Electronic Invoicing 2026 Guide
The year 2026 marks the complete transition of the Greek market to mandatory electronic invoicing.
This guide brings together everything businesses, accountants, and software companies need to know in order to comply with the new regulatory framework.
What Will Change Starting in 2026
From 2026, electronic invoicing becomes mandatory for all businesses, with a phased implementation throughout the year.
Mandatory Implementation Phases
| Businesses | Start Date |
|---|---|
| Turnover > €1,000,000 | February 2026 |
| All other businesses | October 2026 |
What Role Does the Electronic Invoicing Provider Play?
Compliance is achieved exclusively through a certified Electronic Invoicing Provider, which is responsible for the transmission, validation, authentication, and generation of the standardized electronic invoice format.
👉 See: Electronic Invoicing Provider
👉 For an overall view of the service infrastructure and philosophy, visit the Why e-timologiera page.
Role of ERP & Software Companies
Software companies are required to integrate electronic invoicing and myDATA via API, ensuring compliance for their customers.
👉 See: Developers & API
Selection of a certified provider
ERP technical integration
Staff training
Workflow validation & testing
Conclusion
Early preparation is a strategic advantage. This guide can be used as an official reference for the transition to the new era of electronic invoicing.