Greece

Phased Rollout Updated 2026-10-131 change this quarter

Baseline

Mandatory electronic invoicing via AADE myDATA (Greek: ilektronikou timologisi)

Greece requires domestic B2B invoices to be issued electronically through a certified provider or the free AADE application, with each invoice sent to the myDATA platform and given a unique MARK number. The first group, businesses with gross revenue above EUR 1,000,000, started on 2 February 2026. Remaining businesses start on 2 November 2026, with a transition period to 31 January 2027, after the start date was moved from 1 October 2026.

Key Dates

Sep 2023B2G e-Invoicing becomes mandatory step by step for suppliers to Greek public bodies, using Peppol and certified providers

2 Feb 2026Phase A: B2B e-Invoicing starts for businesses with gross revenue above EUR 1,000,000 (2023 tax return)

31 Mar 2026End of the Phase A transition period (as reported by KPMG and Taxheaven)

2 Nov 2026Phase B: B2B e-Invoicing starts for all remaining businesses

31 Jan 2027End of the Phase B transition period; from 1 Feb 2027 invoices must go through a provider or AADE app

Who is in scope

Phase A covers businesses with 2023 gross revenue above EUR 1,000,000, and Phase B covers all other businesses. The duty applies to domestic B2B sales and to sales to non-EU business customers, while e-invoices to buyers in other EU states are optional. Reported exemptions include a loss of connectivity, in which case later transmission rules apply.

Process

ERP or app prepares the invoice data in the myDATA format → certified provider or Timologio app signs and transmits it to myDATA → AADE validates it and assigns a unique MARK and UID → invoice with QR code goes to the buyer → buyer's side receives it through the provider or app → AADE keeps the data for VAT and income books

Official Sources

AADE - Mandatory electronic invoicing FAQ AADE - Procedure of providers' certification AADE - myDATA version v1.0.12 release page GSIS - e-Public procurements' invoice (B2G, Peppol)

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