Contractor Safety Checklist Before Work Starts

Before a contractor starts work, the organisation hiring them should confirm that the job is clearly defined, the contractor is competent for that job, the task and site risks have been assessed together, and the agreed controls can actually be used. The pre-start check should also name who authorises, supervises, stops and accepts the work.

The short answer

Check the scope, contractor competence, site and task hazards, risk assessment and work method, interfaces with normal operations, permits and isolations, equipment, emergency arrangements, induction, supervision, change control and handback. Do not treat insurance, a generic safety statement or a signed induction sheet as proof that the work is safe.

Why does a contractor pre-start check matter?

Contracting out a task does not automatically contract out the risks. A contractor may understand their specialist work but know little about the premises, people, equipment, traffic, utilities or operating restrictions around it. The host organisation may understand the site but not the contractor's tools, substances, sequence or temporary controls. The pre-start process brings those two risk pictures together before anyone is exposed.

This is relevant well beyond construction. Retailers, hospitality businesses, care providers, schools, public services and multi-site operators routinely bring in people to service refrigeration, maintain lifts, clean at height, repair roofs, work on electrical systems, manage pests, inspect fire equipment or alter plant. Even a short visit can introduce work at height, isolation, chemical, vehicle, asbestos, hot-work or public-interface risks.

The check should be proportionate to the work. Replacing a sealed office printer cartridge will not need the same controls as roof access, live electrical testing or opening pressurised pipework. Proportionate does not mean informal: the higher the potential consequence, the stronger the evidence, authorisation and supervision should be.

1. Define the job and its boundaries

Start with a scope that both parties understand. Vague instructions such as “fix the leak” or “service the unit” can leave critical decisions to the person arriving on site. Record:

the asset, area and problem to be addressed;
the work included and explicitly excluded;
planned start, duration, working hours and access route;
people, tools, vehicles, substances and equipment expected;
whether subcontractors will be used and who controls them;
the operating activities that will continue nearby;
shutdowns, service interruptions and business constraints;
who may approve a change to the work; and
what evidence is required before the job is accepted as complete.

A clear boundary also prevents “while you are here” work. If a new defect or additional task appears, pause and assess it instead of stretching the original approval to cover work that nobody planned.

2. Check competence for the actual task

Competence is the combination of skills, knowledge, training and experience needed for the work. Check it against the task and risk, rather than relying on a company name or a generic approved-supplier status.

Useful evidence may include relevant trade qualifications, licences or registrations where required, experience with the specific system, training for equipment and protective measures, previous performance, references and arrangements for supervision. Confirm who will attend: evidence for a senior engineer does not establish the competence of a trainee or subcontractor sent in their place.

Ask practical questions:

Who is the competent person leading the work?
Who may perform safety-critical steps or tests?
What level of supervision is required for trainees or less experienced workers?
Does the team understand the equipment, substances and energy sources involved?
Can everyone understand the instructions, warnings and emergency information?
Does the contractor have enough people and time to follow the agreed method?

Insurance, accreditation and procurement approval may support selection, but none of them replaces a task-specific competence check.

3. Exchange site and task risk information

The host should give the contractor information needed to work safely. Depending on the job, this can include:

known electrical, gas, steam, pressure, hydraulic or stored-energy sources;
asbestos information and any restrictions on disturbing the building fabric;
roof fragility, overhead services, underground services and confined spaces;
vehicle routes, loading activity and pedestrian or customer movement;
process hazards, hazardous areas and substances already on site;
fire precautions, alarms, evacuation routes and emergency contacts;
areas requiring authorisation, hygiene controls or security clearance;
vulnerable people who may be affected, including residents, patients, pupils or members of the public; and
other work taking place at the same time.

The contractor should explain the hazards their work introduces: noise, dust, fumes, sparks, temporary openings, trailing leads, mobile plant, access equipment, chemicals, disabled alarms, removed guards or interrupted services. The combined assessment must consider how these hazards interact with normal operations and other contractors.

Walk the area together for work where drawings, emails or a remote survey cannot show the real conditions. Verify access, clearances, ground condition, isolation points and escape routes. Record important assumptions so the team knows when the plan no longer applies.

4. Review the risk assessment and method of work

A contractor risk assessment or method statement should be specific enough to explain how this job will be completed safely at this location. A document copied from another site may miss the hazard that matters most.

Check that the method:

matches the agreed scope, site and people doing the work;
breaks the task into a logical sequence, including setup and removal;
identifies significant hazards at each stage;
uses controls in a sensible hierarchy rather than relying only on PPE;
specifies equipment, inspection, isolation and test requirements;
protects employees, visitors, customers and the public;
defines exclusion zones, barriers and temporary arrangements;
covers foreseeable abnormal events and emergencies;
sets stop-work conditions; and
is understood by the people who will follow it.

The host does not need to redesign specialist work, but it should challenge obvious gaps, contradictions and site assumptions. If either party doubts the arrangements, resolve the issue before work starts.

Recent HSE reminder

On 6 October 2026, HSE reported a prosecution after a trainee painter was fatally electrocuted while a fully extended ladder was moved near overhead power lines. HSE found that the work was not properly planned or supervised, the equipment and method were unsuitable, the electrical risk was not adequately assessed or controlled, and there were competence issues. The case enforced existing duties; it did not create a new rule.

5. Confirm permits, isolations and authorisation

Some work needs a formal permit or equivalent authorisation. Examples include hot work, confined-space entry, roof access, excavation, work on electrical systems, breaking containment, and maintenance requiring mechanical or process isolation.

A permit is not the risk assessment. It is a controlled authorisation confirming that specified conditions are in place for a limited task and time. Before issue, verify:

the exact equipment, area and work covered;
the isolations applied, lock ownership and test for dead or zero energy;
any draining, purging, cooling or depressurising completed;
atmospheric testing and rescue arrangements where relevant;
fire watch, alarms, detectors and extinguishing equipment;
barriers, signage and access control;
permit start, expiry, suspension and cancellation rules; and
who issues, accepts and closes the permit.

Never rely on a verbal statement that equipment is “off”. The agreed isolation procedure should identify every relevant energy source and require verification before work begins.

6. Induct, coordinate and communicate

Site induction should be relevant to the job and short enough to be understood. Cover the hazards and arrangements the contractor needs, including sign-in, restricted areas, traffic, alarms, first aid, welfare, incident reporting, emergency contacts and stop-work authority.

Name one host contact and one contractor lead. Agree how they will communicate during the work, especially across shift changes, breaks, remote sites or periods when the normal site manager is absent. Employees affected by the job should know what is happening, which controls they must respect and who to contact if conditions change.

Where several employers share a workplace, coordinate their activities. Check for incompatible work: hot work beside flammable cleaning, roof work above public access, electrical isolation during care activity, or delivery traffic crossing a contractor's exclusion zone.

7. Monitor the work and control change

Supervision should match the risk and the contractor's familiarity with the site. Monitoring does not mean standing over a specialist throughout the job. It means checking that the agreed arrangements remain in place and intervening where they do not.

Useful checks include:

the people and equipment on site match the approval;
permits and isolations remain valid;
barriers, housekeeping and public protection are effective;
the work follows the agreed sequence;
defects, incidents and near misses are reported promptly;
shift or personnel changes are handed over; and
new conditions trigger a pause and reassessment.

Stop the work if the method changes materially, an isolation is lost, unplanned substances or services are found, weather affects the controls, the public enters the work area, or the team cannot follow the plan. Record the decision, revise the assessment and obtain fresh authorisation before restarting.

8. Close out the job and hand the area back

Contractor control does not end when the tools are packed away. A structured handback should confirm that:

the work is complete or any temporary condition is clearly recorded;
guards, covers, alarms and fire protection are reinstated;
tools, waste, substances, barriers and temporary supplies are removed;
tests and inspections required before use are complete;
isolations are removed through the agreed process;
drawings, settings, certificates and maintenance records are updated;
residual risks and operating restrictions are communicated; and
the authorised host representative accepts the asset or area back.

Capture lessons while the work is fresh. Performance information should feed future contractor selection, planning and supervision. A good close-out records both problems and controls that worked well.

How should multi-site organisations manage contractor checks?

A central process can standardise contractor approval, minimum evidence, permit types, incident escalation and performance review. Each location must still assess its own hazards and operating conditions.

Use two linked records:

Organisation-level approval: identity, services, competence evidence, insurance where required, performance history, authorised subcontracting and review date.
Job-level authorisation: scope, site, people, task risk assessment, local hazards, work method, permits, contacts, monitoring and handback.

Do not let a current supplier record automatically approve every task. A refrigeration company competent for routine servicing may need different people, controls and evidence for roof work or electrical alteration.

Trend recurring issues across locations: late method statements, unapproved substitutions, permit breaches, poor handback, repeat defects or inadequate public segregation. Use those findings to improve procurement, site information and contract planning rather than treating every failure as an isolated local problem.

What are the legal duties and what is guidance?

Ireland: the Safety, Health and Welfare at Work Act 2005 places duties on employers to manage their undertaking so far as reasonably practicable without exposing people other than their employees to risk. Section 19 requires written risk assessment, including to the extent that duties apply to non-employees. Where employers share a workplace, section 21 requires them to cooperate, coordinate their actions and inform each other and relevant employees or safety representatives about risks.

HSA's safety and health management system guidance recommends contractor pre-qualification or review, project-specific risk assessments and an up-to-date Safety Statement, clear responsibilities and communication, induction, monitoring and incident arrangements. Those points are guidance for applying the law; the precise controls depend on the work and who controls it.

Great Britain: the Health and Safety at Work etc. Act 1974 includes duties to employees and people affected by an undertaking. The Management of Health and Safety at Work Regulations 1999 require suitable and sufficient risk assessment. Regulations 11 and 12 address cooperation and coordination in shared workplaces and information for outside undertakings.

HSE's Using contractors leaflet is guidance. It explains a practical process: identify the job, select a suitable contractor, assess risks, exchange information, cooperate, consult, manage and supervise. Construction work may also bring specific duties under the Construction (Design and Management) Regulations 2015; a general contractor checklist is not a substitute for applying those roles and requirements.

Northern Ireland: separate legislation and HSENI guidance apply. Organisations operating across the UK should verify the Northern Ireland requirements rather than assuming Great Britain regulations apply unchanged.

Where Fit2Trade fits

Fit2Trade Ensure can help teams connect risk assessments, responsibilities, actions and evidence across locations. The system supports the process; the organisation still needs competent people to select contractors, assess the real work, authorise controls and stop unsafe activity. Explore Fit2Trade Ensure or talk to the team.

Official sources

This article provides general operational guidance for organisations in Ireland and Great Britain. Apply the legislation, regulator guidance and competent professional advice relevant to the work, workplace and contractual arrangements.

What Should You Check Before a Contractor Starts Work?