Most exporters believe zero-rating is lost at the border. In my experience, it is lost the day the advance hits the bank.
Here is my position: 0% on exports is not a status. It is a position you defend with documents, on a clock.
An advance triggers the date of supply (Articles 25–26, Federal Decree-Law 8 of 2017). From that day, Article 30 of the Executive Regulations (Cabinet Decision 52 of 2017) gives you 90 days to physically export the goods and to hold both official and commercial evidence — supplier, consignor, goods, value, destination, transport, route.
Miss the window without an FTA extension, and the supply is charged at the standard 5% — out of your own margin, because the customer already paid you a VAT-free price.
Where owners get hurt is not ignorance of the rule. It is the calendar. Production delays, vessel schedules, a customs hold: the clock does not care. Yet I rarely see a deadline diary kept per advance, and the evidence pack is usually assembled only after someone asks for it.
If the FTA asked you today, could you defend every zero-rated advance on your last return?
A version of this post was first shared on LinkedIn. Names and figures are anonymised. This is general information, not advice for your business.