UAE corporate tax filing deadline 2026: missed it? What to do now

UAE corporate tax returns must be filed, and the tax paid, within 9 months of the end of your tax period. For a 31 December 2025 year end, the deadline was 30 September 2026, as the FTA confirmed in its press release of 26 September 2026. If you missed it, a late filing penalty of AED 500 started on 1 October 2026. It rises by AED 500 for each further month or part month, and any unpaid tax also attracts a late payment penalty of 14% a year, charged monthly.

The fix is simple in principle: file now, pay now, and correct any errors through a voluntary disclosure. Every month or part month you wait adds to the bill.

If you are reading this in October or November, you are not in disaster territory yet. The penalties at this stage are modest compared with what happens if a missed return sits ignored for a year. What matters now is doing things in the right order, so that you stop the meter running rather than just paying it.

The UAE corporate tax filing deadline for 2026

Your deadline depends on your own year end, not on the calendar year. Count 9 months from the last day of your tax period. That date is your deadline for filing the return and for paying the tax.

There are no provisional or advance payments. The whole liability falls due on the same day as the return.

Exempt persons that are required to register are covered too. They file an annual declaration on the same 9-month basis and face the same AED 500 and AED 1,000 monthly penalties if they are late. You can file on EmaraTax yourself or through an FTA-registered tax agent. Whichever route you choose, keep your records for at least 7 years. If this is your first filing, our guide to your first UAE corporate tax return covers the documents you will need.

What missing the deadline costs

The penalties come from Cabinet Decision 75 of 2023, which took effect on 1 August 2023 and was amended by Cabinet Decision 10 of 2024 from 1 March 2024. We found no later amendment to the corporate tax figures as at October 2026.

• Late filing: AED 500 per month or part month for months 1 to 12, then AED 1,000 per month from month 13. The penalty is charged from the day after the deadline and then on the same date each month.

• Late payment: 14% a year, applied monthly to unpaid tax from the day after the due date.

• Late registration: a flat AED 10,000.

• Incorrect return: AED 500, unless you correct it before the filing deadline.

Here is a worked example, which shows illustrative arithmetic only. Take a company with a 31 December 2025 year end and AED 50,000 of tax due, which files and pays on 15 December 2026.

The late filing penalty is AED 500 charged on 1 October, 1 November and 1 December, which comes to AED 1,500. For late payment, 14% divided by 12 is about 1.17% a month. On AED 50,000 that is roughly AED 583 a month, and three monthly charges add up to about AED 1,750. The total is around AED 3,250.

Leave the same return for 13 months or more and the monthly filing penalty doubles to AED 1,000, while the 14% late payment penalty keeps running on the unpaid tax. For the wider picture, read the real cost of financial non-compliance in the UAE.

Missed the deadline? What to do now, in order

Work through these six steps in sequence. Skipping ahead usually costs money.

1. Check your registration and tax period on EmaraTax. Confirm that your corporate tax registration exists and that the tax period shown matches your financial year. If either is wrong, every later step is built on sand. The EmaraTax guide walks through the screens.

2. File the return now. The filing penalty stops increasing once the return is submitted. Make it as accurate as you can, because an error found later must be corrected by voluntary disclosure, which carries its own penalty.

3. Pay the tax due. The 14% a year late payment penalty runs until the tax is paid, so settle it as soon as you file.

4. Correct any errors with a voluntary disclosure. If you later find that you understated your tax, disclose it. Do not wait for the FTA to find it first.

5. Decide whether to challenge or ask for relief. Look at reconsideration, a waiver or instalments, which are covered below.

6. Set up next year's deadline so it does not happen again. Put the 9-month date in the diary. Book your accountant for month 5, not month 9, and assign one named person to own the filing.

Voluntary disclosure: what it costs and why it is still cheaper

Under Article 10 of the Tax Procedures Law, a voluntary disclosure is mandatory if a return you filed understated your tax. This is a legal duty, not an optional courtesy.

The penalty under items 8, 10 and 11 of Cabinet Decision 75 is 1% a month on the tax difference. It runs from the day after the return's original due date until the date you submit the disclosure. If you only fix the error after the FTA has notified you of an audit, the penalty becomes a fixed 15% of the tax difference plus the same 1% a month.

Compare two scenarios with AED 20,000 of understated tax that you spot six months after the deadline. If you disclose voluntarily, the penalty is about AED 1,200. If the same error surfaces after an audit notice, you pay AED 3,000 on top of the monthly charge. Mismatches, such as revenue on your VAT returns that does not reconcile to your corporate tax return, are the kind of thing an FTA review picks up, so assume inconsistencies will be noticed.

Any tax shown on a disclosure is due within 20 business days of submission. Since 1 January 2026, Federal Decree-Law 17 of 2025 has also set a time limit: a voluntary disclosure generally cannot be filed more than five years after the end of the tax period it relates to (there is an exception linked to refunds), so old errors cannot simply wait.

Reconsideration, waivers and instalments

You have three routes for relief. Each one has strict conditions.

Reconsideration lets you challenge any FTA decision, including a penalty, within 40 business days of being notified under Article 29 of the Tax Procedures Law. The FTA then decides within 40 business days. Use this route when you think the penalty was applied wrongly, not merely because it hurts.

A penalty waiver or instalment request goes to the FTA committee through EmaraTax under Article 50 and Cabinet Decision 105 of 2021. To qualify, the penalties must still be unsettled and you must have no payable tax outstanding for that period. Instalments are only available where penalties total at least AED 50,000. You must also include an undertaking that the violation has been corrected.

There is also a separate late registration waiver. The AED 10,000 late registration penalty is waived if your first return or annual declaration is filed within 7 months of the end of your first tax period, as announced by the FTA on 7 May 2025. It does not cover late filing or late payment penalties. For a first period ending 31 December 2025, that window closed on 31 July 2026. The full eligibility rules are set out in our piece on the UAE corporate tax penalty waiver: who qualifies and how to claim.

Traps that catch late filers

A few misunderstandings come up again and again with businesses that have missed the 30 September cut-off.

The first is thinking the 14% rate is new for corporate tax. It has applied to corporate tax since 1 August 2023. The change on 14 April 2026, made by Cabinet Decision 129 of 2025, moved VAT and excise late payment to 14% a year. It did not change corporate tax.

The second is reading the AED 375,000 figure as a filing threshold. It is a 0% band, and every taxable person must still file a return. Our explainer on how the UAE corporate tax rate works sets out the bands.

The third is Small Business Relief. The relief is claimed in the return itself, so an eligible business still has to file by the deadline, and a late return attracts the same late filing penalty as any other.

The fourth catches calendar-year companies in particular. Corporate tax applies to financial years starting on or after 1 June 2023, so for a calendar-year company the 30 September 2026 deadline was usually its second return. If the first one was also late or never filed, deal with that period first.

Frequently asked questions

Is there a grace period after 30 September 2026? No. The late filing penalty of AED 500 applied from 1 October 2026, the day after the deadline. The 14% late payment penalty on unpaid tax also started running from that date.

Do I have to file if my taxable income is below AED 375,000? Yes. The AED 375,000 band is taxed at 0%, but every taxable person must file a return regardless. Missing the return triggers the same late filing penalty as for any other business.

Did the late payment penalty change in 2026? Not for corporate tax. The 14% annual rate has applied to corporate tax since August 2023. The April 2026 change affected VAT and excise only.

Can I still get the late registration penalty waived? Only if you file your first return or declaration within 7 months of the end of your first tax period. For a first period ending 31 December 2025, that window closed on 31 July 2026. The waiver never covers late filing or late payment penalties.

Can I pay penalties in instalments? You can ask, but only if your unsettled penalties total at least AED 50,000 and you have no payable tax outstanding for that period. You apply through EmaraTax to the FTA committee and include an undertaking that the violation has been corrected. The committee decides within 110 business days and may refuse.

A missed 2026 deadline is fixable, and at this stage it is usually cheap to fix. File the return, pay the tax, disclose any errors before the FTA finds them, and only then look at relief. The businesses that end up with five-figure penalty bills are rarely the ones that filed late. They are the ones that filed late and then did nothing. If you need a late return filed or your voluntary disclosure position checked, book a call with Cosmos. We coordinate UAE corporate tax registration and filing through an FTA-registered tax agent, and our fractional CFO support can help rebuild the books behind the return.