What tax year does this calculator use?

This calculator uses the 2024 federal income tax brackets and standard deduction amounts as published by the IRS. The standard deductions are $14,600 for single filers, $29,200 for married filing jointly, $14,600 for married filing separately, and $21,900 for head of household.

Does this include Social Security and Medicare taxes?

No. This calculator covers only federal income tax. FICA taxes (6.2% Social Security up to the wage base and 1.45% Medicare) are separate and not included here.

What is a marginal tax rate vs. an effective tax rate?

Your marginal rate is the rate applied to the last dollar of your taxable income — the highest bracket you reach. Your effective rate is the average rate across all your income, calculated as total tax divided by taxable income. The effective rate is always lower than the marginal rate due to the progressive bracket structure.

Does this calculator include state income taxes?

No. Only federal income tax is calculated. State income tax varies widely by state and would require a separate calculation.

What is the standard deduction for 2024?

For tax year 2024, the standard deduction is $14,600 for single filers and married filing separately, $29,200 for married filing jointly and qualifying surviving spouses, and $21,900 for head of household.

How accurate is this estimate?

This tool provides a close estimate for most W-2 wage earners using the standard deduction. It does not account for tax credits (child tax credit, earned income credit, etc.), the Alternative Minimum Tax, self-employment tax, passive income rules, or other complex situations. For a precise return, consult a tax professional or use IRS Free File.

USA Income Tax Calculator

Name: USA Income Tax Calculator
Availability: InStock
Author: Nham Vu

Enter your gross income, filing status, and deductions to instantly estimate your 2024 US federal income tax and effective tax rate.

Your Income Details

Filing Status

Gross Annual Income

Deduction Type

Standard Itemized

Standard Deduction (2024)

$14,600

Above-the-Line Adjustments (IRA, student loan, etc.)

Taxable Income

Federal Tax

Marginal Rate

Effective Rate

Income Breakdown

Gross Income $0

Adjustments - $0

Adjusted Gross Income $0

Deduction Used - $0

Taxable Income $0

Tax Bracket Breakdown

Enter your income and click Calculate Tax to see the breakdown.

How Your Income Is Allocated

Enter your income and click Calculate Tax to see the allocation.

Summary

Enter your gross income, filing status, and deductions to instantly estimate your 2024 US federal income tax and effective tax rate.

How it works

Select your filing status: Single, Married Filing Jointly, Married Filing Separately, or Head of Household.
Enter your gross annual income.
Choose the standard deduction (auto-filled for 2024) or enter a custom itemized deduction amount.
Optionally enter additional above-the-line adjustments such as IRA contributions or student loan interest.
The calculator subtracts deductions from gross income to get taxable income, then applies the 2024 progressive brackets.
Your estimated tax, marginal rate, effective rate, and per-bracket breakdown are displayed instantly.

Use cases

Estimate how much federal income tax you will owe before filing.
Compare tax liability across different filing statuses.
Understand which tax bracket your income falls into.
Plan year-end income adjustments to stay within a lower bracket.
Evaluate the benefit of contributing more to a pre-tax retirement account.
Check whether the standard deduction or itemizing saves more tax.
Model a raise, bonus, or freelance income to see the extra tax cost.
Verify your paycheck withholding is approximately correct.

Frequently Asked Questions

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Last updated: 2026-05-23 · Reviewed by Nham Vu