Errors in filed VAT returns are not exceptional — they are an expected reality in any business with complex transactions. What separates a managed compliance position from a penalty exposure is the response: how quickly the error is identified, which correction route applies, and whether the process is executed correctly. The April 2025 amendments to Article 63 refined each of these routes in ways that change the practical steps required.
The Three Correction Routes
Article 63 of the Implementing Regulations establishes three distinct correction mechanisms. Which applies depends on whether the error produced an understatement or overstatement of tax, and — for understatements — whether the net difference falls above or below SAR 15,000.
| Error Type | Net Tax Difference | Correction Route | Deadline |
|---|---|---|---|
| Understatement (too little tax declared) | SAR 15,000 or more | Route 1 — notify ZATCA by correcting the prior return | 20 days from knowledge |
| Understatement (too little tax declared) | Below SAR 15,000 | Route 3 — fold into the next return | Next filed return after discovery |
| Overstatement (too much tax declared) | Any amount | Route 2 — adjust in any subsequent return | Within 5 years of the period end |
Route 1: Understated Tax Above SAR 15,000 — The 20-Day Obligation
Where a filed return has resulted in the net tax due being understated by SAR 15,000 or more, the taxable person must notify ZATCA within twenty (20) days of becoming aware of the error. Notification is made by correcting the previously submitted return.
The April 2025 amendment to Article 63(1) refined the language to focus on the net tax due — specifically, that the taxable person has reported an amount less than the net tax they were required to report. The correction is made to the previously submitted return, not through a new return for a different period.
The clock starts from the date of knowledge — not the date of the original error, and not the date of formal discovery through a ZATCA audit. If a business identifies the error internally during a review in March for a return filed in January, the 20-day clock starts in March. Knowledge can also be constructive: Article 63(1) specifies that the obligation applies where the person “becomes aware of such facts which should have led it to be aware of” the error. Wilful ignorance does not pause the clock.
What Constitutes an Understatement
An understatement of tax arises from: declaring too little output tax (missing supplies, wrong rates, missed reverse charge); claiming too much input tax (non-compliant invoices, excessive RCM input recovery, overclaimed proportional deduction); or a combination of both. The relevant figure is the net tax difference — output tax shortfall plus input tax overclaim — across all affected periods.
Route 3: The SAR 15,000 Threshold — And How 2025 Changed It
The exception in Article 63(3) allows an understated error with a net tax difference below SAR 15,000 to be corrected without the formal 20-day notification process. Instead, the correction is folded into the next return.
Before April 2025, the provision simply said the correction could be made in the “following tax return.” The April 2025 amendment added specificity: the correction must be incorporated into the net tax due in the return for the tax period during which the error was discovered.
A business filing quarterly discovers in September (Q3) that its Q2 return understated tax by SAR 8,000. Under the pre-2025 rule, it could fold this into the Q3 return — which was the “following” return. Under the 2025 amendment, the correction must appear in the Q3 return because that is the return for the period in which the error was discovered (Q3: July–September). The practical outcome is the same — the Q3 return — but the framing is now tied to the discovery period, not simply the next return filed.
The threshold applies to the net tax difference — the combination of output tax understatement and input tax overclaim across all affected periods. A business that finds separate errors in three different quarters, each below SAR 15,000 individually, must assess whether they aggregate to SAR 15,000 or more in total. The Regulations refer to the net tax difference resulting from the error — if multiple errors relate to a single understatement event, the aggregate matters.
Route 2: Overstated Tax — Correct in Any Subsequent Return
Where an error resulted in the taxable person declaring more net tax than required — too much output tax, too little input tax — the correction is more flexible. Article 63(2) permits the business to correct the error by incorporating the adjustment (as a deduction) into the net tax due in any subsequently filed return.
The April 2025 amendment to Article 63(4) clarified the limitation period: no correction relating to an error that resulted in a declaration of net tax due that exceeds what should have been declared may be made after five years from the end of the calendar year in which the relevant tax period falls.
This is an important clarification. The prior wording referred to corrections relating to a “refund request” — which was narrower and potentially ambiguous. The 2025 version correctly captures all overstatement corrections within the five-year window, regardless of whether they also involve a refund.
What a Correction Submission Must Contain
Article 63(5) sets out the minimum content for any correction submitted to ZATCA. A correction that does not contain all three elements is incomplete:
- The tax period or periods to which the returns being corrected relate
- The amount of output tax and input tax being corrected in respect of each period
- An explanation of the reason for the error or incorrect information in the return
The reason explanation is not a formality. A correction that simply states “miscalculation” without identifying the type of error, the transactions involved, and the basis of the correction is unlikely to be accepted without follow-up queries from ZATCA. The explanation should be specific, factual, and cross-referenced to the relevant invoices or transaction records where applicable.
“During Q2 2025, the reverse charge mechanism was not applied to three invoices received from a non-resident software provider (Supplier X). The total value of those invoices was SAR 280,000. The resulting output tax understatement is SAR 42,000 (15% of SAR 280,000). The corresponding input tax of SAR 42,000 should have been simultaneously claimed. The net additional tax due is zero, but the output tax disclosure in the Q2 2025 return was understated by SAR 42,000.”
- Understated tax of SAR 15,000 or more must be notified to ZATCA within 20 days by correcting the original return. This is a mandatory obligation from the moment of knowledge.
- Understated tax below SAR 15,000 may be folded into the return for the period in which the error was discovered — not any subsequent return, as clarified in the April 2025 amendment.
- Overstated tax may be corrected in any subsequently filed return, within five years of the end of the calendar year in which the relevant period falls.
- The SAR 15,000 threshold applies to the net tax difference across all affected periods — individual and aggregate impacts both matter.
- The 20-day clock starts from the date of knowledge — including constructive knowledge where facts should have led to awareness of the error.
- Every correction must identify the periods affected, the output tax and input tax amounts corrected for each, and an explanation of the error. Incomplete corrections will generate ZATCA queries.
- Voluntary correction before ZATCA identifies the error through audit is treated more favourably under the penalty framework. Early action matters.
This article is for informational purposes only and does not constitute legal or tax advice. Regulations referenced are based on ZATCA publications current at time of writing. Always verify with a qualified Saudi tax professional for your specific circumstances.