What is a tax invoice?
A tax invoice is the document issued by a VAT-registered supplier when it makes a taxable supply of goods or services. It is usually issued in business-to-business transactions and contains all the elements required by the VAT Implementing Regulations. It differs from the simplified tax invoice, which is usually issued to consumers and contains fewer elements. Under e-invoicing, the tax invoice and its related credit and debit notes are treated the same way in terms of generation and storage, and in terms of clearance in the integration phase.
When must it be issued?
A tax invoice must be issued no later than the fifteenth day of the month following the month in which the supply took place. If you supplied goods on 10 March, the deadline for issuing their invoice is 15 April. In practice, though, it is better to issue it at or close to the time of supply, because delays complicate reconciliation and slow down collection, and because VAT may become due earlier than the invoice date, for example when an advance payment is received. In the integration phase, the tax invoice also needs to be cleared by ZATCA before being shared with the buyer.
Key requirements of a tax invoice
A tax invoice includes mandatory elements, most notably: • A statement that it is a tax invoice. • The supplier's name, address and VAT registration number. • The buyer's name, address and VAT registration number, if registered. • A unique sequential invoice number. • The issue date, and the supply date if different. • A description of the goods or services, their quantities and unit prices. • Any discounts. • The taxable amount, the VAT rate, and the VAT amount in Saudi riyals. • The total including VAT. The invoice must also be issued in Arabic, and another language may be added alongside it. In phase two, the QR code and technical elements such as the unique identifier and the cryptographic stamp are added.
Why does it matter to the buyer?
For a VAT-registered buyer, a correct tax invoice is the basis of its right to deduct the input tax it paid. If the invoice is incomplete or incorrect, that right may be at risk on review. That is why many large customers and organisations now check invoices before accepting them, and reject invoices missing the VAT number or address, or that have not been cleared by ZATCA in phase two. A supplier that issues accurate invoices the first time saves its customer and itself rounds of corrections and delayed payments.
Why does it matter to the seller?
For the seller, the tax invoice is the legal record of output tax and the basis on which the VAT return is built. It must be kept for at least six years from the end of the relevant tax period and made available to ZATCA on request. Inaccurate invoices cause the seller: • Differences between the VAT return and the records on review. • Delayed collection because customers reject invoices. • An administrative burden of issuing correction notes. • Exposure to violations if the invoice does not meet regulatory requirements.
Correcting a tax invoice
A tax invoice is not edited or deleted after it is issued. If something requires its value to change, such as a partial return, a later discount, or a pricing error, you issue: • A credit note when the value decreases. • A debit note when it increases. The note must reference the original invoice number and state the reason for issuing it, and it takes the same type as the original invoice. If the error is fundamental, for example in the buyer's details, the safest approach is a credit note for the full value followed by a new, correct invoice.
The tax invoice is a management tool, not just an obligation
When invoices come from an integrated system and organised data, they turn from a compliance burden into a source of information for management: • Accurate sales reports by customer, item and branch. • Clearer tracking of receivables ageing and collection. • Faster reconciliation between sales, bank accounts and the VAT return. • Greater confidence from large customers and organisations that require compliance from their suppliers.
Frequently asked questions
Can a tax invoice be issued in English only? No. It must be issued in Arabic, and another language may be added alongside it, with the Arabic text being the reference. Can the invoice be issued in a currency other than the riyal? Amounts may be shown in another currency, but the VAT amount must be shown in Saudi riyals. What if the customer is not VAT-registered? They are usually issued a simplified tax invoice. If a tax invoice is issued to them, their VAT number is not required because they do not have one. How long must invoices be kept? At least six years from the end of the relevant tax period, with longer periods for certain cases such as records relating to real estate.
Conclusion
A correct tax invoice protects your customer's right to deduct, protects your business on review, and speeds up collection. Investing in issuing it accurately the first time costs far less than correcting it later. At Shams Solutions, we help businesses prepare their accounting and ERP systems for e-invoicing, from the initial assessment and data cleanup to integration with the FATOORA platform, go-live and ongoing follow-up. Contact us to review your business's setup and agree on the right next steps.