Marginal vs effective rate?

Marginal is the rate on your next dollar (your top bracket). Effective is total tax ÷ total income — always lower. GKCalculators shows both.

Does this include state tax or FICA?

No — this is a federal income-tax estimate with the standard deduction. State income tax, Social Security and Medicare are separate.

What formula does the Income Tax Estimator use?

It calculates using Tax = Σ (income in bracket × bracket rate); Effective rate = Tax / Gross. The guide above walks through what each part means with a worked example.

How accurate is the Income Tax Estimator?

It uses standard, widely-accepted financial formulas, so the math is exact for the figures you enter. Real-world numbers can differ once lenders, taxes, fees and rounding are applied, so treat the result as a close estimate rather than a formal quote.

Does the Income Tax Estimator include taxes and fees?

It includes only the fields shown on the form. Where inputs for extra costs (fees, taxes, insurance) are available, add them for a fuller picture — a real quote may still vary by provider.

Is this calculator free to use?

Yes — every GKCalculators calculator is 100% free with no sign-up required. Create a free account only if you want to save your calculation history across devices.

All calculations run instantly in your browser. Nothing is sent anywhere unless you tap ‘Explain my results’ (AI) or ‘Save’ while signed in.

Can I share my result?

Yes. Tap Share and we copy a link with your exact inputs baked in, so anyone who opens it sees the same result.

Income Tax Estimator

Estimate US federal income tax, effective rate and take-home pay by filing status.

Compare

Filing status

Gross annual income (USD)

Estimate only — 2024 US federal brackets with standard deduction ($14,600). Excludes state, FICA & credits.

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Estimated federal tax

$10,541

Effective rate 12.4% · take-home $74,459

Taxable income

$70,400

Effective rate

12.4%

Marginal bracket

22%

Take-home pay

$74,459

Monthly take-home

$6,205

AI Breakdown & Smart Takeaway

Plain-English insight on your numbers

Get a personalized explanation of what these results mean — and how to improve them.

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How the Income Tax Estimator works

The Income Tax Estimator calculates your estimated US federal income tax liability, effective tax rate, and projected take-home pay based on your gross income and filing status. It's built for employees, freelancers, and anyone planning ahead who wants a clear picture of what they owe the IRS before tax season arrives.

The US uses marginal tax brackets: only the income inside each band is taxed at that band’s rate — not your whole income.

We subtract the standard deduction, apply 2024 federal brackets, and report both your marginal bracket and your true effective rate.

Formula

Tax = Σ (income in bracket × bracket rate);  Effective rate = Tax / Gross

Pro tips

Pre-tax 401(k) or HSA contributions lower your taxable income and can drop you a bracket.

Key terms

Marginal Tax Rate: — The IRS tax rate that applies to the last dollar of your taxable income, representing the rate on income within your highest bracket—not on all of your income.
Effective Tax Rate: — Your total federal income tax paid divided by gross income, expressed as a percentage; this reflects your true average rate across all income earned.
Standard Deduction: — A flat dollar amount the IRS allows you to subtract from gross income before calculating tax, with the amount varying by filing status.
Taxable Income: — The portion of your gross income subject to federal income tax after subtracting the standard deduction or total itemized deductions.
Filing Status: — An IRS classification—such as Single, Married Filing Jointly, or Head of Household—that determines which tax brackets and standard deduction amount apply to you.
Tax Bracket: — A range of taxable income to which a specific federal tax rate applies under the US progressive tax system, with rates currently ranging from 10% to 37%.