Applies to all tax periods under the UAE corporate tax regime, which took effect for financial years starting on or after 1 June 2023.
What changed
This is a standing rule rather than a new one, and it is the single most common source of misunderstanding we are asked about. The Ministry of Finance states that taxable persons are required to file a corporate tax return for each tax period within nine months from the end of the relevant period.
Because a tax period follows the company’s own financial year, two companies registered in the same free zone in the same month can have deadlines six months apart.
Who is affected
Every taxable person, including free zone persons. It matters most to companies that assume a calendar-year deadline because that is what they have heard from other business owners, and to companies whose first tax period was a long or short one following incorporation.
What businesses should do
- Find your actual financial year end — it is on your licence documentation and in your constitutional documents.
- Add nine months. That is your filing date.
- Check it against the record on your FTA portal rather than relying on the arithmetic alone.
- Work backwards: records complete two months before, computation drafted one month before.
- If your first period was unusual in length following incorporation, confirm it specifically rather than assuming twelve months.
Nine months from the end of each tax period. A period ending 31 December 2025 is due by 30 September 2026; a period ending 31 March 2026 is due by 31 December 2026.
Business implications
The risk is not really the arithmetic — it is that a company which believes its deadline is later than it is will start preparing late. Where the books need work first, a three-month misunderstanding is the difference between a routine filing and an emergency.
Administrative penalties apply to late filing, and they are set by Cabinet Decision. We do not publish penalty figures we have not re-verified on the review date — if you have received a notice, send it to us and you will get the actual position.
A practical example
Two companies incorporated in the same week: one adopts a 31 December year end, the other 30 June. The first files by 30 September; the second by 31 March of the following year. Both were told “nine months” and both were right — but only one of them was right about September.
Questions this raises
What is my tax period?
Normally your financial year. A first period following incorporation can be longer or shorter, so it is worth confirming rather than assuming.
Is the deadline the same as the payment date?
Filing and payment obligations both sit within the statutory framework; the practical rule is that a return filed on time with payment made late is still a problem. Check your own portal record.
Do I file if the company made a loss?
Yes. The obligation attaches to being a taxable person, not to making a profit — and carrying the loss forward correctly is worth doing properly.
What if I have already missed it?
File as soon as you can and deal with the penalty position at the same time. Raising it yourself is materially better than being asked about it.
Official sources
A news article is a lead, not a source. These are the issuing authorities’ own publications:
This update is general information about UAE regulation as at the date shown. It is not tax, legal or accounting advice, and it does not take account of your circumstances. Regulations change and guidance is issued over time. Confirm your position with a qualified adviser, or contact Aizaa, before acting. Aizaa Management Consultancy is an independent consultancy and is not a government authority.
Published 8 September 2026. Last reviewed and updated 22 September 2026. This update is re-verified at least quarterly. If you believe anything here is out of date, tell us and we will publish a dated correction rather than editing silently.