Two September 30 deadlines have now passed, and one pattern stands out. Corporate Tax trouble rarely comes from misreading the law. It comes from execution: taxable income that was never properly bridged from the accounts, returns the records cannot support, and EmaraTax registrations that do not match how the business actually operates.
The FTA set 30 September 2025 for financial years ending 31 December 2024, and 30 September 2026 for the year to 31 December 2025. If you filed for either one, this review shows where filings tend to slip, what a slip costs, and what to fix while the next cycle is still months away.
One caveat first. The FTA has not published a ranked list of the errors that draw scrutiny. What follows combines the Authority’s own statements, the published penalty rules and adviser commentary. Where something is an observation rather than official data, the text says so.
What the first two filing cycles actually showed
Scale came first. In October 2025, the FTA said Corporate Tax registrants had passed 640,000, and it credited most of them with registering and filing within the legal timeframes. That is a large population filing a brand-new return for the first time.
The Authority’s messages around both deadlines were consistent. File within nine months of the end of the Tax Period. Pay within the same window. Keep records that support every figure.
Filing and paying are separate obligations
A return filed on time does not stop late payment charges if the tax arrives late. The FTA has warned that last-minute payments may not be processed before the deadline, in which case they are treated as received late. For a December year-end company, “on time” means cleared funds by 30 September, not a transfer initiated that evening.
Small Business Relief still means filing
Businesses eligible for Small Business Relief must still file using a simplified return. The relief is elective, and the FTA has been clear that it will use the records to verify revenue, taxable income and eligibility. The UAE has since extended the relief period to 2029, which makes getting the election and the evidence right more important, not less.
Lesson 1: Accounting profit is not taxable income
The most common technical gap sits between the financial statements and the tax computation. Accounting profit is the starting point. Several adjustments follow before you reach taxable income.
Advisers point to the same slip points again and again:
- Income treated as exempt when the conditions were not fully met, for example under the participation exemption.
- Deductions claimed without applying limits, such as the entertainment expense cap or the interest deduction limitation
- Tax losses carried forward at the wrong amount.
- Small Business Relief assumed rather than elected, or elected without meeting the conditions.
- IFRS-to-tax reconciliations left incomplete, with figures then mapped into the wrong EmaraTax fields.
Here is a simplified, hypothetical illustration of the bridge. It ignores losses, reliefs and other adjustments, so treat it as a teaching example, not advice.
Step | AED |
|---|---|
Accounting profit | 1,000,000 |
Add: non-deductible expenses | 60,000 |
Less: exempt income (qualifying dividends) | (100,000) |
Taxable income | 960,000 |
First 375,000 at 0% | 0 |
Remaining 585,000 at 9% | 52,650 |
Corporate Tax payable | 52,650 |
File the accounting profit as if it were taxable income, and the same company would compute AED 56,250. Errors cut both ways. Overpaying is still an error, and it ties up cash.
The fix is procedural. Build the tax computation from the final approved financial statements, keep a signed reconciliation, and make sure every figure typed into EmaraTax traces back to it. If your finance team needs a second pair of eyes, our Corporate Tax services cover computation reviews and return preparation.
Lesson 2: A return without evidence is a liability
The FTA has said plainly that records exist so it can verify revenue, taxable income and eligibility for Small Business Relief. Exempt persons carry the same duty for their exemption. A correct number you cannot support is a weak position in any review.
Free zone positions need substance
The 0% rate for a Qualifying Free Zone Person is not automatic because a company sits in a free zone. The entity must register, file, and, from 2025, submit audited financial statements. Advisory firms report that scrutiny is concentrating on free zone qualification and economic substance, transfer pricing documentation, and relief claims.
The rules are also getting more specific. On 2 June 2026, the FTA issued Decision No. 6 of 2026. For tax periods beginning on or after 1 January 2026, a QFZP distributing goods or materials in or from a Designated Zone must obtain an Agreed-Upon Procedures (AUP) report from an independent auditor and submit it within 30 days after the return deadline.
->> Our guide to QFZP audit requirements explains how this fits with the annual audit.
Related-party dealings
Transactions with related parties must follow arm’s length pricing, and advisers list undocumented related-party dealings as a recurring risk. Start with our overview of related party transactions under UAE Corporate Tax and, for groups, the transfer pricing guide.
What does a usable evidence file hold? At minimum:
- Signed contracts and invoices that match the revenue in the return
- Proof of where activity, staff and assets actually sit (for free zone claims)
- Transfer pricing documentation and related-party disclosure support
- Workings for every exemption, relief and election claimed
For a closer read on how the FTA reviews files, see our article on what the FTA is scrutinising in Corporate Tax audits.
Lesson 3: Registration problems surface at filing time
Registration looks like a one-time task. It is not-errors made on EmaraTax during registration travel with the business into every return that follows.
The issues advisers report most often:
- Assuming exemption means no registration. Exempt persons are not automatically excused. Some must register and submit an annual declaration within the same nine-month window.
- Wrong financial year or Tax Period dates. If the dates entered do not match the accounting records, the first return can start from the wrong place.
- Wrong legal person. In group and branch structures, the entity that registers may not be the entity that should.
- Treating VAT registration as Corporate Tax registration. An existing EmaraTax account does not remove the need for a separate Corporate Tax application.
- Missing the QFZP election at registration when the business intends to claim the 0% rate.
The cost is concrete. Late registration carries a fixed AED 10,000 penalty. A Cabinet decision waives it for eligible taxpayers who file their first return within seven months of the end of their first Tax Period. Our note on the late registration penalty waiver covers the conditions.
A filed return cannot simply be edited
There is no button to reopen a submitted Corporate Tax return and rewrite it. Errors found after filing go through a Voluntary Disclosure under Article 10 of the Tax Procedures Law. Acting early matters, because a disclosure made before the FTA raises the issue is treated more favourably than one made after. The recent Tax Procedures Executive Regulations are worth checking for the current mechanics.
What these mistakes cost
Issue | Administrative consequence |
|---|---|
Late Corporate Tax registration | AED 10,000 fixed penalty (waiver available if conditions are met) |
Late return filing | AED 500 per month, or part month, for the first 12 months; AED 1,000 per month from the 13th |
Late payment | 14% per annum on the unpaid tax, calculated monthly |
These charges stack. A business that files late and pays late faces both. Cabinet Decision No. 129 of 2025 took effect on 14 April 2026 and harmonised the VAT and Excise penalty framework. Confirm which decision governs the specific breach before you quote a figure to a client. Our piece on the 2026 tax penalty regime walks through the wider picture.
A 30-day post-deadline review
If your return is already filed, use the next month to test it. A practical order of work:
- Confirm status per TRN and Tax Period. Check that filing and payment both show as complete, and that funds cleared before the deadline.
- Re-perform the taxable income bridge. Tie every EmaraTax field back to the final approved financial statements.
- Audit your registration profile. Check entity type, financial year dates, group or branch set-up, exempt status and any QFZP election.
- Build or refresh the evidence file: contracts, substance records, related-party documents and relief workings, all in one place.
- Decide on a Voluntary Disclosure if you find a mismatch. Do it before the FTA raises it.
- Calendar the next cycle. A 31 December 2026 year-end returns to the same 30 September pattern in 2027, and distribution QFZPs have the extra AUP date to plan for.
Strong accounting underpins all six steps. Our accounting and finance team and external audit service support the financial statements the return depends on.
The takeaway
The first two cycles tested record-keeping and set-up more than they tested knowledge of the rules. Businesses that treated the return as a by-product of clean books and a correct registration filed with confidence. Those that treated it as a form to complete at the deadline are the ones now reviewing their positions.
Frequently Asked Questions
When was the Corporate Tax filing deadline?
Nine months after the end of the Tax Period. For a 31 December 2025 year-end, that was 30 September 2026. For 31 December 2024, it was 30 September 2025.
Do small businesses have to file a Corporate Tax return?
Yes. Businesses eligible for Small Business Relief must still file using a simplified return, and the relief is elective.
What happens if I file on time but pay late?
A late payment charge applies to the unpaid tax at 14% per annum, calculated monthly, even though the return itself was on time.
Can I amend a Corporate Tax return after filing it?
Not by editing it. Corrections go through a Voluntary Disclosure on EmaraTax under the Tax Procedures Law.
Is a free zone company automatically taxed at 0%?
No. The 0% rate applies to the qualifying income of a Qualifying Free Zone Person that meets all conditions. The company must still register and file.
Does an exempt entity need to register?
Some do. Exempt persons who are required to register must submit an annual declaration within nine months of the end of their financial year.
Has the FTA published which errors trigger a review?
Not in the sources reviewed for this article. The FTA has published registrant numbers, deadline reminders and penalty rules. Adviser commentary describes likely risk areas.
Can a tax agent file the return for us?
Yes. The FTA allows a return to be filed by the Taxable Person or by an authorised individual, including a registered tax agent or legal representative.
Next step: ask for a post-filing review
NR Doshi & Partners is an FTA-approved chartered accountancy and business advisory firm, established in 1985, with seven offices across the UAE and DFK International membership. If you want a second opinion on a filed return, a registration check or an evidence-file build, speak to our team through the Tax Agent services page.
For groups with intercompany flows, our transfer pricing services cover documentation and disclosure.
Author:
Written by the NR Doshi & Partners General Advisory team. NR Doshi & Partners is a UAE-based, FTA-approved Audit and business advisory firm, established in 1985, with seven UAE offices and DFK International membership.
