Invoice requirements in KR
What every invoice in KR should contain, and how VAT applies. This is a practical checklist — always confirm specifics with National Tax Service.
Mandatory fields
- A unique, sequential invoice number.
- Invoice issue date and (if applicable) due date.
- Your business name, address, and VAT number (if registered).
- Your client's name and address.
- A clear line-item breakdown: description, quantity, unit price.
- The VAT rate (10%) and the VAT amount charged.
- The total amount payable in KRW.
Frequently asked questions
What makes an invoice valid in KR?
A valid invoice in KR needs a unique number, both parties' details, a dated line-item list, and the correct VAT breakdown. National Tax Service publishes the official requirements.
Can I issue an invoice without a VAT number?
Yes, if you are below the VAT registration threshold. You simply do not charge VAT. Registered businesses must show their number.
This checklist is for reference only. Confirm specifics with National Tax Service. InvoiceFormly is a tool, not tax or legal advice. National Tax Service