米国連邦所得税計算

使い方

1. 1
   項目を入力

   数値を入力するか、必要なオプションを選びます。

2. 2
   結果を見る

   値を変えるとすぐに答えが更新されます。

3. 3
   活用する

   結果をコピーするか書き留めてください。何もどこにも送信されません。

About this tool

Enter your gross income and filing status. The calculator subtracts the standard deduction and applies the federal tax brackets to show your tax, marginal rate, effective rate and income after federal tax. Figures are for the 2026 tax year and can change. A guide only, check irs.gov or a tax professional.

How the brackets work

US income tax is progressive. Each rate applies only to the slice of income inside its bracket, so moving into a higher bracket does not tax all of your income at the higher rate. The 2026 standard deduction used here is $16,100 for single filers, $32,200 for married filing jointly and $24,150 for head of household.

Example

A single filer with $85,000 income has $68,900 of taxable income. The federal tax is about $9,000, an effective rate near 10.6 percent, even though the top slice is taxed at 22 percent.

Not included

State tax, FICA, credits such as the child tax credit, itemized deductions and the qualified business income deduction are not modelled.

計算例

With the boxes at their starting values (Gross income for the year ($): 85000; Filing status: Single), the tool shows: Standard deduction ($): 16,100; Taxable income ($): 68,900; Marginal rate: 22%; Effective rate: 11.6%; Income after federal tax ($): 75,130; Federal income tax ($): 9,870. Change any box to see your own numbers. The result updates as you type, and nothing leaves your browser.

最良の結果を得るためのヒント

結果を信頼する前にすべての項目を確認してください。数字がひとつ違うだけで答え全体が変わります。給与明細、請求書、証明書、契約書にある正確な数字を使い、計算した日付を控えておきましょう。税率、しきい値、ルールは随時変わるため、税金、手数料、法的な事柄については結果を概算とみなし、このページに記載された公式情報源で確認してください。シナリオは何度でも試せます。何も保存・送信されず、ページを再読み込みすると入力欄はクリアされます。