Greece Tax Authority uncovers €5.6 million in undeclared transactions in Q1 2026

Greece’s Independent Authority for Public Revenue, AADE, has uncovered more than €5.6 million in undeclared transactions following a nationwide wave of inspections during the first quarter of 2026.

The findings come after 8,000 on-site audits targeting sectors and regions with heightened risks of tax evasion, marking a significant escalation in enforcement efforts.

50,000 Violations Detected
According to AADE, approximately 50,000 tax violations were recorded between January and March, with a non-compliance rate of 33%.

Around 2,500 businesses were found to have failed to meet their tax obligations, with further investigations ongoing to assess their full fiscal activity.

The most common violations included:

• Failure to issue receipts
• Non-reporting of transactions to tax authorities
• Non-linking POS systems with cash registers
• Digital Tools Drive Enforcement

The inspections were guided by advanced data analytics and digital monitoring systems, including:

• Citizen complaint platforms
• The Appodixi mobile application
• AADE’s internal databases
• The myDATA digital accounting system
• The Digital Client Registry

Authorities used risk analysis and targeted cross-checks to identify high-risk businesses and suspicious transaction patterns.

Fines and Business Closures
Enforcement measures included both financial penalties and temporary shutdowns:

• 55 businesses were fined a total of €680,000 for failing to properly connect POS systems with tax registers
• 11 businesses faced additional financial sanctions for serious violations
• 93 businesses were ordered to suspend operations for two or more days due to repeated or extensive non-compliance

Officials emphasized that past tax behavior was also considered when determining penalties, with stricter measures applied to repeat offenders.

Ongoing Crackdown on Tax Evasion
AADE confirmed that inspections will continue at an intensified pace, leveraging real-time data cross-checking and digital tools to strengthen transparency and ensure fair market conditions.

“The audits are ongoing with increased intensity, using modern digital tools and real-time controls to enhance transparency and the proper functioning of the market,” the authority said in its statement.

The crackdown reflects Greece’s broader effort to combat tax evasion, improve fiscal compliance, and modernize its tax administration system.