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TOOLS · Tracker
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.
Within 12 months
Applies to
B2B, B2G
October 1, 2026
Next phase deadline
All businesses from 1 Oct 2026
Three questions. The fixed-establishment rule is where most foreign businesses get it wrong.
13
1
Is your business established in Greece (registered office, branch or fixed establishment)?
Next question
14
Verdict
25
26
2
Do you issue domestic B2B invoices in Greece?
27
28
Caution
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.
Out of scope
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
In scope — issue structured e-invoices in Greece
As an established business issuing domestic B2B invoices, you must send them as compliant structured e-invoices. The mandate is already in force (since October 2026). Set up your platform/format and test before you rely on it.
In scope to receive in Greece
Even if you don't issue domestic B2B invoices, an established business must be able to receive structured e-invoices. The mandate is already in force (since October 2026). Confirm your receiving capability first.
Start over
A single date hides the rollout. Here's the full sequence.
2 March 2026
Large enterprises
Mandatory B2B e-invoicing via myDATA began for large enterprises.
Done
1 October 2026
All remaining businesses
Every remaining VAT-registered business must issue B2B e-invoices through myDATA.
Next
The standards, scope and dates that define the mandate – at a glance.
Transaction scope
Model
Reporting (myDATA)
Formats
myDATA
Region
EU
STATUS
Scope
Mandatory B2B e-invoicing rolls out via myDATA: large enterprises from 2 Mar 2026, all remaining businesses from 1 Oct 2026.
Penalties for failure to transmit data to myDATA; loss of the right to deduct expenses and input VAT on undocumented transactions.
News, guides and rulings tagged for this country.
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