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Free Income Tax Calculator 2024 — Federal Tax Bracket Estimator

Estimate your 2024 federal income tax, effective rate, marginal bracket, and after-tax take-home pay based on your filing status and gross income.

This free income tax calculator applies 2024 IRS federal tax brackets and the standard deduction to estimate your federal tax liability, FICA taxes, and take-home income. For informational purposes — consult a tax professional for precise tax advice. No sign-up required.

How US Federal Income Tax Works

The US uses a progressive tax system with seven brackets in 2024: 10%, 12%, 22%, 24%, 32%, 35%, and 37%. These rates do not apply to all your income — only to the income within each bracket's range. Most Americans pay an effective rate 5–10% below their marginal bracket.

Before brackets apply, your taxable income is calculated: Gross Income − Standard Deduction (or itemized deductions) − other adjustments. Pre-tax 401(k) and traditional IRA contributions reduce this number, lowering your tax bill. A $10,000 401(k) contribution at the 22% bracket saves $2,200 in taxes.

FICA taxes (Social Security + Medicare) are separate from income tax and apply regardless of deductions. Social Security = 6.2% on income up to $168,600 in 2024. Medicare = 1.45% on all income (plus 0.9% additional Medicare tax on income above $200,000 for singles). Pair this with our salary calculator to see your complete pay breakdown.

2024 Federal Tax Brackets

RateSingleMarried Jointly
10%$0 – $11,600$0 – $23,200
12%$11,601 – $47,150$23,201 – $94,300
22%$47,151 – $100,525$94,301 – $201,050
24%$100,526 – $191,950$201,051 – $383,900
32%$191,951 – $243,725$383,901 – $487,450
35%$243,726 – $609,350$487,451 – $731,200
37%Over $609,350Over $731,200

Frequently Asked Questions

How do US tax brackets work?
US income tax is progressive — each bracket rate applies only to income within that bracket, not all income. For a single filer with $75,000 in taxable income (2024): 10% on first $11,600 = $1,160. 12% on $11,601–$47,150 = $4,266. 22% on $47,151–$75,000 = $6,127. Total = $11,553. Effective rate = 15.4%. Your marginal rate is 22%, but you don't pay 22% on all income.
What is the standard deduction for 2024?
2024 standard deductions: Single = $14,600. Married Filing Jointly = $29,200. Married Filing Separately = $14,600. Head of Household = $21,900. This is automatically deducted from your gross income before tax brackets apply. You only itemize if your deductions (mortgage interest, charitable donations, state taxes up to $10,000) exceed the standard deduction.
What is the difference between effective and marginal tax rates?
Marginal rate = the tax rate on your last dollar earned (your highest bracket). Effective rate = the actual percentage of your total income paid in federal taxes. On $75,000 gross income (single, 2024): marginal rate = 22%, but federal tax = $11,553, making effective rate = 15.4%. This is why "I got a raise and it pushed me into a higher bracket" doesn't mean your take-home pay decreases — only income above the bracket threshold is taxed at the higher rate.
How much federal income tax do I pay on $50,000 a year?
Single filer, 2024: $50,000 gross − $14,600 standard deduction = $35,400 taxable income. Tax: 10% × $11,600 = $1,160 + 12% × $23,800 = $2,856. Total federal tax = $4,016. Effective rate = 8%. Plus Social Security (6.2%) and Medicare (1.45%) = $3,772 FICA. Total tax burden = $7,788. Take-home = ~$42,212 annually, or ~$3,518/month.
Does filing jointly save taxes vs filing single?
Married filing jointly typically saves taxes through the "marriage bonus" — combined income is taxed at lower bracket thresholds. Example: two people each earning $50,000 ($100K combined). Filing single: each pays ~$8,000 federal tax = $16,000 total. Filing jointly: $100K combined − $29,200 deduction = $70,800 taxable, tax = ~$10,000. Savings = $6,000. The marriage penalty applies when incomes are similar and push into higher brackets — largely eliminated by current brackets.
What reduces my taxable income?
Pre-tax contributions that reduce taxable income: 401(k) traditional (up to $23,500 in 2024). Traditional IRA (up to $7,000). HSA contributions ($4,150 single, $8,300 family). Student loan interest (up to $2,500). $23,500 in 401(k) contributions on $75,000 salary reduces taxable income to $51,500 — saving ~$3,500 in federal taxes (at 22% marginal rate). Roth IRA does not reduce current-year taxes but is tax-free in retirement.

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