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 deliver them using the Peppol network handled by KE.D.

Electronic invoicing becomes mandatory during 2026 for B2B-invoices.

Who is affected?

In the B2G scenario, all suppliers issuing invoices to the Greek public sector are affected. All invoices are in scope, with some specific exceptions, such as costs below EUR 2500.

For B2B-invoices, all invoices are in scope, except those to businesses in the European Union.

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.

or B2B transactions, suppliers must issue the invoice through the myDATA platform and then provide the invoice to the buyer in electronic form.

Want to learn more about e-Invoicing compliance?

Download our Global e-invoicing and Tax Compliance fact sheet here for more information.

Key Deadlines 

• 2026-03-02: Mandatory B2B electronic invoicing for Large taxpayers (€1+ million turnover)
• 2026-10-01: Mandatory B2B electronic invoicing for all taxpayers

Standards & Platforms

Platform

With the new electronic invoicing mandate, invoices must be cleared using the myDATA platform.

What formats are required in Greece?

B2G-invoices must conform to the EU 16931-standard and Greek CIUS based on Peppol BIS 3.0.

For B2B transactions, invoices must be cleared with the myDATA platform in XML format. After clearance, the invoices are provided in electronic form to the buyer by the supplier.

Archiving in Greece

What are the archiving requirements in Greece?

The standard archiving period is five 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 electronic invoice cleared with the myDATA platform .

For buyers: A legal invoice is the electronic invoice cleared with the myDATA platform.

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Download our Basware Vault fact sheet here to learn more about our flexible and scalable solution.

Key Actions  

• Ensure compliance: Send electronic invoices after having cleared them with myDATA using providers or government-provided tools.
• Archive invoices: Retain invoice records for five 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 electronic invoices through certified service providers. 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 electronic invoices and confirm that the necessary unique identifiers are included.

Archiving requirement: Invoices must be stored for 5 years in a legible and authentic format. Both digital and paper formats are acceptable.