A risk assessment is not a document that should be completed once and then forgotten. Workplace conditions can change, new hazards can appear, and existing control measures may no longer be effective.
For HSE learners, one important skill is knowing when a risk assessment needs to be reviewed.
A review does not always mean starting the entire assessment again. In many situations, the purpose is to check whether the existing assessment still reflects the work being carried out and whether the controls remain suitable.
This article explains common risk assessment review triggers using practical workplace examples.
Why Risk Assessments Need to Be Reviewed
A risk assessment is based on the conditions and activities that exist at a particular time.
If those conditions change, the original assessment may no longer accurately describe the workplace.
For example, an office may introduce new electrical equipment, a warehouse may change its vehicle routes, or a construction site may introduce new machinery.
Reviewing the assessment helps identify whether these changes have introduced new hazards or changed existing risks.
For the wider risk assessment process, see our Risk Assessment Guide.
1. When There Is a Significant Change
One of the most common review triggers is a change to workplace activities or conditions.
Examples include:
- Moving to a different work area
- Changing production processes
- Introducing new working methods
- Changing workplace layouts
- Increasing or reducing staffing levels
- Changing operating hours
Example
A warehouse changes its layout and moves a pedestrian walkway closer to a forklift route.
The existing risk assessment may no longer reflect the new traffic arrangement.
The assessment should therefore be reviewed to determine whether additional controls are required.
2. When New Equipment Is Introduced
New machinery, tools, vehicles, or other equipment can introduce different hazards.
Example
An office replaces several desktop computers with larger equipment that requires additional electrical connections.
The workplace may need to review:
- Electrical arrangements
- Cable management
- Workstation layout
- Access around equipment
Similarly, introducing a new forklift into a warehouse could require a review of vehicle movement arrangements.
The important question is:
Has the new equipment changed the hazards or risks associated with the task?
3. After an Incident
An incident should prompt a review of the relevant risk assessment, particularly when the event indicates that existing controls may not have worked as expected.
Example
A worker slips while cleaning a wet floor.
The assessment should be reviewed to consider:
- What happened?
- Were existing controls followed?
- Were the controls sufficient?
- Did the working conditions differ from those considered in the assessment?
- Are additional controls necessary?
The purpose is not simply to update paperwork. The review should help identify opportunities to prevent similar events.
4. After a Near Miss
A near miss can also provide an important reason to review a risk assessment.
A near miss occurs when an event could have resulted in harm but did not.
Example
A forklift nearly collides with a pedestrian at a warehouse crossing.
Even if nobody is injured, the event may indicate that existing traffic controls are not working effectively.
The review could consider:
- Pedestrian segregation
- Visibility at crossing points
- Traffic routes
- Vehicle speed
- Warning systems
- Supervision
Near misses can therefore provide useful information before a more serious event occurs.
5. When Existing Controls Are Not Working
Controls should be reviewed when they are not producing the expected level of protection.
Example
A workplace uses warning signs to keep employees away from a restricted area, but workers repeatedly enter the area.
The issue may not simply be a lack of awareness.
The risk assessment could be reviewed to consider whether a stronger control, such as physical access restriction, would be more effective.
This is where the Hierarchy of Controls can help learners think beyond administrative measures and PPE.
6. When Work Activities Change
Even when equipment and locations remain the same, changing the way work is performed can create new risks.
Example
A cleaning team normally works during quiet evening hours. The schedule changes, and cleaning is now carried out while employees are still working in the building.
This could change:
- Pedestrian exposure
- Chemical exposure
- Slip risks
- Access arrangements
- Interaction between cleaners and employees
The assessment should be reviewed to determine whether the existing controls remain appropriate.
7. When New Information Becomes Available
New information about a hazard, piece of equipment, material, or work activity can also indicate that a review is necessary.
For example, updated manufacturer instructions may identify additional precautions for equipment already being used.
A review can determine whether existing procedures and controls still reflect the available information.
8. When Workplace Conditions Change
Environmental or physical changes can affect existing risks.
Examples include:
- Changes to lighting
- Changes to ventilation
- Construction or refurbishment
- Changes to access routes
- New storage arrangements
- Changes in workplace temperature
Example
An office undergoes refurbishment and temporary walkways are created.
The original assessment may not cover the new routes, temporary electrical cables, construction materials, or restricted access.
The assessment should therefore be reviewed before or as part of the change.
9. When a Control Measure Fails
A failed control is another important review trigger.
Example
A machine guard is repeatedly removed because it makes the task difficult to perform.
Simply instructing workers to keep the guard in place may not solve the underlying problem.
The risk assessment should consider why the control is failing and whether a different engineering or work-process solution is needed.
Effective risk management should address the reason a control is failing rather than simply recording that it was not followed.
10. At the Planned Review Date
Risk assessments should also have a planned review arrangement.
A review date can act as a reminder to check whether the assessment remains suitable.
However, a scheduled review date should not be treated as the only reason to review a risk assessment.
If a significant change, incident, near miss, or control failure occurs before the planned date, the assessment may need to be reviewed earlier.
Review Date vs Review Trigger
These two concepts are useful for new HSE learners.
Review Date
A planned point at which the assessment is checked.
Review Trigger
An event or change that indicates the assessment may need to be reviewed earlier.
For example:
Review date: 1 December
Trigger: New forklift introduced in September
The introduction of the forklift may require the assessment to be reviewed before December.
What Should You Check During a Review?
A review should consider whether the information in the assessment is still accurate.
Ask:
- Are the same activities being performed?
- Are the same hazards present?
- Have new hazards appeared?
- Have existing risks changed?
- Are existing controls still effective?
- Have incidents or near misses occurred?
- Has new equipment been introduced?
- Have working methods changed?
- Are additional controls required?
These questions help keep the assessment connected to actual workplace conditions.
A Simple Workplace Example
Consider an office risk assessment covering electrical equipment and trailing cables.
Original Situation
Employees use computers at fixed workstations.
Change
The office introduces additional equipment and rearranges desks.
Possible New Issues
- More electrical cables
- Different pedestrian routes
- Increased use of extension leads
- Changes to workstation layout
Review
The assessment should be checked to determine whether the existing controls remain suitable.
Possible improvements could include:
- Better cable management
- Additional electrical outlets
- Revised workstation arrangements
- Updated inspection procedures
This illustrates why a risk assessment should reflect the workplace as it exists today, not how it looked when the assessment was originally written.
Should Every Review Start From Scratch?
Not necessarily.
A review should first determine whether the existing assessment remains suitable.
If there have been no significant changes and existing controls remain effective, the assessment may simply require confirmation and an updated review record.
If conditions have changed significantly, parts of the assessment—or the assessment as a whole—may need to be updated.
The appropriate response depends on the nature of the change and the level of risk involved.
Common Mistakes When Reviewing Risk Assessments
Waiting Only for the Review Date
A scheduled date should not prevent an earlier review when an important change or incident occurs.
Updating the Date Without Checking the Controls
Changing the review date without considering workplace conditions does not demonstrate that the assessment remains suitable.
Ignoring Near Misses
A near miss can reveal weaknesses before an injury occurs.
Reviewing Paperwork Instead of the Workplace
The assessment should be compared with actual workplace activities and conditions.
Focusing Only on New Hazards
Existing hazards should also be reconsidered to determine whether their risks or controls have changed.
A Practical Review Trigger Checklist
Before confirming that a risk assessment remains suitable, ask:
| Review Trigger | What Should Be Checked? |
| Incident | What happened and did controls fail? |
| Near miss | What weakness allowed the event to occur? |
| New equipment | Has the equipment introduced new hazards? |
| Process change | Has the way work is performed changed? |
| Workplace change | Has the layout or environment changed? |
| Control failure | Are existing measures still effective? |
| New information | Has new safety information become available? |
| Planned review date | Does the assessment still reflect current conditions? |
This checklist can help learners recognise when a review may be appropriate.
Connecting Reviews to Risk Assessment Records
A risk assessment record should make it clear when the assessment was reviewed and, where appropriate, what prompted the review.
A structured Risk Assessment Template can help organisations record review information alongside hazards, existing controls, further controls, and action planning.
The review field is useful because it provides a clear record that the assessment has been reconsidered rather than simply left unchanged.
Why Regular Review Supports Better Risk Management
Reviewing a risk assessment helps keep safety controls aligned with workplace reality.
The goal is not to create more paperwork. It is to make sure that:
- Hazards are still correctly identified.
- Risks are still understood.
- Controls remain suitable.
- Changes are recognised.
- Lessons from incidents and near misses are considered.
For HSE learners, understanding review triggers is an important part of moving from simply completing a risk assessment to actively managing workplace risk.
Continue Your HSE Learning Journey
Knowing when to review a risk assessment is an essential workplace safety skill for students, supervisors, managers, and aspiring HSE professionals.
If you are building your understanding of risk assessment, explore the Risk Assessment Guide for the broader process, or review our resources on Hazard vs Risk and the Hierarchy of Controls to strengthen your understanding of risk identification and control selection.
For learners preparing for NEBOSH, IOSH, or other HSE qualifications, SFAST provides practical learning resources designed to connect safety theory with workplace situations.
Frequently Asked Questions
When should a risk assessment be reviewed?
It should be reviewed when significant changes occur, after relevant incidents or near misses, when controls are no longer effective, when new equipment or information is introduced, and at planned review points.
Does every incident require a complete new risk assessment?
Not necessarily. The relevant assessment should be reviewed to determine whether the incident reveals weaknesses or changes that require updates.
Should near misses trigger a risk assessment review?
A near miss can be an important trigger, particularly when it indicates that an existing control may not be working effectively.
Why is a review date important?
A review date provides a planned reminder to check whether the assessment remains suitable. It should not be the only reason for reviewing it.
What should be recorded after a risk assessment review?
The organisation should record appropriate review information, such as the review date, relevant changes or triggers, and any updates or further actions identified.