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Free US Tax Calculators — Know What You Owe Before You File

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Uses 2025 IRS tax brackets, standard deductions, and FICA rates. Estimates only — verify with a tax professional before filing.

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10 Free Federal Income Tax Calculators

All results are estimates for informational purposes only and do not constitute financial or tax advice. Always verify with a qualified tax professional before filing.

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How it works

How the Free Tax Calculator Works

No wizard. No account. No data sent anywhere. Just your number — instantly.

1. Pick your tool

Choose from 10 tax calculators — income, self-employed, capital gains, crypto, bonus, and more.

2. Enter your numbers

Type your income, filing status, and deductions. Results update instantly — no submit button needed.

3. See the breakdown

Get your tax owed, effective rate, and bracket-by-bracket detail. Nothing stored, nothing shared.

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FAQ

Tax Calculator FAQ — 2025 Tax Questions Answered

Straight answers to the tax questions people search for most.

A single filer earning $75,000 in 2025 owes approximately $11,289 in federal income tax after the $15,000 standard deduction — an effective rate of about 15.1%. The marginal rate on the last dollar is 22%. Use the Income Tax Calculator above for your exact figure.
The self-employment tax rate is 15.3% — 12.4% Social Security and 2.9% Medicare — on net SE income up to $176,100 in 2025. Above that only the 2.9% Medicare portion applies. You can deduct half of your SE tax from gross income, lowering your income tax bill.
Long-term gains (assets held over 1 year) are taxed at 0%, 15%, or 20% depending on income. Single filers pay 0% under $48,350, 15% up to $533,400, and 20% above that. Short-term gains are taxed as ordinary income at your marginal rate.
Most employers withhold at the flat 22% supplemental rate plus 6.2% Social Security and 1.45% Medicare — about 29.65% total. High earners may also owe 0.9% Additional Medicare Tax. Use the Bonus After-Tax Calculator to see your exact net amount.
Estimate total annual tax, subtract withholding, divide by 4. To avoid underpayment penalties, pay the lesser of 90% of current-year tax or 100% of prior-year tax (110% if prior-year AGI exceeded $150,000). Deadlines: April 15, June 16, September 15, January 15.
Yes. The IRS treats crypto as property. Short-term gains (held 1 year or less) are taxed as ordinary income; long-term gains qualify for the 0/15/20% preferential rates. The wash-sale rule does not currently apply to crypto — unlike stocks.
The 2025 standard deduction is $15,000 (single) and $30,000 (married filing jointly). Itemize only if your mortgage interest, state taxes (capped $10,000), charitable gifts, and qualifying medical expenses exceed those amounts. About 90% of filers now take the standard deduction.
Single filers in 2025: 10% on $0-$11,925; 12% on $11,926-$48,475; 22% on $48,476-$103,350; 24% on $103,351-$197,300; 32% on $197,301-$250,525; 35% on $250,526-$626,350; 37% above $626,350. Only income within each band is taxed at that rate.
Key strategies include maximizing 401(k) contributions ($23,500 limit in 2025), contributing to an HSA ($4,300 single / $8,550 family), harvesting capital losses to offset gains, bunching charitable donations, and contributing to a traditional IRA. Self-employed individuals can also deduct half their SE tax.
The W-4 tells your employer how much federal tax to withhold. Step 3 is for Child Tax Credits ($2,000 per qualifying child). Step 4(c) is extra withholding per pay period. Use the W-4 Withholding Calculator to find your optimal entries and hit your target refund.
Generally no. If gross income is below $15,000 (single, 2025), taxable income is zero and you owe no federal income tax. You may still owe SE tax on net self-employment income over $400. If you had withholding, file to claim a refund.
A W-2 is issued by employers who withhold federal and state taxes directly from your paycheck — you don't owe self-employment tax. A 1099-NEC is issued for freelance or contract work where no tax is withheld — you're responsible for paying SE tax (15.3%) plus income tax yourself. Use the Self-Employed Tax Calculator above to see your full combined tax burden as a 1099 worker.
A single filer earning $50,000 in 2025 would owe approximately $3,491 in federal income tax after the $15,000 standard deduction — an effective rate of about 7.0%. The marginal rate on the last dollar is 12% (taxable income of $35,000 falls in the 12% bracket). Use the Income Tax Calculator above with your exact filing status and any pre-tax deductions for your precise figure.
The federal filing deadline for 2024 tax returns is April 15, 2025. If you file for an extension, you have until October 15, 2025 — but any tax owed is still due April 15 to avoid penalties and interest. If you're self-employed, quarterly estimated tax payments are due April 15, June 16, September 15, and January 15, 2026. Use the Quarterly Estimated Tax Calculator above for your payment amounts.
The Child Tax Credit is worth up to $2,000 per qualifying child under age 17 in 2025. It phases out for single filers above $200,000 and married joint filers above $400,000. Up to $1,700 per child may be refundable as the Additional Child Tax Credit even if you owe little or no tax. The Income Tax Calculator above automatically applies the CTC when you enter your number of dependents.
You generally need to pay quarterly estimated taxes if you expect to owe at least $1,000 in federal tax after subtracting withholding and credits, and your withholding will cover less than 90% of this year's tax or 100% of last year's. This applies to most self-employed people, freelancers, investors with capital gains, and anyone with significant untaxed income. Use the Quarterly Estimated Tax Calculator above for your exact payment amounts and all four IRS due dates.
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Looking for the exact numbers?

The full 2025 federal tax bracket table is just below — all 4 filing statuses, standard deductions, and capital gains rates.

See the full table ↓
Reference Data · Tax Year 2025

2025 Federal Tax Brackets by Filing Status

IRS marginal (step-by-step) tax rates for 2025. Only income within each band is taxed at that rate — not your entire salary. Enter your income below to highlight your bracket.

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Enter income to highlight your bracket

💡 Click Open Income Tax Calculator in the CTA below to get a bracket-by-bracket breakdown with your exact deductions and credits applied.

Rate Single Calculate
10%$0 – $11,925
12%$11,926 – $48,475
22%$48,476 – $103,350
24%$103,351 – $197,300
32%$197,301 – $250,525
35%$250,526 – $626,350
37%Over $626,350
Source: IRS Rev. Proc. 2024-40 · Tax year 2025 (returns filed 2026) Marginal rates apply to each income band only — not to total income Standard deductions: $15,000 single · $30,000 MFJ · $22,500 HOH

Standard Deductions (2025)

  • Single / MFS: $15,000
  • Married Filing Jointly: $30,000
  • Head of Household: $22,500
  • Age 65+ add: $1,600–$2,000

Long-Term Capital Gains (2025)

  • 0% rate (Single): Up to $48,350
  • 15% rate (Single): $48,351–$533,400
  • 20% rate (Single): Over $533,400
  • Short-term: Ordinary income rates

FICA & SE Tax (2025)

  • SS wage base: $176,100
  • Employee SS rate: 6.2%
  • Employee Medicare: 1.45%
  • SE tax rate: 15.3% (both halves)

See exactly which bracket your income lands in

Enter your income above to highlight your bracket row, then open the Income Tax Calculator for the full breakdown with deductions and credits applied.

Free Tax Guides

Plain-English explanations of every major federal tax topic — paired with the calculators above.

🧾

How to Estimate Your Federal Income Tax

Calculate your real tax bill before April — income, deductions, credits, and bracket breakdown.

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Tax Brackets Explained: How Marginal Rates Work

Why a raise never leaves you with less — the bucket system demystified with real numbers.

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Self-Employment Tax: What Freelancers Actually Owe

The 15.3% SE tax, the half-deduction offset, and how business expenses reduce both bills.

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Quarterly Estimated Taxes: Who Owes, When, and How Much

The four 2025 deadlines, the safe harbor method, and how to avoid underpayment penalties.

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Short-Term vs Long-Term Capital Gains Tax Rates

One day's difference in holding period can cut your tax bill in half. Here's the math.

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How Your Bonus Is Taxed and Why Withholding Looks High

The flat 22% withholding rate explained — and what you actually owe vs what was taken.

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How to Fill Out Your W-4 to Fix Your Withholding

Every step of the 2020+ form — what each section does and what to enter for your situation.

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Crypto Tax: Taxable Events and How to Calculate What You Owe

Every transaction type that triggers a bill — including crypto-to-crypto trades and staking rewards.

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Standard Deduction vs Itemizing: Which Saves You More

The exact comparison — SALT, mortgage interest, charitable giving — and the bunching strategy.

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Why You Got a Tax Refund — and Whether It's Actually Good

What a refund really means, what it costs you, and how to decide if yours is working for you.

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State Income Tax Rates: Which States Take the Most and Least

No-tax states, flat-rate states, the 13.3% outlier — and what moving actually saves you.

 🌍

VAT for US Freelancers: When It Applies and What to Do

Reverse charge, B2B vs B2C, and exactly what to write on your invoice to EU clients.
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