Federal Income Tax Calculator
Estimate your federal income tax, effective and marginal rates.
- Author
- CentCompass
- Last Updated
- Reading Time
- 4 min read
Total federal tax
$7,670.00
Effective rate
10.23%
Marginal rate
22.00%
After-tax income
$67,330.00
Based on tax year 2026 federal rules, standard deduction of $16,100.00. Does not include state taxes.
| Rate | Taxable in bracket | Tax |
|---|---|---|
| 10% | $12,400.00 | $1,240.00 |
| 12% | $38,000.00 | $4,560.00 |
| 22% | $8,500.00 | $1,870.00 |
What is the Federal Income Tax Calculator?
A federal income tax calculator estimates your U.S. federal income tax, effective tax rate, and marginal bracket for the 2026 tax year. It applies the progressive rate schedule published by the IRS, so you can see not only what you owe but how that total is assembled bracket by bracket — which is where most misunderstandings about tax rates begin.
How the calculation works
Your income minus the standard deduction gives taxable income. The progressive brackets are then applied in layers: the first slice of taxable income is taxed at the lowest rate, the next slice at the next rate, and so on. Only the income that falls inside a given bracket is taxed at that bracket's rate. Your marginal rate is the rate on your last dollar, while your effective rate is total tax divided by total income — always the lower of the two, and usually by a wide margin.
The formula
Taxable income = gross income − standard deduction. For 2026 the standard deduction is $16,100 for single filers, $32,200 for married couples filing jointly, $16,100 filing separately, and $24,150 for heads of household. Tax is then the sum across brackets of (income within that bracket × that bracket's rate). Effective rate = total tax ÷ gross income. Marginal rate = the rate of the highest bracket your taxable income reaches.
Worked example
A single filer earning $75,000 takes the $16,100 standard deduction, leaving $58,900 of taxable income. The first $12,400 is taxed at 10%, giving $1,240. The next layer up to $50,400 is taxed at 12%, adding $4,560. The remainder above that is taxed at 22%. Total federal tax comes to roughly $7,670 — an effective rate near 10.2%, even though the filer sits in the 22% marginal bracket. Being "in the 22% bracket" clearly does not mean paying 22% of your income.
Tips
- Your marginal rate applies only to income inside the top bracket, never to the whole amount.
- Pre-tax contributions to a 401(k) or HSA reduce taxable income dollar for dollar.
- Compare the standard deduction against your itemizable expenses before assuming either.
- A raise that pushes you into a higher bracket never reduces your take-home pay.
- Credits reduce tax owed directly and are worth more per dollar than deductions.
Common mistakes
- Believing the marginal rate applies to every dollar earned.
- Confusing a deduction, which lowers taxable income, with a credit, which lowers tax owed.
- Treating a large refund as a win rather than as a year of interest-free lending to the government.
- Assuming this federal figure is the whole bill and forgetting state tax and FICA.
- Itemizing out of habit when the standard deduction is now larger for most filers.
Limitations
This tool covers federal income tax for 2026 using the standard deduction only. It excludes state and local income taxes, FICA payroll taxes, itemized deductions, tax credits such as the Child Tax Credit or Earned Income Tax Credit, the Alternative Minimum Tax, self-employment tax, and the special treatment of capital gains and qualified dividends. Anyone with income beyond ordinary wages should treat this as a starting point rather than a filing figure.
Frequently asked questions
Which bracket does this calculator put me in?
Your marginal bracket is the rate applied to your final dollar of taxable income, which this tool reports from your inputs. Note that it describes the last dollar only — the income beneath it is taxed at every lower rate along the way.
Effective vs marginal rate?
The marginal rate is the rate on your next dollar of income and drives decisions about extra earnings or deductions. The effective rate is total tax divided by total income, and it is the figure that actually describes your overall tax burden.
Does this include state taxes?
No. This estimates federal income tax only. State rules vary enormously — several states levy no income tax at all while others apply their own progressive schedules, and some cities add a local income tax on top.
What is the standard deduction?
It is a fixed amount subtracted from income before tax is calculated, available without documenting individual expenses. For 2026 it is $16,100 for single filers, $32,200 for married filing jointly, and $24,150 for heads of household.
Does it include Social Security and Medicare?
No. Those FICA payroll taxes are separate from income tax and are calculated on gross wages rather than taxable income. Use the Paycheck Calculator to see income tax and FICA together.
When should I itemize instead?
Itemize only when your deductible expenses — mortgage interest, state and local taxes within the cap, charitable gifts, and large medical costs — exceed the standard deduction. Because the standard deduction is substantial, the large majority of filers do better taking it.
What is the difference between a deduction and a credit?
A deduction reduces the income being taxed, so its value equals the deduction times your marginal rate. A credit reduces the tax bill itself dollar for dollar, making it considerably more valuable than a deduction of the same size.
How do tax refunds work?
A refund is the return of tax withheld from your paychecks in excess of what you actually owed. It is not a bonus or a reward — a consistently large refund suggests your withholding is set too high and you could adjust your Form W-4.
What should I do if I owe more than expected?
File on time regardless, since penalties for failing to file exceed those for failing to pay. The IRS offers payment plans for balances that cannot be settled immediately, and adjusting your W-4 prevents the same surprise next year.
Are capital gains taxed at these rates?
Not necessarily. Long-term capital gains and qualified dividends have their own preferential rate schedule, while short-term gains are taxed as ordinary income at the rates shown here. This calculator models ordinary income only.
How does filing status change the outcome?
Filing status sets both the standard deduction and the bracket thresholds. Married filing jointly has the widest brackets, head of household sits between single and joint, and married filing separately compresses the upper brackets substantially.
Related calculators
Related guides
Sources
- IRS — Federal income tax rates and brackets
- IRS — Topic no. 501, Should I itemize?
- IRS — Credits and deductions
- IRS — Publication 17, Your Federal Income Tax
How this page is produced
Editorial process. CentCompass is maintained independently, and this page is written and checked against the official publications listed above before it goes live. There is no separate editorial reviewer. This page was last checked on . See our editorial policy.
How the calculations work. Every result comes from a small, unit-tested calculation engine rather than a spreadsheet or a hardcoded table. Loans use the standard amortization formula, growth uses compound-interest math, income tax applies the federal progressive brackets, and payroll applies Social Security and Medicare rules. Our methodology sets out each one.
Where the figures come from. Tax brackets, standard deductions, FICA parameters, and contribution limits are stored once in a dated registry and read directly by the calculators — the same values appear in the text above, so the two can never drift apart. Each figure records its source, effective tax year, and review status on our data sources page.
Update policy. Regulatory figures are checked against their primary source when the IRS, SSA, or another authority publishes new values — typically each autumn for the following tax year — and again at the scheduled review date recorded for each dataset. Figures that have not been checked yet are marked as draft on the data sources page until that check is complete.
Educational purposes only — not financial, tax, or investment advice (disclaimer).