2 December 2026: end of the AI marking transition

Last window before mandatory machine-readable marking of existing systems, then high-risk systems in 2027.

2 December 2026 closes the transition period for machine-readable marking of generative systems already on the market.

Next, the timeline moves toward high-risk systems (recruitment, credit, education…). Each deadline is a reason to keep monitoring, not a one-off audit.

General information, not legal advice.

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2 December 2026: end of the AI marking transition

More guides

AI Act Article 50: what you must disclose

AI chatbot: the disclosure duty since 2 August 2026

AI Act fines: what you actually risk

Marking AI-generated content (C2PA, metadata)

Proving AI transparency: what an inspector may ask for

AI system register: what to record for your site

Crisp and AI Act Article 50: who must show the notice?