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🧾 US Federal Income Tax Calculator
Estimate your US federal income tax based on 2024 brackets. Choose filing status, enter income and adjustments, see marginal bracket and effective rate. State tax and FICA not included.
Examples
Income $80k, single, $14,600 standard deductionTaxable $65,400 · Tax ~$9,500 · Effective rate ~12%Income $200k, MFJ, $29,200 standard deductionTaxable $170,800 · Tax ~$26,300 · Effective rate ~13%Frequently asked questions
What is the difference between marginal and effective rate?
Marginal rate is the tax on your last dollar (the highest bracket you reach). Effective rate is total tax / total income (always lower than marginal because lower brackets pay less).
Does this include state tax?
No. State tax varies enormously (0% in TX/FL/WA; ~13% in CA top bracket). Add your state separately.
What about FICA (Social Security + Medicare)?
Not included here. FICA is 7.65% on the first $168,600 (2024), then 1.45% above. Self-employed pay double.
Itemize vs standard deduction?
Take whichever is larger. Standard deduction (2024): $14,600 single / $29,200 MFJ. Itemize if your mortgage interest + state taxes (capped $10k) + charity exceed those.
About this tool
US Federal Income Tax Calculator runs entirely in your browser using standard Web APIs. No data is sent to any server. The source for this tool is in our public GitHub repository.
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Why this tool
vs typical free web-tool sites
| 1vw | Typical free site | |
|---|---|---|
| Price | Free | Free |
| Signup required | No | Often (for premium features) |
| Ads inside the tool | No | Yes (banner + video) |
| Data sent to server | No (browser-only) | Yes (inputs analyzed for ads) |
| Total tools | 96 | Often <20 or scattered across sites |
| Bookmarkable URL per tool | Yes | Mixed |
| Loads in under 1s | Yes (static) | Often slow (ad tracking) |
| Multilingual | EN / ES / PT / FR / DE | Usually EN only |
| Open source | Yes | No |