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税金

消費税、所得税などの税務計算。

4種類の計算機

税金

Taxes are rarely fun, but they can be understood. This category helps you add or remove VAT, estimate income tax and determine your effective tax rate.

The tools use clear formulas and show the intermediate steps, so you see exactly which part is tax and which part remains net.

Overview

The tax category includes a VAT calculator, an income-tax estimator, a reserve tool for the self-employed and an effective-tax-rate calculator.

How to use these calculators

  1. 1Pick the tax tool you need.
  2. 2Enter amounts and the correct rate.
  3. 3View the result including the breakdown.

Common mistakes

  • Calculating VAT on the wrong amount (incl. vs. excl.).
  • Choosing the wrong VAT rate (21% vs. 9%).
  • Forgetting to set aside money for tax as a freelancer.

Tips

  • As a freelancer, reserve a fixed percentage of each invoice for tax.
  • Keep the breakdown as documentation for your records.

よくある質問

How do I remove VAT?

Divide the amount including VAT by 1.21 (for 21%) to get the amount excluding VAT.

Are the tax results binding?

No, they are indications; the tax authority and your accountant remain authoritative.

Which VAT rate applies to my product?

Most goods fall under the high rate; some (food, books) under the low rate.

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