The 7 GDPR Data Protection Principles in Practice
Most teams can name GDPR. Far fewer can name the seven principles that decide whether their daily data handling is lawful. Those principles live in Article 5, and regulators treat them as the test every processing activity has to pass.
The gap matters because the principles are where enforcement lands. Cumulative GDPR fines passed EUR 7.1 billion since May 2018, according to the DLA Piper GDPR Fines and Data Breach Survey (January 2026). Most of those penalties trace back to a broken principle: data kept too long, collected without need, or processed without a lawful basis.
This guide walks through all seven principles, shows the habits that break each one, and points to interactive exercises your team can run to practice the right behavior.