Estimated Federal Tax
Taxable Income
Effective Tax Rate
After-Tax Income
Table of Contents
How is income tax calculated?
The US uses a progressive tax system, meaning you only pay each rate on the income that falls within that bracket — not on your total income. This calculator applies the 2025 and 2026 federal tax brackets and standard deduction to give you an instant estimate.
What is a progressive tax system?
A progressive tax system applies higher rates to higher income levels, but only to the income within each bracket. For example, if you earn $50,000 as a single filer in 2025, you do not pay 22% on the full $50,000. You pay 10% on the first $11,925, 12% on the next $36,550, and 22% only on the remaining amount above $48,475.
This means your effective tax rate — total tax divided by total income — is always lower than your marginal rate (the rate of the highest bracket you reach).
What is the standard deduction?
The standard deduction is a fixed amount that reduces your taxable income. For 2025, single filers can deduct $15,000, married couples filing jointly can deduct $30,000, and heads of household can deduct $22,500.
You do not pay tax on income up to the standard deduction amount. If your gross income is $60,000 and you are a single filer, your taxable income is $60,000 – $15,000 = $45,000.
What is the difference between marginal and effective tax rate?
Your marginal tax rate is the rate on your last dollar of income — the highest bracket you reach. Your effective tax rate is the actual percentage of your gross income paid in tax. Because of the progressive system, the effective rate is always lower than the marginal rate.
For example, someone earning $75,000 as a single filer falls into the 22% bracket, but their effective federal tax rate is closer to 13% because most of their income is taxed at 10% and 12%.
What is not included in this calculator?
This calculator estimates federal income tax only. It does not account for:
- State income taxes (which vary significantly by state)
- Social Security tax (6.2% on wages up to $168,600)
- Medicare tax (1.45%, plus 0.9% above $200,000)
- Self-employment taxes
- Tax credits (such as the Child Tax Credit or Earned Income Credit)
- Capital gains or investment income
For a complete picture of your total tax burden, use our Take Home Pay Calculator which includes FICA taxes alongside federal income tax.
How to reduce your income tax
There are several legal ways to reduce your taxable income and lower your federal income tax bill:
- Contribute to a traditional 401(k) or IRA — contributions reduce your taxable income
- Contribute to an HSA (Health Savings Account) if eligible
- Itemize deductions if they exceed the standard deduction
- Claim all eligible tax credits, which directly reduce tax owed
- Defer income to years when you expect to be in a lower bracket
When should you consult a tax professional?
This calculator is a useful starting point for estimating your federal tax liability, but it is not a substitute for professional tax advice. You should consider consulting a CPA or tax adviser if you have self-employment income, significant investment gains, multiple income sources, or complex deductions.
FAQs
Federal income tax is calculated using a progressive bracket system. You first subtract the standard deduction from your gross income to get your taxable income. That taxable income is then taxed at increasing rates as it falls into higher brackets — only the income within each bracket is taxed at that bracket's rate.
For 2025, the standard deduction is $15,000 for single filers, $30,000 for married filing jointly, and $22,500 for head of household. For 2026 it increases to $16,100 (single), $32,200 (married filing jointly), and $24,150 (head of household). This amount is subtracted from your gross income before calculating your taxable income.
For single filers in 2025, the rates are: 10% on income up to $11,925; 12% on $11,925–$48,475; 22% on $48,475–$103,350; 24% on $103,350–$197,300; 32% on $197,300–$250,525; 35% on $250,525–$626,350; and 37% on income above $626,350.
Your marginal tax rate is the rate applied to your last dollar of taxable income — it is the highest bracket you reach. Your effective tax rate is the average rate across all your income, calculated by dividing total tax owed by gross income. Most people's effective rate is significantly lower than their marginal rate.
This calculator estimates federal income tax only. It does not include state income taxes, Social Security (6.2%), Medicare (1.45%), self-employment taxes, capital gains taxes, alternative minimum tax (AMT), or tax credits. For a complete picture of your tax liability, consult a tax professional.
Most taxpayers benefit from taking the standard deduction because it is simple and often larger than the sum of individual deductions they could claim. Itemizing makes sense if your qualifying expenses — such as mortgage interest, state taxes, and charitable donations — exceed the standard deduction amount for your filing status.
Single is for unmarried individuals. Married Filing Jointly is typically the most advantageous status for married couples, as it applies wider tax brackets and a higher standard deduction. Head of Household is for unmarried individuals who pay more than half the cost of keeping up a home for a qualifying person.