UAE VAT Mistakes and How to Fix Them

A diagnosis-and-repair guide for UAE businesses that file VAT. It is organised by mistake, not by topic: you look up what you think went wrong, see how to confirm it in your records, and follow a correction path or a list of questions for your accountant or the FTA. It is not a VAT primer; one short refresher chapter sets the facts.

What is inside

• 42 pages in 9 chapters covering 43 mistakes: how errors arise and the five questions before you correct anything; registration; tax invoices (missing particulars, TRN errors, late issue, simplified invoice reliance, credit notes, advances); output tax (wrong code or rate, zero-rated versus exempt, free supplies, reverse charge, date of supply); input tax; VAT 201 return boxes; filing and payment; records and systems; and a repair toolkit.
• For every mistake, the same blocks: what it looks like, why it happens, how to spot it, why it matters, the correction path, and prevention.
• More than 30 of the mistakes have a worked example for a made-up company with the wrong figure, the right figure and the difference on the return; 5% arithmetic is recomputed.
• A 25-point month-end VAT review and a decision guide for an error found before filing, after filing, or by the FTA.
• 20 workbook tasks with model answers (Word and PDF): a 25-question VAT health check, an error log with an example, a correction memo template and figure-based exercises.

Facts it states 5% VAT, thresholds of AED 375,000 and AED 187,500, the 30-day application window, the 28th-day deadline, the 14-day tax invoice rule, the simplified invoice change under Cabinet Decision 100 of 2025, the domestic reverse charge categories, and the published e-invoicing timetable (as published; confirm for your business). It never quotes a penalty amount; it names the change of regime under Cabinet Decision 129 of 2025. Where a correction route depends on a rule outside those points, it gives questions for your accountant and a verify callout.

Who it is for Owners, bookkeepers and finance staff of VAT-registered UAE businesses, and anyone preparing to register.

What it is NOT: it is not legal, tax, immigration or accounting advice, it does not tell you what any rule, fee or deadline is for your case, it promises no result, and it leads to no exam or certificate. UAE rules change, so every rule outside a small set of well-established VAT and employment points is sent to the official source or your adviser. All companies and figures are made up. It is not affiliated with or endorsed by any government body, bank or platform.

Requirements: a PDF reader and Word or a compatible editor. Version 1.0, written November 2026. Single business use.