Pro-forma invoices: Can a pro-forma invoice be used to account for VAT?
Under VAT Act 1994, section 25 entitlement to input tax is conditional upon a supply of goods or services being received for business purposes and the supply being supported by a valid VAT invoice. Pro-forma or similar invoices are not, therefore, acceptable evidence.
If the issuer of a pro-forma invoice subsequently receives payment and/or makes a supply, a full VAT invoice must be issued within 30 days. The tax point will follow the normal rules.