Home Tax Calculators Income Tax Calculator
Free Online Tool

Inflation Calculator — Future Value of Money

See how inflation erodes purchasing power and find the future value of today’s money.

Income Tax Calculator (2024)

$
$
$

The income tax calculator below estimates your annual federal income tax liability based on the 2024 U.S. federal tax brackets, your filing status, gross income, and deductions. It applies the standard deduction by default but allows you to enter itemized deductions if yours exceed the standard amount.

This tool uses progressive (marginal) tax brackets — meaning different portions of your income are taxed at different rates, not your entire income at your top rate. Understanding marginal versus effective tax rate is one of the most important concepts in personal finance, and this calculator shows both side by side.

How This Calculator Works

U.S. federal income tax uses a progressive bracket system. For 2024 (taxes filed in 2025), the seven brackets are: 10%, 12%, 22%, 24%, 32%, 35%, and 37%. Each bracket applies only to the portion of income that falls within its range.

The calculation proceeds in four steps:

  1. Calculate taxable income = Gross income − Deductions (standard or itemized)
  2. Apply marginal brackets — each chunk of taxable income is taxed at the rate for the bracket it falls into
  3. Sum the bracket taxes to get total federal tax
  4. Calculate effective rate = Total tax ÷ Gross income

The standard deduction for 2024 is: $14,600 (Single), $29,200 (Married Filing Jointly), $21,900 (Head of Household).

When to Use This Calculator

Use this income tax calculator when you want to:

  • Estimate your annual tax liability before filing
  • Compare the impact of a raise, bonus, or side income on your taxes
  • Decide whether to take the standard deduction or itemize
  • See your effective vs marginal tax rate for financial planning
  • Plan withholding adjustments to avoid a surprise bill at tax time

Example Calculation

A single filer earning $85,000 in 2024 with the standard deduction ($14,600):

  • Taxable income: $85,000 − $14,600 = $70,400
  • 10% on first $11,600 = $1,160
  • 12% on $11,601–$47,150 = $4,266
  • 22% on $47,151–$70,400 = $5,115
  • Total federal tax: ≈ $10,541
  • Effective rate: 12.4% (on gross income)
  • Marginal rate: 22%

Notice the effective rate (12.4%) is much lower than the top marginal rate (22%) — because most of the income is taxed at the lower 10% and 12% brackets.

FAQ

Frequently Asked Questions

What is the difference between marginal and effective tax rate?

Your marginal tax rate is the rate applied to your next dollar of income — the bracket your top dollar falls into. Your effective tax rate is your total tax divided by your total income, which is always lower than your marginal rate because of the progressive bracket system. For example, a single filer earning $85,000 has a 22% marginal rate but only a 12.4% effective rate on gross income.

Should I take the standard deduction or itemize?

Take whichever is larger. For 2024, about 90% of taxpayers take the standard deduction because the TCJA nearly doubled it. Itemize only if your total of mortgage interest, state/local taxes (capped at $10,000), charitable contributions, and medical expenses (over 7.5% AGI) exceeds the standard amount for your filing status.

Does this calculator include state income tax?

No — this calculator estimates federal income tax only. State income tax rates vary widely, from 0% (Texas, Florida, Washington, Nevada, South Dakota, Wyoming, Alaska) to over 13% (California top bracket). Add your state tax separately for a complete picture of your total tax burden.

Are FICA taxes (Social Security and Medicare) included?

No. This calculator estimates federal income tax only. Social Security tax is 6.2% on wages up to $168,600 (2024 wage base) and Medicare is 1.45% on all wages (plus 0.9% additional Medicare on high earners). Your employer withholds these separately from income tax.

How accurate are the 2024 tax brackets used?

The brackets and standard deductions reflect IRS 2024 figures (for taxes filed in early 2025). Tax laws change; always verify current-year figures on IRS.gov before finalizing decisions. This calculator does not account for credits (Child Tax Credit, Earned Income Credit), additional Medicare tax, or Net Investment Income Tax.

What if I have capital gains or self-employment income?

Long-term capital gains are taxed at preferential rates (0%, 15%, or 20%) separate from ordinary income. Self-employment income is subject to an additional 15.3% SE tax (the employer + employee halves of FICA). This calculator handles ordinary W-2 wage income only — use our dedicated capital gains and other specialized calculators for those scenarios.

Related Calculators

VAT Calculator
Add VAT to a net amount or extract VAT from a gross price with any VAT rate worldwide.
Sales Tax Calculator
Compute the final price of any product including state and local sales tax.
Capital Gains Tax Calculator
Estimate capital gains tax on the sale of stocks, property or other assets.

Related Guides

Tax Calculators

Tax Planning for Investors: Keep More of Your Returns

Tax-loss harvesting, asset location, wash-sale rules — advanced but accessible strategies to legally minimize investment taxes.

12 min read
Tax Calculators

Capital Gains Tax Explained: Short-Term vs Long-Term

Selling an investment? The holding period determines your tax rate. Here’s how short-term and long-term capital gains taxes actually work.

11 min read
Tax Calculators

12 Tax Deductions You Might Be Missing

The standard deduction is easy, but itemizing could save thousands. Here are twelve overlooked deductions from home offices to HSA contributions.

10 min read
Important Disclaimer:

This inflation calculator is provided for informational and educational purposes only and does not constitute financial, tax, legal or investment advice. Results are estimates based on the inputs you provide and standard formulas; actual figures may vary due to rounding, jurisdiction-specific rules, fees, or changing market conditions. Always consult a licensed financial advisor, tax professional, or legal counsel before making decisions based on these calculations. See our full Disclaimer.

R
Rachel Hammond
CFP® — Certified Financial Planner

Rachel is a Certified Financial Planner with over 14 years of experience guiding individuals and families through tax planning, retirement strategy and investment management. She holds a degree in Economics from the University of Michigan and has been quoted in Forbes, CNBC and The Wall Street Journal.

CFP® Certified 14+ years experience Quoted in Forbes & CNBC