Transitional period extended for ISO 45001 and ISO 50001

Transitional period extended for ISO 45001 and ISO 50001

In view of the impact of the Covid 19 crisis on the performance of on-site audits, IAF has extended the transition periods for all recently revised ISO management system standards by six months. The modified transition periods concern, among others, the ISO standards ISO 45001:2018 for occupational safety and health (OHSAS) and ISO 50001:2018 for energy management.

The decision to extend transition periods in connection with the revision of the ISO standards concerned is mainly due to the fact that a regular on-site audit activity is not possible or only possible to a greatly reduced extent in the foreseeable future due to the current situation. Under these circumstances, the requirement to meet the previously published deadlines was obviously considered inappropriate.

FROM BS OHSAS 18001 TO ISO 45001

The original regulation in the OHSAS area stipulated that all certificates according to BS OHSAS 18001 would lose their validity on March 11, 2021 and the transition to ISO 45001 must be completed.

► The new expiry date of the old BS OHSAS certificates has now been set to 30 September, 2021.

Also new is the deadline, which indicates until when OHSAS management systems can still be audited against BS OHSAS 18001. This date has been postponed from March 11, 2020 to September 30, 2020.

FROM ISO 50001:2011 TO ISO 50001:2018

For the energy management standard ISO 50001, the deadline for certificates according to the old version of 2011 was 20 August 2021.

► The new expiry date of the old ISO 50001 certificates has now been set to 20 February, 2022.

The deadline for auditing against this old version already expired on February 20, 2020. This period was not extended retroactively. Since this date, only audits against the new version, ISO 50001:2018, are possible.


Modern management systems for safety and health at work (OHSAS) have a number of tasks to fulfil. In addition to the improvement of occupational health and safety, and now with ISO 45001 also to a certain extent to the company health system, the focus is particularly on the consultation and participation of employees, as required by law in some countries, and the observance of other employee rights.

WHY ISO 45001 instead of BS OHSAS 18001?

The main reason for the development of ISO 45001 is the significantly improved possibility of embedding occupational health and safety in an existing integrated management system based on ISO standards. The common basic structure of all new ISO management system standards, the so-called High Level Structure (HLS), with its identical text modules and basic terms, which are supplemented according to the specific field of the standard, is the decisive factor here. In doing so, many of the requirements of BS OHSAS 18001, the world’s leading occupational health and safety standard until the publication of ISO 45001, served as a basis for content for the ISO standard, or were even adopted.

Read more about ISO 45001 and ISO 50001 by clicking on these links.

Article by Julian König, Expert at DQS GmbH

If you want to continue to read about the latest developments in the world of standards, and what’s new at DQS Group, please visit our social media channels


Source: DQS Holding website ( For more information, please send email to