MyDATA: Guide for Vacation Rental Managers in Greece

Greece’s tourism sector is modernizing fast—and so are its tax and accounting regulations. If you manage a vacation rental, hotel, or property business in Greece, you’ve probably heard about MyDATA. But what does it mean for your day-to-day operations, and how can you make compliance as simple and painless as possible?

In this comprehensive guide, you’ll learn everything property managers need to know about MyDATA, how it impacts invoicing and tax reporting, and how automation tools like Chekin can help you save time, stay legal, and focus on delivering an unforgettable guest experience.

What Is MyDATA and Why Does It Matter?

MyDATA stands for “My Digital Accounting and Tax Application.” It’s a mandatory electronic platform run by Greece’s Independent Authority for Public Revenue (AADE). MyDATA digitizes and standardizes the way Greek businesses report income, expenses, and tax documents—using structured “e-books” to track every transaction.

Who Is Affected by MyDATA?

• All businesses and self-employed professionals in Greece required to keep accounting records under Greek law
• Includes all property managers, vacation rentals, hotels, and agencies, regardless of size
• Covers B2B, B2C, and B2G transactions—so every invoice, receipt, and credit note must be reported

What Happens If You Don’t Comply?

• Minimum fines start at €5,000, or 50% of your total annual revenue (whichever is higher)
• Fines can double for uncorrected errors or repeat violations
• Non-compliance can put your business at risk of audits or even closure

Read more about:

AdvanceCM + Chekin: A Seamless Integration for Smarter Guest Management

Enhancing Guest Experience with Mobile Data Solutions

How MyDATA Works for Vacation Rentals

The Basics of MyDATA Integration

• Automated data capture: Your PMS (Property Management System) or solutions like Chekin collect booking and guest data automatically
• XML document creation: All invoices, receipts, and credit notes are generated in the required MyDATA XML format
• Secure transmission: Documents are sent directly to the MyDATA platform via a secure API, and confirmation codes (MARK) are received and logged for your records
• Supports full invoicing workflow: This includes VAT calculation, tourist and environmental taxes, credit notes, and corrections

Benefits of Automating MyDATA with Chekin

• Reduces manual data entry: No more entering information into multiple government platforms
• Saves time and reduces errors: Automatic data syncing means less risk of mistakes or missed deadlines
• Ensures real-time compliance: Confirmation codes and error tracking mean you’re always up to date with AADE’s requirements
• Simplifies audits: All your MARK codes and e-books are centralized for easy review

Manual Process vs. Automation: Why Modern Managers Choose Chekin

The Manual Way

Traditionally, property managers in Greece had to:

• Access both the MyDATA Timologio portal and the Short-Term Rental Property Register
• Manually submit declarations, invoices, and corrections
• Keep paper records and manage tax calculations themselves

The Chekin Way

Chekin automates the full MyDATA workflow:

• Pulls guest and booking data from your PMS (e.g., Guesty)
• Automatically generates and submits all required tax documents in XML format
• Tracks all compliance codes (MARK) in a single dashboard
• Supports corrections, VAT, and local tax management without manual intervention

MyDATA Technical Structure: What You Need to Know

• REST API integration: Chekin and similar tools use AADE’s secure API to communicate directly with the MyDATA platform
• E-books: Data is split into a Detailed Entries Book (every single transaction) and a Summary Book (monthly/annual totals)
• Certified providers: Always check that your solution is recognized by AADE and can handle the full MyDATA workflow

How to Get Started with MyDATA Automation in Chekin

1. Connect your PMS: Sync Chekin with your booking platform to automatically pull guest data
2. Configure your tax settings: Ensure VAT, city taxes, and other parameters are set up for Greek regulations
3. Activate MyDATA integration: Chekin will begin generating and submitting XML documents for every relevant transaction
4. Monitor your dashboard: Easily track submission status, confirmation codes, and any necessary corrections

Key Tips for MyDATA Compliance

• Stay updated: Tax rules can change, so keep your PMS and Chekin integration up to date
• Centralize documentation: Store all confirmation codes (MARK) and e-books for at least five years, as required by law
• Choose reliable providers: Use platforms (like Chekin) that offer AADE-certified integration and regular compliance updates
• Educate your team: Make sure your staff understands the basics of MyDATA and knows how to monitor submissions

Conclusion

MyDATA is transforming tax and accounting for property managers across Greece. While compliance can seem complex, automation tools like Chekin make it simple—saving you time, reducing risk, and letting you focus on what matters most: running a successful, guest-centric business.

With Chekin’s MyDATA integration, you can generate, submit, and track every invoice, receipt, and tax document with confidence. Embrace digital compliance and get back to growing your vacation rental business—secure in the knowledge that you’re always one step ahead.

Discover how Chekin can help you automate check-in, stay compliant, protect your property, and boost revenue—saving 87% of your time and earning more from every booking.

Free trial for 14 days. No credit card required!

You may also be interested in:

Unpack ’25: Key Travel Trends Reshaping Hospitality Management in 2025

Enhancing Your STR Business With Sustainable Travel Practices

Chekin & HNext Partner to Revolutionize Hospitality with AI Innovations