E-invoicing compliance and regulatory updates - Greece

Electronic Invoicing in Greece

Is e-invoicing mandatory in Greece ?

E-invoicing is mandatory for B2G-invoices, by clearing invoices with the myDATA platform and then delivering them using the Peppol network handled by KE.D.

A B2B e-invoicing mandate has been announced, with planned go-live during 2026.

Who is affected?

In the B2G scenario, all suppliers issuing invoices to the Greek public sector are affected.

Compliance requirements

For B2G transactions, suppliers must send structured e-invoices through certified providers using the Peppol network, after having cleared the invoice using the myDATA platform.

With a phased implementation stating February 2026, e-invoicing will become mandatory for B2B invoices.

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Key Deadlines 

• 2026-02-02: Mandatory e-invoicing for Large taxpayers (€1+ million turnover)
• October 2026: All other taxpayers

Standards & Platforms

Platform

Current rules requires supplier clearance of invoices with the myDATA platform. The upcoming 2026 B2B-mandate’s platform/structure has not yet been defined.

What formats are required in Greece?

For B2G transactions, electronic invoices must follow the European norm EN16931 and comply with Peppol BIS format.

For B2B transactions currently, invoices must be cleared with the myDATA platform in XML format. After clearance, the invoices are sent using bilateral agreement from the supplier to the buyer.

Archiving in Greece

What are the archiving requirements in Greece?

The standard archiving period is six years, starting from the end of the year in which the tax return submission deadline expires. Archiving does not need to be digital – paper is acceptable. However, legibility and data integrity must be preserved, ensuring both the authenticity of origin and content integrity. Archiving abroad is acceptable, provided certain requirements are met.

Legal invoice

For suppliers: A legal invoice is the structured e-invoice submitted through a certified provider via the Peppol network (B2G) or cleared with the my DATA platform (B2B).

For buyers: A legal invoice is the invoice received through the Peppol network (B2G) or reported to the my DATA system by the supplier (B2B).

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Key Actions  

• Ensure compliance: Send structured e-invoices via certified providers and Peppol for B2G transactions. For B2B, clear invoices through the myDATA platform.
• Archive invoices: Retain invoice records for six years in a format that ensures readability, authenticity, and integrity. Both digital and paper formats are allowed.

Greek e-invoicing and archiving requirements at a glance:

Supplier requirement: Greek suppliers must issue e-invoices through certified service providers. B2B suppliers must transmit invoices to the myDATA platform and include the unique identifiers assigned by myDATA before sending the invoice to the buyer.

Buyer requirement: Greek buyers must be able to receive e-invoices and confirm that the necessary unique identifiers are included.

Archiving requirement: Invoices must be stored for 6 years in a legible and authentic format. Both digital and paper formats are acceptable.