VAT Calculator

Convert between net and gross

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About this tool

Convert between supply price and total amount using the standard 10% VAT rate. If you know the tax-included total, this splits out the supply price and the VAT; if you know the tax-excluded supply price, it adds VAT to get the total.

How to use

  1. Choose "Subtract from total" (when you know the VAT-included amount) or "Add to supply price" (when you know the VAT-excluded amount).
  2. Enter the amount.
  3. The supply price, VAT (10%), and total amount are calculated together.
  4. When issuing a tax invoice, check the supply price and tax amount down to the won.

Frequently asked questions

How do I get the supply price from the total amount?
Divide the total by 1.1 to get the supply price, then subtract the supply price from the total to get the VAT. For example, a total of 110,000 KRW breaks down into a 100,000 KRW supply price and 10,000 KRW VAT.
If I only know the supply price, how do I get the total?
Multiply the supply price by 10% (0.1) to get the VAT, then add the supply price and VAT to get the total. A 100,000 KRW supply price plus 10,000 KRW VAT gives a 110,000 KRW total.
What VAT rate does this calculator use?
It uses the standard 10% rate. It does not account for tax-exempt items or simplified taxpayers, whose rates and methods differ โ€” check those cases separately.
Is the amount I enter sent to a server?
No. Everything is calculated in your browser and your input never leaves the page.

This is a simple calculation based on the standard 10% VAT rate. It may differ from actual tax invoice rules for exempt items, simplified taxpayers, or won-level rounding conventions โ€” confirm exact filings with National Tax Service materials or a tax professional.

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