ISO 45001 vs OHSAS 18001: What Changed and How to Transition
OHSAS 18001 has been withdrawn and replaced by ISO 45001:2018. This guide explains what changed, what''s new, and how to transition your OH&S management system.
Key Differences
| Aspect | OHSAS 18001 | ISO 45001 |
|---|---|---|
| Structure | OHSAS/BSI format | Annex SL (10 clauses) |
| Risk approach | Hazard-based | Risk and opportunity based |
| Leadership | Management representative | Top management accountability |
| Workers | Consultation only | Consultation AND participation |
| Context | Not required | Clause 4 context analysis required |
| Integration | Difficult | Easy (shared Annex SL with 9001/14001) |
Transition Steps
- Gap analysis (ISO 45001 vs current OHSAS 18001 system)
- Update documentation to Annex SL structure
- Implement new requirements (context, worker participation, outsourcing)
- Retrain internal auditors on 45001
- Run internal audit cycle
- Transition audit with your certification body