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Federal Income Tax Estimator (2024)

Estimate your 2024 federal income tax liability using current IRS tax brackets. Enter your filing status and taxable income.

Estimated Federal Income Tax
2024 Standard Deductions: Single / MFS: $14,600 Married Filing Jointly: $29,200 Head of Household: $21,900 2024 Tax Brackets (Single): 10%: $0 – $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 37%: over $609,350

The US uses a progressive "marginal" tax system. Only the income within each bracket is taxed at that rate — not your entire income. Your effective rate is always lower than your marginal (top) rate.

Effective rate is always lower than marginal rate
See IRS Publication 505 for precise withholding guidance

How the US Progressive Tax System Works

The United States uses a progressive marginal tax system, meaning different portions of your income are taxed at different rates. A common misconception is that entering a higher tax bracket causes all of your income to be taxed at the higher rate — this is incorrect and often causes people to fear salary increases unnecessarily.

Here's how it actually works for a single filer with $60,000 in taxable income in 2024: the first $11,600 is taxed at 10% = $1,160. Income from $11,601 to $47,150 is taxed at 12% = $4,266. Income from $47,151 to $60,000 is taxed at 22% = $2,827. Total federal tax: $8,253. Effective tax rate: 13.75%. Marginal rate: 22% — but only that last slice of income was taxed at 22%.

This distinction between marginal rate (the rate on the next dollar earned) and effective rate (average rate across all income) is crucial for financial planning. When someone says "I'm in the 22% bracket," they mean their marginal rate is 22% — not that they pay 22% on everything they earn.

Standard vs Itemized Deductions

Before calculating tax, you subtract deductions from gross income to arrive at taxable income. You choose between two options each year: the standard deduction (a fixed amount based on filing status) or itemizing deductions (listing and summing all qualifying deductions individually).

The 2024 standard deduction is $14,600 for single filers, $29,200 for married filing jointly, and $21,900 for head of household. Itemizable deductions include state and local taxes (capped at $10,000 total), mortgage interest, charitable contributions, medical expenses exceeding 7.5% of AGI, and others.

Take whichever deduction is larger. With the standard deduction substantially higher after the 2017 Tax Cuts and Jobs Act, roughly 90% of taxpayers now take the standard deduction. You should only itemize if your qualifying deductions clearly exceed the standard deduction — worth calculating both ways.

What This Calculator Does Not Include

This estimator calculates federal income tax only on ordinary income. It does not include: self-employment tax (15.3% on net self-employment income), capital gains tax (0%, 15%, or 20% on long-term gains, separate from income tax rates), the Net Investment Income Tax (3.8% on investment income above certain thresholds), Alternative Minimum Tax (AMT), or state and local income taxes.

Self-employed individuals, investors with significant capital gains, and high earners should consult a tax professional or use comprehensive tax software (TurboTax, TaxAct, H&R Block) for accurate estimates. This calculator provides a reasonable estimate for W-2 employees with straightforward tax situations.

Tax credits (Child Tax Credit, Earned Income Credit, education credits) reduce your tax liability dollar-for-dollar and are not factored into this estimate. Depending on your situation, credits can significantly reduce actual tax owed below this estimate.

Frequently Asked Questions

Marginal rate is the rate on your last (highest) dollar of income — the tax bracket you're "in." Effective rate is your total tax divided by total income — the average rate across all income. Effective rate is always lower than marginal rate in a progressive system. For financial planning, effective rate tells you your overall tax burden; marginal rate tells you the tax cost of additional income.
No — only the income above the bracket threshold is taxed at the higher rate. If you earn $47,000 as a single filer in 2024, moving from $47,000 to $50,000 does NOT suddenly tax all $50,000 at 22%. Only the additional $3,000 above $47,150 is taxed at 22%. The first $47,150 continues to be taxed at the lower rates. Salary increases are always beneficial after tax.
Self-employed individuals pay both the employee (6.2% Social Security + 1.45% Medicare) and employer (same amounts) shares of FICA taxes, for a total of 15.3% on net self-employment income up to the Social Security wage base ($168,600 in 2024), plus 2.9% Medicare on amounts above that. This is separate from and in addition to federal income tax, which is why freelancers and business owners often have substantially higher overall tax burdens than W-2 employees at the same gross income.
If you expect to owe at least $1,000 in federal income tax beyond withholding (common for self-employed, investors, and those with multiple income sources), you generally must pay quarterly estimated taxes. Due dates are April 15, June 15, September 15, and January 15 of the following year. Underpayment penalties apply if you pay too little throughout the year, even if you pay the full amount at filing.