What an income tax rate is

An income tax rate is the percentage of your earnings that goes to federal, state, or local taxes. The rate you pay depends on how much money you made that year — the more you earn, the higher the percentage. The United States uses a progressive tax system, which means your income is divided into brackets, and each bracket has its own rate. You do not pay the top rate on all your income; you pay the lower rate on the first portion, then move up to higher rates only on the money above each threshold.

For example, if the first bracket is taxed at 10 percent and covers income up to $11,000, and the next bracket is 12 percent and covers $11,000 to $44,725, then someone earning $30,000 pays 10 percent on the first $11,000 and 12 percent only on the remaining $19,000. The result is an effective tax rate — the actual percentage of total income paid in taxes — that falls somewhere between those two numbers.

Key Takeaways

  • Income tax rates are set by the federal government and vary by state; they change each year based on inflation and congressional action.
  • The United States uses tax brackets, so you pay different rates on different portions of your income, not one flat rate on everything.
  • Your effective tax rate (the actual percentage you pay overall) is lower than your marginal rate (the rate on your last dollar earned).
  • Your employer withholds estimated taxes from each paycheck based on a W-4 form you fill out; the amount withheld may differ from what you actually owe.

Federal tax brackets and how they work

The federal government sets income tax brackets each year. For 2024, there are seven federal brackets ranging from 10 percent to 37 percent. The exact dollar amounts that define each bracket change annually to account for inflation. A single filer in 2024, for instance, pays 10 percent on income up to roughly $11,600, then 12 percent on income from $11,600 to $47,150, and so on up the scale.

Your filing status — single, married filing jointly, married filing separately, or head of household — determines which bracket thresholds explore to you. Married couples filing jointly have wider brackets than single filers, meaning they can earn more before moving into a higher rate. This is why two people earning the same total income may owe different amounts depending on whether they file together or separately.

The brackets are adjusted each year by the Internal Revenue Service (IRS) based on inflation. This adjustment, called bracket creep prevention, means the dollar amounts shift upward annually so that inflation alone does not push you into a higher tax bracket.

State and local income tax rates

In addition to federal income tax, most states charge their own income tax. State rates vary widely: some states have no income tax at all (including Texas, Florida, and Wyoming), while others charge rates ranging from roughly 1 percent to over 13 percent. A few states tax only certain types of income, such as dividends or capital gains, rather than wages.

Some cities and counties also impose local income taxes on top of state and federal rates. New York City, for example, charges residents an additional local tax. The total tax burden on your income can therefore include three separate rates — federal, state, and local — all applied to your earnings.

You can find your state's current income tax rate through your state's department of revenue or tax authority website. These rates also change periodically through state legislation, so checking your state's official source is more reliable than relying on older information.

Marginal rate versus effective rate

Your marginal tax rate is the percentage you pay on your last dollar of income — the rate of the bracket you are currently in. Your effective tax rate is the average percentage you pay on all your income combined. These two numbers are always different, and understanding the difference matters when you are making financial decisions.

Suppose you are single and earn $60,000 in 2024. Your marginal rate is 22 percent (the bracket your $60,000 falls into), but your effective rate is lower — roughly 9 percent — because you paid 10 percent on the first portion and 12 percent on the next portion before reaching the 22 percent bracket. When someone says "I am in the 22 percent bracket," they mean their marginal rate, not what they actually pay overall.

This distinction matters because a raise or bonus only gets taxed at your marginal rate, not your effective rate. If you earn an extra $1,000, you pay roughly 22 percent on that $1,000, not 9 percent. Conversely, if you are considering a deduction or a tax-advantaged move, it reduces your income at your marginal rate, not your effective rate.

How withholding connects to your tax rate

Your employer does not wait until tax time to collect federal income tax. Instead, they withhold an estimated amount from each paycheck based on the W-4 form you complete when you start the job. The W-4 asks about your filing status, number of dependents, and other income sources so your employer can estimate how much to hold back.

The amount withheld is not always exactly what you owe. If you withhold too much, you receive a refund when you file your return. If you withhold too little, you owe money. You can adjust your W-4 at any time during the year if your situation changes — for example, if you get married, have a child, or take on a second job.

Self-employed people do not have an employer to withhold taxes, so they must pay estimated taxes quarterly to the IRS. These quarterly payments are based on the income they expect to earn and the tax rate they expect to owe.

Deductions and credits that lower your tax rate

Your tax rate applies to your taxable income, not your total earnings. Deductions reduce the amount of income that is subject to tax. The standard deduction — a fixed amount that depends on your filing status — is the simplest way most people reduce taxable income. For 2024, the standard deduction is roughly $14,600 for single filers and $29,200 for married couples filing jointly.

Some people itemize deductions instead, listing specific expenses like mortgage interest, property taxes, or charitable donations. Itemizing makes sense only if your total deductions exceed the standard deduction. Either way, deductions lower your taxable income, which lowers the amount subject to your tax rate.

Tax credits work differently from deductions. A credit directly reduces the tax you owe, dollar for dollar. The Earned Income Tax Credit (EITC) and the Child Tax Credit are two common examples. A $1,000 credit saves you $1,000 in taxes, whereas a $1,000 deduction saves you roughly 22 percent of that amount (if you are in the 22 percent bracket).

Why tax rates change and how to stay informed

Federal tax brackets and rates are set by Congress and can change through new legislation. The most recent major overhaul was the Tax Cuts and Jobs Act of 2017, which adjusted rates and brackets. Some of those changes are scheduled to expire after 2025 unless Congress extends them. State legislatures also adjust their tax rates periodically, sometimes raising them to fund programs or lowering them for economic reasons.

Tax rates for the current year are published by the IRS on its website (irs.gov) and by each state's tax authority. The IRS also publishes tax tables and worksheets that show exactly how much tax is owed at each income level. Your employer should provide updated withholding tables each year so they can adjust what they hold from your paycheck.

If you are self-employed or have investment income, you may want to review the current rates and brackets before the year ends so you can plan estimated tax payments or adjust your business structure if needed. A tax professional or your state's tax authority can explain how rate changes affect your specific situation.

Frequently Asked Questions

Why do I pay different tax rates on different parts of my income?

The United States uses a progressive tax system where tax rates increase as income increases. This means the first portion of your income is taxed at a lower rate, and only income above certain thresholds is taxed at higher rates. This structure is designed so that people with higher incomes pay a larger share of taxes overall, but not at the highest rate on every dollar.

Is my effective tax rate the same as what comes out of my paycheck?

No. Your paycheck withholding is an estimate based on your W-4 form and may be higher or lower than your actual tax liability. Your effective tax rate is calculated when you file your tax return and accounts for all income, deductions, and credits for the entire year. If too much was withheld, you get a refund; if too little, you owe the difference.

Do all states have the same income tax rate?

No. Nine states have no income tax at all. The remaining states have rates ranging from about 1 percent to over 13 percent, and some states tax only certain types of income. You can find your state's current rate on your state's department of revenue website.

What happens to my tax rate if I get a raise?

Your raise is taxed at your marginal rate — the rate of the bracket it falls into — not your effective rate. If you earn an extra $5,000 and your marginal rate is 22 percent, you owe roughly $1,100 in federal income tax on that raise, though state and local taxes may explore as well.

Can I change how much tax is withheld from my paycheck?

Yes. You can fill out a new W-4 form at any time and submit it to your employer. Adjust your withholding if your income, filing status, or number of dependents changes, or if you find that you are consistently getting a large refund or owing money at tax time.