TL;DR: The 7 main HR functions — recruitment, training, performance management, compensation, employee relations, health and safety, and succession planning — form the backbone of every UK HR team. This guide explains what each function involves in practice, how they've evolved for hybrid work, and where UK employment law applies.
Introduction: Why the 7 HR Functions Still Matter (Especially for UK SMEs)
If you're an HR manager at a company with 50 to 500 employees, you'll know the feeling: one minute you're reviewing a job description, the next you're handling a disciplinary hearing, and somewhere in between you're supposed to be updating the staff handbook for the Employment Rights Act 2025. It's relentless.
That's exactly why the 7 HR functions framework is so useful. It gives structure to what can otherwise feel like an endless, reactive to-do list — and it helps you identify where the gaps are before they become problems.
The framework itself isn't new, but what each function looks like in practice has changed considerably. Hybrid working has reshaped how you recruit, manage performance, and support wellbeing. Rising employee expectations have raised the bar on everything from benefits to communication. And a raft of UK legislative changes means the legal stakes are higher than ever.
This guide walks through each of the 7 functions in plain English — what they involve, where UK employment law applies, and how they've evolved for the hybrid-work era. Whether you're building out your HR approach from scratch or sense-checking what you already have, this is your map.
The 7 Main Functions of HR at a Glance
The 7 main HR functions are: recruitment and selection, training and development, performance management, compensation and benefits, employee relations, health, safety and wellbeing, and succession planning. Together, they cover the full employee lifecycle — from attracting talent to developing and retaining it.
Different frameworks use slightly different labels. The 4 pillars of HRM — resourcing, development, reward, and employee relations — group the same activities at a higher level. The Harvard model of HRM, developed in the 1980s, takes a broader view still: it argues that HR policies should be shaped by stakeholder interests and situational factors, driving outcomes like commitment, competence, and cost-effectiveness. Both are valid frameworks, but for most working HR managers, the 7 functions model is the more practical starting point.
One reassurance worth stating upfront: you don't need a dedicated specialist for each function. In most UK SMEs, one or two HR managers cover all seven. The goal isn't perfection in every area — it's consistency and compliance across the board.
1. Recruitment and Selection
Recruitment is the process of attracting, screening, and hiring the right people for the right roles. It sounds straightforward, but it's one of the most legally exposed areas of HR practice.
Under the Equality Act 2010, job adverts, interview questions, and selection criteria must be non-discriminatory. That means no age-related requirements unless objectively justified, no questions about pregnancy or family plans, and no criteria that indirectly disadvantage protected groups. ACAS publishes practical guidance on recruitment best practice that's worth bookmarking if you're hiring regularly.
Post-pandemic, the function has changed in two significant ways. First, video interviews are now standard, which has opened up talent pools across UK regions — a genuine advantage for SMEs that previously competed only locally. Second, candidate expectations around process transparency have risen; people want to know where they stand and how long things will take.
A structured interview scorecard — where every candidate is assessed against the same criteria — is one of the simplest things you can do to reduce unconscious bias and protect yourself against tribunal claims. It takes an hour to build and can save you considerably more than that in the long run.
One practical note: during busy hiring periods, HR teams often find themselves fielding the same questions repeatedly — process timelines, role details, start date logistics. Handling these at scale is exactly the kind of task where an AI tool like Aura can take the load off, freeing you to focus on the quality of your selection decisions rather than inbox management.
2. Training and Development
Training and development covers identifying skills gaps across your workforce and providing the learning opportunities to close them. It's both a strategic function — building the capabilities your organisation needs for the future — and a legal one.
Under the Health and Safety at Work etc. Act 1974, employers have a duty to provide adequate training to ensure employees can work safely. In regulated sectors, mandatory training requirements go further still. This isn't optional, and it's not just a tick-box exercise — inadequate training is a common factor in workplace incidents and subsequent enforcement action.
The post-pandemic shift to digital and blended learning has been broadly positive for SMEs. Online learning platforms have made quality content more accessible and affordable. The challenge now is L&D budgets under pressure and the need to reskill employees for hybrid collaboration — not just technical skills, but the softer skills of working effectively across remote and in-person environments.
The CIPD's research consistently shows that organisations with strong learning cultures report higher retention rates. For SMEs competing with larger employers on development opportunities, this matters. You may not be able to match a corporate graduate scheme, but a clear, personalised development plan — linked directly to performance review outcomes — can be a genuine differentiator.
3. Performance Management
Performance management is the process of setting clear expectations, measuring output, giving feedback, and — when necessary — managing underperformance. Done well, it's one of the most powerful tools you have for driving engagement and results. Done poorly, it's one of the most common routes to an employment tribunal.
The ACAS Code of Practice on Disciplinary and Grievance Procedures is the key reference point here. Following it isn't optional — employment tribunals take non-compliance seriously. If a tribunal finds that an employer has unreasonably failed to follow the Code, it can award up to a 25% uplift on compensation (ACAS / Employment Rights Act 1996, as amended). That's a meaningful financial risk for any SME.
The annual appraisal is increasingly giving way to continuous feedback cycles, which is a positive development — but it creates new challenges in a hybrid environment. Informal corridor conversations don't leave a paper trail. If you're managing performance across a mix of remote and in-office employees, written records of feedback conversations, agreed objectives, and any concerns raised are essential. They protect both you and the employee if things escalate.
Performance management is one of the most time-intensive HR functions for lean teams, and it's one where consistency really matters. The same standards, the same process, applied fairly across the whole workforce.
4. Compensation and Benefits
Compensation and benefits covers the design and administration of pay structures, bonuses, and the wider employee benefits package. It's also one of the most heavily regulated HR functions in the UK.
The headline number for 2025: the National Living Wage rose to £12.21 per hour from April 2025 for workers aged 21 and over (GOV.UK / Low Pay Commission, 2025). Getting this wrong — even inadvertently — creates significant legal and reputational risk. The Employment Rights Act 2025 also removes the lower earnings limit for Statutory Sick Pay, extending SSP eligibility to lower-paid workers who previously fell outside the threshold (GOV.UK / Employment Rights Act 2025). If you haven't reviewed your payroll processes in light of this change, now is the time.
For employers approaching the 250-employee mark, it's worth noting that gender pay gap reporting is a legal requirement for organisations with 250 or more employees, under the Equality Act 2010 (Gender Pay Gap Information) Regulations 2017. Even if you're not there yet, building pay equity into your compensation framework now is far easier than retrofitting it later.
On the benefits side, the post-pandemic shift in employee priorities is real. Flexible working, mental health support, and financial wellbeing now rank alongside salary in what candidates and employees value. For SMEs, the good news is that you don't need a lavish perks package to compete — transparency about pay and genuine flexibility often matter more than a ping-pong table.
5. Employee Relations
Employee relations covers the ongoing management of the relationship between employer and employees — including grievances, disciplinaries, conflict resolution, and collective consultation. It's the function that most directly affects trust and culture, and it's where the legal stakes are highest.
A few key UK touchpoints. ACAS Early Conciliation is a mandatory first step before most employment tribunal claims — employees must contact ACAS before they can submit a claim, which gives employers an opportunity to resolve disputes without tribunal proceedings. Employees also have the right to be accompanied at disciplinary and grievance hearings by a colleague or trade union representative, under the Employment Relations Act 1999. And if you're considering collective redundancies — 20 or more redundancies within 90 days — statutory consultation obligations kick in, with significant penalties for non-compliance.
A clear, published grievance policy is your first line of defence and a legal requirement under the Employment Act 2002. It should be accessible to all staff — not buried in a handbook that nobody reads. For a practical guide to getting this right, our article on the ACAS Code of Practice on disciplinary and grievance procedures covers the key obligations in detail.
Post-pandemic, employee expectations around voice and fairness have risen. Hybrid work has introduced new friction points — proximity bias (where in-office employees get more visibility and opportunities), always-on culture, and the isolation that remote workers can experience. These aren't just wellbeing issues; they're employee relations issues, and they need active management.
This is also the function where human judgment is genuinely irreplaceable. A grievance conversation, a disciplinary hearing, a redundancy consultation — these require empathy, experience, and legal knowledge that no automated system can substitute for.
6. Health, Safety and Wellbeing
Health, safety and wellbeing covers the physical and psychological safety of your employees at work — and, increasingly, at home.
The legal framework starts with the Health and Safety at Work etc. Act 1974 and the Management of Health and Safety at Work Regulations 1999, which require employers to carry out suitable risk assessments. Crucially, the duty of care extends to remote workers' home working environments. A DSE (Display Screen Equipment) assessment is legally required for regular screen users — and that includes people working from home. Many SMEs overlook this, which creates both a compliance gap and a genuine risk to employee health.
The post-pandemic elevation of mental health as a core HR responsibility is backed by data. According to the CIPD Health and Wellbeing at Work Survey, stress, anxiety, and depression are consistently among the top causes of long-term sickness absence in UK workplaces. This isn't a fringe concern — it's a mainstream workforce management issue, and HR teams are increasingly expected to have a credible response to it.
For practical guidance on building a sustainable approach, our article on employee wellbeing support at scale covers how HR teams can extend their reach without burning out.
One thing worth noting: employees don't have mental health crises between 9 and 5. Aura can help here — signposting mental health resources, answering policy questions about EAP access, and escalating to HR when a situation needs human attention, at any hour and in any language. It's not a substitute for human support, but it ensures no one falls through the gap because they couldn't reach anyone.
7. Succession Planning and Talent Management
Succession planning is the process of identifying critical roles, developing internal talent pipelines, and preparing for leadership transitions. It's also, in many SMEs, the most neglected of the 7 functions — and understandably so, given the day-to-day pressures on lean HR teams.
The cost of neglecting it became very visible during the wave of resignations that followed the pandemic. Many organisations discovered they had single points of failure — roles where one person held all the knowledge, relationships, and institutional memory. When those people left, the disruption was significant. Succession planning is now a board-level conversation in many organisations that previously treated it as an optional extra.
The good news is that you don't need a complex system to get started. A simple exercise — "what would we do if this person left tomorrow?" — applied to your top five critical roles will surface the gaps quickly. From there, you can build targeted development plans to address them (which connects directly back to Function 2).
There's also a retention argument here. Employees who can see a clear development path within your organisation are more likely to stay. Succession planning and L&D aren't separate functions — they're two sides of the same coin.
How the 7 Functions Work Together (And Where AI Can Help)
The 7 functions aren't silos. They're deeply interconnected, and weaknesses in one area tend to create problems in others. A poor recruitment decision creates performance management challenges. Weak L&D feeds succession planning gaps. Uncompetitive pay drives employee relations issues. Getting the foundations right across all seven — rather than excelling in one or two while neglecting the rest — is what builds a genuinely resilient HR function.
For lean HR teams, the challenge isn't understanding what the functions are. It's having enough time to do them all well. When a significant portion of your week is spent answering the same policy questions — holiday entitlement, sick pay rules, parental leave processes — the strategic work gets squeezed out.
This is where AI support tools can make a genuine difference. Not by replacing HR judgment — that's not what they're for — but by handling the high-volume, repeatable queries that eat into your time. Think of Aura as the layer that manages the routine, so your HR team can focus on the functions that require human expertise: the difficult grievance conversation, the succession planning workshop, the performance review that needs real care. For a deeper look at what this means in practice, our article on how AI is changing HR for UK SMEs covers the landscape in detail.
The principle is simple: AI handles the repeatable; humans handle the irreplaceable.
Want to see how other lean HR teams are using AI to manage routine queries across all 7 functions? Download our UK HR Compliance Checklist — key legal obligations mapped to each HR function.
Conclusion: Building a Stronger HR Function in 2025
The 7 HR functions give you a clear map of your responsibilities — from hiring to succession — and each one carries specific UK legal obligations that you can't afford to overlook. The Equality Act, ACAS Codes of Practice, the National Living Wage, HSE requirements, the Employment Rights Act 2025 — these aren't abstract compliance concerns. They're the framework within which every HR decision you make needs to sit.
The post-pandemic, hybrid-work environment has raised the stakes on every function. Employee expectations are higher, the legal landscape is more complex, and the pressure on HR teams hasn't let up.
For SMEs, the priority isn't perfection. It's building solid, consistent foundations across all seven areas — and making sure you have the time and headspace to focus on the work that genuinely requires human judgment.
If your HR team is spending too much time answering the same policy questions and not enough time on the work that matters, Aura can help. Book a 20-minute demo to see how lean HR teams are using AI to handle routine queries at scale — and get back to the functions that need them most.
