Most UAE businesses filing their second Corporate Tax return assume the hard part is behind them. It isn’t. The mistakes that cause FTA penalties and audit flags in 2026 are rarely new errors – they’re the same assumptions from year one, repeated without a second look. Two things have changed since that first filing, though: the penalty framework and the small business relief window. Getting either wrong this cycle costs more, or less, than businesses expect. Here are the five mistakes we see most often in advisory conversations right now, and what to check before you file again.
1. Treating Small Business Relief as Settled From Last Year
Why It's a Problem
A large number of SMEs elected Small Business Relief under Article 21 of the Corporate Tax Law in their first filing and assumed the same election carries forward automatically. It doesn’t. The relief is elective every year, not a standing status.
There’s also a second, more current trap. Many finance teams still believe the relief expires at the end of 2026, because that was the original sunset date under Ministerial Decision No. 73 of 2023. In August 2026, the Ministry of Finance extended it to tax periods ending on or before 31 December 2029 under Ministerial Decision No. 131 of 2026. Businesses that assume the relief is disappearing sometimes restructure prematurely or abandon the election altogether, losing a benefit that’s still available to them.
The revenue threshold itself hasn’t moved. It remains AED 3 million or less in the relevant tax period for every tax period since 1 June 2023 – and it’s a revenue test, not a profit test. A business with AED 2.8 million in revenue and AED 200,000 in profit still measures against the AED 3 million line, not the profit figure.
How to Fix It
- Re-elect Small Business Relief on the return each year – it is never automatic.
- Confirm your revenue against the cumulative test, not just the current period.
- Check eligibility exclusions: Qualifying Free Zone Persons and entities belonging to a Multinational Enterprise Group with consolidated global revenue above AED 3.15 billion cannot use this relief, regardless of their own revenue.
- Don’t assume the relief window has closed. As of the 2026 extension, it hasn’t.
2. Assuming Free Zone Status Alone Means Zero Tax
Why It's a Problem
This remains one of the most expensive misconceptions in UAE Corporate Tax, and it resurfaces in second filings almost as often as first ones. A Qualifying Free Zone Person (QFZP) benefits from a 0% rate, but only on qualifying income, and only after meeting ongoing conditions. Free zone status is not a blanket exemption, and it doesn’t remove the obligation to register, file annually, and – from 2025 onward – submit audited financial statements.
Businesses that skip registration because they believe free zone status makes tax irrelevant face an AED 10,000 late registration penalty on top of whatever tax and interest are later assessed.
How to Fix It
- Confirm that QFZP status is reassessed every tax period, not locked in once and forgotten.
- Separate qualifying income from non-qualifying income before applying the 0% rate to anything.
- Register with the FTA and file a return regardless of whether tax is ultimately payable.
- Keep audited financial statements current if your free zone entity is required to prepare them.
3. Letting Corporate Tax and VAT Filings Tell Different Stories
Why It's a Problem
The FTA can and does compare VAT filings against Corporate Tax declarations. When reported revenue diverges meaningfully between the two, it’s a natural audit trigger. This mistake tends to compound in a second filing because small reconciliation gaps from year one – a revenue recognition timing difference, a misclassified adjustment – get carried forward instead of corrected, and the discrepancy grows.
How to Fix It
- Reconcile VAT-declared revenue against Corporate Tax taxable income before submission, not after a query arrives.
- Investigate timing differences (accrual versus cash recognition) rather than treating them as errors to paper over.
- Keep one unified set of financial records feeding both filings, instead of separate schedules maintained by different teams.
4. Misclassifying Deductible Expenses
Why It's a Problem
Not every business cost is fully deductible, and the rules aren’t always intuitive. Entertainment expenses, for example, are only 50% deductible under UAE Corporate Tax, yet businesses regularly claim the full amount, especially when the same expense was treated differently for VAT purposes. Personal expenses and certain fines and penalties are non-deductible outright. When these get claimed anyway, it’s rarely deliberate – it’s usually last year’s spreadsheet template, reused without a rules check.
How to Fix It
- Review expense categories against current FTA guidance before applying last year’s classifications automatically.
- Keep personal and business expenses in clearly separated accounts.
- Flag entertainment, client hospitality, and fines-related costs for manual review rather than automatic inclusion.
- Maintain documentation that shows why an expense was treated as deductible, not just that it was.
5. Underestimating the Cost of a Late or Incorrect Filing
Why It's a Problem
This is the mistake that changed most significantly in 2026. Cabinet Decision No. 129 of 2025 took effect on 14 April 2026, replacing the UAE’s older compounding penalty structure with a flat 14% annualised rate, calculated monthly, on outstanding tax across VAT, Excise Tax, and Corporate Tax. In practice, this makes some penalties cheaper, but it also removes any ambiguity about how fast unpaid tax accumulates cost. There is no cap on the interest charge; it continues accruing until the balance is settled.
The reform also reshapes voluntary disclosure. A disclosure filed before an FTA audit notice is now materially cheaper than one filed after – under the current framework, disclosing after an audit notice adds a fixed surcharge on top of the monthly rate. Businesses that discover an error from their first filing and carry it into the second, hoping it goes unnoticed, are choosing the more expensive path by default.
How to Fix It
- If you suspect an error in a prior return, file a voluntary disclosure before the FTA flags it, not after.
- Build filing deadlines into a compliance calendar with buffer time, rather than treating the due date as the start of preparation.
- Understand that the 14% rate applies from 14 April 2026 onward – historic penalty calculations before that date may follow the previous framework.
- Where genuine uncertainty exists about a position taken last year, get it reviewed now rather than repeating it.
Frequently Asked Questions
Is Small Business Relief still available for the 2026 tax period?
Yes. Following Ministerial Decision No. 131 of 2026, issued in August 2026, the relief now applies to tax periods ending on or before 31 December 2029, provided the AED 3 million revenue threshold and other eligibility conditions are met.
Do I need to re-elect Small Business Relief every year?
Yes. The election is not automatic and does not carry forward. It must be made on each year’s Corporate Tax return.
What is the current penalty rate for late Corporate Tax payment?
Since 14 April 2026, under Cabinet Decision No. 129 of 2025, a flat 14% annualised rate applies to outstanding tax, calculated monthly, replacing the earlier compounding penalty structure.
Does free zone status automatically mean 0% Corporate Tax?
No. Only Qualifying Free Zone Persons benefit from the 0% rate, and only on qualifying income. Registration, annual filing, and (from 2025) audited financial statements are still required.
Are entertainment expenses fully deductible under UAE Corporate Tax?
No. Entertainment expenses are generally only 50% deductible, regardless of how they were treated for VAT purposes.
What triggers an FTA audit of a Corporate Tax return?
Common triggers include mismatches between VAT-declared revenue and Corporate Tax taxable income, incomplete related-party documentation, and inconsistent expense classification year over year.
Is it better to file a voluntary disclosure or wait to see if the FTA notices an error?
Filing before an audit notice is consistently the cheaper path under the current penalty framework. Waiting adds a fixed surcharge on top of ongoing interest.
Conclusion
Second filings carry a specific risk: the confidence that comes from having done it once before. That confidence is only useful if the assumptions behind it were correct – and if they’ve kept pace with what’s changed. The Small Business Relief extension and the new 14% penalty regime are both 2026 developments that directly affect how last year’s filing decisions should be revisited this year, not simply repeated.
Author:
Written by the Tax Compliance team at NR Doshi & Partners, a UAE-based, FTA-approved chartered accountancy and business advisory firm established in 1985, advising SME and corporate clients across the UAE on Corporate Tax, VAT, and regulatory compliance.
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