The corporate tax errors that cause real problems are rarely aggressive technical positions. They are ordinary mistakes — estimates never revisited, adjustments never supported, elections never tested — made by people preparing a return from records that had not been closed. Which means most of them are caught by four checks before submission.
The root cause of corporate tax return errors
Almost every error in this article is downstream of the same thing: the return was prepared from a position that was still moving.
The sequence is familiar. A deadline approaches. The books are three months behind. Someone produces a set of numbers good enough to file, with the intention of correcting anything that turns out to be wrong. The return is submitted. Nobody goes back.
Everything that follows — the revenue that does not agree to the VAT returns, the adjustment nobody can explain eighteen months later, the relief claimed on a revenue figure that was an estimate — flows from that. It is a process failure that presents as a series of technical ones.
The fix is not better tax knowledge. It is closing the books monthly so that at filing time you are reporting a finished position rather than assembling one.
Revenue that does not agree with anything else
The most consequential error because it is the easiest for the FTA to detect. Revenue in the corporate tax return should reconcile to revenue in the audited accounts and to turnover in the VAT returns, with differences explained.
Where it does not, the usual causes are: revenue recognised on a different basis in each system, a period-end cut-off applied inconsistently, intercompany recharges included in one and not the other, or simply that the tax return was prepared from management accounts that were later adjusted by the auditor and never fed back.
That last one is worth dwelling on. A company files its return in month nine using draft figures, the audit completes in month eleven with adjustments, and nobody revisits the return. The audited accounts and the filed return now permanently disagree, and both are sitting with the same authority.
The check: reconcile all three, in writing, before you file. We set out the mechanics in reconciling VAT turnover to corporate tax revenue.
Adjustments with no documented basis
Taxable income is accounting profit plus and minus a set of adjustments. Every one of those adjustments should have a reason someone wrote down at the time.
Where we find gaps:
- Disallowable expenses not added back — entertainment beyond the permitted proportion, fines and penalties, certain donations.
- Depreciation and amortisation treated inconsistently between the accounts and the computation.
- Provisions deducted before they meet the conditions for deduction.
- Interest, where limitation rules apply and have not been considered.
- Unrealised gains and losses, where the treatment depends on an election that was never formally made.
- Prior year adjustments pushed through without explanation.
The problem is rarely that the adjustment was wrong. It is that eighteen months later nobody can say why it was made, and an unexplained adjustment is an invitation.
Keep a computation schedule showing each adjustment, the amount, and one line on the basis. It is a single document and it answers most questions before they are asked.
Elections claimed but not tested
The reliefs and elections in the UAE regime are conditional, and the conditions are tested on the facts of each period rather than granted once.
Small Business Relief. The revenue test applies per period. Exceed the threshold and eligibility is lost — and the rules are structured so that this has consequences beyond the single year. Companies claim on an approximate revenue figure and discover later that the audited number was over the line. Ministerial Decision No. 131 of 2026 extended the relief to periods ending on or before 31 December 2029, so the end point is further out than previously legislated — but losing it on the revenue test is permanent, which we cover in the guide to the relief.
Qualifying Free Zone Person status. Six cumulative conditions, every period. Substance and the de minimis threshold are where claims most often fail, and the consequence of failure extends beyond the period in question.
Group relief and transfers. Conditional on ownership levels and holding periods that need checking against the actual facts rather than the intended structure.
The check is unglamorous: for each election claimed, write down each condition and how you met it, with the number. If you cannot complete that exercise, you have found your problem before the FTA did.
Related-party transactions treated as internal matters
Transfer pricing applies to UAE companies, not only to multinationals, and it is where SMEs are least prepared.
The transactions that need support are ordinary: rent to a shareholder-owned property, management fees from a parent, interest on a director's loan, goods purchased from a sister company, salaries to family members involved in the business.
The requirement is that pricing reflects what unrelated parties would have agreed, and that you can show your reasoning. For a small company the documentation can be brief — but it must be written at the time, not constructed after a question arrives.
The visible-inconsistency risk deserves emphasis: related-party balances are disclosed in your audited financial statements. If those disclosures have no corresponding treatment in the tax return, the gap is apparent to anyone holding both documents. The FTA holds both.
The four checks before you file
Do these and you will catch the large majority of what goes wrong.
- 1. Revenue agrees. Corporate tax return to audited accounts to VAT returns, with a written reconciliation of differences.
- 2. Every adjustment has a basis. One schedule, one line each, prepared now rather than recalled later.
- 3. Every election is tested. Conditions listed, met, with the numbers that demonstrate it.
- 4. Related parties are covered. Transactions identified, pricing supported, treatment consistent with the disclosures in the accounts.
Together these take a competent person a day for a straightforward company. Set against the cost of an FTA audit or a voluntary disclosure, it is the best-value day in the compliance calendar.
Want the return checked before it goes in?
We review corporate tax computations against the accounts and the VAT position, and tell you what would not survive a question.
Frequently asked questions
Filing from records that were never properly closed. Almost every other error we see is downstream of that one — estimates that were never revisited, adjustments that were never supported, and revenue figures that do not agree with what was reported for VAT. The error is procedural before it is technical.
Errors are corrected through the prescribed mechanism, which depending on the nature and size of the error may be voluntary disclosure or correction through a subsequent return. The route is determined by the rules rather than by preference, so establish which applies before acting.
Whether audited statements are mandatory depends on your circumstances — they are a standing condition for Qualifying Free Zone Person status, and most free zones require them for licence renewal in any case. Practically, filing from audited numbers means filing from a position an independent party has tested, which is a materially stronger place to be if the return is later questioned.
The relief is withdrawn for the period and the tax becomes payable, with penalties on the shortfall. Because the revenue test is applied per period and eligibility is lost permanently once exceeded, an incorrect claim in one year can have consequences beyond that year. Correct it proactively rather than waiting.
Agree revenue to the audited accounts and to the VAT returns. Confirm every adjustment between accounting profit and taxable income has a written basis. Our guide to filing the return sets out the order to work in. Confirm each election meets its conditions on the facts of the period. Check related-party transactions have transfer pricing support. Those four checks catch the large majority of errors.
Related reading: Deductible Expenses Under UAE Corporate Tax.
