US federal income tax estimator Estimate 2025 US federal income tax from gross income, filing status, deductions, credits, and federal withholding. The calculator shows bracket-by-bracket tax, effective and marginal rates, after-tax income, and an estimated refund or amount due when withholding is entered.
Display currency
Amounts are formatted with your preferred currency, but the tax brackets and standard deduction remain 2025 US federal rules.
Try a common scenario
Presets fill the gross income, filing status, estimated withholding, and common credit assumptions so you can compare a quick federal tax estimate before fine-tuning your own return inputs.
Optional withholding and credits
Enter estimated federal withholding or nonrefundable tax credits to turn the liability estimate into a refund-or-balance check. Leave them blank to view tax before payments.
Scope
This page is for US federal income tax only. It excludes state income tax, Social Security and Medicare payroll taxes, AMT, NIIT, refundable-credit rules, itemized-deduction phaseouts, and filing software checks.
Result
$7,949.00
Estimated 2025 US federal income tax after entered credits on $75,000.00 gross income (single).
Tax before credits
$7,949.00
Effective tax rate
10.6%
Marginal tax rate
22%
After-tax income
$67,051.00
Monthly after-tax
$5,587.58
Biweekly after-tax
$2,578.88
Taxable income
$59,250.00
Deduction applied
$15,750.00
Standard deduction
$15,750.00
Bracket context
At this income, the last taxable dollar is in the 22% bracket. With the same deduction, about $44,100.00 of taxable income remains before the 24% bracket begins, roughly $119,100.00 of gross income.
Bracket breakdown
Rate
Bracket range
Taxable
Tax
10%
$0.00 – $11,925.00
$11,925.00
$1,192.50
12%
$11,925.00 – $48,475.00
$36,550.00
$4,386.00
22%
$48,475.00 – $103,350.00
$10,775.00
$2,370.50
How to use this result
This is a simplified 2025 federal estimate. It does not include state taxes, FICA, tax credits, AMT, NIIT, or other return-level adjustments. Consult a tax professional for filing or planning decisions.
Income tax calculator guide: brackets, deductions, and effective rate
A US federal income tax calculator estimates your federal tax liability from gross income, filing status, deductions, credits, and withholding.
How marginal tax brackets work
The US federal income tax system uses progressive marginal brackets. Each bracket applies its rate only to income within that range, not to your entire income. Moving into a higher bracket does not retroactively increase the rate on income already taxed at lower rates.
For 2025, a single filer with 59,250 of taxable income pays 10% on the first 11,925, 12% on the next layer up to 48,475, and 22% on the remaining amount above 48,475. The total tax is the sum of each bracket contribution, and the effective rate is that total divided by gross income.
The calculator also shows how much room remains in the current marginal bracket before the next federal tax bracket begins. That makes the result more useful for salary planning, bonus planning, and deduction comparisons than a bare tax-number estimate.
Taxable income = Gross income - Deduction applied
Subtract the standard deduction or your custom deduction amount from gross income to find the amount subject to federal tax.
Effective rate = (Total tax / Gross income) x 100
The effective tax rate is the overall percentage of gross income paid in federal income tax, typically lower than the marginal rate.
2025 standard deductions and custom deductions
The standard deduction reduces taxable income before brackets are applied. For 2025, the standard deduction is 15,750 for single and married-filing-separately filers, 31,500 for married filing jointly, and 23,625 for head of household filers.
Many taxpayers benefit from the standard deduction, but some planning scenarios are easier to test with a custom deduction amount instead. This calculator supports both paths so you can compare the default federal deduction with an alternate deduction assumption.
Custom deductions can also be used as a planning shortcut for above-the-line deductions, itemized deductions, or other allowed deduction assumptions you want to test. The calculator does not decide eligibility for those deductions; it simply applies the amount you enter before the tax brackets are calculated.
From federal tax liability to refund or amount due
A federal income tax estimate is most useful when it distinguishes tax liability from tax payments. Tax before credits is the bracket-based federal income tax on taxable income. Tax credits then reduce that liability, while federal withholding or estimated tax payments are compared against the remaining tax to estimate a refund or amount due.
This page keeps those steps separate. You can leave withholding and credits blank for a clean federal tax-bracket calculation, or enter them to approximate whether the current payments are running ahead of or behind the federal income tax estimate. That mirrors the practical question many users bring to an income tax calculator: not just what tax is owed, but whether a refund or balance is likely.
The estimate treats entered credits as nonrefundable and simplified. Real tax credits can have refundable portions, income phaseouts, qualifying-child rules, education rules, and other eligibility details that a simple calculator cannot verify.
Further reading
IRS: Tax withholding estimator — Official IRS estimator for more detailed withholding checks using paystub and household information.
Worked example: single filer earning 75,000
A single filer with 75,000 of gross income and the 2025 standard deduction has 59,250 of taxable income. The tax is 10% on the first 11,925 (1,192.50), 12% on the next 36,550 (4,386), and 22% on the remaining 10,775 (2,370.50). Total federal tax is 7,949, giving an effective rate of about 10.60% and a marginal rate of 22%.
After-tax income before payroll and state taxes is 75,000 minus 7,949, or 67,051. That is about 5,587.58 per month or 2,578.88 per biweekly pay period after federal income tax only. The bracket breakdown is useful because it shows why your marginal rate is not the same as your overall effective rate.
If the same filer entered 6,500 of federal withholding and no credits, the simplified balance check would show tax after credits still above payments by 1,449. If the filer expected 2,000 of eligible nonrefundable credits, tax after credits would fall to 5,949 and the withholding comparison would instead show a 551 overpayment.
What this estimate excludes
This calculator is a federal income-tax estimator only. It does not include state income taxes, Social Security and Medicare payroll taxes, refundable-credit rules, the alternative minimum tax, the net investment income tax, or filing-status nuances beyond the standard deduction and bracket structure.
It is best used for tax planning, salary comparisons, refund-or-bill previews, and withholding conversations, not as a replacement for a full tax return. For detailed withholding or filing decisions, compare the estimate with official IRS tools and your own tax records.
Because the page is the US-specific peer to separate UK, Pakistan, and Philippines income tax calculators, its keyword focus is federal income tax calculator and US income tax calculator intent rather than broad country-neutral income tax advice.
IRS: Tax withholding estimator — Official IRS tool for estimating withholding more comprehensively than a simplified bracket model.
Frequently asked questions
What is the difference between effective and marginal tax rate?
The marginal rate is the percentage applied to the last dollar of taxable income, while the effective rate is total tax divided by gross income. The effective rate is usually lower because earlier layers of income are taxed at lower rates.
Does moving into a higher tax bracket mean all my income is taxed at that rate?
No. Only the income inside the higher bracket is taxed at the higher rate. Lower layers of income keep their lower bracket rates.
Why would I use a custom deduction instead of the standard deduction?
A custom deduction is useful for planning scenarios when you want to test an alternate deduction assumption rather than the default standard deduction. It is still a simplified estimate, not a full itemized-return model.
Does this calculator include state taxes or FICA?
No. This is a federal income-tax estimate only. State income taxes and payroll taxes such as Social Security and Medicare are not included.
Can this income tax calculator estimate my refund or bill?
Yes, as a simplified federal estimate. Enter federal income tax withheld and any nonrefundable credits you want to model, and the calculator compares those payments against tax after credits to show an estimated refund or amount due.
Why does the calculator show tax before credits and tax after credits?
Tax before credits is the bracket-based federal tax on taxable income. Tax after credits subtracts the credit amount you enter, which is the number used for after-tax income and the withholding comparison.
Does this show take-home pay?
It shows after-tax income after federal income tax only, including monthly and biweekly equivalents. It is not a full paycheck calculator because it excludes state tax, Social Security, Medicare, benefits, retirement contributions, and employer payroll rules.
What does room before the next bracket mean?
Room before the next bracket is the remaining taxable income in your current marginal bracket. It helps you understand how much additional taxable income could be added before the next higher federal marginal rate applies.
