What is a TRN in the UAE?
A TRN, or Tax Registration Number, is the 15-digit number issued by the UAE Federal Tax Authority to identify a person registered for VAT. It must appear on every tax invoice and credit note the registrant issues, and a customer’s entitlement to recover input VAT depends on holding a valid tax invoice showing the correct TRN.
Not a trade licence number
A TRN is issued by the Federal Tax Authority for tax purposes; a trade licence number is issued by a licensing authority for the right to do business. They are routinely confused and are not interchangeable.
Where it must appear
On your tax invoices and credit notes always, and the recipient’s TRN where they are registered and will be recovering the tax.
Tax groups
Related entities under common control may register as a single tax group sharing one TRN, in which case supplies between members fall outside VAT.
Why verification is worth the minute
If the TRN on your invoice is wrong, your customer’s input recovery can be challenged — and the conversation about fixing it comes to you, often a year later during their audit.
Related questions
How many digits is a TRN?
Fifteen. A simple format check when you save a party catches most transcription errors immediately.
Is a TRN the same as a trade licence number?
No. Different authorities, different purposes. The TRN comes from the Federal Tax Authority and relates to VAT registration.
Can several companies share a TRN?
Yes, where they are registered as a tax group under common control. Supplies between members of the group are then outside the scope of VAT.
More definitions
Validate the TRN at party setup
tBiz checks the format when you save a customer, not when you are mid-invoice.