An identifier for a project, contract, or framework agreement that this invoice relates to. Used to link invoices to specific projects for cost tracking, procurement processes, or contract management purposes.
Essential for organizations managing multiple projects or contracts. Enables proper cost allocation, budget tracking, and financial reporting by project. Particularly important in public procurement where projects must be tracked for compliance and audit purposes.
Optional according to EN 16931-1. However, may be required by specific procurement regulations or organizational policies for project-based invoicing and cost center allocation.
/Invoice/cac:ProjectReference/cbc:ID/rsm:CrossIndustryInvoice/rsm:SupplyChainTradeTransaction/ram:ApplicableHeaderTradeAgreement/ram:SpecifiedProcuringProject/ram:IDPROJECT-2024-001PROJ-EU-DIGITAL-2024INFRA-BER-001IT-MODERNIZATION-2024BUILD-SCHOOL-MUNICH-23AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA✗ InvalidPROJECT WITH/SPECIAL\CHARS✗ InvalidPROJECT|INVALID*CHARS✗ InvalidUse BT-11 when invoicing for work related to a specific project, contract, or framework agreement. This helps the buyer allocate costs correctly and track project expenses.
BT-11 references the broader project or contract, while BT-13 references the specific purchase order. One project may have multiple purchase orders, but all related invoices share the same project reference.
BT-11 is optional according to EN 16931-1. However, German public authorities may require it for specific procurement projects or framework contracts. Check the tender documents or contract terms.
Use the project identifier specified by the buyer or agreed upon in the contract. If no specific format is required, you can use your internal project codes, but ensure they are meaningful to the buyer.
Both can be provided when applicable. BT-11 typically references a broader project or program, while BT-12 references the specific contract. Use both when the project spans multiple contracts.
No specific format is mandated by XRechnung. Use the format specified by the buyer or follow organizational conventions. Common formats include alphanumeric codes with hyphens or underscores.
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