On 16 September 2025, the Greek Independent Authority for Public Revenue (AADE) formally unveiled the implementation schedule for the nation's mandatory electronic invoicing system, marking a significant digital transformation of the fiscal landscape set to commence in 2026. The cornerstone of this initiative is the introduction of compulsory business-to-business (B2B) e-invoicing, which will take effect from 2 February 2026. This mandate will initially apply to Greek companies that reported a gross revenue exceeding €1 million during the 2023 tax year, encompassing their transactions with other domestic businesses as well as with entities based in non-EU countries. However, in a notable distinction, e-invoicing for B2B transactions with businesses located within the European Union will remain an optional practice at this stage.

To facilitate a smoother transition for the affected enterprises, the regime will begin with an initial adaptation period running from 2 February to 31 March 2026. During this two-month window, businesses will be permitted to issue compliant electronic invoices either through their established business management systems, such as ERP or accounting software, or by utilizing a special registration form provided by the authorities. This phased approach is designed to allow companies to integrate the new requirements into their operational workflows without immediate disruption. Following this initial rollout, a further expansion of the mandate is scheduled for 1 October 2026, at which point other businesses not included in the first wave will be brought into the system, with a phased transition period extending until the end of the year on 31 December 2026.
To encourage voluntary and early compliance, the Greek government has introduced substantial financial incentives. Companies that proactively adopt the e-invoicing framework ahead of their mandated deadline will be rewarded with significant tax benefits. These include a 100% increase in the depreciation rate for relevant equipment and software acquisitions, effectively accelerating the cost recovery for these necessary investments. Furthermore, businesses can benefit from a 100% increase in the deductibility of expenses directly associated with the implementation and operation of the e-invoicing system for the first twelve months of use. This comprehensive strategy, combining a clear, staged timeline with tangible fiscal incentives, underscores Greece's commitment to modernizing its tax administration, enhancing transparency, and reducing the administrative burden on the business community through the widespread adoption of digital invoicing.








