When to Refer to Occupational Health (and When Not To): A Practical Guide for SMEs

Executive Summary

An Occupational Health (OH) referral is a structured way for employers to seek specialist advice on how an employee's health affects their ability to work safely and sustainably. It is most useful when there is uncertainty about fitness for work, adjustments, prognosis, or safety. For SMEs, timely and well-focused referrals help prevent risk, support fair decision-making, and provide clarity where medical or functional questions arise. However, many referrals are made too early, too late, or for the wrong reasons. OH isn't a disciplinary tool, a diagnostic service, or a substitute for good management conversations. This guide explains when a referral genuinely adds value, when it is unnecessary or premature, and what SMEs should do before escalating to OH.

What this means for your business

OH referrals are most useful when:

There is uncertainty about what duties are safe.
Symptoms are long-term, fluctuating, or complex.
The employee is struggling to sustain work or return after absence.
Adjustments are unclear, disputed, or have already been tried.
Safety-critical tasks may be affected.
There may be Equality Act implications.

An OH referral is not a medical diagnosis and not a legal requirement. It is a structured way to obtain specialist advice on functional impact and workplace adjustments.

Common misunderstandings include:

Thinking OH can diagnose.
Assuming a referral is needed for every absence.
Believing OH will 'approve' a management decision.
Treating OH as a performance tool.
Referring before any management conversation has taken place.

The most effective referrals are timely, proportionate, and grounded in clear questions. OH advice can inform decisions, but managers remain responsible for outcomes.

Legal and Statutory Requirements

Employers must consider reasonable adjustments for disabled employees under the Equality Act 2010. (Equality Act 2010, c.15)
Fit notes provide evidence of incapacity but do not prescribe specific duties or adjustments. (NHS, 2023)
Employers have a duty to protect employee health and safety, including when health conditions may affect safe working. (HSE, 2024)

OH referrals sit within this framework but are not legally mandated. They are a practical tool to support safe, fair decision-making.

What managers can do

OH referrals work best when they follow a few simple principles:

Start with a management conversation before escalating.
Be clear about what you need advice on, such as prognosis, adjustments, safety or capability.
Keep the referral focused on functional impact, not diagnosis.
Provide relevant context: duties, patterns, adjustments tried, and concerns.
Stay proportionate. Not every issue requires specialist input.

A good referral supports clarity, not complexity.

Examples

Long-term absence with unclear prognosis: An employee recovering from a cardiac event has been off for several weeks. The manager has discussed symptoms, reviewed the fit note, and explored temporary adjustments but remains unsure about stamina and safety. An OH referral is made with clear questions about functional capacity, adjustments, and likely timescales. This supports a safe, paced return aligned with medical advice.
Fluctuating mental health condition: An employee with anxiety and depression is attending work but struggling with concentration and consistency. The manager has already adjusted workload and reviewed progress. An OH referral is made to understand functional impact, recommended adjustments, and whether symptoms may meet Equality Act criteria. This ensures decisions are fair and well-informed.
Safety-critical role with new symptoms: A driver reports dizziness and fatigue. The manager immediately removes them from driving duties and seeks medical advice. An OH referral is made to assess fitness for safety-critical tasks and identify any restrictions. This protects both the employee and the organisation.

Common Pitfalls

SMEs often encounter avoidable issues:

Referring before speaking to the employee and potentially managing internally.
Expecting OH to diagnose or resolve performance concerns.
Providing insufficient information in the referral.
Treating OH advice as mandatory rather than advisory.
Using OH to validate a predetermined management decision.
Delaying referral until problems escalate.

Avoiding these pitfalls keeps the process efficient and supportive.

When to Consider Occupational Health Input

Uncertainty about what duties are safe after a management conversation.
Symptoms that are long-term, fluctuating, or complex.
An employee struggling to sustain work or return after absence.
Adjustments that are unclear, disputed, or have already been tried.
Safety-critical tasks that may be affected by a health condition.
Possible Equality Act implications.

Timely, focused referrals with clear questions get the best outcomes.

Bringing It All Together

OH referrals help SMEs make safe, fair and well-informed decisions when health affects work. They are most effective when used proportionately, after a management conversation and with clear questions about functional impact. Not every situation requires OH input. Many issues can be managed through good communication, temporary adjustments and short-term planning. A calm, structured approach helps referrals add value, support recovery and clarify what is safe and sustainable.

References

ACAS (2023) Managing sickness absence. Available at: https://www.acas.org.uk/recording-and-reducing-sickness-absence (Accessed: 11 May 2026).
ACAS (2023) Returning to work after absence. Available at: https://www.acas.org.uk/returning-to-work-after-absence (Accessed: 11 May 2026).
CIPD (2022) Occupational Health Factsheet. Available at: https://www.cipd.org/uk/knowledge/factsheets/occupational-health-factsheet/ (Accessed: 11 May 2026).
Equality Act 2010, c.15. London: The Stationery Office. Available at: https://www.legislation.gov.uk/ukpga/2010/15/section/20 (Accessed: 11 May 2026).
Faculty of Occupational Medicine (FOM) (2024) Ethics guidance for occupational health practice. Available at: https://www.fom.ac.uk/general-news/ethics-guidance-for-occupational-health-practice-9th-edition-now-free-to-access-online (Accessed: 11 May 2026).
HSE (2024) Sickness absence. Health and Safety Executive. Available at: https://www.hse.gov.uk/sicknessabsence/ (Accessed: 11 May 2026).
Gov.uk (2024) Fit notes: guidance for employers and line managers. Available at: https://www.gov.uk/government/publications/fit-note-guidance-for-employers-and-line-managers (Accessed: 11 May 2026).

OH Sam is a self-serve tool for practical workplace health support. It does not replace clinical, legal or specialist occupational health advice.