How you correct a VAT error in the UAE depends on two things: the size of the underpaid tax and when the FTA's involvement starts. If the underpaid VAT is AED 10,000 or less, you can correct it in the VAT return for the period in which you discovered the error. If it is more than AED 10,000, you must submit a voluntary disclosure through EmaraTax within 20 business days of becoming aware of the error. This guide covers both routes, the deadlines, and the penalty exposure of each, as the rules stand in September 2026.
Which correction route applies to you
| Your situation | Correct route | Deadline |
|---|---|---|
| Underpaid tax ≤ AED 10,000 and you can correct it in the return for the period of discovery | Adjust the figures in the next VAT return | That return's normal 28-day deadline |
| Underpaid tax > AED 10,000 | Voluntary disclosure in EmaraTax | 20 business days from becoming aware of the error |
| Overpaid tax or excess recoverable input tax | Voluntary disclosure or refund application, as applicable | Before the FTA notifies a tax audit |
Source: FTA Voluntary Disclosure User Guide and Federal Decree-Law No. 28 of 2022 on Tax Procedures (Article 10 governs error correction and voluntary disclosures).
Decision aid — which path is yours?
① Did the error understate your VAT? → ② Is the underpaid tax ≤ AED 10,000 and correctable in the return for the discovery period, with no FTA audit or assessment already notified? Yes → correct it in the next return. No → ③ submit a voluntary disclosure within 20 business days of becoming aware. Once the FTA has notified you of a tax audit, the window to self-correct on better terms has closed.
Submit a voluntary disclosure in EmaraTax
1. Quantify each error separately
The form requires errors to be disclosed one by one, with the corrected tax position for the affected period. Pull the original return, the corrected figures and the difference per error.
2. Attach supporting documents
Upload the invoices, import declarations or other records that evidence the specific error. The FTA's voluntary disclosure user guide confirms disclosures are reviewed error by error.
3. Submit and pay within 20 business days
After submission, pay the corrected VAT within 20 business days — the late-payment penalty (14% per annum, charged monthly on unpaid amounts) applies from the day after that due date under Cabinet Decision No. 40 of 2017 as amended (Ministry of Finance consolidated text, effective 14 April 2026).
The penalties you are avoiding by self-correcting
| Scenario | Penalty exposure |
|---|---|
| You submit a voluntary disclosure on your own initiative | 1% of the tax difference per month (or part month) from the day after the original due date until the disclosure is submitted — Cabinet Decision No. 40 of 2017, Table 1, violation 11 |
| You fail to disclose before the FTA notifies you of a tax audit | 15% of the tax difference plus 1% per month — Cabinet Decision No. 40 of 2017 as amended, Table 1, violation 12 |
| Incorrect return with no voluntary disclosure and no correction in time | AED 500 fixed penalty — violation 10, unless you correct within the filing deadline or the disclosure creates no tax difference |
Early disclosure is materially cheaper: on a AED 50,000 error discovered 30 months after the due date, a voluntary disclosure carries the 1%-per-month mechanism, while waiting for an audit notification adds a 15% fixed penalty on top (Cabinet Decision No. 40 of 2017 as amended, tables checked September 2026).
Know the time limits
- Disclosure window: a voluntary disclosure must generally be submitted before the FTA notifies you of a tax audit relating to the error — the penalty regime is deliberately structured to reward self-correction first.
- Five-year rule: the FTA is generally precluded from commencing a tax audit or issuing a tax assessment more than five years after the end of the relevant tax period, subject to exceptions such as audits notified before the five years end or a disclosure made in the fifth year (FTA Public Clarification VATP030).
Related terms in error correction
A few concepts sit next to voluntary disclosure: a tax assessment is the FTA's own determination once it finds the error itself, closing off the cheaper self-correction route; a reconsideration request lets you challenge an FTA decision within 40 business days; administrative penalties are the fixed and percentage-based fines in Cabinet Decision No. 40 of 2017; and the FTA's five-year audit window is the outer limit on how far back a correction or assessment can generally reach.
FAQs
What counts as a VAT error I need to correct?
Any mistake that changes the VAT payable or recoverable in a filed return — a misclassified supply, a missed reverse-charge amount, or a wrongly claimed input VAT deduction.
Do I need to correct an error that overstated my VAT, not understated it?
Yes — overpayments and excess recoverable input tax also need correcting, either through a voluntary disclosure or a refund application, generally before the FTA notifies a tax audit.
What if I miss the 20-business-day voluntary disclosure window?
The penalty exposure rises — particularly if the FTA notifies a tax audit before you disclose, which adds a 15% fixed penalty on top of the monthly 1% mechanism.
Can I still correct an error after five years?
Generally no — the FTA is normally precluded from auditing or assessing more than five years after the relevant tax period, subject to specific exceptions such as an audit already notified within that window.
Last reviewed: September 2026 by Gautam Sanoj, Associate Manager – Tax Advisory, Finanshels. Rules as of Federal Decree-Law No. 28 of 2022 on Tax Procedures and Cabinet Decision No. 40 of 2017 as amended; verify current requirements against the FTA (tax.gov.ae) before acting.
Errors usually trace back to bookkeeping gaps. If reconciliations keep surfacing old mistakes, Finanshels' bookkeeping services close the gap at source, and tax consultation reviews the position before you disclose. For the filing mechanics themselves, see how to file VAT returns in the UAE.
