Greece is progressing with its shift to digital invoicing with a mandatory business-to-government (B2G) e-invoicing mandate now rolling out in phases and a broader business-to-business (B2B) mandate expected soon. The well-known myDATA platform will continue to play a central role in helping businesses and the public sector to exchange and report invoices efficiently and in real time.
This article was last updated on 3 July 2025 to reflect recent adjustments to the B2G e-invoicing deadlines.
The original legal text announcing the B2G e-invoicing mandate was published in the Official Gazette of Greece in 2023 and outlined the initial requirements and timelines for electronic invoicing in public contracts. This development marked a progressive step in streamlining public procurement processes and embracing digital technologies.
What are the Greek authorities aiming to achieve?
The B2G electronic invoicing (e-invoicing) mandate aims to establish a standardised framework for electronic invoicing in public contracts. Following the adoption of the European standard for issuing electronic invoices, businesses will now be required to submit their government invoices digitally.
Like many other countries around the globe, Greece hopes that the transition from paper-based to electronic invoicing will benefit public procurement procedures by increasing efficiency, reducing administrative burdens, and minimising invoicing errors.
When will the mandate take effect?
The joint decision published on 12 April 2023 by the Ministers of Finance, Development and Investments, Digital Governance, and Transport provides a clear timeline for the phased implementation of the B2G invoicing mandate. The decision outlines the following key milestones for expenses incurred in executing contracts, for which the conclusion procedures start after:
- 12 September 2023: Contracts with designated major government agencies (e.g., the Ministry of Transport, the Ministry of Digital Transformation, and the Ministry of Migration and Asylum) will be required to comply with the e-invoicing mandate.
- 1 January 2024: Obligation for all contracts with all central government agencies.
- 1 June 2024: Obligation for contracts with other government authorities.
- 1 September 2025: The final phase of the mandate, originally set for 1 January 2025 and subsequently postponed to 1 June 2025, has now been officially pushed back to 1 September 2025. From this date, the mandate will cover all other government expenses exceeding € 2,500, specifically non-procurement public expenses (e.g., utilities, rents). This final stage emphasises the complete transition towards a paperless invoicing system for a broader range of government expenditure.
Who benefits from the mandate?
The implementation of the B2G e-invoicing mandate benefits both the government and Greek businesses. By embracing e-invoicing, the Greek authorities can streamline administrative procedures, reduce paperwork and make public procurement processes more efficient.
For businesses, electronic invoicing improves the speed and accuracy of invoice submission and processing. The standardised framework ensures consistency in invoicing practices and enables smoother transactions between suppliers and the government.
How does myDATA fit in?
Greece’s B2G e-invoicing mandate does not stand alone. All Greek businesses are already required to report their invoice data to the Independent Authority for Public Revenue (Ανεξάρτητη Αρχή Δημοσίων Εσόδων, or AADE) via myDATA, Greece’s national digital bookkeeping and tax reporting platform.
This means that, as well as sending structured invoices directly to public sector bodies, suppliers must also transmit the invoice data to myDATA in real time.
This requirement forms the backbone of Greece’s strategy for closing the VAT gap and boosting tax compliance. When Greece implements its anticipated B2B e-invoicing mandate, myDATA will play an even greater role as the central hub for recording and validating all business invoices, both domestic and cross-border.
Looking ahead
Beyond B2G, Greece is making significant progress in its broader digital transformation agenda. On 13 March 2025, the EU Council authorised Greece to implement mandatory domestic B2B e-invoicing via Council Implementing Decision (EU) 2025/502. The initiative is expected to launch in the coming months and utilise the existing myDATA platform to transmit and validate data in real time. Invoices must adhere to the European standard for electronic invoicing (EN 16931). This move highlights Greece's commitment to improving tax compliance and optimising business processes across all sectors.
In addition, Greece is introducing a national e-transport (e-delivery) obligation to digitally track the movement of goods and securely exchange electronic delivery notes. According to the latest deadlines, the first phase will become mandatory on 2 June 2025 for businesses with an annual turnover exceeding € 200,000 (with some exceptions), as well as for businesses in certain wholesale sectors. For all other taxpayers, it will remain optional until 1 December 2025. From this date onwards, the obligation will apply to all remaining businesses.
Stay up to date
To stay informed on Greece’s e-invoicing progression, as well as other countries looking to introduce mandatory B2G and B2B mandates, follow Unifiedpost Group on LinkedIn and sign up for our e-invoicing monthly newsletter.
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Danielle has 15 years of experience in customer relationship management within invoicing and financial administration. She currently works in Geneva, supporting global customers at Unifiedpost Group and helping multinational companies digitise their processes. Over the years, she has been closely involved in the digital transformation of invoicing, including leading e-invoicing initiatives across the EMEA and Asia-Pacific regions for a major multinational. Her extensive experience means she’s always up to date on the latest e-invoicing regulations and changes around the world.
