To calculate progressive tax under the federal system, work out your taxable income, then apply each bracket’s rate only to the portion of income that falls inside that bracket, and add the pieces together. Your entire income is never taxed at one rate. The first slice is taxed at 10 percent, the next slice at 12 percent, and so on through seven brackets that top out at 37 percent for 2026.1Office of the Law Revision Counsel. 26 U.S.C. 1 – Tax Imposed
Get to Your Taxable Income First
The bracket schedule applies to taxable income, not to your salary or your total earnings. Getting to that number takes three steps.
Add Up Gross Income
Gross income covers almost everything you received during the year: wages, freelance payments, business profits, interest, rental income, and investment gains, among other things.2Office of the Law Revision Counsel. 26 U.S.C. 61 – Gross Income Defined If money came in and no specific exclusion applies, the IRS counts it.
Subtract Above-the-Line Adjustments
Certain deductions come off gross income before you make any deduction choice. Reported on Schedule 1 of Form 1040, these include traditional IRA contributions, the deductible portion of self-employment tax, student loan interest, and health savings account contributions.3IRS.gov. Schedule 1 (Form 1040) Additional Income and Adjustments to Income The result is your adjusted gross income, or AGI.
Subtract the Standard Deduction or Itemize
From AGI, subtract either the standard deduction or your total itemized deductions, whichever is larger.4Office of the Law Revision Counsel. 26 U.S.C. 63 – Taxable Income Defined For 2026 the standard deduction is $16,100 for single filers and married filing separately, $32,200 for married filing jointly and surviving spouses, and $24,150 for head of household.5Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026, Including Amendments From the One, Big, Beautiful Bill Itemize only if your deductible expenses, such as mortgage interest, charitable gifts, and state and local taxes, add up to more than that standard amount. What’s left is your taxable income, and it’s the only figure the bracket schedule cares about.
The 2026 Federal Tax Brackets
The IRS publishes rate schedules each year, adjusted for inflation, under 26 U.S.C. ยง 1. Your filing status determines which schedule you use, because the thresholds shift significantly between filers.6Internal Revenue Service. Filing Status
Single filers, 2026:
- 10% on $0 to $12,400
- 12% on $12,401 to $50,400
- 22% on $50,401 to $105,700
- 24% on $105,701 to $201,775
- 32% on $201,776 to $256,225
- 35% on $256,226 to $640,600
- 37% on income over $640,600
Married filing jointly, 2026:
- 10% on $0 to $24,800
- 12% on $24,801 to $100,800
- 22% on $100,801 to $211,400
- 24% on $211,401 to $403,550
- 32% on $403,551 to $512,450
- 35% on $512,451 to $768,700
- 37% on income over $768,700
Head of household and married filing separately use their own thresholds published in the same IRS announcement.5Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026, Including Amendments From the One, Big, Beautiful Bill Head of household thresholds sit between the single and joint schedules.
Working the Layered Math
Picture the brackets as stacked containers that fill from the bottom up. Your first dollars of taxable income pour into the 10 percent container. When it fills, the next dollars spill into the 12 percent container, and so on. Only the income sitting inside a given container is taxed at that container’s rate.
Take a single filer with $75,000 in taxable income for 2026. The math runs like this:
- The first $12,400 taxed at 10% produces $1,240.
- The next $38,000, from $12,401 to $50,400, taxed at 12% produces $4,560.
- The remaining $24,600, from $50,401 to $75,000, taxed at 22% produces $5,412.
Add the three amounts and the total federal income tax comes to $11,212. The 22 percent rate only touches the $24,600 sitting in that bracket, not the full $75,000. That’s why a raise pushing you into a higher bracket never costs you more in tax than the raise itself is worth.
The same procedure works at any income and any filing status. Find the bracket your last dollar lands in, fill each lower bracket completely, and multiply each slice by its own rate.
Marginal Rate vs. Effective Rate
Two numbers describe the result, and mixing them up is a common mistake.
Your marginal tax rate is the rate on your last dollar of taxable income. For the single filer earning $75,000, that rate is 22 percent, because the final dollars land in the 22 percent bracket.7Internal Revenue Service. Federal Income Tax Rates and Brackets This is the rate that matters when you’re deciding whether an additional deduction or retirement contribution is worth pursuing, because each dollar you shield saves you 22 cents.
Your effective tax rate is the actual share of taxable income going to federal tax. Divide $11,212 by $75,000 and you get roughly 14.9 percent. That weighted average sits well below 22 percent, because most of the income was taxed at 10 and 12 percent. When someone says they’re “in the 22 percent bracket,” they’re quoting the marginal rate, not the share of income they actually pay.
Credits Come Off After the Bracket Math
The bracket calculation produces a tax liability, but liability is not always the final bill. Tax credits subtract from the liability dollar for dollar after the bracket work is done. A $1,000 credit saves $1,000 regardless of your bracket, which makes credits more powerful than deductions of the same size.
A nonrefundable credit can drive tax to zero but no further; anything left over disappears. A refundable credit pays out the excess as a refund. The Child Tax Credit for 2026 is worth up to $2,200 per qualifying child under 17, with up to $1,700 of that refundable. The Earned Income Tax Credit, aimed at lower- and moderate-income workers, is fully refundable and can exceed $8,000 for families with three or more children.
Credits phase out as income rises. The Child Tax Credit shrinks by $50 for every $1,000 of income above $200,000 for single filers and $400,000 for married couples filing jointly.
When Investment Income Changes the Calculation
Long-term capital gains and qualified dividends run on their own progressive schedule, separate from ordinary income brackets. The rates are lower, but the layered structure is the same.
For 2026, single filers pay 0 percent on long-term gains if total taxable income is $49,450 or less, 15 percent between $49,451 and $545,500, and 20 percent above $545,500. Married couples filing jointly get wider brackets: the 0 percent rate reaches $98,900 and the 15 percent rate extends to $613,700.8Kiplinger. IRS Updates Capital Gains Tax Thresholds for 2026: Here’s What’s New Because gains stack on top of ordinary income, someone with a modest salary can still owe 15 or 20 percent on investment profits even if wages alone would sit in the 0 percent zone. Short-term gains on assets held one year or less don’t qualify for these rates and are taxed as ordinary income through the regular schedule.
A separate 3.8 percent Net Investment Income Tax applies on top of everything else when modified adjusted gross income passes $200,000 for single filers or $250,000 for married couples filing jointly. It hits the lesser of your net investment income or the amount by which MAGI exceeds the threshold, and the thresholds are not adjusted for inflation.9Internal Revenue Service. Topic No. 559, Net Investment Income Tax
One Boundary Worth Knowing
The bracket calculation above is the regular federal income tax. A parallel system called the Alternative Minimum Tax disallows certain deductions and applies its own rates; you calculate under both and pay whichever is higher. For 2026, the AMT exemption is $90,100 for single filers and $140,200 for married couples filing jointly, with phase-outs beginning at $500,000 and $1,000,000 respectively.5Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026, Including Amendments From the One, Big, Beautiful Bill Most taxpayers with straightforward wage income and the standard deduction never trigger it, but it can surface for people exercising incentive stock options or claiming large state and local tax deductions. If either applies to you, the regular bracket math is not the whole answer.