Compliance · September 2026 · 5 min read

Permit to work: what it is and when you need one

A permit to work is one of the simplest, most effective safety controls on a site - and one of the easiest to let slip. Here is what it actually is, which jobs need one, and how to run them without drowning in paper.

What a permit to work is

A permit to work is a formal, written authorisation to carry out a specific high-risk task, under agreed controls, for a set period of time. It is not permission in a vague sense - it names the job, the place, the hazards, the precautions, who signed it off and who is allowed to do the work.

It is a control, not a form

The point of a permit is the conversation it forces before anyone starts: has the area been made safe, are the isolations in place, does everyone involved understand the risk, and when does the work have to stop? The piece of paper is just the record of that check. Treat it as box-ticking and you lose the entire benefit.

Which jobs need one

Permits are used for tasks where the consequences of getting it wrong are severe. The common ones on a construction or maintenance site are:

• Hot works - welding, grinding, anything with a flame or spark
• Working at height
• Confined space entry
• Electrical isolation and live working
• Excavation
• Work involving asbestos
• Other general high-risk activities

Each of these carries different hazards, so each needs its own checklist - a hot works permit asks very different questions from a confined space permit.

What a good permit covers

• The exact task and its location
• The time window it is valid for
• The hazards and the controls that make it safe
• Any isolations or precautions that must be in place
• Who authorised it - and who accepted it to do the work
• Sign-off and close-out when the job is finished

Where paper lets you down

Paper permits get left in cabins, go missing, and give you no easy way to see what is open right now. When a client or the HSE asks "show me the live permits on this site today", a folder of forms is a slow and unconvincing answer.

Managing permits digitally

Handled properly, a permit runs through a clear lifecycle - requested, authorised, active, then suspended or closed - with the right checklist for its type and a full trail of who did what. Avelio Pro does exactly this: seven permit types, each with its own checklist, a proper authorisation and acceptance step, and close-out so nothing is left hanging.