Key Requirements for Thai-Compliant Invoices
To ensure your invoices comply with Thai regulations, it's critical to include specific details that meet legal and tax standards. Every invoice issued in Thailand must prominently display the Tax ID Number (TIN), which is a unique 13-digit identification number for both the issuer and the recipient if they are registered entities. The invoice must clearly describe the nature of goods or services provided, including quantity, unit price, and total amount, ensuring clarity for tax assessment. For certain imported services, a reverse charge note is necessary, indicating that the recipient is responsible for accounting for the VAT. Additionally, invoices should adhere to formatting requirements, typically including the invoice date, a unique sequential invoice number, and the currency (Thai Baht, THB).