Method and assumptions
Add 10% Korean VAT to a supply amount or split a tax-inclusive total into supply value and VAT. Quantity and won-rounding options are included, but this is not a tax-return calculator for simplified businesses.
Korea VAT Calculator
Split or add Korean 10% VAT for quotes and invoices.
Reviewed: 2026-07-21
How to use it
- Choose tax-exclusive or tax-inclusive input.
- Enter price, quantity, and the won-rounding method.
- Copy the supply value, VAT, and final total.
When it helps
- Adding Korean VAT to a quote
- Splitting an invoice total
- Checking totals for multiple items
How to verify the result
Check input units and reference dates first. For an important decision, compare the result with an official source or original document. A rounded display can differ slightly from the underlying value.
Official references
Frequently asked questions
How is an inclusive amount split?
For a standard 10% taxable transaction, divide the total by 1.1 for supply value and treat the remainder as VAT.
Can rounding create a one-won difference?
Yes. Item-level versus total-level calculation and rounding rules can produce a small difference.
Does every Korean transaction use 10%?
No. Zero-rated, exempt, and simplified-tax transactions can be treated differently.