VAT Calculator
Split 10% value-added tax out of a supply amount or a gross total automatically.
Reference only, based on the standard 10% rate. Follow a tax professional for accurate handling.
How is it calculated?
The default VAT rate is 10%. Choose 'By supply value' to add 10% to your amount and get VAT and the total. Choose 'By total' to divide a VAT-inclusive amount by 1.1 and recover the supply value and VAT. The rate is adjustable.
When to use it
- Writing a quote: enter the supply value to see VAT and the final billed amount instantly.
- Reversing a receipt: split a VAT-inclusive payment into supply value and VAT.
- Freelance settlement: pre-calculate supply value and tax before issuing a tax invoice.
Things to note
- This is a reference tool based on the standard 10% rate; it doesn't cover tax-exempt, zero-rated, or simplified taxation.
- Won-unit rounding varies by counterparty and accounting system, so the result may differ from a real tax invoice by about 1 won.
- For accurate tax handling, follow a tax accountant or the national tax authority's guidance.
The amounts you enter are calculated only in your browser and are never sent to or stored on a server. You can enter quote and settlement figures safely.
Read the Privacy Policy →Frequently asked questions
What is the VAT rate?
Korea's standard VAT rate is 10%. This calculator defaults to 10% but the rate is adjustable. It doesn't apply to tax-exempt or zero-rated items.
How do I extract just the VAT from a total?
Choose 'By total' and enter the VAT-inclusive amount; the total divided by 1.1 is the supply value and the remainder is VAT. For example, 11,000 gives a supply value of 10,000 and VAT of 1,000.
My result differs from the tax invoice by 1 won.
That's due to won-unit rounding differences. Depending on the counterparty or accounting software's rounding rules, it can differ by about 1 won, so confirm final figures against the actual issuing system.
Are the amounts I enter stored?
No. All calculation happens only in your browser and the amounts are never sent to or stored on a server.