Estimated Federal Tax
Taxable Income
Effective Tax Rate
After-Tax Income
Table of Contents
Federal income tax, bracket by bracket
The US tax system is progressive — each rate applies only to the income within that bracket, never to the whole income. This calculator walks your income through the 2025 or 2026 brackets and shows the marginal rate, the effective rate, and exactly how much tax each bracket contributes.
How federal income tax is calculated
Four steps:
Federal Tax = Sum over brackets of (Income in bracket × Bracket rate)
- Gross income — wages, salary, business income, taxable interest, dividends, etc.
- Subtract the standard deduction (or itemized, whichever is larger) → taxable income.
- Apply progressive brackets to taxable income — not to gross.
- Subtract tax credits (Child Tax Credit, EITC, etc.) to get final tax owed.
Worked example using the calculator's defaults ($75,000 gross, single filer, 2025):
- Gross income: $75,000
- Standard deduction (single, 2025): −$15,000
- Taxable income: $60,000
- 10% on first $11,925 = $1,192.50
- 12% on $11,925–$48,475 ($36,550) = $4,386.00
- 22% on $48,475–$60,000 ($11,525) = $2,535.50
- Total federal tax: $8,114.00
- Marginal rate: 22% · Effective rate: $8,114 ÷ $75,000 = 10.8%
- After-tax income (federal only): $66,886
2025 federal income tax brackets
| Rate | Single | Married filing jointly | Head of household |
|---|---|---|---|
| 10% | $0–$11,925 | $0–$23,850 | $0–$17,000 |
| 12% | $11,925–$48,475 | $23,850–$96,950 | $17,000–$64,850 |
| 22% | $48,475–$103,350 | $96,950–$206,700 | $64,850–$103,350 |
| 24% | $103,350–$197,300 | $206,700–$394,600 | $103,350–$197,300 |
| 32% | $197,300–$250,525 | $394,600–$501,050 | $197,300–$250,500 |
| 35% | $250,525–$626,350 | $501,050–$751,600 | $250,500–$626,350 |
| 37% | $626,350+ | $751,600+ | $626,350+ |
2025 standard deduction: $15,000 single, $30,000 married filing jointly, $22,500 head of household. Brackets and standard deduction adjust annually for inflation — verify the current year's figures at irs.gov.
Marginal rate vs effective rate
Two different rates — both matter, for different decisions:
| Gross (single, 2025) | Taxable income | Federal tax | Marginal | Effective |
|---|---|---|---|---|
| $40,000 | $25,000 | $2,762 | 12% | 6.9% |
| $60,000 | $45,000 | $5,158 | 12% | 8.6% |
| $75,000 | $60,000 | $8,114 | 22% | 10.8% |
| $100,000 | $85,000 | $13,614 | 22% | 13.6% |
| $150,000 | $135,000 | $25,541 | 24% | 17.0% |
| $250,000 | $235,000 | $53,055 | 32% | 21.2% |
| $500,000 | $485,000 | $137,302 | 35% | 27.5% |
Use marginal rate for decisions about additional income: "if I take this bonus, how much will I keep?" The answer is (1 − marginal rate).
Use effective rate for budget planning and year-over-year comparisons: "what fraction of my total income went to federal tax?"
Legal ways to reduce federal income tax
Three categories, in order of leverage:
1. Reduce taxable income (above-the-line and pre-tax)
- Traditional 401(k): up to $23,500 in 2025 ($31,000 if 50+). Reduces taxable wages dollar-for-dollar.
- Traditional IRA: up to $7,000 ($8,000 if 50+); deduction phases out at higher income if covered by workplace plan.
- HSA: up to $4,300 single / $8,550 family in 2025. Triple-tax-advantaged.
- Self-employed retirement: SEP-IRA, Solo 401(k) up to ~25% of net SE income.
2. Itemize (instead of standard deduction) if you have large eligible expenses
- State and local taxes (SALT): capped at $10,000 combined
- Home mortgage interest: on up to $750,000 of acquisition debt
- Charitable contributions: typically up to 60% of AGI for cash to qualified orgs
- Medical expenses: amount exceeding 7.5% of AGI
3. Claim tax credits (these reduce tax owed dollar-for-dollar, not just taxable income)
- Child Tax Credit: $2,000 per qualifying child under 17 (phases out at $200K single / $400K MFJ)
- Earned Income Tax Credit: up to ~$8,000 for low-to-moderate income families
- American Opportunity Credit: up to $2,500/year per student for first four years of college
- Saver's Credit: up to $1,000/$2,000 for retirement contributions at lower income
Filing status matters — sometimes a lot
Filing status determines bracket widths and standard deduction. The choice isn't optional — it depends on your marital and household situation as of December 31:
- Single: unmarried, divorced, or legally separated by year-end.
- Married filing jointly (MFJ): typically the lowest combined tax for married couples; brackets are roughly double the single brackets at lower income.
- Married filing separately (MFS): rare; useful in specific cases (income-driven student loans, suspected fraud, large medical deductions). Usually higher combined tax than MFJ.
- Head of household (HoH): unmarried + maintaining home for a qualifying dependent more than half the year. Wider brackets than single and higher standard deduction.
- Qualifying surviving spouse: available for 2 years after spouse's death if maintaining a household with a dependent child.
Limitations of this calculator
- Federal income tax only. No FICA (use Take Home Pay Calculator for the complete picture), no state tax, no local tax.
- Standard deduction assumed. Itemized deductions, above-the-line adjustments, and pre-tax retirement contributions aren't modeled.
- No tax credits applied. Child Tax Credit, EITC, education credits, etc. would reduce the final tax shown.
- Capital gains taxed separately. Long-term capital gains and qualified dividends use 0/15/20% rates, not ordinary brackets.
- AMT, NIIT, Additional Medicare not modeled. Relevant for high earners and large investment income.
- 2026 brackets approximate. Inflation-indexed; verify against IRS.gov for the official figures.
- Self-employment adds 15.3% SE tax (with half deductible) on top of income tax — not shown here.
Sources & references
- IRS — Federal Income Tax Rates and Brackets — authoritative current and historical bracket schedules.
- IRS Publication 17 — Your Federal Income Tax — comprehensive guide for individual filers.
- IRS — Credits and Deductions for Individuals — full list of credits, eligibility, and amounts.
- Tax Foundation — Historical Federal Income Tax Brackets — bracket history and context.
FAQs
No — that's the most common tax misconception. Only the income that falls within the 22% bracket is taxed at 22%. A single filer earning $75,000 in 2025 pays: 10% on the first $11,925, 12% on $11,925–$48,475, and 22% only on the portion from $48,475–$60,000 (after the $15,000 standard deduction reduces taxable income to $60,000). Total federal tax: about $8,094 — an effective rate of 10.8%, not 22%.
Marginal rate = the rate on your next dollar of taxable income (the bracket you're currently in). Effective rate = total tax owed ÷ total gross income. Effective rate is always lower than marginal because earlier dollars are taxed at lower bracket rates and the standard deduction removes the bottom slice entirely. For a single $100,000 earner in 2025, marginal rate is 22%, but effective rate is roughly 13.4%.
Take whichever is larger. The 2025 standard deduction is $15,000 single / $30,000 MFJ / $22,500 head of household. Itemize if your eligible deductions exceed those amounts: SALT capped at $10,000 (state income tax + property tax combined), mortgage interest on up to $750K of acquisition debt, charitable donations (cash to qualified orgs typically up to 60% of AGI), medical expenses exceeding 7.5% of AGI. After the 2017 TCJA roughly doubled the standard deduction, ~90% of taxpayers now take it.
Federal income tax only. Not included: FICA payroll taxes (Social Security 6.2% + Medicare 1.45%, see Take Home Pay Calculator), state and local income tax (varies 0–13.3%), self-employment tax (15.3%), capital gains tax (0/15/20% long-term), Net Investment Income Tax (3.8% over $200K/$250K), Additional Medicare (0.9% over $200K/$250K), AMT, tax credits (Child Tax Credit, EITC, etc.), itemized deductions beyond standard.
Federal brackets and standard deduction adjust annually for inflation, announced by the IRS in late October/early November for the following calendar year. The brackets that apply to a given year's income are the brackets for that year — e.g., income earned in 2025 uses 2025 brackets, regardless of when you file. The IRS publishes finalized brackets at irs.gov. Major bracket structure changes require congressional action (the 2017 TCJA is the most recent example; portions are scheduled to sunset after 2025 absent further legislation).