Greece

Regulations

E-invoicing requirements in Greece

Technical requirements

• Platform: myDATA (Central Portal) / KE.D. (Interoperability Center for B2G).

• Format: EN 16931-1 compliant.

• B2G: Peppol BIS 3.0 (with Greek CIUS).

• B2B: Structured formats (UBL 2.1 or CII) via certified providers or the "timologio" app.

• Archival period: Minimum 10  years

B2G mandates

• Status: Following phased rollout, mandatory for all public contracts above €2,500 as of September 2025.

B2B mandates

• Phase A – Mar 2, 2026: Mandatory issuance for "Large Enterprises" (those with 2023 revenues > €1 Million); grace period until May 3, 2026.

• Phase B – Oct 1, 2026: Mandatory issuance for all other businesses; grace period until October 31, 2026.

E-reporting and e-ledgers mandate (myDATA)

• Mandate: All Greek businesses must transmit "Synopsis" data (summary records) of all revenues and expenses to the myDATA platform.