Income Tax Calculator
Estimate your federal income tax
How Federal Income Tax Works
The US federal income tax system uses progressive tax brackets, meaning different portions of your income are taxed at different rates. Only the income within each bracket is taxed at that bracket's rate, not your entire income. This means your effective tax rate (total tax divided by total income) is always lower than your marginal tax bracket.
2024 Tax Brackets
For single filers, the 2024 brackets are: 10% on income up to $11,600, 12% on income from $11,601 to $47,150, 22% from $47,151 to $100,525, 24% from $100,526 to $191,950, 32% from $191,951 to $243,725, 35% from $243,726 to $609,350, and 37% on income above $609,350. Married filing jointly brackets are roughly double these amounts.
Standard Deduction
The standard deduction reduces your taxable income before tax brackets are applied. For 2024, the standard deduction is $14,600 for single filers, $29,200 for married filing jointly, and $21,900 for head of household. Most taxpayers benefit from taking the standard deduction rather than itemizing.
Important Notes
This calculator estimates federal income tax only. It does not include state taxes, FICA taxes (Social Security and Medicare), self-employment tax, or any tax credits. Your actual tax liability may differ based on deductions, credits, and other factors. Consult a tax professional for personalized advice.
Income Tax Calculator: practical guide
The Income Tax Calculator is built for people who want a fast answer without losing context. It keeps the calculation simple, shows the result clearly, and helps you understand what the number means before you use it in a real decision.
This calculator is designed to make a specific everyday calculation faster and clearer. It gives a structured result so you can compare options, check assumptions, or plan the next step with less manual work.
What is the best way to use the Income Tax Calculator?
Enter the values carefully, review the units, and use the result as a reliable reference point. The Income Tax Calculator is most useful when you compare scenarios or repeat the calculation with consistent inputs.
Is the Income Tax Calculator accurate?
The calculator follows standard calculation logic, but accuracy depends on the values you enter and the assumptions behind the formula. For important finance decisions, use it as guidance and verify the result with a trusted source.
How income tax is calculated
Income tax is calculated on your taxable income — your gross income minus any allowable deductions and exemptions your country's tax law permits. Most countries use a progressive tax system where higher income is taxed at higher rates. The amount of tax you owe depends on your income level, filing status, and the deductions and credits you qualify for.
Taxable Income = Gross Income – Deductions – Exemptions
Tax Owed = Apply tax brackets to taxable income
Progressive tax brackets — how they work
A progressive tax system applies different rates to different portions of your income — not your entire income at the highest rate. Each "bracket" is taxed at its specified rate only for the income that falls within that range.
Example (US 2024 — Single filer):
- 10% on income up to $11,600
- 12% on income $11,601 – $47,150
- 22% on income $47,151 – $100,525
- 24% on income $100,526 – $191,950
- 32% on income $191,951 – $243,725
- 35% on income $243,726 – $609,350
- 37% on income above $609,350
A person earning $80,000 does NOT pay 22% on the full amount. They pay 10% on the first $11,600, 12% on the next $35,550, and 22% on the remaining $32,850 — an effective (average) tax rate of approximately 15%, not 22%.
Marginal rate vs effective tax rate
Your marginal rate is the rate applied to your last dollar of income — the highest bracket you fall into. Your effective rate is the actual percentage of your total income paid in tax after all brackets are applied. The effective rate is always lower than the marginal rate in a progressive system.
Example: $80,000 income, US 2024. Marginal rate = 22%. Tax owed ≈ $12,908. Effective rate = $12,908 / $80,000 = 16.1%
Common tax deductions that reduce taxable income
- Standard deduction: A flat amount most countries allow without requiring itemisation. In the US (2024): $14,600 for single, $29,200 for married filing jointly.
- Retirement contributions: Contributions to pension or retirement accounts (401k, IRA in the US; superannuation in Australia; pension in UK) reduce taxable income.
- Mortgage interest: Homeowners in many countries can deduct mortgage interest from taxable income.
- Health insurance premiums: Self-employed individuals can often deduct health insurance costs.
- Charitable donations: Qualifying donations to registered charities are deductible in most countries.
Frequently asked questions about income tax
What is withholding tax? Withholding tax (called PAYE in the UK, withholding tax in the United States, withholding in the US) is income tax deducted by your employer before you receive your pay. It is an advance payment of your annual tax liability. When you file your tax return, you either receive a refund (if too much was withheld) or pay additional tax (if too little was withheld).
What is the difference between tax avoidance and tax evasion? Tax avoidance is legally reducing your tax liability using permitted deductions, credits, and structures. Tax evasion is illegally hiding income or falsifying deductions. Tax avoidance is legal; tax evasion is a criminal offence.
How do I calculate my effective tax rate? Divide your total tax paid by your gross income. If you earned $75,000 and paid $11,000 in tax, your effective rate = $11,000 / $75,000 = 14.7%.
Key deductions under the old tax regime
- retirement/savings deduction: Up to $150,000 — PF, government savings account, tax-saving mutual fund, NSC, life insurance, home loan principal, children's tuition fees
- health insurance deduction: Health insurance premium — $25,000 (self/family) + $25,000 (parents) + additional for senior citizen parents
- mortgage interest deduction: Home loan interest up to $200,000 for self-occupied property
- housing allowance exemption: Exempt amount based on rent paid, city, and basic salary
- retirement/savings deductionCD(1B): Additional $50,000 for pension fund contribution beyond 80C
Frequently asked questions about income tax
Which tax regime is better for me? If your eligible deductions (80C + 80D + housing allowance + home loan interest) exceed approximately $375,000, the old regime saves more tax. If your deductions are small, the new regime's lower rates are typically better. Use both calculations and choose annually.
What is withholding tax and how is it different from income tax? withholding tax is the advance tax deducted by your employer or bank and deposited to the government on your behalf. It is a prepayment of income tax. The final income tax liability is calculated when you file your ITR — if withholding tax paid exceeds the actual tax, you get a refund; if less, you pay the difference.
What is the tax on salary of $1,000,000 per annum? Under the new regime (FY2025-26) with standard deduction $75,000: taxable income = $925,000. Tax = $20,000 (5% of $4L) + $22,500 (10% of $2.25L) = $42,500 + 4% cess = approximately $44,200.