The short answer
UK law does not require every small business to employ an HR manager. However, employer responsibilities begin with the first employee, including written particulars, pay, right-to-work checks, health and safety, pensions, data protection and fair treatment. The real question is who has the competence and time to manage those duties consistently.
What employers need to know
- Legal responsibilities apply even when the business has no HR department.
- The owner can manage HR, but should recognise when a case needs specialist support.
- Written processes become increasingly valuable as the team grows.
- Dismissal, discrimination, long-term sickness, redundancy and TUPE are high-risk areas.
A practical process
Cover first-employee essentials
Put payroll, written particulars, right-to-work evidence, insurance, pensions and health and safety in place.
Create consistent records
Keep secure contracts, leave, sickness, performance and employee-relations records.
Equip managers
Give managers clear policies, decision routes and access to advice before problems escalate.
Set escalation triggers
Agree which matters require qualified HR or legal input before action is taken.
Example
A five-person company may not need an employed HR manager, but it still benefits from reliable contracts, core policies and access to advice when absence or conduct issues arise.
When to take advice
Having fewer employees does not remove employment-law, equality, health-and-safety or data-protection obligations.
Frequently asked questions
At what size should a business have HR?
There is no universal headcount threshold. Complexity, growth and management capacity matter as much as employee numbers.
Can an accountant handle HR?
An accountant may support payroll, but employment documentation, employee relations and fair processes normally require separate HR expertise.
Official and primary sources
General information for employers in Great Britain, not legal advice. Check current official guidance and obtain advice for your circumstances.