How is federal income tax calculated?

Federal income tax uses a progressive bracket system. Your taxable income (gross income minus deductions) is split into brackets, and each bracket is taxed at its own rate. For 2026, single filers face brackets of 10%, 15%, 25%, 28%, 33%, 35%, and 39.6%. Only the portion of income within each bracket is taxed at that rate, so your effective rate is always lower than your marginal (top) rate.

What is the difference between marginal and effective tax rate?

Your marginal rate is the rate applied to your last dollar of taxable income — the top bracket you fall into. Your effective rate is your total tax divided by your gross income, representing your true average tax burden. Because lower brackets are taxed less and deductions shield income, your effective rate is always lower than your marginal rate. Use the effective rate to understand your overall burden and the marginal rate to evaluate deductions and extra income.

Should I take the standard deduction or itemize?

Take whichever is larger. The 2026 standard deduction is $8,350 for single filers and $16,700 for married filing jointly. Itemize only if your deductible expenses (mortgage interest, state/local taxes up to $10,000, charitable contributions, medical expenses above 7.5% of AGI) exceed the standard deduction. Most taxpayers now take the standard deduction because it's higher and requires no record-keeping.

What are the 2026 federal income tax brackets?

For 2026, the TCJA provisions are scheduled to sunset, reverting to a 7-bracket structure. Single filers: 10% up to $12,100; 15% to $48,550; 25% to $117,250; 28% to $224,500; 33% to $515,800; 35% to $618,700; 39.6% above. Married filing jointly brackets are roughly double. These are projections — update with official IRS figures when published.

How can I lower my taxable income?

Contribute to tax-advantaged accounts: 401(k) (up to $23,000 in 2026), traditional IRA (up to $8,000 if 50+), and HSA (up to $4,400 self / $8,300 family). These reduce taxable income dollar-for-dollar at your marginal rate. Other strategies: charitable giving, tax-loss harvesting, and bunching deductions to exceed the standard deduction in alternate years. Each dollar deferred at a 25% marginal rate saves $0.25 in tax.

Does this calculator include state taxes or FICA?

No. This calculator estimates federal income tax only, using 2026 projected brackets and the standard deduction. It does not include state income taxes, FICA (Social Security 6.2% + Medicare 1.45%), self-employment tax, or capital gains tax. For self-employment tax, use our self-employment tax calculator. Your actual total tax burden will be higher than the federal income tax estimate shown here.

What filing status should I choose?

Single applies to unmarried filers. Married Filing Jointly combines both spouses' income on one return and uses roughly double the bracket thresholds and standard deduction — usually resulting in lower tax for couples. Married Filing Separately is rarely beneficial. Head of Household (not modeled here) offers in-between brackets for unmarried taxpayers supporting a dependent. Choose the status that matches how you'll actually file.

Are the 2026 tax brackets final?

No. The 2026 brackets shown here are projections based on the scheduled TCJA sunset, which reverts rates to 10/15/25/28/33/35/39.6% and adjusts standard deductions for inflation. Congress could extend or modify these provisions before 2026. Always confirm with official IRS publications and a qualified tax professional before making final tax decisions.

How do I calculate my federal income tax bracket?

Federal income tax uses progressive brackets — you don't pay a single rate on all income. To calculate: (1) Subtract your standard or itemized deduction from your gross income to get taxable income. (2) Find which bracket your taxable income falls into for your filing status. (3) Apply each bracket's rate only to the portion of income within that bracket. For example, in 2026 a single filer with $75,000 taxable income pays 10% on the first $11,925, 15% on income from $11,926 to $48,375, and 25% on income from $48,376 to $75,000. Your marginal rate is the rate on your last dollar earned; your effective rate is your total tax divided by total income.

Income Tax Calculator

An income tax calculator is a free online tool that estimates your 2026 federal income tax using progressive brackets and the standard deduction. It shows your taxable income, effective rate, marginal rate, and after-tax income with a bracket-by-bracket breakdown. Free, no sign-up required.

Income & Deductions

Gross Income?Total income before any deductions.

Itemized Deductions

Filing Status

End of inputs

Your 2026 Federal Tax Estimate

Taxable Income

$80,400.00

After $14,600.00 deduction

Federal Tax

$14,640.00

2026 brackets

Effective Rate

15.41%

Tax ÷ gross income

Marginal Rate

25.00%

Top bracket

After-Tax Income

$80,360.00

Gross minus tax

Deductions Used

$14,600.00

Std: $8,350.00

Gross income: $95,000.00. Filing status: Single. Deductions used: $14,600.00. Taxable income: $80,400.00. Federal tax: $14,640.00 (15.41% effective, 25.00% marginal). After-tax income: $80,360.00.

Federal Tax by Bracket

Key Insights

You're itemizing because your $14,600.00 in itemized deductions exceeds the $8,350.00 standard deduction — saving you an extra $6,250.00 in deductible income. Keep records of mortgage interest, state/local taxes (up to $10k), and charitable contributions.

Your effective tax rate is 15.41% — a moderate federal burden on your $95,000.00 income. Because the U.S. uses progressive brackets, your effective rate is well below your marginal rate of 25.00%. Most taxpayers fall in this range.

Your marginal rate is 25.00% — a mid-range bracket. Your last dollar of taxable income ($80,400.00) falls here, though your effective rate of 15.41% is lower because lower brackets are taxed less.

Your $95,000.00 income is in a common middle range. Deductions and progressive brackets keep your federal tax at $14,640.00. Even small increases in pre-tax savings can lower your marginal rate impact.

You keep 84.59% of your gross income — $80,360.00 after $14,640.00 in federal tax. This is a typical retention rate for middle-to-upper income earners.

Guide

How to Use This Calculator

1Enter your gross annual income — this is your total income before any taxes or deductions.
2Set your itemized deductions. If your itemized deductions are below the standard deduction, the calculator automatically uses the larger standard deduction.
3Choose your filing status (Single or Married Filing Jointly) — this determines your bracket thresholds and standard deduction.
4Review your taxable income, which is gross income minus the deductions used.
5Check your federal tax estimate, effective rate, and marginal rate in the result panel.
6Examine the tax-by-bracket bar chart to see how much of your tax falls in each bracket.
7Use the AI insights to understand your effective vs marginal rate and deduction strategy.
8Adjust your income or deductions to model scenarios — see how pre-tax contributions could lower your tax.

Formula

How It's Calculated

Federal income tax (progressive brackets):

taxableIncome = max(0, grossIncome − max(standardDeduction, itemizedDeductions))

tax = Σ for each bracket b:
        (min(taxableIncome, b.max) − b.min) × b.rate
      (only for brackets where taxableIncome > b.min)

effectiveRate = tax / grossIncome
marginalRate  = rate of the highest bracket where taxableIncome ≥ b.min
afterTaxIncome = grossIncome − tax

2026 single brackets (projected, post-TCJA sunset):
  10%   $0 – $12,100
  15%   $12,100 – $48,550
  25%   $48,550 – $117,250
  28%   $117,250 – $224,500
  33%   $224,500 – $515,800
  35%   $515,800 – $618,700
  39.6% $618,700+

Standard deduction 2026: $8,350 (single), $16,700 (married jointly).

Example: $95,000 gross income, single, $14,600 itemized deductions.
  deductionsUsed = max($8,350, $14,600) = $14,600
  taxableIncome  = $95,000 − $14,600 = $80,400
  tax = 10%×$12,100 + 15%×$36,450 + 25%×$31,850 = $14,640
  effectiveRate  = $14,640 / $95,000 ≈ 15.41%
  marginalRate   = 25%
  afterTaxIncome = $95,000 − $14,640 = $80,360

Glossary

Key Terms

FAQ

Frequently Asked Questions

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