Greece has introduced a three-layer digital tax framework that combines real‑time reporting via myDATA, a structured B2B e‑invoicing mandate, and an e‑transport system for goods movement. The B2B e‑invoicing requirement becomes mandatory on March 2 2026 for firms with revenue above €1 million and on October 1 2026 for all other businesses, while myDATA has been compulsory since 2021. Early adopters receive significant tax incentives, and non‑compliance triggers steep penalties.

Greek authorities have postponed the mandatory B2B e‑invoicing go‑live to 2 March 2026, with a two‑month soft‑launch ending in early May. The first wave targets resident large businesses (turnover €1 million+) and covers domestic B2B supplies and exports outside the EU, while EU B2B remains optional. Penalties for non‑compliance include VAT‑based fines and fixed €500/€1,000 penalties, and businesses must submit a commencement declaration to AADE before issuing e‑invoices.

Greek tax authority AADE has postponed the mandatory B2B e‑invoicing launch to 2 March 2026, with a two‑month soft launch ending 2 May 2026 for large resident businesses. All other resident taxpayers must adopt the system from 1 October 2026, and a new penalty regime and early‑adopter incentives have been announced.

Greece will gradually enforce mandatory B2B e‑invoicing, starting 2 February 2026 for high‑revenue firms and 1 October 2026 for all other entities. The new rules cover all B2B transactions, sales to non‑EU entities (excluding retail) and public‑sector contracts, requiring use of the IAPR’s Timologio platform. Businesses should prepare early to comply with the new invoicing framework.

Greece's parliament has passed a bill mandating electronic invoicing for business-to-business transactions, with incentives available for entities that adopt e-invoicing early. The requirement applies to domestic B2B transactions, exports to non-EU destinations, and public contracts.