UAE Corporate Tax across a client book: there is no single deadline, and each client carries four dates

Almost everything written about the UAE Corporate Tax deadline is written for one company asking about its own return. A practice has a different problem. It is not asking when the deadline is, it is asking how many deadlines it is holding, which of them have already passed, and which client is accruing a penalty this morning while nobody is looking at its file.

This page is about that second problem. It is not tax advice; Federal Decree-Law No. 47 of 2022, the Cabinet and Ministerial Decisions and the FTA guides control.

1. The filing date is derived per client, never looked up

There is no national filing date in the law to look up. There is a rule that produces a different date for each client.

A Taxable Person's Tax Period is its Financial Year, or part of one, for which a Tax Return is required (Article 57(1) of Federal Decree-Law No. 47 of 2022). The Financial Year is the Gregorian calendar year, or the twelve month period for which that person prepares financial statements (Article 57(2)). The return is then due no later than nine months from the end of the relevant Tax Period (Article 53(1)), and the Corporate Tax Payable is settled within the same nine months (Article 48(1)).

So the date is a function of one input the practice already holds in its accounts files: the client's own period end.

Every other year end is worked in the deadline guide. The point for a practice is structural rather than arithmetical: a client book with four different year ends in it has four Corporate Tax seasons, not one, and the 30 September date that the press writes about is only the busiest of them.

Two consequences follow immediately. A date typed once into a spreadsheet and then maintained by hand goes wrong the first time a client changes its year end, and a client can change it: Article 58 lets a Taxable Person apply to the Authority to change the start and end date of its Tax Period, or use a different one, subject to the Authority's conditions. And the return date and the payment date are the same date, so a client that filed on time and paid late has met one obligation and missed the other, which is two different penalties on one file.

2. Four clocks per client, not one

The return is the visible one. Three others run beside it, and each has its own trigger.

Registration. Any Taxable Person must register for Corporate Tax and obtain a Tax Registration Number in the form, manner and timeline prescribed by the Authority (Article 51(1)). Failing to register in time is a fixed AED 10,000 penalty under Cabinet Decision No. 10 of 2024, amending Cabinet Decision No. 75 of 2023. It does not depend on whether the client owed any tax. For a practice, this is the clock that runs on new incorporations, where the client is busy and nobody has yet been appointed to watch it. The return and the payment. Nine months, as above, both on the same day. Deregistration. A Person with a Tax Registration Number must file a Tax Deregistration application where its Business ceases, by dissolution, liquidation or otherwise, again in the timeline the Authority prescribes (Article 52(1)). Records. A Taxable Person must keep all records and documents supporting the information in a Tax Return, and enabling its Taxable Income to be ascertained, for seven years following the end of the Tax Period they relate to (Article 56(1)). An Exempt Person keeps the records that establish its status for the same seven years (Article 56(2)). That outlasts most engagement letters.

3. The client that closed is the one that bites

The single most expensive row in a practice's tracker is the client marked closed.

Article 52(2) is explicit: a Taxable Person shall not be deregistered unless it has paid all Corporate Tax and Administrative Penalties due and filed all Tax Returns due, including the return for the Tax Period up to and including the date of cessation. There is a final return, and the deregistration cannot complete without it.

And the file does not go quiet if nobody acts. Where a Person does not comply with the deregistration requirements, the Authority may deregister it at its own discretion, effective from the later of the last day of the Tax Period in which it became apparent to the Authority that the Article 52(2) conditions were met, or the date the Person ceased to exist (Article 52(4)).

So the practical failure is this. A client tells the practice it has wound up. The row is deleted from the tracker. The final return is never filed, the registration stays live, and the late filing penalty runs at AED 500 for each month or part month for twelve months and AED 1,000 a month after that (Cabinet Decision No. 75 of 2023, violation 7), on an entity nobody is watching. A tracker that lets you delete a client is the wrong shape. The row has to survive until the deregistration is approved.

4. A Tax Group is one return and many entities

Where clients are grouped, the entity count and the filing count stop matching. The Parent Company files a Tax Return to the Authority on behalf of the Tax Group (Article 53(7)), and the Tax Group is treated as a single Taxable Person for the purposes of the Decree-Law (Article 40).

A tracker keyed on legal entities therefore overstates the work on a group client and understates the concentration risk, because one missed date can be one return covering ten companies. A tracker keyed only on filings loses sight of the members whose records still have to support that one return under Article 56.

5. What a late client is actually costing, worked once

The two penalties behave differently, which is why "the client is late" is not yet an answer to "how bad is it".

Violation 7 in Cabinet Decision No. 75 of 2023 is the late return: AED 500 for each month or part month for the first twelve months, then AED 1,000 for each month or part month. It ignores the tax due entirely. Violation 8 is the late payment: 14 percent a year on the unsettled Payable Tax, charged monthly, each part month counting as a month.

Take one client, four months late on both, with AED 90,000 of unpaid tax. The late return penalty is four charges of AED 500, so AED 2,000. The late payment penalty is four months at 14 percent a year, so 4.6667 percent of AED 90,000, which is AED 4,200. Total AED 6,200, and only the second half of it is still growing in proportion to anything. A dormant client with nil tax, four months late, is at AED 2,000 and climbing on the fixed clock alone. The crossover point, and the full working for both penalties, is in the penalties guide.

6. Doing this for a book rather than a client

The arithmetic above is not hard. Doing it for forty clients, each with its own period end, its own Small Business Relief history and its own e-invoicing phase, and keeping it right as year ends move, is the part that fails.

The client deadline tracker takes the whole list at once: paste one client a line and it returns the return and payment date, whether it is overdue, the penalty running on it today, whether Small Business Relief is available with the cumulative one-way test applied, and which e-invoicing phase the client sits in. It runs in your browser, nothing is uploaded and there is no sign-up, so real client names can go in it. It is free.

What a practice buys, rather than uses free, is the computation itself and the licence to use it on client engagements: that is set out on the page for tax agents, and the checking behind it is listed check by check on the verification page.