The Electronic invoicing in Greece is now a reality and a cornerstone of the country’s tax modernization. Following European Union initiatives, the authorities have introduced a model based on real-time reporting and prior tax validation. This new framework requires companies to issue and report their electronic invoices through the myDATA tax platform. Let’s take a look at who is required to comply, when the requirements took effect, the technical standards, and how to implement an efficient solution.
What is electronic invoicing in Greece, and how does the myDATA system work?
The Greek electronic invoicing model revolves around myDATA, a government digital platform that centralizes companies’ accounting information. Furthermore, starting in 2021, companies established in Greece must report their accounting and tax data electronically to this system.
Here's how it works:
- The company generates the invoice in in its ERP or billing system.
- The The invoice is sent to myDATA in near real time.
- The system validates the tax information.
- The platform returns a unique invoice identifier (MARK).
- The validated invoice is sent to the end customer.
| The Greek electronic invoicing system combines real-time tax e-reporting with pre-validation of invoices (model CTC or clearance).
Each approved invoice includes:
Before sending the invoice to the customer, make sure it includes these two elements generated by the platform. Otherwise, it will not be valid. |
Legal Requirement for Electronic Invoicing in Greece
The mandatory implementation of electronic invoicing in Greece is being phased in, with several phases depending on the type of transaction and the size of the company.
B2G (Business-to-Government) Electronic Invoicing
On the one hand, it is already mandatory for public sector suppliers.
- Effective date: September 2023.
- Application: public contracts and government payments exceeding €2,500
- Format: European standard EN 16931.
Public entities may only accept electronic invoices that comply with this standard.
B2B Electronic Invoicing in Greece (between businesses)
On the other hand, B2B invoicing in Greece will become mandatory in 2026, in accordance with this implementation schedule:
| Phase | Affected companies | Date |
| Phase 1 | Companies with revenue > €1 million | February 2, 2026 |
| Phase 2 | Other companies | October 1, 2026 |
The first few months are a transition period during which different accounting systems or ERPs may coexist.
In turn, this affects:
- Domestic B2B transactions.
- Transactions with companies outside the EU.
For transactions within the EU, for the time being, electronic invoicing will remain optional if the other party does not accept it.
Which companies are required to issue electronic invoices?
In this regard, the requirement applies to all companies subject to Greek accounting standards. Specifically:
- Greek companies with B2B operations within the country.
- Companies that sell to the public sector (B2G).
- Foreign companies with a permanent establishment in Greece.
- Businesses that issue invoices for goods or services subject to Greek VAT, as well as as well as transport documents and credit notes.
Therefore, it covers virtually all business transactions that are significant from a tax perspective.
Electronic Invoice Standards and Formats in Greece
To ensure interoperability and tax compliance, Greece requires specific formats and technical standards.
- Standards: EN 16931, structured XML, and integration with myDATA.
- Required billing information, according to Greek law:
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- Tax ID numbers of the issuer and recipient.
- Transaction description.
- Taxable base.
- VAT rate.
- Total amount of the invoice.
- MARK validation code.
- Tax QR code.
Integration with ERP and billing platforms
For multinational companies, one of the challenges is integrating electronic invoicing with the corporate ERP (SAP, Dynamics, etc.).
If the integration is done correctly, the process will follow the usual flow: the ERP system generates the invoice, the platform processes it and sends it to myDATA via API or through a certified provider, the company receives the MARK identifier in return, and finally, issues the invoice.
Benefits of ERP Integration
With this workflow the process is streamlined while also complying with regulations. To be more precise, ERP integration delivers these benefits in Greece… and in any country:
- Automate tax compliance.
- Eliminate manual tasks.
- Consolidates global financial data.
- It provides centralized control for CFOs.
Impact of VAT on Greek electronic invoicing
At the same time, the VAT control in electronic invoicing is another aspect worth mentioning. The goal of digitization is to to reduce the VAT gap and combat tax fraud.
To do this, you first need to understand what type of VAT applies in Greece.
| VAT rate | Percentage |
| Standard type | 24% |
| Reduced rate | 13% |
| Super-low rate | 6% |
Now, with the data in myDATA, the administration automatically verifies the reported VAT, detects tax inconsistencies, and can pre-fill .
In addition to VAT, the system also facilitates the management of excise taxes, withholding taxes, and accounting obligations. Thus, it automates a large part of tax reporting, minimizing the administrative burden on companies.
Benefits of Implementing Electronic Invoicing in Greece
Beyond all the regulatory reasons we have just mentioned, electronic invoicing in Greece offers very attractive operational benefits for businesses.
Here are a few examples:
- Eliminate manual processes.
- Reduce invoice processing time.
- Reduces data errors, tax inconsistencies, and duplications.
- Updated legal compliance.
- It provides full traceability of all operations.
- It works with centralized accounting data.
- Real-time financial reporting.
- Reduce administrative costs related to paper use and storage.
How easyap simplifies online invoicing in Greece
However, for multinational companies operating in Greece, implementation can present certain challenges. For example, adapting ERP systems, integrating myDATA, complying with multiple jurisdictions, managing various digital certificates, coordinating tax and finance departments…
This is where easyap, which is perfect for this scenario. Without further ado, here’s what we offer you.
- Legal compliance. We fully automate the management of electronic invoices in various countries, ensuring compliance with all local regulations.
- Technical and legal updates. We integrate with myDATA and many other platforms, provide support for EN 16931, and offer automatic updates in response to regulatory changes.
- Integrations with the leading ERP systems. In addition, easyap integrates seamlessly with the most powerful ERP systems on the market. We also design solutions with advanced security features (electronic signatures, certificate management, etc.).
- Full automation of the invoicing cycle. Our solution allows you to generate invoices, validate them, send them to customers, and archive them electronically. This enables CFOs and finance managers to maintain control over international tax compliance without increasing the operational burden.
Frequently Asked Questions About Electronic Invoicing in Greece
Is it mandatory to use myDATA for all invoices?
Yes. All companies subject to Greek accounting regulations must submit their invoice data to myDATA for tax validation.
Are foreign companies required to issue electronic invoices in Greece?
It depends. If they have a permanent establishment in Greece or are required to issue invoices with Greek VAT, they will have to comply with myDATA and Greek law.
Can invoices be sent as PDFs in Greece?
A PDF can be used as a visual representation, but it is not considered a valid electronic invoice unless it is reported and validated in myDATA.
What happens if a company fails to comply with electronic invoicing requirements?
Authorities may impose administrative or disallow tax deductions tax deductions.
Electronic invoicing in Greece continues to gain momentum. As with the rest of Europe, we are at a point where it is essential to have invoicing systems that comply with both European and local requirements. At easyap, we simplify this entire transition securely and efficiently, no matter how complex your industry or the regulations you must comply with. Contact us and we’ll show you how.
