Every conversation about FTA Decision No. 13 of 2026 eventually arrives at the same question: what actually happens if we don't do this? The answer sits in Article 54 bis of the UAE VAT Law — three clauses that together define when an input tax deduction can be refused, and that give the Decision its legal force.
Article 54 bis was inserted into Federal Decree-Law No. 8 of 2017 by Federal Decree-Law No. 16 of 2025, with effect from 1 January 2026. Understanding how its clauses interact is the foundation for every scoping, budgeting and design decision that follows.
Clause 1: Actual Knowledge
Where it is established that a supply formed part of a supply, or chain of supplies, related to Tax Evasion, and the Taxable Person was aware of that relation when deducting, the Authority shall reject the input tax deduction. This is the mandatory limb: proven actual knowledge leaves no discretion, and no verification procedure can cure it. A business that knew what it was buying into has no file-based defence, in the UAE or anywhere else.
Clause 2: Constructive Knowledge
Where the supply formed part of such a chain and the Taxable Person should, based on the circumstances of the supply, have been aware of that relation, the Authority may reject the deduction. Two things are worth noticing in the drafting. The test is anchored to the circumstances of the supply — the facts of the actual transaction. And the clause is permissive: even where constructive knowledge is established, refusal is a matter for the Authority's discretion rather than an automatic outcome.
Practitioners who have worked in mature VAT systems will recognise this immediately. It is the same "knew or should have known" standard that the Court of Justice of the European Union articulated in Kittel in 2006 and that the UK Court of Appeal applied in Mobilx in 2010. The UAE has adopted a standard with two decades of international jurisprudence behind it.
Clause 3: The Deeming Rule — Where Decision 13 Gets Its Force
Clause 3 is the provision that converts Decision 13 from guidance into specification. For the purposes of Clause 2, a Taxable Person shall be considered to have been required to be aware that a supply was part of an evasion-related chain if he did not verify the validity and integrity of the supplies he receives before deduction of input tax, in accordance with the measures, procedures and conditions determined by the Authority.
Those measures, procedures and conditions are what FTA Decision No. 13 of 2026 prescribes, with effect from 1 October 2026.
The consequence of the structure deserves to be stated plainly. A Taxable Person who performs and documents the prescribed verification keeps the constructive-knowledge question open and evidence-based — if a challenge ever comes, it will be assessed on the actual circumstances of the supply, with the evidential record the business built at the time. A Taxable Person who did not perform the verification loses that ground by operation of law: the knowledge element is deemed, and what remains is the Authority's discretion.
What the Authority Must Still Establish
The deeming rule addresses the knowledge element. It does not deem the underlying fact. In every case, it must first be established that the supply formed part of a supply or chain of supplies related to Tax Evasion. A business whose suppliers are all genuine faces no consequence under Article 54 bis, whatever the state of its paperwork.
That sounds like comfort, and it is worth being precise about why it is limited comfort. Whether a supplier — or an entity several tiers up the chain that you never dealt with — was connected to evasion is a fact typically identified by the Authority through its own data and enquiries, often years after the transaction. No enterprise can forecast, supplier by supplier, where that finding will land. The only coherent response is to apply the prescribed verification across the whole in-scope population, which is why Article 54 bis converts a contingent legal risk into a standing operating requirement.
Why This Design Helps the Prepared Taxpayer
It is worth crediting the clarity of the UAE's approach. In the UK, HMRC has deliberately declined for two decades to publish a definitive due diligence checklist, reasoning that a fixed list could be satisfied mechanically by those minded to look away. The cost of that flexibility is uncertainty: an honest UK trader learns whether its checks were "appropriate and proportionate" only after the event. The UAE has taken the other route — a defined specification with a defined consequence — which tells every taxable person exactly what is expected of it, in advance. For a business willing to build the capability, that is a materially more navigable position.
The work, of course, is in the building: knowing which suppliers and supplies are in scope, performing the measures at the right moments, and producing evidence that will still stand up years later. That is a design problem spanning tax, data, process and governance — not a checklist.
How Contiqa Can Help
Contiqa Systems helps UAE businesses translate Article 54 bis and Decision 13 into an operating reality: scoping the in-scope population, settling the interpretive positions the text leaves open, and designing verification and evidence capture into the processes where the facts actually live. Contact Contiqa Systems to discuss what the deeming rule means for your input tax position before the 1 October 2026 effective date.
Track how UAE businesses are responding to this Decision as it takes effect — visit the Decision 13 Tracker on this site.
This article is general commentary on published legislation (working from the unofficial English translation) and does not constitute tax or legal advice. Obtain advice on your specific circumstances before acting.