A permit to work is a formal written authorisation controlling high-risk tasks, specifying the precautions required before work can safely begin.

A permit to work is a documented procedure that authorises specific high-risk work to proceed only once defined precautions are in place. Common examples include hot works, confined space entry, work on live electrical systems, and excavation near buried services. The permit records who has authorised the work, the controls required, and the time period for which it is valid.

Permits to work are a recognised way of managing particularly hazardous activities and support an employer's duties under the Health and Safety at Work etc. Act 1974 and related regulations. They ensure that hazards have been checked, controls confirmed, and responsibilities clearly assigned before work starts.

The permit is typically issued by an authorised person, signed by those carrying out the work, and formally closed when the task is complete or the permit expires, creating a clear audit trail.