The FTA has never published an official list of automatic Corporate Tax audit triggers, but its enforcement approach is risk based, not random. A short, predictable set of filing mistakes is what draws scrutiny: a revenue mismatch between VAT and Corporate Tax filings, claiming Small Business Relief without checking the previous year’s revenue too, related party transactions with no transfer pricing disclosure behind them, filing without the audited financial statements the law actually requires, breaching a Qualifying Free Zone Person condition, which costs five tax periods of the 0 percent rate rather than one, and finding your own error late instead of correcting it through a Voluntary Disclosure before the FTA gets there first.
We see the same handful of mistakes come up every filing season, and this one matters more than most. Calendar year businesses have their FY2025 Corporate Tax return due on 30 September 2026, and the errors below are the ones that turn an otherwise routine return into a flagged one. This is not a piece about what happens once you have already been selected for an audit. We cover that separately in our guide to what to expect during a corporate tax audit. This one is about what to check before you file, so you never end up needing that guide in the first place.
1. Your VAT revenue and your Corporate Tax revenue do not match
This is the most common reason a return gets a second look, and it is also one of the easiest to get ahead of. VAT and Corporate Tax both sit on the same FTA system, and part of the FTA’s risk based review approach compares the turnover already reported on VAT returns against the revenue figure on the Corporate Tax return. A gap between the two is not automatically an error. Timing differences, credit notes, and transactions treated differently for VAT purposes than for accounting purposes all create legitimate, explainable gaps. What matters is being able to explain the gap on request, not eliminating it entirely.
Before you file, pull your last four VAT returns for the period and add up the reported turnover. Reconcile that figure against the revenue you are about to enter on the Corporate Tax return, and note the reason for any gap before you file, not after someone asks about it.
| If VAT and Corporate Tax revenue differ, check | What usually explains it |
|---|---|
| Period cut-off | Invoices or accruals recognised in a different reporting period for one tax than the other |
| Credit notes and adjustments | Posted for VAT in a different period than the matching accounting adjustment |
| Reporting basis | VAT reflects taxable supplies, while the financial statements present the same transaction differently |
| Entity perimeter | Whether you are comparing the same legal entity, particularly relevant if a VAT Group is involved |
A documented, explainable gap is a non issue. An unexplained one is not, and it is far cheaper to understand it now than to explain it under time pressure later.
2. Claiming Small Business Relief without checking last year’s revenue too
Small Business Relief lets eligible businesses elect to be treated as having no taxable income, provided revenue stays at or below AED 3,000,000. The mistake we see most often is businesses checking only the current period’s revenue and assuming that is enough.
It is not. Under Ministerial Decision No. 73 of 2023, the AED 3,000,000 threshold has to be met in the current tax period and in every previous tax period being looked back on. A business that earns AED 1.9 million this year but earned AED 4.3 million the year before does not qualify, even though this year’s number is comfortably under the limit. That look back mechanic is easily missed under deadline pressure, and claiming the relief when you do not actually qualify is one of the clearest audit triggers there is.
The election is also made fresh for each tax period, and Small Business Relief does not remove the obligation to file. Eligible businesses still have to submit a simplified Corporate Tax Return by the deadline, even when the outcome is zero tax due.
Small Business Relief has also just been extended, with Ministerial Decision No. 131 of 2026 pushing eligibility through to 2029. More businesses will be electing into it going forward, so the look back check is one to run every year, not just once.
3. Related party transactions with no transfer pricing support behind them
Transfer pricing rules apply once related parties are involved, and the definition is wider than most people expect. Two natural persons already count as related parties if they sit within the fourth degree of kinship, a reach that goes well beyond a spouse and children.
Between a person and a company, or between two companies, the test under Article 35 of the Corporate Tax Law is ownership or control of 50 percent or more. Control itself is broader than ownership. It also covers voting rights, board composition, profit entitlement, or the ability to exercise significant influence over how the business is run. That is a different, lower threshold than the 95 percent ownership needed to actually form a Tax Group.
The return itself sets specific thresholds for how much of this needs to be disclosed. A Related Party Schedule is only required once aggregate related party transactions exceed AED 40,000,000 in value. Above that figure, individual categories, such as sale of goods, services, or intellectual property, only need separate disclosure once that category itself exceeds AED 4,000,000. Transactions with connected persons sit on a completely separate schedule, triggered once the aggregate value passes AED 500,000.
None of this removes the underlying requirement. Related party pricing still has to be at arm’s length regardless of any disclosure threshold. But a lot of businesses disclose more, or less, than they actually need to, because nobody has checked where these numbers sit. The FTA’s own Corporate Tax Returns Guide sets them out directly.
If related party transactions are a regular part of how your business operates, have your pricing benchmarked properly rather than assuming it will not come up. Our transfer pricing benchmarking service exists specifically for this.
4. Filing without the audited financial statements the law requires
Ministerial Decision No. 84 of 2025 replaced the earlier 2023 rules on this and tightened who actually needs audited accounts. It applies to tax periods commencing on or after 1 January 2025. If your accounting period does not run on a calendar year, check carefully whether your tax period started before that date, since Ministerial Decision No. 82 of 2023 still applies to earlier periods.
Two groups need to pay close attention under the current rules. Any taxable person that is not part of a Tax Group and whose revenue exceeds AED 50,000,000 in the relevant tax period must prepare audited financial statements. Every Qualifying Free Zone Person needs audited financial statements regardless of revenue. Tax Groups have their own requirement too, needing audited special purpose financial statements covering the group, also regardless of revenue.
The mistake we see is a Qualifying Free Zone Person filing and claiming the 0 percent rate on qualifying income while sitting on unaudited accounts, sometimes because the business genuinely did not realise the QFZP requirement has no revenue floor. That is an easy one for the FTA to catch, because the return itself states the QFZP election, and the supporting documentation either exists or it does not.
5. Interest and loss adjustments left off the return entirely
Two specific rules on interest and losses get missed often enough that they deserve their own explanation.
Net interest expenditure is only restricted once it passes AED 12,000,000 in a tax period, under Article 30 of the Corporate Tax Law and Ministerial Decision No. 126 of 2023. Below that figure, this limitation does not apply. Once it does apply, the deduction is capped at the greater of AED 12,000,000 or 30 percent of adjusted EBITDA.
Staying under AED 12,000,000 does not mean every dirham of interest is automatically deductible, though. A separate rule, the Specific Interest Deduction Limitation under Article 31, can still block interest on a loan from a related party if that loan funded a dividend, a share buyback, a capital reduction, a capital contribution to the related party, or the purchase of a related party, regardless of amount, unless the business can show the loan was not taken out mainly to gain a tax advantage.
For most small and mid sized businesses without related party financing, neither rule ends up mattering in practice. It matters most for businesses carrying significant debt or intercompany loans, and the mistake we see is checking only the 30 percent EBITDA test and missing the AED 12,000,000 threshold, or missing the related party rule entirely because the general one was never breached. The FTA’s Interest Deduction Limitation Rules guide walks through both with worked examples.
Separately, under Article 37, carried forward tax losses can only offset up to 75 percent of that year’s taxable income. That leaves at least 25 percent of the year’s taxable income still subject to tax rates, though depending on the amount, that remaining 25 percent can still fall within the 0 percent band below AED 375,000. Tax is not guaranteed to be due, but a large loss balance does not mean nothing is owed either. That assumption is where mistakes creep in.
A return that nets these figures off without applying the correct thresholds is not a minor rounding issue. It is an incorrect tax return, and Cabinet Decision No. 75 of 2023 treats it exactly that way.
6. Free zone status claimed without checking the conditions still hold
Qualifying for the 0 percent Free Zone rate is not a one time setup decision, and the consequence of getting it wrong is bigger than most businesses expect. It depends on maintaining real substance in the UAE, earning genuinely qualifying income, staying within the related party pricing rules, and keeping non qualifying income under the de minimis limit of 5 percent of total revenue or AED 5,000,000, whichever is lower. The current rules sit in Ministerial Decision No. 229 of 2025, which replaced the earlier Ministerial Decision No. 265 of 2023.
Breach any one of these conditions in a given tax period, and it does not stop at that period. The entity ceases to be a Qualifying Free Zone Person from the start of that tax period and for the four tax periods that follow it, five periods in total, and is subject to the ordinary Corporate Tax rules and rates rather than the QFZP regime across all of them. Correcting the underlying issue the following year does not shorten this. A free zone business that trips the de minimis threshold by a small margin in one year is not looking at a one year correction. It is looking at five years outside the QFZP regime on income that would otherwise have qualified for 0 percent.
Businesses that set up correctly as a QFZP sometimes assume that status, once granted, simply carries forward on its own. It does not. Every condition has to hold again, for the current period, every time a return is filed.
7. Finding your own mistake late, and not fixing it the right way
A lot of guidance available online, including some of our competitors’ own content, gets this next part wrong. Corporate Tax administrative penalties are still governed by Cabinet Decision No. 75 of 2023, as amended by Cabinet Decision No. 10 of 2024. The separate reform introduced by Cabinet Decision No. 129 of 2025, effective 14 April 2026, harmonised VAT and Excise Tax penalties. It did not replace the Corporate Tax penalty schedule, which stayed exactly where it was.
Under that schedule, correcting an error yourself through a Voluntary Disclosure, submitted before the FTA notifies you of an audit, costs 1 percent per month on the tax difference, calculated from the original due date. The same error, if the FTA finds it first during an audit, costs a fixed 15 percent plus that same 1 percent monthly charge. The gap between those two outcomes is deliberate. It rewards businesses that correct their own mistakes rather than wait to be caught.
Not every error needs the full Voluntary Disclosure process, though. The FTA’s Corporate Tax Returns Guide draws a specific line: where an error, or the combined effect of more than one error, understated tax payable in a prior return by AED 10,000 or less, it can be corrected as an adjustment in whichever comes first, the next tax return that is not yet due for submission, or the tax return for the period in which the error was discovered. No separate disclosure filing is needed for that. Above AED 10,000, the correction has to go through a full Voluntary Disclosure instead.
| Error found in a previous return | What to do |
|---|---|
| Understated tax payable by AED 10,000 or less, single error or combined | Correct it in the next return not yet due, or the return for the period you found it in, whichever comes first |
| Understated tax payable by more than AED 10,000 | File a Voluntary Disclosure |
If you already suspect there is an error sitting in a return you have filed, working out which row you are in is the first step. For the complete penalty schedule, our corporate tax penalties guide covers every figure in full.
8. Filing a nil return incorrectly, or not filing one at all
Every taxable person registered for Corporate Tax has to file a return, including businesses paying 0 percent under Small Business Relief and businesses with genuinely no taxable income for the period. There is no category of registered business that gets to skip filing on the basis that there is nothing to report. If you are unsure how a nil filing actually works in practice, we have covered it in detail in our guide on whether UAE businesses still need to file a nil Corporate Tax return.
9. Why 2026 raises the stakes on all of this
Federal Decree-Law No. 17 of 2025 came into effect on 1 January 2026 and rewrote how long the FTA has to come back and look at a return. The standard rule stays the same, five years from the end of the relevant tax period, for ordinary filing mistakes. What changed is the exception. Where tax evasion or a failure to register is involved, the FTA can now go back as far as 15 years, confirmed directly in the Ministry of Finance’s own announcement on the amended Tax Procedures Law. That extended window applies specifically to those two categories, not to ordinary errors generally. But it does mean the two most serious kinds of non-compliance no longer age out on the old five year clock. Getting flagged for either one now carries a much longer tail than it used to.
What to keep on file behind every figure on your return
A return that looks complete on the surface is not the same as a return you can actually defend two years later. For every material adjustment or disclosure on your Corporate Tax return, you should be able to trace it back through your financial statements, your ledger, and the specific rule that supports it.
For any material figure, you should be able to answer:
- Which ledger account it came from
- Why it was treated the way it was for tax purposes
- Who approved the related party pricing behind it, if one applies
- Why it differs from the equivalent VAT figure, if it does
- Which calculation supports any Small Business Relief or QFZP position taken
Keeping these threads organised as you file, rather than trying to reconstruct them from memory if the FTA ever asks, is the single biggest difference between a return that survives scrutiny comfortably and one that does not. Records supporting all of this need to be kept for a minimum of seven years regardless.
Before you file, check
- You can explain any difference between your VAT and Corporate Tax revenue figures
- You tested Small Business Relief eligibility against every previous relevant tax period, not just this one
- You checked whether the AED 40 million related party schedule, or the AED 500,000 connected persons schedule, applies to you
- You confirmed your QFZP conditions actually held for the whole period, not just at setup
- You applied the AED 12 million interest threshold and the 75 percent loss offset cap correctly
- You know whether an error found late needs a current period adjustment or a full Voluntary Disclosure
- You can trace every material tax adjustment back to the ledger, the supporting document, and the rule that allows it
Get Your Return Checked Before You File
If any of the points above sound like they apply to your business, get your return checked before 30 September rather than after. Our corporate tax filing team reviews returns against exactly these points, and our corporate tax calculator is a useful starting check if you want a quick read on where your numbers stand before a full review.
FAQs
What actually triggers a Corporate Tax audit in the UAE?
Is the 15 percent penalty for Corporate Tax the same as the new VAT penalty under Cabinet Decision No. 129 of 2025?
What happens if my business fails a QFZP condition?
Do I need to file a Voluntary Disclosure for every error I find in an old return?
Do I need audited financial statements to file my Corporate Tax return?
Does the FTA still have five years to audit my return?
