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Fatal — invoice rejected VAT categories & rates UAE-specific rule PINT-AE 2026.5

How to fix ibr-145-ae in UAE e-invoicing

What is ibr-145-ae?

ibr-145-ae is a fatal validation rule in the UAE's Peppol PINT-AE e-invoicing specification — one of the UAE-specific rules. It is checked against each invoice line and belongs to the VAT categories & rates rule group. An e-invoice that fails ibr-145-ae is rejected by the Accredited Service Provider gateway before it reaches the FTA.

What the official rule says

Each Invoice line (IBG-25) MUST be categorized with an Invoiced item VAT category code (IBT-151).
UAE impact: this is a fatal rule specific to the UAE PINT-AE profile — an invoice failing it is rejected at the Accredited Service Provider gateway before it ever reaches the FTA. A rejected invoice means resubmission delays, and late transmission risks the AED 100-per-invoice penalty under Cabinet Decision No. 106 of 2025.

Where it applies

This rule is checked against each invoice line of your UBL 2.1 invoice: 

cac:InvoiceLine | cac:CreditNoteLine

Business terms referenced

Term ID Field Other rules
IBG-25 Invoice line view →
IBT-151 Invoiced item VAT category code view →

Field names are derived automatically from the official rule corpus.

Why this happens

Every single invoice line must carry a VAT category code (IBT-151) — Standard rated, Zero rated, Exempt, Reverse charge, Not subject to VAT, etc. Lines that omit the ClassifiedTaxCategory block entirely are fatally rejected.

How to fix it

1. In each InvoiceLine's Item, add a ClassifiedTaxCategory with the correct category ID and percentage. 2. Make sure your billing system assigns a tax category to every product/service, including zero-rated and exempt items.

Compliant XML

<cac:ClassifiedTaxCategory>
  <cbc:ID>S</cbc:ID>
  <cbc:Percent>5</cbc:Percent>
  <cac:TaxScheme><cbc:ID>VAT</cbc:ID></cac:TaxScheme>
</cac:ClassifiedTaxCategory>
Technical test condition (Schematron) 
(cac:Item/cac:ClassifiedTaxCategory)

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Related rules

ibr-021 Each Invoice line (ibg-25) MUST have an Invoice line identifier (ibt-126). ibr-022 Each Invoice line (ibg-25) MUST have an invoiced quantity (ibt-129).. ibr-023 An Invoice line (ibg-25) MUST have an Invoiced quantity unit of measure code (ibt-130). ibr-024 Each Invoice line (ibg-25) MUST have an Invoice line net amount (ibt-131). ibr-025 Each Invoice line (ibg-25) MUST contain the Item name (ibt-153). ibr-026 Each Invoice line (ibg-25) MUST contain the Item net price (ibt-146). ibr-027 The Item net price (ibt-146) MUST NOT be negative. ibr-028 The Item gross price (ibt-148) MUST NOT be negative.

Rule text sourced from the official OpenPeppol PINT-AE validation artifacts (version 2026.5), refreshed weekly. Explanations are qmetrics' own guidance, not official FTA/MoF text.