US Federal Income Tax Calculator 2024 🇺🇸
Calculate your 2024 US federal income tax, FICA (Social Security & Medicare), effective tax rate, and monthly take-home pay for all filing statuses.
Your Income Details
Enter your income details to calculate your 2024 federal tax
2024 US Federal Tax Brackets
| Rate | Single | Married Filing Jointly | Head of Household |
|---|---|---|---|
| 10% | $0–$11,600 | $0–$23,200 | $0–$16,550 |
| 12% | $11,601–$47,150 | $23,201–$94,300 | $16,551–$63,100 |
| 22% | $47,151–$100,525 | $94,301–$201,050 | $63,101–$100,500 |
| 24% | $100,526–$191,950 | $201,051–$383,900 | $100,501–$191,950 |
| 32% | $191,951–$243,725 | $383,901–$487,450 | $191,951–$243,700 |
| 35% | $243,726–$609,350 | $487,451–$731,200 | $243,701–$609,350 |
| 37% | Over $609,350 | Over $731,200 | Over $609,350 |
Standard Deductions 2024
- Single / Married Filing Separately: $14,600
- Married Filing Jointly: $29,200
- Head of Household: $21,900
- Additional $1,550 for taxpayers aged 65+
What Is FICA Tax?
FICA stands for the Federal Insurance Contributions Act. It funds Social Security and Medicare:
- Social Security: 6.2% on wages up to $168,600 (2024 wage base)
- Medicare: 1.45% on all wages; additional 0.9% on wages over $200,000
- Employers match the 6.2% SS and 1.45% Medicare — so the full cost is 15.3%
This Calculator Does Not Include
- State income tax (varies by state — 0% to 13.3%)
- 401(k) / IRA / HSA pre-tax contribution reductions
- Tax credits (Child Tax Credit, Earned Income Credit, etc.)
- Self-employment tax (SE tax is 15.3% for self-employed)
How US Federal Income Tax Is Actually Calculated
The United States uses a progressive, marginal tax system. This is the single most misunderstood part of US taxes: moving into a higher bracket does not mean all of your income is taxed at that higher rate. Instead, each portion of your income is taxed only at the rate for its own bracket. Your income is first reduced by the standard deduction (or itemised deductions), and the remaining taxable income is then sliced across the brackets.
Worked Example
Consider a single filer earning $60,000 in 2024. After the $14,600 standard deduction, taxable income is $45,400. The tax is calculated in layers: the first $11,600 is taxed at 10% ($1,160), and the remaining $33,800 (from $11,601 to $45,400) is taxed at 12% ($4,056). Total federal income tax is $5,216. Even though this person is “in the 22% bracket” range of earners, their top rate is only 12% because their taxable income never reaches the 22% threshold.
Marginal Rate vs Effective Rate
Your marginal rate is the rate applied to your last dollar of income (the bracket you top out in). Your effective rate is the total tax divided by your total income — always lower than the marginal rate because of the layered calculation. In the example above, the marginal rate is 12% but the effective rate is just $5,216 ÷ $60,000 = 8.7%. Understanding this distinction prevents the common myth that “a raise can push you into a higher bracket and leave you worse off,” which is mathematically impossible under a marginal system.
Pre-Tax Deductions That Lower Your Bill
Contributions to a traditional 401(k), traditional IRA, or Health Savings Account (HSA) are deducted before tax is calculated, directly reducing your taxable income. For example, contributing $5,000 to a 401(k) on a 22% marginal rate saves $1,100 in federal tax this year. This calculator shows the baseline before such reductions, so your actual tax may be lower if you use these accounts.
Refund vs Owing at Filing Time
Throughout the year, your employer withholds tax from each paycheck based on your Form W-4. At filing time you reconcile what was withheld against what you actually owe: if too much was withheld you receive a refund, and if too little was withheld you owe the difference. A large refund is not free money — it means you lent the government interest-free for the year. Adjusting your W-4 to match your real liability keeps more money in each paycheck.
Frequently Asked Questions — US Income Tax Calculator
For 2024, the federal tax brackets for single filers are: 10% (up to $11,600), 12% ($11,601–$47,150), 22% ($47,151–$100,525), 24% ($100,526–$191,950), 32% ($191,951–$243,725), 35% ($243,726–$609,350), and 37% (over $609,350). Married filing jointly thresholds are roughly double.
Your marginal tax rate is the rate applied to your last dollar of income (the highest bracket you reach). Your effective tax rate is the average rate across all your income — typically much lower. For example, someone in the 22% bracket might have an effective rate of only 13–15% after the lower rates on earlier income.
FICA (Federal Insurance Contributions Act) funds Social Security and Medicare. In 2024: Social Security is 6.2% on wages up to $168,600, and Medicare is 1.45% with no wage cap (plus an additional 0.9% for income over $200,000 single/$250,000 joint). Employers match these amounts, so the total FICA is effectively 15.3% for self-employed individuals.
You should itemize if your deductible expenses (mortgage interest, state/local taxes up to $10,000, charitable donations, medical expenses over 7.5% of AGI) exceed the standard deduction. For 2024: $14,600 (single), $29,200 (married filing jointly). Most Americans take the standard deduction — only about 10% itemize since the 2017 tax reform nearly doubled the standard amount.
Key strategies: (1) Max out pre-tax retirement accounts — 401k ($23,000 limit in 2024) reduces taxable income dollar-for-dollar. (2) Contribute to an HSA if you have a high-deductible health plan ($4,150 single/$8,300 family). (3) Claim all eligible tax credits (Child Tax Credit, Earned Income Credit, education credits). (4) Time capital gains to stay in the 0% bracket (under ~$47,025 for singles in 2024).
A tax deduction reduces your taxable income, so its value depends on your tax bracket. A $1,000 deduction saves $220 if you're in the 22% bracket. A tax credit directly reduces your tax bill dollar-for-dollar — a $1,000 credit saves exactly $1,000. Credits are generally more valuable than deductions of the same amount.