🧾VAT Calculator
Auto-calculate supply price (공급가액), VAT, and total at Korea's standard 10% rate. Also reverse-calculates supply price from a VAT-inclusive total. Useful for invoices, tax receipts, audit reviews, VAT filing, and unit-price setting.
How to use
- 1Pick a mode (enter supply price / enter total).
- 2Type a value to see the rest computed.
FAQ
Tax-exempt businesses?+
Tax-exempt businesses don't charge VAT. This is for standard taxable businesses (10% VAT).
Relationship between supply, VAT, and total?+
Total = supply + VAT. VAT = supply × 10%. E.g., supply ₩100,000 → VAT ₩10,000 → total ₩110,000.
Find supply price from VAT-inclusive total?+
Total ÷ 1.1 = supply. E.g., ₩110,000 ÷ 1.1 = ₩100,000. Use 'enter total' mode.
Other rates than 10%?+
Standard Korea VAT is 10%. 0% (zero-rated, e.g., exports) and tax-exempt businesses are separate. Other countries' VAT (EU 20%, Japan 10%) work if you can change the rate.
Is VAT included in card payments?+
Receipts from registered businesses usually include VAT in the total. Check whether the receipt itemizes '공급가액' and '세액'.
Mixed taxable and exempt items?+
Compute separately — agricultural goods, education, and medical items are 0%; general goods 10%.