米国自営業税計算

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 net profit from self-employment. The calculator applies 15.3 percent to 92.35 percent of your profit, with the Social Security part capped at the wage base, and shows the half you can deduct and a quarterly amount to set aside. Figures are for the 2026 tax year and can change. A guide only, check irs.gov or a tax professional.

How it works

Self-employed people pay both the employee and employer halves of Social Security (12.4 percent) and Medicare (2.9 percent). The tax applies to 92.35 percent of net earnings. Social Security stops at the yearly wage base, $184,500 for 2026, while Medicare has no cap.

Example

On $80,000 profit the base is $73,880, so the tax is about $11,300. Half of it, around $5,650, is deductible from your income.

Tips

Pay quarterly estimates to avoid penalties, on 15 April, 15 June, 15 September and 15 January. Self-employment tax is on top of income tax.

計算例

With the boxes at their starting values (Net profit from self-employment ($): 80000), the tool shows: Earnings subject to the tax ($): 73,880; Social Security tax ($): 9,161; Medicare tax ($): 2,143; Deductible half ($): 5,652; Set aside per quarter for this tax ($): 2,826; Self-employment tax ($): 11,304. 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。