Quick answer: A corporate tax voluntary disclosure is how you tell the Federal Tax Authority (FTA) about an error in a return you have already filed. If the error understates your tax by more than AED 10,000, you generally must submit a voluntary disclosure within 20 business days of becoming aware of it, and the penalty is 1% of the tax difference per month from the original due date. Errors of AED 10,000 or less can generally be corrected through a later return, and some errors with no tax impact are corrected through the return, not a disclosure. Not every error needs the same procedure, so check which route applies before you act. Speak to our corporate tax consultants in the UAE.
Last updated: November 2026. This area of law changed in 2026, so confirm the current rules and FTA guidance before you rely on this article.
Finding a mistake in a filed corporate tax return is stressful, but it is also common. The way you correct it matters. Choosing the wrong procedure, or waiting too long, can increase penalties. This guide explains the correction routes, the deadlines, the penalties, and how to submit a disclosure on EmaraTax.
What is corporate tax voluntary disclosure in the UAE?
A voluntary disclosure is a formal notification to the FTA that a previously filed tax return, assessment or refund application contains an error or omission. It is set out in Article 10 of the Tax Procedures Law (Federal Decree-Law No. 28 of 2022) and its Executive Regulation (Cabinet Decision No. 74 of 2023, as amended).
It is called “voluntary” because you make it before the FTA finds the error. A disclosure made before an audit notification attracts a much lower penalty than an error the FTA finds first. In some cases, however, the law requires you to make it.
When should a business submit a corporate tax voluntary disclosure?
The right route depends on the type and size of the error:
| Situation | Typical route |
|---|---|
| Error found before the filing deadline | Correct the return before the deadline, if the system allows it. Summaries say the AED 500 incorrect-return penalty does not apply if you correct it in time |
| Error understates tax by more than AED 10,000 | Voluntary disclosure within 20 business days of becoming aware of the error |
| Error understates tax by AED 10,000 or less | Generally corrected in a later return. A voluntary disclosure applies if no later return is available |
| Error with no tax difference | Since 1 January 2026, a voluntary disclosure only where the FTA specifies. Otherwise correct it through the return |
| Overpayment (tax overstated) | No tax to pay, but the correction needs to be made properly, and any refund follows FTA refund procedures |
| The FTA has notified you of an audit or issued an assessment | Respond to the audit or assessment. A disclosure at this stage carries a higher penalty |
Do not assume every error needs the same voluntary disclosure procedure.
What types of corporate tax errors require correction?
- Incorrect revenue: revenue omitted, double counted or recorded in the wrong period. See our guide to VAT and corporate tax reconciliation, which is a common way to find these.
- Incorrect expenses: deductions claimed that are not deductible, or deductible expenses missed.
- Wrong taxable income: a mistake in the figure carried from the accounts to the return.
- Missing adjustments: exempt income, non-deductible items, related-party adjustments, or losses not applied.
- Incorrect tax calculation: arithmetic errors, wrong rate or threshold, or mistakes in carried-forward balances.
- Incorrect tax treatment: a wrong election or classification, such as a mistake in a Small Business Relief or Qualifying Free Zone Person position. See our guides to Small Business Relief and free zone corporate tax.
The size of the error, and whether it changes the tax due, decides the route. A single mistake can also have both a tax effect and a nil effect, so quantify it first.
Voluntary disclosure vs corporate tax return correction
| Factor | Voluntary disclosure | Correction through a return | Responding to an FTA assessment |
|---|---|---|---|
| When it applies | Errors above AED 10,000 that understate tax, errors in refunds, and cases the FTA specifies | Smaller errors, and errors with no tax impact outside the cases the FTA specifies | After an audit notice or assessment from the FTA |
| Deadline | 20 business days from becoming aware of the error | In the relevant later return, or before the filing deadline | Set by the FTA notice and the dispute rules |
| Penalty | 1% per month of the tax difference until the disclosure is submitted | No disclosure penalty. An AED 500 incorrect-return penalty may apply | Higher penalties apply, including a fixed 15% on top of 1% per month |
| Who starts it | You | You | The FTA |
UAE corporate tax voluntary disclosure rules and deadlines
- Legal basis: Article 10 of the Tax Procedures Law (Federal Decree-Law No. 28 of 2022), as amended by Federal Decree-Law No. 17 of 2025 with effect from 1 January 2026. The Executive Regulation is Cabinet Decision No. 74 of 2023, as amended by Cabinet Decision No. 17 of 2026.
- Deadline: where a voluntary disclosure is required, submit it within 20 business days of the date you become aware of the error. Count from the date you identified the first error if there are several.
- AED 10,000 test: errors above AED 10,000 require a voluntary disclosure. Errors of AED 10,000 or less may be corrected in a return that has not yet become due, or in the return for the period in which you found the error. If there is no return available to correct them, a voluntary disclosure is the route.
- Payment: tax arising from a voluntary disclosure is due 20 business days after the disclosure is submitted. A late payment penalty of 14% per annum applies to tax that remains unpaid.
- No tax difference: since 1 January 2026, a voluntary disclosure is required for errors with no tax impact only in cases the FTA specifies. Other such errors are corrected through the return.
The FTA may issue guidance specifying the cases where a disclosure is required, so check its current publications.
How to submit a corporate tax voluntary disclosure through EmaraTax
- Identify and quantify the error. Work out the corrected taxable income and the tax difference, and record the date you became aware of the error.
- Check the route. Apply the AED 10,000 test and the rules above, so you know whether a voluntary disclosure is required.
- Log in to EmaraTax with your Corporate Tax registration and open the voluntary disclosure service for the tax period concerned.
- Enter the original and corrected figures and the date you discovered the error.
- Attach an explanation and supporting documents.
- Submit, and keep the acknowledgement.
- Pay the tax difference within 20 business days of submission, and check the penalty assessment when the FTA issues it.
The FTA’s published user guide for voluntary disclosures that I could find covers VAT and excise. Screens and steps for corporate tax may differ, so confirm the current corporate tax workflow with the FTA or your adviser.
Documents and information required
- The original return and the corrected computation.
- A written explanation of the error, how it arose and when you became aware of it.
- Updated financial statements or workings.
- Supporting documents: invoices, contracts, ledgers, reconciliations, tax adjustments.
- Evidence of any payment already made, and the calculation of the tax difference.
- Correspondence with the FTA, if any.
Our accounting services in Dubai can prepare reconciliations and updated financial information.
Corporate tax voluntary disclosure penalties
| Situation | Penalty |
|---|---|
| Voluntary disclosure of an error that understated tax, submitted before the FTA notifies an audit | 1% of the tax difference per month or part of a month, from the day after the original due date until the disclosure is submitted |
| Failure to disclose before an audit notification | A fixed 15% of the tax difference, in addition to the 1% monthly penalty |
| Incorrect tax return | AED 500, unless corrected before the return deadline or by a voluntary disclosure with no tax difference |
| Tax paid late | 14% per annum, charged monthly on the unpaid amount |
These amounts come from Cabinet Decision No. 129 of 2025, in force since 14 April 2026, which replaced earlier schedules. Older articles that quote 4% per month or a 5% to 40% tiered penalty are out of date. Confirm the amounts in the decision, because the schedule has been reissued.
Example (hypothetical): A return understated tax by AED 50,000. The error is found and disclosed four months after the original due date, before any audit notice. The disclosure penalty is 1% × 4 = 4% of AED 50,000, which is AED 2,000. The AED 50,000 of tax is due within 20 business days of submission, and unpaid amounts then attract the 14% per annum late payment charge.
Underpayment, overpayment and no tax difference
- Underpayment: a disclosure is generally required above AED 10,000, with the penalties above.
- Overpayment: the correction reduces the tax due. Any refund or credit follows the FTA’s refund rules and time limits, so act promptly.
- No tax difference: the percentage penalty is nil, and since 1 January 2026 the correction is through the return unless the FTA specifies otherwise. An AED 500 penalty for an incorrect return may still apply.
What happens if you discover an error after filing?
- Stop and record the date you became aware of the error, because the 20 business days start then.
- Quantify the tax difference and check whether it changes the tax due.
- Choose the route: disclosure, correction through a return, or no action required.
- File and pay on time to limit the penalty, which accrues monthly.
- Fix the cause, for example a reconciliation or classification error, so it does not repeat in later years.
If the FTA notifies you of an audit before you disclose, the position changes, so take advice immediately. Keep the corporate tax records for at least seven years after the end of the relevant tax period.
Common mistakes during voluntary disclosure
- Waiting beyond the 20 business days.
- Assuming every error needs a voluntary disclosure, or that none does.
- Not quantifying the tax difference before filing.
- Correcting the numbers in the accounts but not in the tax computation.
- Forgetting to pay the tax within 20 business days.
- Ignoring related periods that contain the same error.
- Disclosing without an explanation or supporting documents.
- Waiting until after an FTA audit notification.
How professional tax consultants can help
A consultant can review the filed return, quantify the tax difference, confirm which correction route applies, prepare the disclosure and evidence, and calculate the penalty, so that you correct the error once and correctly. Our corporate tax consultancy team can review your return, and our UAE corporate tax guide explains registration and filing.
Found an error in a filed return? Request a review of your corporate tax filing before the 20-business-day period runs out.
Frequently asked questions
What is a corporate tax voluntary disclosure in the UAE?
It is a formal notification to the FTA of an error in a filed tax return, assessment or refund application. It is governed by Article 10 of the Tax Procedures Law and its Executive Regulation.
What is the deadline for a corporate tax voluntary disclosure?
Where one is required, it must be submitted within 20 business days of becoming aware of the error.
Do all errors need a voluntary disclosure?
No. Errors above AED 10,000 that understate tax need one. Smaller errors can generally be corrected in a later return, and some errors with no tax impact are corrected through the return unless the FTA specifies a disclosure.
What is the penalty for a voluntary disclosure?
1% of the tax difference per month or part of a month, from the day after the original due date until the disclosure is submitted. If you do not disclose before an audit notification, a fixed 15% is added.
Can I amend a corporate tax return before the deadline?
If the filing deadline has not passed, ask the FTA or your adviser whether you can file a corrected return. Summaries say the AED 500 incorrect-return penalty does not apply if you correct it before the deadline.
What if I overpaid corporate tax?
The correction reduces your tax due, and any refund or credit follows the FTA’s refund procedures and time limits. Take advice so you do not miss them.
When is the tax from a voluntary disclosure due?
20 business days after the disclosure is submitted. Unpaid amounts then attract a late payment charge of 14% per annum.
Is a voluntary disclosure the same as responding to an FTA assessment?
No. A voluntary disclosure is submitted by you. An assessment is issued by the FTA after an audit and follows its own dispute process.
Sources and Official References
- Federal Decree-Law No. 16 and 17 of 2025, KPMG UAE (Article 10(5) of the Tax Procedures Law)
- Cabinet Decision No. 17 of 2026: amendment to the Tax Procedures Executive Regulations, BDO UAE
- Administrative penalties in the UAE: the 2025 reform, Legal 500 (Cabinet Decision No. 129 of 2025)
- Federal Decree-Law No. 28 of 2022 on Tax Procedures, as amended by Federal Decree-Law No. 17 of 2025
- Cabinet Decision No. 74 of 2023 (Executive Regulation of the Tax Procedures Law), as amended by Cabinet Decision No. 17 of 2026
- Cabinet Decision No. 129 of 2025 on administrative penalties for tax violations
- FTA: record retention and Corporate Tax return deadline, Federal Tax Authority
Disclaimer: This content is provided for general informational purposes only and does not constitute tax or legal advice. Voluntary disclosure rules, thresholds and penalties changed in 2026 and may change again, and the correct route depends on the facts. Please consult a qualified adviser before correcting a filed return.
