Income Tax Calculator
Calculate your 2024 federal income tax. Estimate taxable income, tax owed, effective tax rate, and marginal rate for all filing statuses. Free instant results.
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CalcLeap Editorial Team
Reviewed by certified professionals · Last updated April 1, 2026
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📐 How We Calculate This
Our calculator uses the latest federal and state tax brackets published by the IRS and state revenue departments. We apply standard deductions, personal exemptions, and marginal tax rates for the current tax year.
Results account for filing status, income level, and applicable credits. We update our tax data within 48 hours of any IRS or state announcements. For complex situations (AMT, self-employment, capital gains), consult a licensed CPA.
📚 Sources & References
Frequently Asked Questions
What are the 2024 federal income tax brackets?
For 2024, there are seven federal tax brackets: 10%, 12%, 22%, 24%, 32%, 35%, and 37%. The income thresholds vary by filing status. For single filers, the brackets start at $11,600 (10%), $47,150 (12%), $100,525 (22%), $191,950 (24%), $243,725 (32%), $609,350 (35%), and above (37%).
Should I take the standard deduction or itemize?
Take whichever is larger. The 2024 standard deduction is $14,600 for single filers, $29,200 for married filing jointly, $14,600 for married filing separately, and $21,900 for head of household. Itemize only if your deductible expenses (mortgage interest, state/local taxes, charitable donations, medical expenses) exceed the standard deduction.
What's the difference between marginal and effective tax rate?
Your marginal tax rate is the rate applied to your last dollar of income — your highest bracket. Your effective tax rate is the average rate across all your income (total tax ÷ gross income). For example, someone earning $100,000 might have a 22% marginal rate but only a ~15% effective rate because the first portions of income are taxed at lower brackets.
Does this calculator include state income tax?
No, this calculator estimates federal income tax only. State income tax varies significantly — some states like Texas and Florida have no income tax, while others like California can add 9–13% on top. Check our state-specific calculators for complete estimates.
Are Social Security and Medicare taxes included?
This calculator focuses on federal income tax only. Social Security tax (6.2% on income up to $168,600 in 2024) and Medicare tax (1.45% on all income, plus 0.9% additional Medicare tax on income over $200,000) are separate payroll taxes not included in these results.