UAE Corporate Tax Deadline: Your Filing Date by Financial Year-End (2026)

People search for "the UAE corporate tax deadline" as if it were one fixed date on a national calendar. It isn't.

Short version: if your financial year ended 31 December 2025, your deadline is 30 September 2026. For any other year-end, it is your year-end plus nine months.

There is no single deadline that applies to every business. Your deadline is set by your own financial year-end, and the same rule produces a different date for a company that closes its books on 31 December than for one that closes on 30 June.

As of 14 April 2026, the penalty for paying late changed, and not in your favour. This article is the reference: how your deadline is calculated, what the current dates are, and what missing them actually costs under the rules now in force.

The one rule behind every deadline

Everything in this article comes from a single rule. You must file your corporate tax return and pay any tax due within nine months of the end of your tax period [1].

Two things sit inside that sentence that businesses tend to miss. First, the nine months covers both filing and payment. The date you submit the return is the same date the money has to be with the Federal Tax Authority (FTA). There is no separate, later payment date. Second, the FTA does not hand out general extensions [2]. If your year-end is fixed, your deadline is fixed.

Your tax period is your financial year. So if you want your deadline, take the last day of your financial year and add nine months. That is it. The rest of this article is just that rule applied to the year-ends most UAE businesses actually use.

Your deadline, by financial year-end

Most UAE companies run a calendar financial year, which means their books close on 31 December. For the year ending 31 December 2025, the corporate tax return and full payment are due by 30 September 2026 [1]. That is the date the majority of the market is working towards this year.

If your year-end is different, the rule does not change. Find your row.

One note on first periods. The rules let a first tax period run longer than twelve months in some cases, so a new company's first deadline can sit further out than it expects. The nine-month rule still holds. It just runs from the end of that longer first period.

What it costs to miss the deadline

This is the section most articles get wrong, because the penalty for late payment was reformed this year and a lot of older guidance has not caught up.

There are three separate penalties, and they can run at the same time.

The late payment charge is the one to watch. Under Cabinet Decision No. 129 of 2025, which came into force on 14 April 2026, unpaid corporate tax now accrues a monthly penalty at an annual rate of 14%, calculated on the tax you owe and running until you pay it [5]. There is no ceiling on it.

Say you owe AED 500,000 and you pay three months late. The late payment penalty alone works out to AED 17,500 (500,000 at 14% for a quarter of a year), before you add the monthly late filing charge on top. The tax was always going to be due. The penalty is the part you could have avoided by hitting a date you already knew.

Registration is only a deadline if you are not registered yet

For most businesses, registration is not a 2026 problem. The staggered registration deadlines set out in FTA Decision No. 3 of 2024 ran through 2024 and have passed [3]. If you registered then, this section is not about you.

It still matters in three cases. A newly incorporated company has to register within the window set for new entrants. A natural person running a business has to register once their turnover crosses AED 1 million in a calendar year, with the registration due by 31 March of the following year [6]. And any business that simply never registered is still exposed to the AED 10,000 penalty.

There is one piece of relief worth knowing if you registered late. The FTA's penalty waiver cancels or refunds the AED 10,000 late registration penalty if you file your first return through the EmaraTax platform within seven months of the end of your first tax period, rather than the usual nine [7]. The catch for 2026 is timing. That window is measured from your first period-end, not a national cut-off. For businesses whose first tax period was the 2024 calendar year, the window closed on 31 July 2025. It is still open only if your first period ended more recently. The FTA has said more than 68,600 businesses had used the waiver by early 2026 [7], which tells you how many registered late in the first place.

The other 2026 deadline worth knowing: Small Business Relief

One more date belongs in any honest deadline reference, because it is the last chance at a real saving for smaller companies.

Small Business Relief lets a resident business with revenue of AED 3 million or less elect to be treated as having no taxable income, so it pays no corporate tax for that period [8]. The relief was always temporary. It applies only to tax periods ending on or before 31 December 2026 [8]. For a calendar-year business, the period ending 31 December 2026 is the final one that can use it, and no extension has been announced.

Two things to keep straight. The relief is an election, so you have to claim it in your return rather than receive it automatically. And the AED 3 million test looks at the current period and every earlier one since June 2023. Cross the threshold once and you lose access for good, even if revenue drops again later [8].

Getting the date right is the easy part

The deadline is the simplest part of corporate tax. It is a fixed date, set by a year-end you already know, published well in advance. The hard part is being ready to file something accurate by then: books closed and reconciled, your taxable income worked out properly, and the Small Business Relief decision made on real numbers rather than a guess in September.

That is the work that does not fit into the final month. A penalty is the visible cost of missing a deadline. The quieter cost is a rushed, wrong return filed on time, which the FTA can still question years later.

Corporate tax is also not the only deadline converging on UAE businesses right now. We mapped the others in Practical Steps to Stay Ahead of Regulatory Changes, and our tax and compliance work exists to keep all of them off your desk. For quick answers to common questions, see our corporate tax FAQs.

Sources

[1] Federal Tax Authority urges submission of corporate tax returns and settlement of liabilities within nine months from the end of the tax period — Federal Tax Authority (2025). tax.gov.ae

[2] Federal Tax Authority emphasises the need to submit tax returns and settle corporate tax payable within specified deadlines — Federal Tax Authority (2025). tax.gov.ae

[3] UAE Corporate Tax: FTA Decision No. 3 of 2024 – Registration Timeline — PwC Middle East (2024). pwc.com

[4] Cabinet Decision No. 75 of 2023 on the Administrative Penalties for Violations Related to the Application of the Corporate Tax Law — UAE Ministry of Finance (2023). mof.gov.ae

[5] United Arab Emirates: Revised administrative penalty framework for violation of tax laws (Cabinet Decision No. 129 of 2025) — PwC Middle East (2025). pwc.com

[6] Federal Tax Authority issues public clarification on registration timelines for taxable persons for corporate tax — Federal Tax Authority (2024). tax.gov.ae

[7] Federal Tax Authority to waive penalty for late corporate tax registration — Federal Tax Authority (2025). tax.gov.ae

[8] Ministry of Finance issues decision on Small Business Relief for corporate tax purposes — UAE Ministry of Finance (2023). mof.gov.ae