Greece has assembled one of Europe’s most ambitious digital tax frameworks by layering three distinct compliance mechanisms on top of each other: the myDATA real-time reporting platform, a structured B2B e-invoicing mandate rolling out in 2026, and a phased e-transport system for tracking physical goods movements. Administered by the Independent Authority for Public Revenue (AADE), the system is designed to give tax authorities continuous, near-complete visibility into business transactions, from the moment an invoice is issued to the moment goods arrive at their destination.
Current status: myDATA has been mandatory for all Greek taxpayers since 2021, with every invoice requiring a MARK validation ID and QR code from AADE. B2B e-invoicing becomes mandatory from March 2, 2026 for businesses with revenue above €1M, and from October 1, 2026 for all remaining businesses. B2G e-invoicing is already mandatory using EN 16931 / Peppol standards.
The Three Layers of Greece’s Digital Tax System
myDATA - Real-Time Transaction Reporting
The myDATA (my Digital Accounting and Tax Application) platform has been the backbone of Greece’s digital tax strategy since its full rollout in 2021. Every business in Greece, regardless of size or sector, must transmit invoice data to AADE in real time or near real time. Upon successful transmission, each invoice receives a unique MARK (validation identification number) and a QR code, both of which must appear on the final document issued to the counterparty. For official guidance, see the AADE myDATA portal.
- •MARK ID: A unique identifier assigned by AADE upon successful validation of each invoice’s data. Without a valid MARK, an invoice is not considered legally compliant.
- •QR codes: Every invoice must carry a QR code linking to AADE’s systems, allowing recipients and authorities to verify the document’s authenticity instantly.
- •Pre-filled VAT returns: AADE uses myDATA data to generate pre-filled VAT returns, reducing manual entry and improving accuracy for taxpayers.
B2B E-Invoicing - The 2026 Mandate
Building on the myDATA foundation, Greece is introducing mandatory structured e-invoicing for all B2B transactions in a two-phase rollout. From March 2, 2026, businesses with annual revenue exceeding €1M must issue and receive e-invoices in the EN 16931 format via the Peppol network. From October 1, 2026, the obligation extends to all remaining businesses. Receiving businesses must accept e-invoices because compulsory acceptance is a core principle of the mandate.
- •Standard: EN 16931 / Peppol, aligning Greece with the broader European e-invoicing infrastructure already used for B2G transactions.
- •EU and non-EU sales: E-invoicing is optional for intra-EU sales but mandatory for transactions with non-EU counterparties.
- •Compulsory acceptance: Businesses on the receiving end must be capable of accepting structured e-invoices once the mandate applies to their revenue tier.
E-Transport - Digital Goods Movement Tracking
The third layer of Greece’s digital tax system addresses the physical movement of goods. Under the e-transport requirement, businesses must report goods descriptions, dispatch details, and commodity codes to AADE before goods are transported. The rollout has been phased, with different commodity categories brought into scope over time. This layer closes a gap that myDATA alone cannot address: verifying that reported transactions correspond to actual physical deliveries.
Incentives for Early Adoption
Greece has taken a particularly proactive approach to encouraging early compliance with the e-invoicing mandate. Businesses that integrate with the e-invoicing infrastructure at least two months before their mandatory deadline can claim two significant benefits during the first 12 months of use:
- •100% additional depreciation: Full additional depreciation on technical equipment and software acquired for e-invoicing compliance, effectively doubling the standard depreciation allowance.
- •100% increase in deductible expenses: All expenses directly related to e-invoicing implementation (including software licensing, integration costs, and consulting fees) can be deducted at double their actual value.
These incentives represent a clear signal from AADE that early adoption is not just encouraged but financially rewarded. For businesses already considering ERP or invoicing system upgrades, the timing creates a compelling case to move ahead of the deadline.
Penalties for Non-Compliance
The penalty structure for non-compliance with Greece’s e-invoicing and myDATA obligations is designed to be proportionate but firm:
- •VATable transactions: A fine of 50% of the VAT amount on the transaction for failure to issue a compliant e-invoice or report to myDATA.
- •Non-VAT transactions: Fixed fines ranging from €500 to €1,000 per infringement, depending on the nature and frequency of the violation.
Practical note: The 50% VAT penalty makes non-compliance particularly expensive for high-value transactions. Businesses processing large invoices should prioritise e-invoicing readiness well before their applicable deadline, especially given the early-adoption incentives that offset implementation costs.
Greece in the European Context
Greece’s three-layer approach (real-time reporting, structured e-invoicing, and goods movement tracking) places it among Europe’s most digitally advanced tax administrations. The architecture shares similarities with Lithuania’s i.MAS system, which also combines invoice reporting (i.SAF), transport documentation (i.VAZ), and full accounting records (i.SAF-T) into a single integrated framework. Both countries demonstrate that multi-module systems, while more complex to implement, provide tax authorities with the cross-referencing capability needed to close the VAT gap.
Greece’s adoption of EN 16931 and Peppol for e-invoicing also aligns with the broader direction set by the EU ViDA (VAT in the Digital Age) initiative, which aims to establish EU-wide digital reporting standards by 2030. Greece is targeting full ViDA alignment by July 2030, and its existing myDATA infrastructure positions it well for that transition. Countries like Hungary, which pioneered real-time invoice reporting in 2018, have shown that early investment in digital tax infrastructure pays dividends in compliance rates and revenue collection. For a broader comparison across the continent, see our SAF-T adoption across Europe overview.