Tax Invoice
A tax invoice is a mandatory document that needs to be issued by sellers of goods and services in order to submit VAT.

Failing in providing tax invoices in compliance with below described requirements may lead to the non-deductibility of expenses, resulting in adding back such expenses to the assessable income and increasing the company tax liability.

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A tax invoice must at least contain the following information:

  • The wording “Tax Invoice” in a prominent place.
  • The name, address, and tax identification number of the seller.
  • The name, address, and tax identification number of the customer.
  • The mention “Head Office” or “Branch” number for both the seller & customer.
  • The tax invoice issue date.
  • The tax invoice serial number.
  • The description, quantity, unit price and total value of goods or services.
  • The amount of VAT charged on goods or services.

A “regular” invoice is

issued to request the payment of goods and services; a tax invoice is then issued upon the delivery of goods or receipt of payment. The tax invoice date becomes the tax point for VAT purpose.

Invoices raised in foreign currencies shall show both currencies on the face of invoices and indicate the exchange rate used for conversion; the latter shall be aligned with rates published by the Bank of Thailand.