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Tax Bracket Estimator

Estimate US federal income tax based on 2024 tax brackets

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About US Tax Brackets (2024)

Uses 2024 US federal income tax brackets. This is an estimate only and does not include state taxes, deductions, or credits. Consult a tax professional for accurate filing.

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About This Tool

Estimates US federal income tax for the 2024 tax year (filed in 2025) by applying marginal brackets to taxable income. Filing statuses supported: single, married filing jointly, married filing separately, head of household. Standard deduction is applied unless overridden.

Output shows tax owed at each bracket, total tax, effective tax rate, and marginal rate. State tax, FICA, AMT, and credits are not modeled; this is a federal-bracket estimate only.

The US federal income tax is progressive: rates increase as income rises, but each rate applies only to the portion of income within that bracket. A common confusion is the belief that crossing a bracket means all income gets taxed at the higher rate; the correct interpretation is that only the income above the threshold faces the higher rate. The marginal-effective gap reflects this: someone in the 24% bracket has a marginal rate of 24% (the rate on the next dollar) but an effective rate around 14–18% (total tax divided by total income).

The 2024 single-filer brackets: 10% up to $11,600, 12% to $47,150, 22% to $100,525, 24% to $191,950, 32% to $243,725, 35% to $609,350, 37% above. Married-filing-jointly brackets are roughly double those thresholds. The standard deduction in 2024 is $14,600 for single filers and $29,200 for joint filers, subtracted from gross income before applying brackets.

A worked example for a single filer with $80,000 gross income, no other adjustments. Standard deduction reduces to $65,400 taxable income. Tax: 10% × $11,600 = $1,160; 12% × ($47,150 − $11,600) = $4,266; 22% × ($65,400 − $47,150) = $4,015. Total federal income tax: $9,441. Effective rate: 11.8% on gross, 14.4% on taxable income. Marginal rate: 22%. Adding state tax (varies by state, 0–13%) and FICA (7.65% on the first $168,600) brings the all-in tax burden closer to 25–30%.

The TCJA brackets in effect from 2018 through 2025 are scheduled to sunset in 2026 absent legislative action, reverting to pre-TCJA rates with different breakpoints. The estimator updates annually; using the wrong year's brackets produces meaningfully wrong numbers.

Limitations are substantial enough that the estimator should not be used for filing. It excludes credits (Child Tax Credit, Earned Income Credit, retirement savings contribution credit), Alternative Minimum Tax (which can apply to high earners with many deductions), the Net Investment Income Tax (3.8% on investment income above thresholds), and the Additional Medicare Tax (0.9% above $200,000 single). State tax varies wildly; California's top rate of 13.3% applies above $1M while seven states have no income tax. Final filing requires either tax software (TurboTax, FreeTaxUSA, IRS Free File) or a preparer; the estimator is suitable for paycheck planning and rough scenario analysis only.

The about text and FAQ on this page were drafted with AI assistance and reviewed by a member of the Coherence Daddy team before publishing. See our Content Policy for editorial standards.

Frequently Asked Questions

What is the difference between marginal and effective rate?
Marginal rate is the tax on the next dollar of income. Effective rate is total tax divided by total income. A taxpayer in the 24% bracket has a marginal rate of 24% but an effective rate around 14–18% because lower brackets apply to earlier income tiers.
Why is taxable income not the same as gross income?
Taxable income equals gross income minus above-the-line adjustments (IRA contributions, student loan interest) and either the standard deduction or itemized deductions. The brackets apply to taxable income, not gross income. The gap is typically 15–25% for a standard filer.
How are bracket changes from year to year handled?
Brackets adjust annually for inflation. The 2024 bracket boundaries differ from 2023 by roughly 5%. Rates remained constant from 2018 to 2025 under the TCJA; sunset provisions may change rates from 2026 onward absent legislative action.
Does this account for capital gains?
No. Long-term capital gains use a separate three-bracket schedule (0%, 15%, 20%) and are taxed independently of ordinary income. Short-term capital gains are taxed at ordinary rates and would be included in the input as ordinary income.
Is the result safe for filing?
No. The estimate ignores credits (Child Tax Credit, Earned Income Credit), AMT, additional Medicare tax, and net investment income tax. Use IRS-issued software or a tax preparer for actual filing. The estimate is suitable for paycheck planning and rough projections.
Why is the standard deduction so much higher post-TCJA?
The 2017 Tax Cuts and Jobs Act roughly doubled the standard deduction while limiting itemized deductions (notably capping SALT at $10,000). The result: about 90% of filers now take the standard deduction, up from 70% pre-TCJA. The change simplified filing for most people but reduced the tax benefit of mortgage interest and charitable deductions for many.
How does this differ from withholding?
Withholding is the employer's estimate of annual tax, distributed across paychecks. Actual tax owed at filing is the bracket-based calculation. The W-4 controls withholding accuracy; over-withholding produces a refund (an interest-free loan to the government), under-withholding produces a balance due plus possible underpayment penalty.