From February 2, 2026, electronic invoicing for B2B transactions becomes mandatory.

From February 2, 2026, the issuance of electronic invoices becomes mandatory for every business-to-business (B2B) transaction in Greece.

The transition to the new system includes planned implementation stages, as well as financial incentives for those who adopt it earlier.

See below what the new framework provides, the implementation timeline, and how you can benefit from the early adoption incentives and Primer Software’s offer.

What does the new framework provide?

The electronic invoicing obligation is established through decisions by the Deputy Minister of Economy and the Governor of the Independent Authority for Public Revenue (AADE) and covers:

  • Sales of goods and services between Greek businesses
  • Transactions with businesses in third countries (outside the EU)
  • Optional use for B2B transactions within the EU

For transactions between Greek businesses, acceptance of the electronic invoice is mandatory for the recipient.

In contrast, for transactions with foreign businesses, acceptance is not mandatory.

Implementation Options

Each business can choose between:

  • Using an Electronic Invoicing Provider
  • The free timologio application by AADE or the myDATAapp mobile application

The Primer ERP integrates electronic invoicing functionality with automatic transmission to myDATA and supports connection with a certified provider, ensuring full compliance and time savings for your business.

Implementation Timeline

Phase A – Large Enterprises (revenue > €1,000,000)

  • Start: 02/02/2026

  • Adjustment period: Until 31/03/2026
    Businesses must declare their invoicing method and begin implementation within the first quarter.

Phase B – All Other Businesses

  • Start: 01/10/2026
  • Adjustment period: Until 31/12/2026

Primer helps you adapt immediately.

The Primer ERP is fully compatible with the myDATA platform and integrates electronic invoicing features, provider connectivity, and automatic invoice archiving.

With Primer’s support, the transition to the new framework becomes simple, smooth, and 100% technologically covered.

Advantages of Early Adoption

Businesses that start using electronic invoicing two months earlier benefit from:

  • Full depreciation of equipment and software costs within the same year
  • 100% increase in expenses related to invoicing, invoice transmission, and invoice archiving for 12 months

Early adoption deadlines:

  • Until 01/12/2025 for the large enterprise phase

  • Until 03/08/2026 for all other businesses

Primer ERP already supports early adoption, allowing you to benefit immediately from the available tax incentives!

Advantages of Electronic Invoicing

The new process is not only about compliance, but also represents an opportunity for:

  • Reducing management costs and minimizing errors in the invoicing process

  • Automated submission of data to myDATA and pre-filling of VAT declarations

  • Enhanced transparency and reduction of fraudulent invoices

  • Competitive advantage for businesses adopting digital tools

More Information

The Primer team is available to assist you with:

  • Training and adapting your Primer ERP system to meet the new requirements

  • Connecting your business with the AADE through an electronic invoicing provider

  • Ongoing support for myDATA compliance.

Contact us for more information at +30 210 68 24 389.

Take advantage of the Digital Transactions – Phase B Program and acquire Primer ERP free of charge for 1 year!

Submit your application by September 30 and get Primer ERP free of charge for 1 year through the Category 3 Digital Transformation voucher!
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