Permit to Work Audit: What HSE Inspectors Actually Check

A permit to work audit is not something most contractors think about until an HSE inspector arrives on site or a principal contractor runs a compliance check. By that point, the gaps in your system are already there — the incomplete close-outs, the missing signatures, the permits that exist on paper but don't reflect what actually happened. A permit to work audit tests whether your system works in practice, not just whether the forms exist.

This guide covers what HSE inspectors actually look for, the most common findings that lead to enforcement action, and a practical checklist you can use to audit your own system before someone else does.

What an HSE Inspector Is Looking For

HSE inspectors assess permit-to-work systems against the principles in HSG250, which is the HSE's guidance document on PTW systems. They are not checking whether your permits look pretty. They are checking whether your system genuinely controls risk.

An inspector will typically: ask to see current live permits (if high-risk work is happening without a permit, that's an immediate concern); review a sample of completed permits for proper completion; cross-check permits against the work actually happening on site; interview workers about what precautions are in place; and check whether you can retrieve permits from previous months.

The Most Common Audit Findings

These are the issues that come up repeatedly in HSE inspections and principal contractor audits. If any of them sound familiar, they are worth fixing now rather than during an inspection.

Missing Close-Outs

The single most common failing. A permit is opened, the work is done, and nobody closes it. The close-out section sits blank — no confirmation the area is safe, no sign-off, no record of when the work finished. Under HSG250, the close-out is an essential part of the permit process. A permit without a close-out is an incomplete permit.

Permits Issued After Work Started

The permit is supposed to be the authorisation to begin. If the permit timestamp shows it was issued at 10:30 but the work started at 08:00, the permit is retrospective — and that defeats its entire purpose. Inspectors look at timestamps specifically for this.

Single Signatures

A permit signed only by the person doing the work (or only by the authoriser) is missing the dual-control mechanism that makes the system work. HSG250 requires both a permit holder and an authoriser. One signature means one person decided it was safe without an independent check.

Checklists Bulk-Ticked

When every box on the precautions checklist is ticked in the same pen, at the same angle, in one continuous motion, it is reasonable to conclude that nobody actually verified each precaution individually. Inspectors recognise this pattern immediately. It suggests the permit is being treated as a formality rather than a genuine safety check.

Open-Ended Validity

Permits marked "valid until further notice" or with no end time are non-compliant with HSG250 principles. Permits should have a defined validity period — typically one shift or one day. Conditions change, and a permit issued on Monday may not reflect the reality on Thursday.

No System for Tracking Active Permits

If nobody on site can tell the inspector how many permits are currently active, who issued them, or where the work is happening, the system lacks oversight. This is particularly important where multiple permits are active simultaneously — overlapping work in the same area can create compound risks that individual permits don't capture.

What Happens When Audits Find Problems

For minor issues, an inspector may give informal advice. For more serious matters, they can issue an improvement notice under Section 21 of the Health and Safety at Work etc. Act 1974, requiring you to fix a contravention within a set period (typically 21 days). If there is a risk of serious personal injury, a prohibition notice under Section 22 can stop work immediately.

In serious cases — particularly fatalities — PTW failings form part of the prosecution evidence. The HSE prosecutions register shows common patterns: no permit for confined space entry, isolation permits not followed, fire-watch not maintained after hot work. Fines can range from thousands to millions of pounds.

A Self-Audit Checklist

Run through this checklist quarterly. It takes an hour and will tell you whether your system would survive external scrutiny.

System Design

• Do you have written permit-to-work procedures that define when permits are required?
• Are permit types defined for each high-risk activity? (Our guides cover the specifics for hot work, confined spaces, working at height, and electrical isolation)
• Is there a defined list of who can authorise permits?
• Are authorisers trained and competent for the work types they are authorising?

Permit Completion

• Pull 10 completed permits at random. For each one, check:
  • All sections filled in (no blank fields)
  • Both signatures present (permit holder and authoriser)
  • Validity period defined and not exceeded
  • Precautions checklist individually confirmed (not bulk-ticked)
  • Close-out completed with signature and time
• If more than 2 out of 10 have issues, you have a systemic problem

Operational Checks

• Can you list all currently active permits right now?
• Can you retrieve a permit from 3 months ago within 5 minutes?
• Are permits stored securely? Do you review completed permits for quality, not just file them?

Making Your System Audit-Ready

The gap between "we have a permit system" and "our system would survive an audit" is usually about consistency. Three things close that gap: regular self-audits (quarterly, using the checklist above), accessible records (our guide to digital permit systems covers how digital tools solve retrieval), and supervisor accountability (the authoriser's signature must mean they actually inspected the area).

PermitPad: Built-In Audit Readiness

PermitPad is being built with audit compliance as a core feature, not an add-on. Every permit will have an automatic timestamped audit trail, mandatory fields that prevent incomplete submissions, and exportable records that you can hand to an inspector or principal contractor in seconds. Join the waitlist to be first in line when we launch.

Want to see where your current system stands right now? Try the free PTW readiness checker — it scores your setup against HSG250 in a few minutes.