Fix It in the Next VAT Return, or File a Voluntary Disclosure?

• 26 October, 2026
• By the Exiloz tax team
• Tax Compliance

Last reviewed 26 October 2026 by the Exiloz tax team against the UAE legislation in force on that date. Tax law moves — confirm any figure against tax.gov.ae before you act on it.

The size of the error picks the route

Every business filing UAE VAT or other tax returns finds errors, and since 1 April 2026 rules sort them precisely. An error of AED 10,000 or less goes into the next return not yet due. A larger one needs a voluntary disclosure to the FTA within 20 business days. Voluntary disclosure preparation matters most once that 20-day clock runs.

This guide is about UAE tax returns that were already filed. A period never filed at all is a late return, which is a different problem with a different fix. The sections below cover the amended rule, the cost of each route and what counts as discovery. They also cover refund errors and how the same rule works for Corporate Tax.

When can a UAE VAT or tax error go in the next return?

When the tax difference is AED 10,000 or less and a return is still to fall due. Cabinet Decision No. 17 of 2026 amended Article 10 of the Tax Procedures Executive Regulation from 1 April 2026. The correction goes in that return.

If the return for the period in which the error was found is due earlier, the correction goes there instead. No voluntary disclosure is needed on this route, and no disclosure penalty arises. The rule applies across the federal taxes the FTA administers, including VAT and Corporate Tax.

Quick Answer

UAE tax errors of AED 10,000 or less go in the next return not yet due, under Cabinet Decision No. 17 of 2026. No separate voluntary disclosure penalty then applies.

When is a voluntary disclosure required?

When the tax difference exceeds AED 10,000. A disclosure is also needed for a smaller error when no return is left to file. In both cases, the deadline is 20 business days from discovering the error.

The clock runs from discovery, not from the end of the quarter or the next board meeting. Twenty business days is roughly four calendar weeks, and less around public holidays, because weekends and official holidays are excluded. Count the days on a calendar the day the error is found and fix the disclosure date.

Quick Answer

A UAE voluntary disclosure is required within 20 business days when a tax error exceeds AED 10,000. Smaller errors also need one when no future return remains to be filed.

What does each route cost?

Correcting an eligible error in the next return avoids the disclosure penalty entirely. A voluntary disclosure costs 1% of the tax difference monthly from the day after the original due date. Where the FTA has already notified an audit, a fixed 15% also applies.

Take an illustrative AED 46,000 input tax error in a return due 28 April 2026, found 10 November 2026. Disclosed in late November, about seven months count, so the penalty is AED 3,220. After an audit notification, AED 6,900 more would apply, roughly tripling the cost.

Quick Answer

Voluntary disclosures in the UAE cost 1% of the tax difference monthly from the original return's due date. Waiting for an FTA audit notification adds a fixed 15% on top.

What counts as discovering an error?

The point when the business knows, or should reasonably know, that a return was wrong. An accountant's email flagging the problem usually starts the clock. A vague suspicion does not, but the working papers should show when it became a finding.

Do not split one error into several small ones to stay under AED 10,000, because the FTA can add the pieces back together. If one cause produced AED 30,000 of tax across three returns, treat it as one disclosure. Date every finding and keep the evidence in one file.

Quick Answer

UAE tax errors are discovered when the business knows, or should reasonably know, of them. Treat all amounts from one cause as a single error, not as several smaller ones.

Does the rule cover refunds and Corporate Tax?

Yes, Article 10 also covers refunds that were claimed or received for too much. An inflated excess carried into a refund request follows the same AED 10,000 test. Refund-side errors are easy to miss because no tax payment was ever short.

Corporate Tax returns are annual, so the next return still to fall due may be many months away. That makes the disclosure route more common for Corporate Tax errors above the AED 10,000 line. Our guide to what voluntary disclosure assistance costs covers the preparation work involved in detail.

Quick Answer

The UAE AED 10,000 correction rule covers overstated refunds and applies to Corporate Tax as well as VAT. Annual Corporate Tax returns therefore make disclosures more common for larger errors.

Frequently Asked Questions

Main Takeaways

Since 1 April 2026, UAE tax errors of AED 10,000 or less go in the next return not yet due. Larger errors, or any error with no return left, need a voluntary disclosure within 20 business days. Disclosures cost 1% a month, plus a fixed 15% after an audit notice. Never split one error just to get under the line.

Decide the Route on the Day You Find the Error

The 2026 rule gives every error in a filed UAE tax return a clear route. Small errors go straight into the next return, while larger ones need a voluntary disclosure within 20 business days. The cost then depends mostly on timing, especially whether an FTA audit notice has already arrived. Refund errors and Corporate Tax errors follow exactly the same test.

Record the discovery date and cause in writing as soon as an error is found. Work out the full tax difference from that one cause across every affected tax return. Choose the route, set the deadline and fix the underlying cause in the accounting system. Exiloz can prepare the disclosure or the correction within the 20 business days allowed.

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