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The deadline, format, and obligation for every country with an active or upcoming e-invoicing mandate — in one place, updated as rules change. No sign-up.
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← All mandates
GR
EU · Reporting (myDATA)
Mandatory B2B e-invoicing rolls out in two phases via the myDATA platform: large enterprises first, everyone else from October 2026.
Live now
Applies to
B2B, B2G
October 1, 2026
Next phase deadline
All businesses from 1 Oct 2026
Two questions. The fixed-establishment rule is where most foreign businesses get it wrong.
Is your business established in Greece (registered office, branch or fixed establishment)?
Do you issue domestic B2B invoices in Greece?
Greece: likely outside the issuing mandate — watch e-reporting / cross-border
VAT registration or trading alone, without a fixed establishment, usually keeps you outside Greece's issuing obligation — but you may still face e-reporting or need to receive structured e-invoices. Confirm your establishment status.
Not in scope for Greece
With no establishment and no registration or trade in Greece, the mandate doesn't apply to you today. Revisit this if you open a branch, warehouse or start supplying into Greece.
In scope — issue structured e-invoices in Greece
As an established business issuing domestic B2B invoices, you must send them as compliant e-invoices. In force since 2 Mar 2026 for businesses with FY2023 revenue above €1m; applies to everyone else from 1 Oct 2026 (transitional window to 31 Dec 2026). Choose an accredited provider or AADE app and file the declaration of commencement.
In scope to receive in Greece
Even if you don't issue domestic B2B invoices, an established business must be able to receive e-invoices. In force since 2 Mar 2026 (phase 1) and from 1 Oct 2026 (phase 2). Confirm you can receive e-invoices carrying a MARK and QR.
A single date hides the rollout. Here's the full sequence.
1 September 2025
General Government (B2G)
E-invoicing became mandatory for suppliers for all General Government expenditure over €2,500, phased in by authority type from 13 September 2024.
Done
2 March 2026
Businesses with FY2023 gross revenue above €1,000,000
Mandatory B2B e-invoicing began for businesses with FY2023 gross revenue above €1m (postponed from 2 February by Α.1044/17-02-2026), with a transitional window to 3 May 2026.
Done
1 October 2026
All remaining businesses
Every remaining VAT-registered business must issue B2B e-invoices through myDATA.
Next
1 July 2030
ViDA – intra-EU B2B
Structured e-invoicing and digital reporting become mandatory for intra-EU B2B transactions under ViDA.
Future
1 January 2035
Alignment with the EU standard
myDATA must converge on the ViDA / EN 16931 model by 1 January 2035.
Future
The standards, scope and dates that define the mandate – at a glance.
Transaction scope
B2B, B2G
Model
Reporting (myDATA)
Formats
myDATA structured XML via accredited providers (ΥΠΑΗΕΣ) or AADE's timologio/myDATAapp, with MARK and QR, for B2B; EN 16931 Greek Peppol CIUS for B2G (KED hub)
Region
EU
STATUS
Live now
Scope
Taxable persons established in Greece, for domestic B2B and B2B supplies to non-EU customers; intra-EU B2B optional; B2C excluded; non-established persons outside the mandate (Council Implementing Decision (EU) 2025/502). Phase 1 (revenue above €1m in FY2023) from 2 Mar 2026, transitional window to 3 May 2026. Phase 2 (all others) from 1 Oct 2026, transitional window to 31 Dec 2026 provided the Declaration of Commencement of Electronic Issuance is on file – the provider files it within 10 days of the contract; the business has 10 further days if the provider fails. B2G via EN 16931/Peppol through the KED hub.
Failure to issue an e-invoice is treated as non-issuance: 50% of the VAT due per transaction; €500 (simplified books) or €1,000 (double-entry) per audit for non-VATable transactions. Separate fines for myDATA transmission failures.
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