VAT Calculator

Choose whether you're entering a VAT-exclusive amount (supply price) or a VAT-inclusive amount (total price), enter the amount and VAT rate, and instantly calculate the supply price, VAT amount, and total price.

Calculation mode

Korea's statutory VAT rate has been a flat 10% ever since the VAT Act took effect in 1977. This field is editable rather than hard-coded, so you can also use it for other countries' VAT/consumption tax rates or any other percentage-based rate.

Enter the details above to calculate the result.

About Korean value-added tax (VAT)

Korea's value-added tax (부가가치세) is a standard 10% consumption tax applied to most goods and services, and prices can be quoted either "VAT exclusive" (the supply price before tax) or "VAT inclusive" (the total amount including tax) — knowing which figure you're starting from determines which direction the calculation needs to go. This tool converts between supply price, VAT amount, and total price in either direction.

How the calculation works

Starting from a VAT-exclusive supply price, VAT amount = supply price × tax rate, and total price = supply price + VAT amount. Starting from a VAT-inclusive total price instead, the calculation must first back out the tax rate rather than simply multiplying: supply price = total price ÷ (1 + tax rate), since the entered amount already has tax baked in — this reverse calculation is a common point of confusion, since naively multiplying the total by the tax rate would overstate the actual VAT amount.

Frequently asked questions

Why can't I just multiply the VAT-inclusive total by 10% to find the tax amount?
Multiplying the tax-inclusive total by the rate overstates the actual tax, because that total already contains the tax within it — you need to first extract the pre-tax supply price by dividing by (1 + tax rate), then calculate 10% of that smaller supply price to get the correct VAT amount.
Is the tax rate always exactly 10%?
10% is Korea's standard VAT rate for most transactions, but this tool lets you adjust the rate manually since certain goods/services, export transactions, or other special cases can be zero-rated or exempt — always confirm the applicable rate for your specific transaction type rather than assuming 10% universally applies.
Why do businesses sometimes advertise prices as VAT-exclusive?
Business-to-business transactions and some B2C listings quote VAT-exclusive prices because the supply price is the more directly relevant figure for accounting and tax-credit purposes on the buyer's side, while consumer-facing retail prices are almost always shown VAT-inclusive since that's the actual amount the shopper pays.