When an employee is off sick, HR teams and line managers often face the same question: do we need a GP fit note, or should we send this person to occupational health? The occupational health vs GP fit note debate trips up even experienced managers, because the two serve different purposes and sit at different stages of a sickness absence. A fit note confirms whether someone is fit for work right now. An occupational health assessment digs deeper, looking at why someone is struggling and what adjustments might help them return safely. Understanding which one applies to your situation , and when you might need both , can save weeks of confusion, protect employee wellbeing, and keep your business compliant with UK and EU workplace health rules.
The Role of Occupational Health
Occupational health (OH) is a workplace-focused medical service. Unlike a GP, who treats the whole person and their general health, an occupational health physician or nurse looks specifically at how a medical condition interacts with someone's job. Their goal isn't to diagnose or cure , it's to advise employers on fitness for work, safe adjustments, and realistic timelines for recovery.
Employers typically arrange an occupational health referral when:
- An employee has been off sick for an extended period (often four weeks or more)
- Sickness absence is frequent or follows a pattern that raises concern
- A fit note recommends adjustments the employer isn't sure how to implement
- There's a workplace injury, a disability, or a condition needing specialist input on reasonable adjustments
- An employer needs independent medical evidence before making a decision about someone's role
OH reports go to the employer (with the employee's consent), not the GP. This is a key difference: occupational health exists to support the employment relationship, while a GP's duty is to the patient's personal care.
Occupational Health vs GP Fit Note: Side-by-Side Comparison
| Feature | GP Fit Note | Occupational Health Assessment |
|---|---|---|
| Issued by | NHS GP or hospital doctor (or a licensed telehealth doctor) | Occupational health physician or specialist nurse |
| Purpose | States whether someone is "not fit for work" or "may be fit for work" | Assesses the cause of absence and advises on adjustments and return-to-work plans |
| Who requests it | The employee, for their employer | Usually the employer, sometimes with employee agreement |
| Typical timing | After 7 consecutive days of sickness | During long-term or recurring absence, or before a workplace decision |
| Report goes to | Employee, who shares it with the employer | Employer, with employee consent required |
| Can it overrule the other? | Legally, no , but it can prompt an OH referral | No formal power to overrule a GP, but employers often weigh OH advice more heavily for workplace decisions |
| Confidentiality | Standard doctor-patient confidentiality | Governed by medical confidentiality and GDPR , reports usually summarise findings, not full medical history |
What Is a Fit Note
A fit note , officially called a "statement of fitness for work" , is the document a GP or hospital doctor issues in the UK once someone has been unwell for more than seven days. Before day seven, an employee can self-certify their sickness absence without any medical evidence at all, though employer policies sometimes ask for confirmation sooner.
The fit note replaced the old "sick note" system in 2010, and it works differently in one important way: it doesn't just say someone is off sick. It gives the GP two options:
- Not fit for work , the employee needs to stay off work for the stated period
- May be fit for work , the employee could return, possibly with adjustments
That second option is what makes the fit note genuinely useful for employers. A GP might tick "may be fit for work" and suggest a phased return, amended duties, altered hours, or workplace adaptations. The employer and employee then discuss whether those changes are practical. If they aren't, the fit note is treated as if it said "not fit for work."
Outside the UK, equivalents exist under different names , a "certificat médical" in France, an "arbeitsunfähigkeitsbescheinigung" in Germany, or simply a medical certificate in most EU countries and beyond. The principle is the same everywhere: a licensed healthcare professional certifies whether someone can work, based on a medical assessment.
3 General Rules of the Fit Note
Three rules govern how fit notes work in practice, and they matter whether you're an employee submitting one or an employer receiving it.
- Self-certification covers the first 7 days. No medical evidence is required for short absences. Employers can ask for a simple self-certification form, but not a GP note, during this period.
- A fit note is required from day 8 onward. Once absence extends past a week (including weekends), the employee needs a GP fit note or hospital note to continue receiving sick pay and to satisfy most employer sickness policies.
- Only a registered healthcare professional can issue one. This includes GPs, hospital doctors, and , since recent reforms , nurses, occupational therapists, pharmacists, and physiotherapists in some settings. Employers cannot demand a fit note from someone who hasn't seen a qualified professional, and equally, employees can't self-issue one.
These rules are designed to strike a balance: they reduce unnecessary GP visits for minor, short-term illness while still requiring proper medical evidence for anything more serious. HR teams that build these thresholds into their sickness absence policy tend to see fewer disputes over what counts as valid documentation.
Help Us Improve GOV.UK Guidance
If you've researched fit notes on GOV.UK, you've probably spotted the small "Help us improve GOV.UK" feedback prompt at the bottom of the page. It's a fitting reminder that even official UK guidance is a work in progress , and it's almost entirely written for a domestic audience. GOV.UK explains fit note rules under English and Welsh employment law, references Acas guidance, and assumes an NHS-based GP system. That's genuinely useful if you're a UK employer or employee, but it leaves a gap for everyone else.
Get Medical Certificate serves employees, HR teams, and travelers across Europe and beyond, and the reality is that "fit note" terminology simply doesn't translate everywhere. An employer in Ireland, Spain, or the Netherlands may need a comparable medical certificate but won't find it under a GOV.UK search. A remote worker for a UK company based in Germany still needs valid documentation, but their local doctor won't use the term "statement of fitness for work."
What matters internationally isn't the label , it's the substance. A valid medical certificate for work absence should always include:
- The date of assessment
- A statement of fitness (or lack of fitness) to work
- The expected duration of absence
- The issuing healthcare professional's credentials
- Compliance with local data protection law (GDPR across the EU/UK)
This is the gap that fast, licensed online medical certificate services fill , offering GDPR-compliant documentation recognised by employers, schools, and travel providers, without requiring an in-person GP visit that may not be available quickly, or at all, depending on where you live.
What Happens in an Occupational Health Assessment
An occupational health assessment is usually a one-off appointment, either in person, over the phone, or via video call. It typically lasts 30 to 60 minutes and follows a fairly predictable structure:
- Referral and consent. The employer submits a referral form outlining their concerns and questions. The employee must consent before the assessment goes ahead, and they have the right to see the report before it's sent to their employer.
- The assessment itself. The OH physician or nurse discusses the employee's medical history as it relates to their job, current symptoms, treatment, and how their condition affects specific work tasks , not their entire medical file.
- Workplace analysis. The assessor considers the physical and mental demands of the role: is it desk-based, physically demanding, customer-facing, shift work? This shapes what adjustments might realistically help.
- Recommendations. The report might suggest a phased return to work, temporary reduced hours, equipment changes, altered duties, or a referral to further specialist support.
- Follow-up. Some cases require a second assessment a few weeks later to check whether adjustments are working or if plans need revising.
Employers should treat the OH report as expert advice, not a binding legal instruction , but ignoring it without good reason can expose a business to claims if the employee later argues the employer failed in their duty of care around reasonable adjustments. For employees, it's worth knowing that OH reports are protected by confidentiality rules similar to standard medical records, and you can request corrections before your employer sees anything.
Frequently Asked Questions
Can occupational health overrule a GP sick note?
Not formally. Occupational health doesn't have legal authority over a GP's certification. But because OH assessments are more detailed and workplace-specific, employers often lean on OH advice when deciding on adjustments, phased returns, or longer-term employment decisions , especially if the two assessments seem to conflict.
When does an employee need a fit note?
Once sickness absence passes seven consecutive days, including non-working days. Before that, self-certification is enough for most UK employers. Policies vary by country and by employer, so always check your specific sickness absence policy.
Does an occupational health referral mean my employer thinks something is wrong?
No. Referrals are a standard part of sickness absence management, particularly for absences over four weeks or recurring patterns. They're meant to support your return to work, not penalize you.
Can I refuse an occupational health assessment?
You can decline, but your employer may then have to make decisions based on the medical evidence they already have, which could work against you if it's incomplete. Cooperating usually leads to a fairer outcome for both sides.
What if I can't get a GP appointment in time for a fit note?
This is increasingly common across the UK and Europe, where GP waiting times can stretch well beyond a week. In these cases, a licensed online medical certificate service can issue valid documentation quickly, reviewed by a qualified healthcare professional and compliant with GDPR.
What This Means
The occupational health vs GP fit note question really comes down to timing and purpose. A GP fit note answers a simple, immediate question: is this person fit for work today? Occupational health goes further, exploring the underlying reasons for absence and recommending practical adjustments so an employee can return safely and sustainably. Most employers need both at different points , a fit note early on, and an OH referral if absence becomes prolonged, recurring, or complex.
If you need a valid sick note, fitness certificate, or fit-to-fly document fast and can't get a timely GP appointment, get a licensed, GDPR-compliant certificate online from Get Medical Certificate today.