Greece has invoices reported to the AADE through myDATA, where each invoice receives a MARK. B2B phase 1 (2023 revenue above €1M) applies since 2 March 2026, phase 2 for everyone else from 2 November 2026, with a reported transition to 31 January 2027.
| Size band | Receive since | Issue from |
|---|---|---|
| 2023 revenue above €1 million | law Source: vatcalc · 1 Oct 2026 · verified 15 Oct 2026 · secondary unverifiedWe found this in secondary sources or sources disagree; we have not yet confirmed it in the official text. See unverified items | law Source: vatcalc · 1 Oct 2026 · verified 15 Oct 2026 · secondary unverifiedWe found this in secondary sources or sources disagree; we have not yet confirmed it in the official text. See unverified items |
| All remaining businesses | law Source: vatcalc · 1 Oct 2026 · verified 15 Oct 2026 · secondary unverifiedWe found this in secondary sources or sources disagree; we have not yet confirmed it in the official text. See unverified items | law Source: vatcalc · 1 Oct 2026 · verified 15 Oct 2026 · secondary unverifiedWe found this in secondary sources or sources disagree; we have not yet confirmed it in the official text. See unverified items |
Verified:
Scope: Businesses in B2B phase 1 (2023 revenue above €1M); all others from 2 Nov 2026
Domestic B2B e-invoicing with myDATA reporting
Penalties from May 2026. Sources differ on whether phase 1 started in February or March 2026.
Domestic B2B e-invoicing with myDATA reporting
Originally 1 Oct 2026. A transition period to 31 Jan 2027 is reported from an AADE document of 30 Sep 2026 that was not verified. Channel notification to AADE by 30 Sep 2026.
Small-business regime: Not captured in research
Must receive e-invoices: yes · Must issue e-invoices: yes
Phase 2 covers all remaining businesses, so no size exemption is recorded.
Hybrid (public platform plus private providers)
Platform: myDATA (AADE, Independent Authority for Public Revenue)
Invoices are issued through certified providers or the free AADE tools (timologio, myDATAapp) and transmitted to myDATA, which assigns each invoice a MARK.
| Format | Syntax | Version | Must be accepted | Notes |
|---|---|---|---|---|
| myDATA invoice data | AADE myDATA XML | Not captured in research | yes | Invoice data is transmitted to myDATA; the exact schema version and EN 16931 status were not captured. Source: vatcalc · 1 Oct 2026 · verified 15 Oct 2026 · secondary |
| Channel | Kind | Required | Notes |
|---|---|---|---|
| Certified e-invoicing provider | API / platform | no | Invoices may be issued and transmitted through providers certified by the AADE. |
| AADE timologio / myDATAapp | Portal | no | Free tools provided by the AADE. |
Accredited channel provider · Required: no
Invoices run via certified providers or the free AADE tools. Whether a software vendor must itself be a certified provider was not captured. Source: vatcalc · 1 Oct 2026 · verified 15 Oct 2026 · secondary
Receiving duty: law Source: vatcalc · 1 Oct 2026 · verified 15 Oct 2026 · secondary unverified
We found this in secondary sources or sources disagree; we have not yet confirmed it in the official text. See unverified items
The research describes the mandate through the issuing phases; a separate receiving duty is not stated.
Formats to produce: myDATA invoice data
Public-sector e-invoicing since no date yet law Source: vatcalc · 1 Oct 2026 · verified 15 Oct 2026 · secondary unverified
We found this in secondary sources or sources disagree; we have not yet confirmed it in the official text. See unverified items
myDATA / AADE
B2G e-invoicing is mandatory; the start date and formats were not captured in the research.
Corporate buyers on SAP Business Network, Coupa, Tungsten or Basware: see Integrations.
no date yet law Source: vatcalc · 1 Oct 2026 · verified 15 Oct 2026 · secondary
Every invoice is reported to myDATA and receives a MARK.
The start date of myDATA reporting was not captured.
Retention period: 10 years Source: Lawspot (secondary copy of the law) · undated · verified 16 Oct 2026 · secondary unverified
We found this in secondary sources or sources disagree; we have not yet confirmed it in the official text. See unverified items
The period starts: End of the tax year or reporting period
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Check my obligationsWe found this in secondary sources or sources disagree; we have not yet confirmed it in the official text.