you earned more than expected or had less withheld, your refund will be smaller. You can adjust your withholding by filling out a new Form W-4 with your employer.
Are capital gains taxed the same as regular income?
Long-term capital gains (from assets held over one year) are taxed at 0%, 15%, or 20% depending on your total income, which is usually lower than ordinary income tax rates. Short-term capital gains are taxed as ordinary income at your regular bracket rate. Dividends may also may have access to for lower rates depending on the type.