Greek tax authorities are stepping up enforcement against businesses that fail to comply with mandatory electronic payment and reporting systems. The Independent Authority for Public Revenue (AADE) is conducting intensive inspections targeting companies that have not linked their POS (Point-of-Sale) terminals with cash registers and the IRIS instant payment system.
Businesses found non-compliant face significant fines, with penalties set at €10,000 for single-entry bookkeeping businesses and €20,000 for those using double-entry systems. Companies that sell or support the relevant software may face even stricter sanctions, including potential revocation of their operating licenses. A 50% reduction in fines is available for businesses in small towns with populations under 500 or islands with fewer than 3,100 residents.
A notable case involves a business fined €20,000 for failing to properly connect its POS terminals with the tax-approved electronic cash register and e-invoicing provider. The company’s appeal, citing technical difficulties beyond its control, was rejected.
The IRIS system, mandatory since December 1, 2025, allows transactions via QR codes or mobile banking to be completed within seconds, transmitting data to the tax authorities in real-time. As of January 15, 2026, daily transaction limits were increased to €1,000 for both peer-to-peer transfers and professional payments.
AADE inspections focus on several key compliance areas:
- Ensuring cash registers are registered, active, legal, and meet Ministry of Finance standards.
- Verifying that POS terminals are properly linked to cash registers, so card payments automatically reconcile with receipts.
- Confirming transactions are transmitted in real-time to the tax system.
- Detecting any attempts to bypass or manipulate transaction reporting to myDATA.
Authorities warn that non-compliance will not be tolerated, signaling an ongoing effort to modernize Greece’s tax infrastructure, reduce fraud, and increase transparency across business transactions.
