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VAT has been in the UAE since January 2018. That’s over 8 years. And yet, VAT errors remain one of the most common reasons the FTA issues penalties.

The truth? Most businesses aren’t making these mistakes intentionally. They’re making them because VAT is more complex than it looks — and because the rules keep evolving.

Here are the 10 most costly VAT mistakes UAE businesses make — and what to do about each one.

Mistake #1: Not Registering on Time

If your taxable supplies exceed AED 375,000 in any 12-month period, you must register for VAT. Exceeding the voluntary threshold of AED 187,500? You can register — and sometimes should.

Penalty for late registration: AED 20,000
Plus backdated VAT liability on all taxable supplies from when you should have registered.

Fix: Monitor your revenue monthly. Set a calendar reminder when you’re approaching AED 300,000.

Mistake #2: Wrong Tax Treatment on Zero-Rated Supplies

Many businesses confuse zero-rated (0% VAT charged) with exempt (no VAT at all). The difference is critical:

• Zero-rated: You charge 0% VAT but CAN recover input VAT
• Exempt: You charge no VAT and CANNOT recover input VAT

Common zero-rated supplies: exports of goods, international transport, first supply of residential buildings, certain healthcare and education services.

Fix: Classify every supply correctly. When in doubt, get a ruling from the FTA.

Mistake #3: Missing the Input VAT Recovery Deadline

As of 2026, there is a hard 5-year deadline to claim input VAT. Credits from 2020-2021 are expiring NOW.

Fix: Pull your VAT returns from 2020 and 2021. Identify any unclaimed input VAT. File a refund application immediately.

Mistake #4: Claiming Input VAT on Blocked Items

Certain expenses are specifically blocked from input VAT recovery:

• Motor vehicles used for personal purposes
• Entertainment expenses (restaurants, hotels, events for non-employees)
• Any expense used for exempt activities

Fix: Review your input VAT claims. Remove blocked items entirely.

Mistake #5: Incorrect Invoice Format

A tax invoice in the UAE must contain specific mandatory fields. Missing even one makes it invalid for VAT recovery purposes.

Required fields: The words “Tax Invoice”, Supplier name/address/TRN, Customer name/address/TRN (if B2B above AED 10,000), unique sequential invoice number, date of supply and date of invoice, description of goods/services, unit price/quantity/discount, tax rate and tax amount, total amount payable.

Fix: Use accounting software that generates FTA-compliant invoices automatically.

Mistake #6: Filing Returns with Incorrect Periods

Most businesses file quarterly. Some file monthly (if turnover > AED 150M). Getting this wrong creates mismatches the FTA will flag.

Fix: Confirm your filing frequency in EmaraTax. Set reminders: return due 28 days after period end.

Mistake #7: Not Accounting for Reverse Charge Mechanism

If you import services from abroad (software subscriptions, consulting, marketing services), you must self-account for VAT under the reverse charge mechanism.

Fix: Review all overseas service payments. If VAT wasn’t charged by the supplier, you likely need to account for it yourself.

Mistake #8: Treating Intercompany Transactions Incorrectly

If your group is not in a VAT group, transactions between related entities are taxable supplies. Forgetting to charge VAT on intercompany services can trigger assessments.

Fix: Consider forming a VAT group if you have multiple related entities.

Mistake #9: Not Keeping Records for 5 Years

The FTA can audit any VAT period within 5 years. You must keep all tax invoices, import/export documents, VAT return workings, bank statements, and contracts.

Fix: Digitise everything. Use cloud accounting software. Do NOT delete old files.

Mistake #10: Treating the VAT Return as a Formality

The most dangerous mistake of all. Before filing, reconcile: Output VAT per return vs. per your accounting system, Input VAT per return vs. supplier invoices, Revenue per VAT return vs. per financial statements.

Need help reviewing your VAT position? Contact FSH Financial Consultants at info@fshconsultants.com — we specialise in UAE VAT compliance and FTA audit support.