Easily calculate supply price, VAT amount, and total amount. Supports both forward and reverse calculations based on Korea's fixed VAT rate of 10%.
Choose one of three modes based on the value you already know. Select the first mode if you know the supply price, the second if you know the total amount, and the third if you only know the VAT amount.
Enter the amount corresponding to the selected mode. Only numbers are required; commas are handled automatically. Decimal amounts are also accepted.
Click the 'Calculate' button to see instant results. Supply price, VAT, and total amount are each calculated and displayed in Korean won format with commas.
Check the supply price, VAT, and total amount in the result section. Each item is clearly separated, making it easy to use directly for tax invoice preparation or expense processing.
Click 'Reset' to clear all inputs and results before starting a new calculation.
A freelance designer providing services worth 1,000,000 KRW: Enter supply price 1,000,000 → VAT of 100,000 is calculated automatically, and the final billing amount is 1,100,000 KRW. This can be used directly when issuing a tax invoice.
If you're curious about the VAT on an 11,000 KRW purchase: Enter total amount 11,000 → supply price 10,000 and VAT 1,000 are calculated automatically. Supply price = total ÷ 1.1, rounded to the nearest integer.
When you receive a tax invoice showing only a VAT amount of 50,000 KRW: Enter VAT 50,000 → supply price 500,000 and total 550,000 are calculated. Since VAT rate is 10%, supply price = VAT × 10, total = VAT × 11.
A. Value Added Tax (VAT) is an indirect tax levied on the value added at each stage of a product or service transaction. In Korea, it was introduced in 1977 and is currently set at a flat rate of 10%. While the final consumer bears the tax, businesses collect and remit it to the government. Suppliers issue tax invoices, and VAT is reported and paid (or refunded) twice a year.
A. The supply price is the net price of goods or services before tax (pre-tax amount), while the total amount is the actual payment including 10% VAT (post-tax amount). For example, if the supply price is 100,000 KRW, the VAT is 10,000 KRW, and the total amount is 110,000 KRW. Tax invoices must clearly separate the supply price and VAT.
A. This calculator applies a 10% VAT rate for general taxpayers. Simplified taxpayers have different value-added ratios (15–40%) by business type and a different tax structure, so actual tax liabilities may differ from this calculator's results. For accurate calculations, consult a tax accountant or use the NTS (National Tax Service) Hometax system.
A. VAT-exempt items include basic necessities (unprocessed food like rice, vegetables, fruit), medical and healthcare services, certain educational services (schools, some academies), financial and insurance services, books, newspapers, magazines, and goods/services supplied to the government. No VAT is charged on these items, so this calculator does not apply.
A. General taxpayers are required to issue tax invoices when supplying goods or services. Failure to do so may result in additional taxes. Receipts may substitute for tax invoices when selling directly to consumers, but tax invoices are mandatory for business-to-business transactions. Electronic tax invoices can be issued through the NTS Hometax website.
A. When reverse-calculating supply price from total (total ÷ 1.1), decimals may occur. This calculator rounds the supply price using Math.round(), and VAT is calculated as total minus the rounded supply price. For actual tax invoice purposes, please consult a tax accountant or follow NTS guidelines for handling sub-won amounts.
Value Added Tax (VAT) is a tax levied on the value added during the transaction of goods and services. In Korea, a flat rate of 10% has applied since its introduction in 1977. Multiplying the supply price by 10% gives the VAT amount, and adding the supply price and VAT together gives the total (tax-inclusive) amount. The tax is borne by the final consumer but collected at each stage of the transaction and remitted to the government — making it an indirect tax.
Businesses collect VAT from customers on sales (output tax) and can deduct VAT paid on purchases (input tax). The net amount payable is calculated as output tax minus input tax. VAT returns are filed twice a year (January and July), with corporations required to file quarterly including estimated returns. Timely issuance and receipt of tax invoices is key to claiming input tax deductions, so using a VAT calculator to verify accurate supply prices and VAT amounts is an important business habit.
Freelancers and small business owners can reduce their VAT burden by diligently collecting and retaining purchase tax invoices. Tax invoices for business-related expenses (rent, communication, vehicle maintenance, supplies, etc.) can be used as input tax deductions to lower actual tax liability. Credit card sales slips and cash receipts can also serve as input tax credit documentation. Small businesses with annual revenue under 80 million KRW may register as simplified taxpayers to benefit from lower effective rates. Choosing the right taxpayer type based on your revenue scale is crucial for tax efficiency.