UAE Corporate Tax Deadline 30 September 2026: Are You Ready?

If your company's financial year runs January to December, your UAE Corporate Tax return and payment for FY2025 are due by 30 September 2026.

That is a hard deadline. The Federal Tax Authority does not send reminders, does not grant informal extensions, and starts charging penalties from the first day you are late — including for businesses that owe no tax at all.

This guide covers who the deadline applies to, what missing it actually costs, the mistakes we see most often, and a checklist you can work through before the date.

Who This Deadline Applies To

The 30 September 2026 deadline applies to any taxable person whose first or current tax period ended on 31 December 2025 — which covers the large majority of UAE companies, since most run a calendar financial year.

That includes:

• Mainland LLCs and sole establishments holding a UAE trade licence

• Free zone companies, including those paying 0% as a Qualifying Free Zone Person

• Non-resident entities with a permanent establishment in the UAE

• Businesses claiming Small Business Relief, whose taxable income is treated as nil

• Companies that made a loss, or had no revenue at all

If your financial year ends on a different date, your deadline is nine months after your year end — 30 June 2026 for a 30 September 2025 year end, 31 December 2026 for a 31 March 2026 year end, and so on.

The most expensive misunderstanding in UAE tax right now

Owing no tax does not exempt you from filing.

We have had this conversation with more founders than any other. A company earns AED 200,000 in profit, sits comfortably below the AED 375,000 threshold, and concludes there is nothing to file. Or a free zone business assumes its 0% rate means it is outside the system entirely.

Neither is correct. The 0% band, Small Business Relief, and Qualifying Free Zone Person status are all reliefs applied within a return you still have to submit. Skip the return and you are late — and the penalty is charged on the failure to file, not on the tax owed. Businesses with zero liability regularly end up paying thousands in penalties for exactly this reason.

What Missing the Deadline Actually Costs

The penalties are fixed, automatic, and accumulate monthly.

Two details worth pausing on.

Part of a month counts as a full month. File on 2 October and you owe the same AED 500 as someone who files on 30 October.

The late payment interest has no ceiling. At 14% per annum — roughly 1.17% each month — an unpaid liability keeps growing for as long as it stays unpaid. On a AED 90,000 tax bill, that is a little over AED 1,000 added every month.

There is one piece of good news. Under Cabinet Decision No. 10 of 2024, the AED 10,000 late registration penalty can be waived if you file your first tax return within seven months of your first tax period ending, rather than the usual nine. If you registered late and your first period ended 31 December 2025, that window closed on 31 July 2026 — but it is worth checking your own dates before assuming the penalty stands.

Seven Mistakes We See Most Often

1. Treating accounting profit as taxable income. These are not the same number. Your taxable income starts with accounting profit and is then adjusted — adding back non-deductible items, applying exemptions, and accounting for reliefs. Filing your net profit figure straight from your P&L is one of the most common errors, and it usually means you have overpaid or underpaid.

2. Assuming free zone status means automatic 0%. Qualifying Free Zone Person status requires meeting five cumulative conditions, including adequate economic substance in the zone, qualifying income from qualifying activities, transfer pricing compliance, audited financial statements, and non-qualifying revenue below the de minimis threshold. Fail one condition and your entire taxable profit moves to the 9% rate — not just the non-qualifying portion.

3. Forgetting to actually elect Small Business Relief. Relief is not automatic. If your revenue is AED 3 million or below and you qualify, the election has to be made explicitly in the return. Companies that qualify but do not tick the box are assessed at standard rates. This is a genuinely costly clerical mistake.

4. Undocumented owner salaries and related-party transactions. Payments to owners, directors, or connected companies must be at arm's length and supported by documentation — contracts, board resolutions, evidence of the work performed. Without that, the FTA can disallow the deduction, which increases your taxable income after the fact.

5. Claiming non-deductible expenses. Entertainment costs are only 50% deductible. Fines and penalties are not deductible at all. Personal expenditure run through the business is not deductible. These are routine adjustments that get missed when a return is prepared straight from the bookkeeping file.

6. Weak record-keeping. UAE law requires financial records to be retained for seven years, and the FTA can request them at any point. Failure to maintain proper records is its own AED 10,000 penalty, entirely separate from anything relating to your return.

7. Starting too late to fix anything. This is the one that turns a small problem into an expensive one. If you open your books in the third week of September and discover a year of unreconciled transactions, missing invoices, or misclassified expenses, there is no longer time to correct it properly. You either file something you know is wrong, or you file late. Both cost money.

Your Pre-Filing Checklist

Work through this in order. Most of it is preparation, not filing.

Confirm your position

• Confirm you are registered for Corporate Tax and have your Tax Registration Number

• Confirm your exact tax period and your filing deadline

• Confirm whether you are filing as a mainland entity, a free zone entity, or a Qualifying Free Zone Person

• Confirm whether you qualify for Small Business Relief, and whether you intend to elect it

Get your records in order

• Close the books for the full financial year

• Reconcile every bank account to the closing balance

• Confirm all revenue is recognised in the correct period

• Chase and file any missing purchase invoices or receipts

• Update the fixed asset register, including additions, disposals, and depreciation

• Produce your financial statements — audited, if your free zone or licence requires it

Prepare the computation

• Adjust accounting profit to taxable income

• Add back non-deductible expenses in full, and entertainment at 50%

• Apply the 0% band to the first AED 375,000 of taxable income

• Document any exemption or relief you are claiming, with the reasoning

• Prepare transfer pricing documentation if you have related-party transactions

• If you are a QFZP, evidence each of the five conditions and check your de minimis position

File and pay

• Submit the return through EmaraTax before 30 September

• Pay any tax due by the same date — filing alone does not stop late payment interest

• Save the submission acknowledgement and the payment confirmation

• Archive the full supporting file for seven years

If You Have Not Started Yet

There is still time, but the sequence matters. Prioritise in this order:

First, confirm you are registered. If you are not registered at all, do that immediately — it is the single largest fixed penalty on the list, and the return cannot be filed without a TRN.

Second, close and reconcile the books. This is where nearly all the work sits, and it is the step that cannot be compressed. If your bookkeeping is current, the return itself takes hours. If it is not, this is a multi-week job and starting now is genuinely the difference between filing correctly and filing late.

Third, prepare the computation and file. Leave enough room to review the numbers before submitting, rather than filing something you would rather have checked.

If your books are behind, be realistic about the timeline and get help early. The cost of a proper cleanup is almost always less than the combined cost of penalties, interest, and an incorrect filing you later have to disclose and correct.

Getting It Filed

OwnYourCFO works with UAE SMEs on exactly this: bringing books up to date, preparing the corporate tax computation, applying the reliefs you are entitled to, and filing on time through EmaraTax.

If you are not sure where you stand, a short review will tell you quickly — whether you are registered, what your deadline is, whether your books can support a return, and what your likely liability looks like.

Estimate your liability with our UAE Corporate Tax Calculator, or book a consultation and we will tell you honestly whether you are ready for 30 September.

This article is general guidance on UAE Corporate Tax and is not a substitute for advice on your specific circumstances. Deadlines and penalties differ by financial year and entity type — confirm your own position with the Federal Tax Authority or a qualified advisor.