E-Invoicing in Greece
Mandatory Electronic Invoicing in Greece
Eliminate compliance risks in Greece and gain insights into the digital reporting rules of 70+ other regions.

Greece is on the Road to E‑invoicing
B2G e-invoicing has been mandatory in Greece since 2023. The obligation applies to businesses engaging with entities such as ministries, central administration, and government bodies, with exceptions for transactions under EUR 2,500.
Greek taxpayers have two options for issuing and exchanging e-invoices with government entities. They can use the services of a locally accredited myDATA agent or any e-invoicing service provider of their choice.
On September 16, 2025, the Independent Authority of Public Revenue (AADE) announced the implementation timeline for mandatory electronic invoicing for business-to-business (B2B) transactions, with incentives available for early adoption.
Although a B2B e-invoicing obligation has not yet been implemented, there is an e-accounting obligation called MyData. The documents reported to the platform include invoices, credit and debit notes, classifications (transaction types), payroll, depreciation, and other accounting settlement documents. Taxpayers must submit their accounting data to the MyData platform in real time or periodically, and taxpayers’ books of accounts are created on this basis. The platform allows Greek authorities to process all data and create financial statements for each taxpayer in Greece.
Implementation timeline
2023
- September 1, 2023
For contracts with Ministries of Infrastructure and Transport, Digital Governance, Immigration and Asylum, Municipality of Athens, National Central Authority for Health Procurement, National Central Procurement Authority of Ministry of Development and Investments, Information Society S.A., Athens University of Economics, Attiko Metro S.A., EYDAP S.A., Egnatia Odos S.A.
2024
- January 1, 2024
For contracts with all other central administration bodies.
- July 1, 2024
For contracts with all other government bodies.
- December 2024
Mandate for issuing and sending e-delivery documents via myDATA, including recipient notification using their VAT number.
2025
- January 1, 2025
For all other general government expenses invoiced after that date.
- April 2025
E-delivery system for real-time monitoring of goods in transit, tracking updates, and ensuring the verification of both quality and quantity.
2026
- February 2, 2026
Beginning of Period A of mandatory B2B e-invoicing for large enterprises (with gross revenues exceeding EUR 1 million for the tax year 2023). A gradual implementation period, allowing simultaneous use of business management programs or special entry forms, will run until March 31, 2026. During this quarter, businesses must submit a Declaration of Commencement of Electronic Issuance of Documents or a Declaration of Use of the Timologio Application and begin issuing electronic invoices.
2026
- October 1, 2026
Beginning of Period B of mandatory B2B e-invoicing for all other businesses. A gradual adjustment period will run until December 31, 2026.

Invoice Reporting System
myDATA – Electronic Books (Ηλεκτρονικά Βιβλία ΑΑΔΕ) is an invoice reporting system of the Independent Authority for Revenue – AADE. The system includes invoices, credit and debit notes, classifications (transaction types), payroll, depreciation, and other accounting settlement documents.
In addition to the myDATA requirements, Law 5073/2023 extended tax incentives for the implementation of e-invoicing by entities opting to use certified e-invoicing service providers during the 2023 and 2024 tax years. The incentives include:
- Two-year reduction in the statute of limitations.
- 100% super deduction for the initial purchase of equipment and software, as well as the corresponding expenses related to the issuance of e-invoices during the first year.
- Reduction in the tax refund processing time to 45 days, instead of the standard 90 days.
For these incentives to apply for tax years 2023, and 2024, the implementation process must be completed by December 31, 2023 and December 31, 2024, respectively.

E-transport
In 2024, Greece refined its regulatory framework for electronic delivery (e-delivery) through decisions by the Ministry of Finance and the Independent Authority of Public Revenues (IAPR), aiming to enhance implementation and interoperability. E-delivery, initially introduced under Law 4308/2014, now requires businesses to issue and transmit e-delivery documents using myDATA ERP solutions or e-invoicing services.
The adoption of e-delivery occurs in two phases:
- Phase A (previously Phase One): Businesses must issue and transmit e-delivery documents via myDATA, including notifying recipients using their VAT numbers.
- Since June 2, 2025: certain taxpayers
- From December 1, 2025: remaining taxpayers
- Phase B (previously Phase Two): Covers procedures for loading, unloading, receipt, quality and quantity control, as well as other processes for the digital monitoring of circulation.
- From December 1, 2025: voluntary data transmission to the myDATA digital platform
- Since May 1, 2026: mandatory data transmission
Key regulations include the requirement to transmit e-delivery documents with a MARK and QR code from IAPR in real time, and delivery must be completed within 5 days of issuing documents. Recipients must confirm delivery, report discrepancies within 15 days, and, for foreign deliveries, report them by the 20th of the following month.

Penalties for non-compliance
DISCLAIMER: These are penalties for non-compliance with reporting requirements:
- Failure to transmit summaries of invoiced revenue, self-invoicing expenses, proof of expenditure records, and other tax documents issued under special tax provisions: A penalty equal to 10% of the net value of each non-transmitted document, up to EUR 250 per day.
- Failure to transmit payroll records, depreciation, and relevant revenue and expense adjusting entries that determine an entity's accounting and tax results, or the classification of revenue data from the issuer's viewpoint or the recipient of the self-invoice, resulting in the characterization not being included in the relevant annual income tax return:
- Penalty equal to EUR 250 per tax year for each violation for taxpayers subject to simple accounting.
- Penalty equal to EUR 500 per tax year for each violation for taxpayers subject to double-entry accounting (bookkeeping).
- Transmission of summary data of a document by the issuer, following transmission of an omission or deviation by the recipient, resulting in a difference in value: A penalty equal to 5% of the net value if the original value transmitted is less than the actual value.
It is also provided that penalties for late transmission are 50% of the penalties for failing to transmit. Further, it is provided that if the same violation occurs within five years, the penalties are doubled, and if the same violation is repeated multiple times within five years, the penalties are quadrupled.

Archiving requirements for e‑Invoicing in Greece
- Storage period: 5 years.

How integrity and authenticity may be ensured?
- eSignature is not mandatory.

What is the required format of an e-invoice?
- The required format is PEPPOL BIS 3.0.
Platforms
- MyData, PEPPOL.

How can we help?
Comarch supports a solution that ensures connectivity to the myDATA reporting platform through a partner solution (Impact). It also facilitates e-invoicing activities within regular EDI, as there is currently no mandate for B2B e-invoicing.
Why is Comarch the best choice?
We have 20+ years of experience in carrying out various EDI, e-invoicing, and other document exchange projects around the world. In those years, we have successfully connected more than 130,000 entities from over 60 countries.
1. Legal compliance
Full compliance with the latest data exchange regulations and modern data transfer standards
2. Digitization
Applying new technologies and IT solutions in order to streamline workflows and automate activities and procedures
3. Individual approach
Tailor-made solutions based on processes specific to each company – own road map and a suitable pace of changes
4.Security
Highest level of security for all sensitive and important company data
Legal regulation changes in Greece
Do you want to know more?
If your company is based or has branches in the Greece and you need to prepare your billing and tax systems to comply with the new requirements. Click on the button below to get in touch with one of our experts.
Achieve Global e-Invoicing Compliance with Comarch

Make sure your business meets international standards with the Comarch e-Invoicing platform, trusted in more than 60 countries. Enjoy hassle-free integration and continuous compliance updates.
Our Clients
-

Unilever
The implementation of electronic data interchange at UnileverLearn more -

Leroy Merlin
Comarch Document Management and Exchange Platform for Leroy MerlinLearn more -

Agfa
Implementation of Comarch e-Invoicing at Agfa-Gevaert GroupLearn more -

BIC
Comarch EDI Complex Services for BICLearn more -

Lidl
Comarch e-Invoicing at LidlRead more -

METRO Digital
Comarch EDI at METRO DigitalLearn more -

Danone
Benefits of implementing Comarch Electronic Data InterchangeLearn more -

Kraft Heinz
Comarch Master Data Management (MDM) ProjectLearn more -

ObjetRama
Comarch EDI at ObjetRamaLearn more -

Volotea
Digitize Billing Processes With Comarch E-InvoicingLearn more -

Technicolor
Implementation of Comarch EDI at TechnicolorLearn more -

Carrefour Poland
Comarch EDI at Carrefour PolandLearn more -

Red Bull
Red Bull actively develops business processes by using modern Comarch solutionsLearn more -

Colgate-Palmolive
Online Distribution and Mobile Sales Force for Colgate-PalmoliveLearn more -

Balconi
Implementation of Comarch EDI at BalconiLearn more -

La Redoute
Implementation of Comarch EDI at La RedouteLearn more -

Italcementi
Italcementi and Comarch: Improving business efficiency by digitizing invoicing processesLearn more -

Bolsius
Implementation of Comarch EDI solution for BolsiusLearn more -

Belmond Group
Belmond Group Chooses Comarch to Update its E-invoicing and E-archiving SystemsLearn more -

Angelini Holding
Angelini Holding S.p.A Chooses Comarch EDI Platform for its Foreign BranchesLearn more -

Sammontana
Sammontana Chooses Comarch Master Data ManagementLearn more -

BayWa
BayWa Implements Comarch EDI to Meet the Upcoming B2G E-invoicing ObligationLearn more -

Ursus Breweries
Comarch E-invoicing Helps Ursus Breweries Meet New Legal Requirements in RomaniaLearn more -

Heidelberg Materials
Global Digitization with Comarch EDI at Heidelberg MaterialsLearn more -

Monini
Monini chooses Comarch’s EDI platformLearn more -

Mutti
chooses Comarch EDI for multi-country data processesLearn more -

De Cecco
Comarch EDI at De CeccoLearn more -

La Doria
Processes of Electronic Data Interchange in E-commerceLearn more








































