Income Tax Calculator
Enter your income and filing status to estimate your federal income tax. See your total tax, effective rate, marginal rate, and take-home pay all at once.
How Federal Income Tax Brackets Work
The U.S. uses a progressive tax system with seven brackets. Each bracket taxes a portion of your income at a different rate. Many people misunderstand this and think moving to a higher bracket means all their income is taxed at the higher rate. That's not how it works.
For 2024, a single filer pays 10% on the first $11,000, 12% on income from $11,001 to $44,725, 22% on income from $44,726 to $95,375, and so on. If you earn $50,000, only the dollars above $44,725 are taxed at 22%. The first $44,725 is taxed at lower rates.
This is why your marginal rate (the rate on your last dollar) is higher than your effective rate (your average rate across all income). Understanding this helps you make smarter decisions about raises, bonuses, and retirement contributions.
Standard Deduction vs Itemizing
The standard deduction is a flat amount that reduces your taxable income. For 2024, it's $13,850 for single filers, $27,700 for married couples filing jointly, and $20,800 for heads of household. Most people take the standard deduction because it's higher than what they could itemize.
You itemize when your deductible expenses exceed the standard amount. Common itemized deductions include mortgage interest, property taxes (capped at $10,000), charitable donations, and medical expenses above 7.5% of income. Since the Tax Cuts and Jobs Act nearly doubled the standard deduction in 2018, far fewer people benefit from itemizing.
Run the numbers both ways. If your itemized total beats the standard deduction, itemize. If not, take the standard. You can switch between them year to year depending on your situation.
Reducing Your Taxable Income
The best way to lower your tax bill is to reduce taxable income before it's taxed. Pre-tax retirement contributions to a 401(k) or traditional IRA come right off the top. Contribute $6,000 to an IRA and your taxable income drops by $6,000.
Health Savings Accounts (HSAs) offer triple tax benefits: contributions are pre-tax, growth is tax-free, and withdrawals for qualified medical expenses are tax-free. If you have a high-deductible health plan, max out your HSA before other accounts.
Self-employed individuals can deduct business expenses, health insurance premiums, and half of self-employment tax. Strategies like depreciation, home office deductions, and retirement plan contributions for the self-employed can significantly cut taxable income. The key is to plan ahead and keep good records throughout the year.
Frequently Asked Questions
What's the difference between marginal and effective tax rates?
Your marginal rate is the tax on your last dollar earned. Your effective rate is total tax divided by total income. The effective rate is always lower because lower brackets apply to your first dollars.
Should I take the standard deduction or itemize?
Take the standard deduction unless your itemized deductions (mortgage interest, property taxes, charitable donations, medical expenses) exceed the standard amount.
Does this include state taxes?
No. This calculator shows federal tax only. State income tax varies by state, from 0% to over 13% in California.
Are Social Security and Medicare taxes included?
No. FICA taxes (7.65% for employees) are separate from income tax. Self-employed individuals pay both halves, totaling 15.3%.
How accurate is this estimate?
It's close for W-2 employees with simple returns. Credits, deductions, and other income sources can change your actual tax bill.