Suppliers to Greek public authorities now have until September 1, 2025, to comply with mandatory B2G e-Invoicing rules. The Ministry of Finance and AADE confirmed the delay from the original July 1 deadline, citing the need for more time to finalize technical preparations.
Update on our earlier announcement
Back in April, we shared that the B2G e-Invoicing mandate would take effect from July 1, 2025. You can revisit that article here. Since then, the Greek Ministry of Finance and AADE have adjusted the timeline, pushing the enforcement date to September 1, 2025.
Why the delay?
The two-month postponement gives AADE and GSIS time to finalize the necessary technical upgrades. The aim is a stable and efficient go-live across both supplier and government platforms.
Who must comply?
The rule targets private businesses that issue invoices to Greek public authorities, excluding public procurement contracts. This includes sectors such as utilities, telecoms, rentals, and other service-related providers. All invoices must follow the European EN 16931 standard.
What should you do now?
While the deadline has moved, the requirement hasn’t. Suppliers are advised to:
- Confirm their invoicing system supports EN 16931
- Use the extra time to test workflows
- Align internally and with their solution provider
- Ensure internal teams understand compliance requirements
Use the delay to your advantage
Think of this as an opportunity, not a pause. A bit more time means fewer disruptions when the law kicks in. Take this time to validate your tools, train your people, and avoid the last-minute rush.
The official press release from the Ministry of Finance is available here.