Greece has extended the deadline for large enterprises to comply with mandatory electronic invoicing, giving businesses additional time to implement the required systems. Enterprises can use transitional arrangements to gradually adopt electronic invoicing while maintaining existing accounting processes.
Greece’s Ministry of National Economy & Finance and the Independent Authority for Public Revenue (AADE), on 17 February 2026, have extended the deadlines for the implementation of mandatory electronic invoicing for large enterprises included in the first phase of the rollout.
The commencement dates for mandatory electronic invoicing have been postponed to allow businesses additional time to complete the necessary technical adjustments.
The measure applies to enterprises with gross revenues exceeding EUR 1,000,000 for the 2023 tax year. AADE noted that compliance is already advanced, with around 34,000 of the 38,000 obligated enterprises having activated the electronic issuance process.
New implementation timeline
- 2 March 2026: Start of mandatory implementation
- 2 March 2026 – 3 May 2026: Transitional period for gradual implementation of electronic invoicing, during which businesses may continue to use enterprise management software (commercial/accounting, ERP) or the special entry form in parallel.
It is reminded that each enterprise may fulfill its obligation by choosing one of the following methods:
- Services of an Electronic Invoicing Provider, or
- Free AADE applications: timologio and myDATAapp for mobile devices, which also cover, at no cost, the issuance of electronic invoices for public contracts.
AADE reminded enterprises that the obligation may be fulfilled through either the services of an Electronic Invoicing Provider or via free AADE applications, namely timologio and myDATAapp for mobile devices. These applications also cover, at no cost, the issuance of electronic invoices for public contracts.
Obligated enterprises are required to submit either a Declaration of Commencement of Electronic Issuance of Documents or a Declaration of Use of the timologio application, with an effective start date of 2 March 2026, and to begin issuing electronic invoices within the transitional period.
The authorities clarified that failure to comply with the obligation to issue electronic invoices under Decision E.2004/2026 is considered equivalent to non-issuance of an invoice. As a result, penalties under the Tax Procedure Code (Article 57, paragraphs 5 and 6, Law 5104/2024) will apply. For transactions subject to VAT, the fine amounts to fifty percent (50%) of the tax that would have arisen from the unissued document or of the relevant difference. For transactions not subject to VAT, fines of EUR 500 per tax audit apply to entities using the single-entry bookkeeping system, and EUR 1,000 per tax audit to entities using the double-entry bookkeeping system.
