Your marginal tax rate is the percentage you pay on your last dollar of income

Your marginal tax rate is the tax rate applied to your highest bracket of income — the money you earned last, not an average across all your earnings. If you earn $50,000 and the next dollar you earn is taxed at 22%, your marginal rate is 22%. This matters because it tells you what you actually owe on additional income, bonuses, or side work.

The U.S. uses a progressive tax system with seven federal brackets for 2024. Each bracket applies only to income within that range, not to all your income. Most people confuse their marginal rate with their effective rate (the average tax on all income), which is always lower. Finding your marginal rate takes three steps: know your filing status, find your total taxable income, and match it to the current year's tax bracket table.

Key Takeaways

  • Your marginal tax rate is the percentage applied to your last dollar of income, not an average of what you pay on all income.
  • The IRS publishes new tax bracket tables every year, and they differ by filing status (single, married filing jointly, head of household, married filing separately).
  • You find your marginal rate by locating your total taxable income on the bracket table that matches your filing status.
  • Your effective tax rate (total tax divided by total income) is always lower than your marginal rate because lower brackets apply to earlier income.

Step 1: Determine your filing status

Tax brackets change based on whether you file as single, married filing jointly, married filing separately, or head of household. Your filing status is determined by your marital status on December 31 of the tax year and whether you have dependents. This is the first thing you need because the same income amount falls into different brackets depending on your status.

For example, $100,000 in taxable income puts a single filer in the 22% bracket but a married filing jointly filer in the 12% bracket for 2024. If you are unsure of your status, the IRS publication 17 walks through each category, but most people use the status that results in the lowest tax.

Step 2: Calculate your taxable income

Taxable income is not the same as gross income. Start with your total income from all sources (wages, self-employment, investment gains, etc.), then subtract the standard deduction or itemized deductions, and subtract any above-the-line deductions like student loan interest or IRA contributions. The result is your taxable income — the number you use to find your bracket.

Your tax return (Form 1040) shows this calculation. If you have already filed, line 15 shows your taxable income. If you have not filed yet, you can estimate it by adding up your income sources and subtracting your deduction. The standard deduction for 2024 is $14,600 for single filers and $29,200 for married filing jointly, though these amounts change yearly.

Step 3: Match your income to the current tax bracket table

The IRS publishes tax bracket tables every year, usually in late 2023 for the following year. These tables show income ranges and the corresponding tax rate. Find the table for your filing status and locate the row where your taxable income falls. The rate listed for that row is your marginal rate.

For 2024, the federal brackets for single filers are: 10% up to $11,600; 12% from $11,601 to $47,150; 22% from $47,151 to $100,525; 24% from $100,526 to $191,950; 32% from $191,951 to $243,725; 35% from $243,726 to $609,350; and 37% above $609,350. If your taxable income is $75,000, you fall in the 22% bracket, so your marginal rate is 22%. The IRS website publishes these tables for all filing statuses and updates them annually.

Why marginal rate matters more than effective rate

Your marginal rate tells you what you will actually owe on new income. If you receive a $5,000 bonus and your marginal rate is 22%, you owe roughly $1,100 in federal tax on that bonus (before state tax and other deductions). Your effective rate — total tax paid divided by total income — is lower because your earlier income was taxed at lower rates.

People often ask about marginal rate when deciding whether to take a second job, claim a deduction, or make a large sale. The answer depends on your marginal rate, not your effective rate. If you are in the 24% bracket, a $1,000 deduction saves you $240 in federal tax. If you are in the 12% bracket, it saves you $120. Your marginal rate is the one that changes your tax bill.

State and local tax brackets work the same way

Most states have their own progressive tax brackets, and some cities do as well. Each state publishes its own bracket table, usually on the state revenue or tax department website. Your total marginal rate is your federal rate plus your state rate plus any local rate. If you are in the 22% federal bracket and the 5% state bracket, your combined marginal rate is 27%.

State brackets often have different income ranges and different numbers of brackets than federal brackets. Some states have a flat tax (one rate for all income), and some have no income tax at all. Check your state's tax website to find the current brackets and your state marginal rate.

Frequently Asked Questions

Is my marginal rate the same as what I see on my pay stub?

No. Your pay stub shows federal withholding, which is an estimate based on your W-4 form. Your actual marginal rate is determined by your total taxable income for the year. Withholding is usually close but not exact, which is why you may owe or receive a refund when you file.

What if my income changes during the year?

Your marginal rate is based on your total taxable income for the full year, not your income at any one point. If you earn $40,000 in the first half and $60,000 in the second half, your marginal rate is based on $100,000 total income, not on either half separately. This is why a large bonus or inheritance late in the year can push you into a higher bracket.

Do capital gains use a different marginal rate?

Long-term capital gains (assets held over one year) use separate brackets, which are lower than ordinary income brackets. Short-term capital gains are taxed as ordinary income at your regular marginal rate. The IRS publishes separate capital gains bracket tables, so you may have one marginal rate for wages and a different one for long-term gains.

Where do I find the tax bracket table for my state?

Search "[your state] tax brackets 2024" or visit your state's department of revenue website. Most states publish their brackets in the same format as the IRS — a table showing income ranges and rates by filing status. Some states update brackets annually for inflation, so check the current year's table, not last year's.

Can my marginal rate go down if I earn more money?

No. The tax system is progressive, so earning more income moves you into higher brackets, never lower ones. Your marginal rate can only stay the same or increase as income increases. However, certain deductions or credits can reduce your taxable income, which could lower your marginal bracket.