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Free Federal Tax Tools

Free calculators built on official IRS rate schedules and tax code. No sign-up required.

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2025 Tax Bracket Calculator

Find your federal income tax bracket, marginal rate, and effective rate for 2025. Covers all four filing statuses with a full bracket-by-bracket breakdown.

  • check_circleAll 4 filing statuses
  • check_circleMarginal & effective rate
  • check_circleStandard or itemized deduction
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sourceIRS Rev. Proc. 2024-40

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2025 Tax Refund Estimator

Estimate whether you'll receive a refund or owe taxes. Enter your gross income, withholding, and credits to get an instant estimate.

  • check_circleIncome + withholding inputs
  • check_circleCredits applied
  • check_circleClear refund or balance-due result
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source2025 IRS Tax Rate Schedules

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IRS Penalty Calculator

Estimate failure-to-file and failure-to-pay penalties under IRC § 6651, plus underpayment interest. Know what you owe before you contact the IRS.

  • check_circleFailure-to-file penalty
  • check_circleFailure-to-pay penalty
  • check_circleAccrued interest estimate
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sourceIRC § 6651 · IRS underpayment rate

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IRS-Sourced Data

All tax rates and thresholds are pulled directly from IRS publications and Revenue Procedures.

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No Account Required

All tools are free to use with no sign-up, no data stored, and no tracking of your inputs.

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Estimates Only

These tools provide estimates for educational purposes. Always consult a licensed CPA or Enrolled Agent for advice specific to your situation.