Federal income tax brackets work in layers: each slice of your taxable income is taxed at the rate for the bracket it falls into, and only the dollars above a threshold face the higher rate. So if you’re “in the 22% bracket,” you aren’t paying 22% on everything you earn. You’re paying 10% on the first layer, 12% on the next, and 22% only on the portion that reaches the 22% zone. That layering is why your effective tax rate is always lower than the top rate you touch.
What Actually Gets Taxed
The brackets don’t apply to your gross pay. They apply to your taxable income, which is what’s left after you subtract either the standard deduction or your itemized deductions, whichever is larger.1Office of the Law Revision Counsel. 26 USC 63 – Taxable Income Defined
For tax year 2026, the standard deduction is $16,100 for single filers or married filing separately, $32,200 for married filing jointly, and $24,150 for head of household.2Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026 Filers 65 or older add another $6,000 per person, or $12,000 on a joint return where both spouses qualify.3Internal Revenue Service. 2026 Filing Season Updates and Resources for Seniors
Itemizing beats the standard deduction only when your mortgage interest, charitable gifts, state and local taxes (capped at $10,000), and other qualifying costs together exceed the standard amount. At 2026 thresholds, most filers take the standard deduction.
How the Layers Work
The federal system runs seven rates: 10%, 12%, 22%, 24%, 32%, 35%, and 37%.4Internal Revenue Service. Federal Income Tax Rates and Brackets Your first dollars of taxable income fill the 10% layer. Once that layer is full, additional dollars start filling the 12% layer, and so on up the ladder.
Which thresholds define each layer depends on your filing status. Married filing jointly gets the widest brackets. Single is narrower. Head of household sits between the two. Married filing separately brackets are generally half the width of the joint brackets.5Office of the Law Revision Counsel. 26 USC 1 – Tax Imposed6Internal Revenue Service. Filing Status Your status is set by your household situation on December 31.
This layering answers the single biggest misconception in personal finance. A raise that pushes you into a higher bracket does not retax the income sitting below the new threshold. Only the dollars above the line pay the new rate. A raise always leaves you with more money than you had before. Always.
Marginal Rate vs. Effective Rate
Your marginal rate is the rate on your last dollar of taxable income. It’s the top bracket you’ve reached.
Your effective rate is your total federal income tax divided by your total taxable income. Because most of your income was taxed at lower rates in the layers below your top bracket, the effective rate is always lower than the marginal rate.
Take a single filer with $63,900 in taxable income and $8,770 in tax. The marginal rate is 22%, because the last dollars land in the 22% layer. The effective rate is about 13.7%, because most of the income was taxed at 10% or 12% on its way up. The gap between those two numbers is the progressive system doing what it’s designed to do.
This distinction matters when you’re weighing decisions. Contributing another dollar to a pre-tax retirement account saves you tax at your marginal rate, not your effective rate. So does a last-minute charitable deduction. But when someone asks what share of your income goes to federal tax, the honest answer is the effective rate.
2026 Federal Tax Brackets
The IRS adjusts bracket thresholds for inflation each year. The 2026 numbers are below.2Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026
Single Filers
- 10%: $0 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%: $0 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
The IRS publishes separate tables for head of household and married filing separately for the same tax year.
A Full Calculation From Start to Finish
Here’s how the bracket math plays out for a single filer with $80,000 in gross income for 2026.
First, subtract the standard deduction. $80,000 minus $16,100 leaves $63,900 in taxable income. Now walk it up the ladder, applying each rate only to the income that lands in that bracket:
- 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 $13,500 (from $50,401 to $63,900) = $2,970
Add the layers: $1,240 + $4,560 + $2,970 = $8,770 in federal income tax before credits.
The marginal rate is 22%. The effective rate on taxable income is about 13.7%. Measured against the full $80,000 in gross pay, the effective rate drops closer to 11%, because the standard deduction removed $16,100 from the calculation entirely.
Now imagine that filer gets a $5,000 raise. Only that new $5,000 sits in the 22% layer. The extra tax is $1,100, and $3,900 of the raise lands in the paycheck. Nothing already sitting below the 22% threshold moves.
How Credits Change the Final Number
Deductions lower your taxable income before the bracket math runs. Credits reduce the tax itself, dollar for dollar, after the brackets have done their work.7Internal Revenue Service. Tax Credits for Individuals: What They Mean and How They Can Help Refunds
A $1,000 deduction saves someone in the 22% bracket $220. A $1,000 credit saves any filer the full $1,000. That’s why credits are almost always worth more than deductions of the same size.
Credits fall into two categories. Nonrefundable credits can reduce your tax to zero but no further. Refundable credits can push your balance below zero and produce a cash refund even if you owed nothing to begin with.7Internal Revenue Service. Tax Credits for Individuals: What They Mean and How They Can Help Refunds The Child Tax Credit for 2026 is worth up to $2,200 per qualifying child, with up to $1,700 of it refundable, and phases out for single filers above $200,000 and joint filers above $400,000.8Internal Revenue Service. Child Tax Credit The Earned Income Tax Credit is fully refundable and tops out at $8,231 for families with three or more qualifying children.
Rates That Sit Outside the Regular Brackets
Not every federal tax runs through the seven-bracket ladder. A few categories use their own rules and get added on top.
Long-term capital gains — profits on investments held more than a year — use a separate schedule of 0%, 15%, or 20%. For 2026, single filers pay 0% on long-term gains up to $49,450 of taxable income, 15% up to $545,500, and 20% above that.9Internal Revenue Service. Rev. Proc. 2025-32 Short-term gains on assets held a year or less go through the regular brackets as ordinary income. Higher earners also owe a 3.8% net investment income tax once modified adjusted gross income exceeds $200,000 single or $250,000 joint, which pushes the top effective rate on long-term gains to 23.8%.10Internal Revenue Service. Topic No. 559, Net Investment Income Tax
Payroll taxes are separate from income tax. Wage earners pay 6.2% for Social Security on earnings up to $184,500 in 2026 and 1.45% for Medicare on all wages, with an added 0.9% Medicare tax on wages above $200,000 single or $250,000 joint.11Social Security Administration. Contribution and Benefit Base12Internal Revenue Service. Questions and Answers for the Additional Medicare Tax Self-employed filers pay both halves for a combined 15.3%, though they can deduct the employer-equivalent portion when calculating adjusted gross income.13Internal Revenue Service. Self-Employment Tax (Social Security and Medicare Taxes)
None of those numbers change how the income tax brackets themselves work. But they do explain why your total federal tax bill can look larger than a bracket calculation alone would suggest.