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Navigating Greece's New E3 Form and myDATA System

Understand the new E3 form and myDATA system in Greece and how they change tax reporting for expats and investors. Learn how Ellytic can help ensure compliance with these new regulations.

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Written by Lazaros
February 18, 2026
4 min

Understanding the New E3 Form and myDATA

Greece's tax reporting landscape is undergoing significant changes with the introduction of the new E3 form in conjunction with the myDATA system. This development is particularly crucial for expats, investors, and business owners operating within Greece, as it fundamentally alters how income and expenses are reported for tax purposes. The E3 form is a critical document used by businesses and self-employed individuals to declare their income and expenses. With the integration of the myDATA system, the process aims to streamline tax compliance by digitizing and automating the reporting of financial data to the Greek tax authorities.

The myDATA platform, which stands for 'my Digital Accounting and Tax Application', is designed to enhance transparency and efficiency within the Greek tax system. It requires businesses and individuals to upload their financial transactions directly to the tax authority's digital platform. This shift towards digital reporting is part of a broader initiative by the Greek government to combat tax evasion and improve fiscal accountability. As a result, understanding and adapting to these changes is essential for anyone engaged in economic activities in Greece.

Key Changes in Reporting Process

The introduction of the new E3 form alongside the myDATA system brings several changes to the tax reporting process. One of the most significant alterations is the requirement for real-time reporting of income and expenses. This means that businesses must now submit their financial data electronically, allowing for immediate verification and assessment by the tax authorities. Consequently, this reduces the potential for errors and omissions that could previously occur with manual submissions.

Another critical change is the granularity of data that must be reported. The new system demands detailed breakdowns of transactions, including specific categorizations of income and expenses. This level of detail ensures that the tax authorities have a comprehensive view of a taxpayer's financial activities, thereby facilitating more accurate tax assessments. Additionally, the system introduces new restrictions on what can be claimed as deductible expenses, necessitating a thorough understanding of the updated guidelines to remain compliant.

Implications for Expats and Investors

For expats and foreign investors, these changes present both challenges and opportunities. On one hand, the increased transparency and efficiency of the tax reporting process can simplify compliance for those who are well-prepared. On the other hand, the complexity and specificity required by the new system can be daunting for individuals unfamiliar with Greek tax laws. Expats and international investors must be particularly vigilant in ensuring that their financial data is accurately recorded and reported in accordance with the new regulations.

The potential for penalties due to non-compliance is a significant concern. Errors in reporting, whether intentional or accidental, can lead to fines and other legal repercussions. Therefore, it is imperative for expats and investors to seek professional guidance to navigate the intricacies of the new reporting system. Understanding these changes is crucial to maintaining compliance and avoiding unnecessary financial burdens.

How Ellytic Can Help

While Ellytic doesn't handle the new E3 form and myDATA requirements directly, many prerequisites — like obtaining your AFM or getting documents certified — are exactly what Ellytic streamlines. Ellytic's Identity Starter package provides essential services such as AFM (Greek Tax ID) registration, which are critical for accessing various systems in Greece. Additionally, Ellytic offers essential document translations, ensuring that all necessary paperwork is accurately prepared and submitted without the need for physical visits to authorities.

By leveraging Ellytic's services, clients can confidently manage their foundational requirements, mitigate the risk of errors, and focus on their personal or business endeavors in Greece. Learn more about how Ellytic can assist you in preparing for these new tax regulations at ellytic.com.

Conclusion and Next Steps

In conclusion, the implementation of the new E3 form and myDATA system represents a significant shift in Greece's tax reporting framework. For expats, investors, and business owners, understanding and adapting to these changes is essential to ensure compliance and avoid potential penalties. The detailed and real-time reporting requirements necessitate a proactive approach to financial management.

Seeking professional assistance is a prudent step in navigating these changes. By consulting with Ellytic, individuals and businesses can access the expertise and resources needed to successfully manage their foundational obligations. Don't leave preparation to chance—get started with Ellytic's services today to ensure a seamless transition to the new landscape.

Simplify Greece’s E3 & myDATA—Without the Stress

Greece’s new E3 Form and myDATA reporting can be confusing, especially if you’re navigating Greek tax bureaucracy as an expat. Ellytic helps you get set up and stay compliant—from AFM and Taxisnet to transfer of tax residence—so you can handle it all with confidence. Experience it yourself:

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Info:This article is for informational purposes only and does not constitute legal advice.

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About the Author

Lazaros Founder & Greek Market Expert

500+ CasesGreek Market ExpertFounder

I build digital pathways through Greek bureaucracy.
For individuals, relocators, buyers, investors, owners and heirs.
Designed for clarity, speed and legal certainty.
Ellytic exists because the system should finally work.

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