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If your business is registered for VAT in Saudi Arabia, the next hard date is 31 October 2026. The VAT return deadline Saudi Arabia filers are working towards covers two groups at once: monthly filers closing September, and quarterly filers closing the third quarter, July to September. The return and the payment are both due by that day.
This guide sets out a practical VAT filing checklist for Saudi Arabia, explains who files monthly and who files every three months, and shows what late filing costs. Everything here is taken from the Zakat, Tax and Customs Authority (ZATCA) rules, with the sources linked at each point.
What falls due on 31 October
The VAT Implementing Regulations are explicit. A tax return must be filed "no later than the last day in the month following the end of the Tax Period to which the Tax Return relates". The same cut-off applies to the money: payment of the tax due for a tax period "must be made at the latest by the last day of the month following the end of that Tax Period".
So for a monthly filer, the September 2026 period closes on 30 September and the return is due by 31 October. For a quarterly filer, the third quarter runs 1 July to 30 September, and that return is due on the same date. Filing on time but paying late still attracts a penalty, so treat the two as one deadline rather than two.
Monthly or quarterly: which tax period applies to you
Your filing frequency is not a choice you make each quarter. The VAT Implementing Regulations set it by the size of your taxable supplies: taxpayers whose annual value of taxable supplies exceeds 40,000,000 SAR during the previous twelve months must use a monthly tax period, and for all other taxpayers the standard tax period is three months.
A business below that level may apply to ZATCA to move to monthly filing, which some companies in a repayment position prefer. A business that has used monthly periods for two years may apply to move back to three months, provided its taxable supplies over the last twelve months are under the same 40,000,000 SAR figure. Either way the change takes effect from the start of the next tax period after approval, not immediately.
| Annual taxable supplies | Tax period | Period ending now | Due date |
|---|---|---|---|
| Above 40,000,000 SAR | Monthly | September 2026 | 31 October 2026 |
| 40,000,000 SAR or below | Three months | Q3 2026, July to September | 31 October 2026 |
The VAT filing checklist
Work through these steps in order. Most of the errors that turn into assessments later come from the first four, not from the portal itself.
- Confirm which tax period you are filing and that nothing from the previous period is still open.
- Close your sales ledger for the period and make sure every issued invoice carries 15% VAT on each line, in Saudi Riyals.
- Check that each tax invoice shows your VAT registration number, the customer details required for a standard invoice, and the correct supply date.
- Pull all credit and debit notes issued in the period and match them to the original invoices.
- Separate your zero-rated supplies, exempt supplies and exports, and keep the evidence for each.
- Collect purchase invoices for input tax, and drop anything you do not hold a valid tax invoice for.
- Remove blocked input tax, such as entertainment and most motor vehicle costs used privately.
- Add reverse charge entries for services bought from non-resident suppliers.
- Reconcile the output tax total to your accounting reports before you type a single figure into the portal.
- File through the ZATCA portal, then pay by SADAD using the bill number generated with the return.
Reconcile your invoices before you file
The fastest way to file wrongly is to build the return from a spreadsheet that nobody has tied back to the invoices actually issued. Start from the invoice register, not from the bank. Your reported output tax should equal the VAT on every tax invoice dated inside the period, adjusted for credit notes.
Three reconciliations are worth doing every period. First, invoice register against the sales figure in your accounting and VAT software, so that no invoice is missing. Second, output tax against 15% of your standard-rated supplies, which catches lines entered at the wrong rate. Third, input tax against your supplier invoice file, so you only claim what you can evidence. If a number does not tie out, fix the record rather than the return.
What late filing and late payment cost
ZATCA publishes the penalties for VAT violations, and they are not small. Failure to submit the tax return on time carries a penalty of "5% - 25% of the value of the Tax that would have had to be declared". Failure to pay the tax due carries "5% of the value of the unpaid Tax for each month or part thereof the Tax has not been paid", which compounds the longer the balance sits.
| Violation | Penalty |
|---|---|
| Failure to submit the tax return | 5% to 25% of the tax that should have been declared |
| Failure to pay the tax due | 5% of the unpaid tax for each month or part month |
The full list is on the ZATCA VAT penalties page. If you find an error in a return you already filed, correct it through an amended return rather than leaving it; the exposure grows with time.
Common mistakes in a third quarter return
Timing errors come first. An invoice dated 29 September belongs in the third quarter even if the customer pays in November, because the standard rule is invoice based, not cash based. Businesses that moved to the cash accounting basis are the exception, and that basis has to be applied for.
Second, missing credit notes. A discount agreed in October on a September invoice is an adjustment, and it belongs in the period in which the event occurred or when the note was issued, depending on direction. Third, claiming input tax on a supplier invoice that is not a valid tax invoice. Fourth, forgetting the reverse charge on imported software and consultancy services.
A fifth one is structural: businesses still issuing invoices by hand that then cannot be matched to anything. If you are already preparing for ZATCA e-invoicing, the same discipline solves both problems, and our guide to ZATCA e-invoicing phases and Fatoora explains how the invoice itself has to be structured.
Getting the numbers ready with Daftarix
Daftarix is business software for companies in Saudi Arabia, and the accounting side is built around the documents a VAT return is made of. Quotations become invoices in one step. Tax invoices are issued in Saudi Riyals with 15% VAT worked out on every line, in Arabic or English, so the rate is applied consistently rather than typed by hand.
Payments are recorded in full or in part, so you can see what each customer still owes without a side spreadsheet. Sales, revenue and outstanding balances come out as simple reports, and every quotation, invoice and payment sits on the customer record your sales team already uses. For Phase 2, Daftarix helps you issue e-invoices that follow the ZATCA format and connect to Fatoora.
If you want to see how your October filing would look with the invoice register doing the work, book a demo or ask the team for a quote.
Frequently asked questions
When is the VAT return due in Saudi Arabia?
By the last day of the month following the end of your tax period. For the September 2026 month and for the third quarter of 2026, that is 31 October 2026, for both the return and the payment.
Do I file monthly or every three months?
Monthly if your annual taxable supplies exceeded 40,000,000 SAR over the previous twelve months. Otherwise the standard tax period is three months. You can apply to ZATCA to change frequency, and the change starts from the next tax period after approval.
What happens if I file but cannot pay?
File anyway. The late filing penalty of 5% to 25% applies to the return, and the late payment penalty of 5% per month or part month applies to the unpaid balance. Filing on time removes the first of those two.
Can I correct a return after filing it?
Yes, through an amended return. Because the late payment penalty accrues monthly, it is cheaper to correct an understated return early than to wait for ZATCA to raise an assessment.
Does e-invoicing change the filing deadline?
No. E-invoicing changes how invoices are issued and reported, not when the VAT return is due. The deadline stays the last day of the month after the tax period ends.
