Entering 2026, the UAE’s tax landscape has moved from its early “learning phase” to a period of informed digital enforcement. Indeed, the coming into effect of Federal Decree-Law No. 16 of 2025 has introduced several salient changes by the FTA, which require an increased level of diligence on the part of each and every business owner in the Emirates.

At Planners Tax Consultancy, we believe that you should move forward ahead of your tax obligations and not let them weigh you down. To help you keep your operation seamless, we have outlined the most critical VAT mistakes you should watch for this year.

1. Missing the New Five-Year “Expiry Date” on Refunds

One of the most significant shifts in 2026 is the introduction of a strict five-year time limit for reclaiming excess VAT.

• The Mistake: Many businesses traditionally carry forward VAT credits indefinitely.
• The Risk: Under the new rules, if you do not submit a refund request within five years from the end of the relevant tax period, your right to that money expires forever.

Conduct a “VAT Health Check” on your older balances now. You have until December 31, 2026, to claim historical credits from the 2018–2020 period before they are lost.

2. Neglecting Supplier Due Diligence

The FTA now has increased power to deny your Input Tax recovery if a supply is linked to tax evasion—even if you weren’t directly involved.

• The Mistake: Blindly accepting invoices without verifying the supplier’s status.
• The Risk: If you “should have known” something was wrong, the FTA can disallow your tax deduction. You are now responsible for ensuring your partners are compliant.

3. Failure of the “Simplified” Reverse Charge (RCM)

As of early 2026, enterprises are no longer obligated to self-invoice for imported goods and services under the Reverse Charge Mechanism.

The Mistake: Assuming “no self-invoice” means “no record-keeping.”

While the paperwork is reduced, the burden of proof is much greater. You would still be maintaining contracts and customs documents to justify RCM treatment. A professional Vat Consultancy Services in Abu Dhabi ensures your digital records meet these new evidentiary standards.

4. Ignoring the E-Invoicing

The year 2026 sees the national implementation of compulsory e-invoicing.

Continuing to use inefficient, isolated accounting processes or outdated PDF templates.

Inaccurate data results in an automatic fine of AED 5,000 for every document. There is no option but to integrate your billing system with FTA-approved platforms. This is now a matter of survival.

5. Mistakes in Supply Classification

The Zero-Rated and Exempt Supplies difference is still a source of confusion to many people.”The Mistake”: Because neither charges 5%. Treat them differently. The Risk: You can credit Input VAT for zero-rated supplies but not exempt supplies. The consequences of a mistaken ratio are higher refund claims, prompting audit queries and penalties. At our Accounting Services Abu Dhabi, our expertise will get your accounts just right so that you will not be under audit.

Beginning in 2026, VAT becomes more than just a quarterly return. At Planners Tax Consultancy, we are able to oversee your business to shield your cash flow and reputation.