BT-134

Invoice line period start date

BT-134 (Invoice line period start date) is a business term of EN 16931, the European e-invoicing standard. This page shows where the field lives in a UBL invoice, how often it may appear and which validation rules check it.

Start of the line's period.

Group: BG-26 (Invoice line period)

Cardinality: 0..1

UBL element: cac:InvoiceLine/cac:InvoicePeriod/cbc:StartDate

Example value: 2026-07-01

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