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EU AI Act vs GDPR: Key Differences Every Tech Company Must Know

April 22, 2026•6 min read

EU AI Act vs GDPR: Key Differences Every Tech Company Must Know

Many companies assume that GDPR compliance covers their obligations under the EU AI Act. It does not. The two regulations have different scopes, different requirements, and different enforcement mechanisms — but they often apply to the same systems at the same time.

Here is what you need to understand.

Quick Comparison

| | GDPR | EU AI Act |

|---|---|---|

| Focus | Personal data protection | AI system safety and rights |

| Who it covers | Anyone processing personal data of EU residents | Anyone placing AI systems on the EU market |

| Key obligation | Lawful basis for data processing | Conformity of AI system design and deployment |

| Main document | Privacy policy + DPA | Annex IV technical documentation |

| Max fine | €20M or 4% of global turnover | €35M or 7% of global turnover |

| Enforcement | Data Protection Authorities | National AI market surveillance authorities |

| In force since | May 2018 | August 2024 (phased) |

Where They Overlap

Both regulations apply when an AI system processes personal data of EU individuals. In practice, almost every high-risk AI system does this — an HR AI processes applicant data, a healthcare AI processes patient data, a credit AI processes financial history.

When both apply, you must satisfy both sets of requirements. GDPR compliance alone is not enough.

Example: A recruitment AI that uses a candidate's CV data must:

  • Under GDPR: Have a lawful basis (typically legitimate interest or consent), conduct a DPIA, and allow candidates to access/delete their data
  • Under EU AI Act: Prepare Annex IV technical documentation, implement human oversight, log all decisions, and disclose to candidates that an AI system is involved in evaluation

    • Where They Differ

    1. GDPR is about data. EU AI Act is about systems.

    GDPR focuses on how you handle data*. The EU AI Act focuses on *how you design and deploy AI systems, regardless of whether personal data is involved.

    A fraud detection AI that processes only transaction metadata (no names or identifiers) may not trigger GDPR but still triggers the EU AI Act if it makes consequential decisions.

    2. Different DPIAs vs Risk Management

    GDPR requires a Data Protection Impact Assessment (DPIA) for high-risk data processing. The EU AI Act requires a full Risk Management System throughout the AI lifecycle — broader in scope and more technically detailed.

    3. Data Subject Rights vs User Rights

    Under GDPR, individuals have rights to access, correct, delete, and port their personal data.

    Under the EU AI Act, individuals have the right to explanation* of AI decisions (Article 86), and in some cases the right to *human review of automated decisions affecting them (Article 14).

    4. Different Enforcement Bodies

    GDPR is enforced by Data Protection Authorities (in Germany: the BfDI and state-level LDAs).

    The EU AI Act is enforced by national market surveillance authorities — in Germany, this is expected to be overseen by a designated authority under the AI Office. The European AI Office coordinates at EU level.

    5. Higher Fines Under EU AI Act

    GDPR's maximum fine is €20M or 4% of global annual turnover.

    The EU AI Act's maximum fine for prohibited AI practices is €35M or 7%* of global annual turnover. For other violations: *€15M or 3%.

    What "Already GDPR Compliant" Gets You

    If you are GDPR compliant, you probably already have:

  • Data processing inventory (helpful for Annex IV data documentation)
  • Data retention policies (relevant for audit log requirements)
  • Privacy notices (a starting point for transparency disclosures)
  • DPIA process (useful background for AI risk management)

    • What you still need under the EU AI Act:

  • Annex IV technical documentation (model architecture, training data, performance)
  • Conformity assessment for high-risk systems
  • EU Declaration of Conformity
  • Audit logging of AI decisions (separate from GDPR audit logs)
  • Human oversight mechanism documentation
  • Shadow AI inventory (internal use of AI tools by employees)

    • Practical Next Step

    Run a free automated EU AI Act assessment to see what gaps exist beyond your GDPR compliance. It takes 5 minutes.

    Take the free audit →