Your marginal tax rate is the federal income tax rate applied to your last dollar of taxable income. For 2026 it lands somewhere between 10% and 37%, depending on how much you earn and how you file. The rate matters because it tells you what happens at the edge of your income: how much of the next raise, bonus, or side-gig dollar you actually keep.
One thing it does not do is punish you for earning more. A common worry is that crossing into a higher bracket lowers your take-home pay. It doesn’t. Only the dollars above each threshold are taxed at the higher rate; everything below stays where it was.
How Progressive Brackets Work
Federal income tax uses a progressive structure, so you don’t pay one flat rate on everything you earn.1Office of the Law Revision Counsel. 26 USC 1 – Tax Imposed Your taxable income is divided into layers, and each layer is taxed at its own rate. The first slice of income is taxed at 10%, the next at 12%, then 22%, and so on up to 37%. Once one layer fills, only the overflow spills into the next.
Your marginal rate is simply the rate that applies to whatever layer your top dollar sits in. If your last taxable dollar falls in the 22% range, your marginal rate is 22%, even though most of your income was taxed at 10% and 12% along the way.
2026 Federal Income Tax Brackets
The IRS adjusts bracket thresholds every year for inflation, so the dollar ranges shift even when the rates don’t.2Internal Revenue Service. Inflation-Adjusted Tax Items by Tax Year The seven rates in place since 2018 were made permanent by legislation signed in 2025, so the 10%–37% structure continues.3Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026, Including Amendments From the One, Big, Beautiful Bill
Single Filers
- 10%: Taxable income up to $12,400
- 12%: $12,401 to $50,400
- 22%: $50,401 to $105,700
- 24%: $105,701 to $201,775
- 32%: $201,776 to $256,225
- 35%: $256,226 to $640,600
- 37%: Over $640,600
Married Filing Jointly
- 10%: Taxable income up to $24,800
- 12%: $24,801 to $100,800
- 22%: $100,801 to $211,400
- 24%: $211,401 to $403,550
- 32%: $403,551 to $512,450
- 35%: $512,451 to $768,700
- 37%: Over $768,700
Head of Household
- 10%: Taxable income up to $17,700
- 12%: $17,701 to $67,450
- 22%: $67,451 to $105,700
- 24%: $105,701 to $201,750
- 32%: $201,751 to $256,200
- 35%: $256,201 to $640,600
- 37%: Over $640,600
Married couples filing separately use the single-filer thresholds for most brackets, except the 35% bracket ends at $384,350 and the 37% rate starts above that amount.4IRS.gov. Revenue Procedure 2025-32 – 2026 Adjusted Items
Two things put you in a bracket: your filing status and your taxable income after deductions. Most people take the standard deduction rather than itemizing.5Internal Revenue Service. Deductions for Individuals – The Difference Between Standard and Itemized Deductions, and What They Mean For 2026, the standard deduction is $16,100 for single filers, $32,200 for joint filers, and $24,150 for heads of household.3Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026, Including Amendments From the One, Big, Beautiful Bill It acts like a 0% bracket at the bottom: a single filer earning $16,100 or less owes no federal income tax.
A Worked Example
Take a single filer with $85,000 in gross wages in 2026. Subtracting the $16,100 standard deduction leaves $68,900 in taxable income. The brackets apply layer by layer:
- 10% on the first $12,400 = $1,240
- 12% on the next $38,000 (from $12,401 to $50,400) = $4,560
- 22% on the remaining $18,500 (from $50,401 to $68,900) = $4,070
Total federal income tax: $9,870. The marginal rate is 22%, because that’s where the last dollar landed. The effective rate — total tax divided by taxable income — is about 14.3%. Most of the income was taxed well below the marginal rate, which is exactly what a progressive system is built to do.
Marginal Rate vs. Effective Rate
These two numbers answer different questions. The marginal rate tells you what happens at the edge: how much tax you’ll owe on the next raise, the next freelance invoice, or the next dollar of interest income. The effective rate tells you the average: what fraction of your total taxable income actually went to federal tax.
To find your effective rate, divide your total federal income tax by your total taxable income. Someone in the 24% bracket with $150,000 in taxable income pays far less than 24% overall, because the first $12,400 was taxed at 10%, the next chunk at 12%, and so on. That taxpayer’s effective rate lands around 17.5%. Use the effective rate to compare years or to check whether withholding changes moved the needle. Use the marginal rate for decisions about the next dollar.
Using Your Marginal Rate for Financial Decisions
Your marginal rate is the most useful number in tax planning, because it tells you the exact impact of any move that changes your taxable income.
Retirement Contributions
Every dollar you put into a traditional 401(k) or traditional IRA lowers your taxable income by that same dollar. If your marginal rate is 22%, a $1,000 contribution saves $220 in federal tax now. For 2026, you can defer up to $24,500 into a 401(k), with an $8,000 catch-up if you’re 50 or older and $11,250 if you’re between 60 and 63. The IRA limit is $7,500.6Internal Revenue Service. 401(k) Limit Increases to $24,500 for 2026, IRA Limit Increases to $7,500
Roth contributions run the other direction: you pay tax now at your current marginal rate and owe nothing at withdrawal. If you expect a higher rate in retirement, Roth locks in today’s lower rate. If you expect a lower rate later, traditional gives you a bigger lifetime benefit.
Bonuses and Supplemental Wages
When you get a bonus, your employer withholds federal tax at a flat 22% no matter your actual bracket. If your marginal rate is 12%, you’ll get the difference back at filing. If it’s 32%, you’ll owe. Supplemental wages above $1 million in a calendar year are withheld at 37%.7Internal Revenue Service. Publication 15 (2026), (Circular E), Employer’s Tax Guide Withholding is a prepayment estimate, not your real tax rate.
Credits vs. Deductions
Your marginal rate sets the value of a deduction but has no effect on the value of a credit. A $1,000 deduction saves $220 for someone in the 22% bracket and $120 for someone in the 12% bracket. A $1,000 credit saves $1,000 for everyone, because it reduces tax owed dollar for dollar.8Internal Revenue Service. Credits and Deductions for Individuals That’s why a credit almost always beats a deduction of the same face value.
Where Your Marginal Rate Doesn’t Apply
The bracket table covers ordinary federal income tax. Several other things you pay run on separate schedules.
Long-term capital gains and qualified dividends have their own rates of 0%, 15%, or 20%. For 2026, a single filer pays 0% on long-term gains up to $49,450 in taxable income, 15% up to $545,500, and 20% above that. Joint filers hit the 15% rate above $98,900 and the 20% rate above $613,700.4IRS.gov. Revenue Procedure 2025-32 – 2026 Adjusted Items Short-term gains, from investments held a year or less, don’t get this treatment; they stack on top of your wages and get taxed at your ordinary marginal rate.
High earners also owe a 3.8% net investment income tax on investment income once modified adjusted gross income clears $200,000 for single filers or $250,000 for joint filers.9Internal Revenue Service. Topic No. 559, Net Investment Income Tax Those thresholds aren’t indexed for inflation.
Payroll taxes are separate too. For 2026, Social Security tax is 6.2% on wages up to $184,500, and Medicare tax is 1.45% on all wages with no cap. Earned income above $200,000 for single filers or $250,000 for joint filers triggers an additional 0.9% Medicare surtax.10Social Security Administration. 2026 Cost-of-Living Adjustment (COLA) Fact Sheet Someone in the 22% federal income tax bracket with wages below the Social Security cap faces a combined marginal rate of roughly 29.65% on the next dollar, before any state income tax.
Finally, the alternative minimum tax runs a parallel calculation that adds back certain deductions and applies its own rates of 26% and 28%. For 2026, the AMT exemption is $90,100 for single filers and $140,200 for joint filers.4IRS.gov. Revenue Procedure 2025-32 – 2026 Adjusted Items Most taxpayers never owe it. It mainly reaches people with large state and local tax deductions or significant incentive stock option exercises.