When does the EU AI Act apply and what are the key 2026 deadlines?

The EU AI Act (Regulation (EU) 2024/1689) entered into force on 1 August 2024 and applies in phases. Bans on prohibited AI have applied since 2 February 2025; governance and general-purpose AI (GPAI) obligations since 2 August 2025; the transparency rules since 2 August 2026; and, since the Digital Omnibus on AI (Regulation (EU) 2026/1744), the Annex III high-risk rules apply from 2 December 2027. High-risk systems embedded in already-regulated products have until 2 August 2028.

The EU AI Act does not switch on all at once. It entered into force on 1 August 2024, but its obligations phase in over roughly four years so organisations can prepare against a known calendar. The single date that matters most for compliance leaders is now 2 December 2027, when the Annex III high-risk obligations become applicable after the Digital Omnibus on AI (Regulation (EU) 2026/1744) moved them from 2 August 2026.

The phased timeline

2 February 2025: prohibitions on unacceptable-risk practices (Art. 5) and AI-literacy duties (Art. 4) apply. 2 August 2025: obligations for general-purpose AI models, the governance architecture (the AI Office and national authorities) and the penalty regime take effect. 2 August 2026: general application of the Regulation, including the Art. 50 transparency duties for systems such as chatbots and synthetic media. 2 December 2027: the Annex III high-risk system requirements apply. 2 August 2028: the deadline for high-risk AI embedded in products already covered by EU harmonised legislation (Annex I).

What this means for planning

Treat 2 December 2027 as the working deadline for any Annex III high-risk use case: recruitment, credit scoring, critical infrastructure, biometric identification and similar. Reaching it on time means an AI inventory, a risk classification per system, a conformity-assessment route, technical documentation and post-market monitoring all need to be in place beforehand, work that typically takes several quarters.

Expert view: the Act rewards organisations that build a management system rather than a one-off project. Mapping AI Act controls onto an ISO/IEC 42001 AI management system lets you demonstrate governance once and reuse the evidence across regulators, the same discipline CISOs already apply to ISO/IEC 27001.

Related Information

  • Legal basis: Regulation (EU) 2024/1689, in force 1 August 2024
  • Key applicability dates: 2 August 2026 (transparency), 2 December 2027 (Annex III high-risk)
  • Prohibited practices already apply (since 2 February 2025)
  • Maps cleanly onto an ISO/IEC 42001 AI management system

Expert Insight

The deadlines are fixed, but the workload is driven by how many high-risk systems you operate. Start the AI inventory now: most organisations discover more in-scope systems than they expected once they include vendor and embedded AI.

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