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Calkulon

金融・財務

Marginal Tax Rate 計算機

とは何か Marginal Tax Rate Calculator?

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Marginal tax rate is the percentage of tax on the last dollar earned. It's the rate applied to your next dollar of income and important for financial decisions about earning more.

Calkulon makes complex calculations simple — built for students and everyday problem-solvers.

公式

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f(x)Marginal rate = Tax bracket rate for the highest income bracket

方法 Marginal Tax Rate Calculator

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  1. 1Determine total taxable income
  2. 2Find the applicable tax bracket
  3. 3Marginal rate is the percentage for that bracket

解いた例

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例 1
入力:Income: $80k, Tax brackets: 22% for $40.5-$86.3k
結果:Marginal rate: 22%

Next $1 earned taxed at 22%

避けるべきよくある間違い

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  • !Confusing marginal with effective rate
  • !Ignoring bracket thresholds
📖難易度:中級
情報提供のみを目的としています。このツールは金融アドバイスではありません。投資や財務上の決定を行う前に、資格を持つファイナンシャルアドバイザーにご相談ください。
Deep Dive

Read the full guide on how to use this calculator effectively

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Formula-verified for precision
Reviewed October 2026
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