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Currency and non-OMR invoices

Currency — OMR (3 Decimal Places)​

Oman uses the Omani Rial (OMR) which has 3 decimal places — unlike EUR/USD which have 2.

<!-- All amounts use 3 decimal places -->
<cbc:TaxAmount currencyID="OMR">50.000</cbc:TaxAmount>
<cbc:TaxInclusiveAmount currencyID="OMR">1050.000</cbc:TaxInclusiveAmount>
<cbc:PayableAmount currencyID="OMR">1050.000</cbc:PayableAmount>
3 Decimal Places

Always use 3 decimal places for OMR amounts (e.g., 1050.000, not 1050.00). This applies to all monetary fields in the invoice including line items, tax amounts, and totals.

IBR-034-OM — non-OMR invoices​

If the invoice currency (IBT-005) is not OMR, the VAT accounting currency (IBT-006) MUST be present.

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