HR Software vs HR Manager: What Does a Small Business Need?
Should you buy HR software or hire an HR manager? A cost and capability comparison for UK SMEs, including outsourced HR, with a clear decision framework by company size.
HR software and an HR manager are not competing alternatives - they do fundamentally different things. Software handles process and compliance administration. Humans handle judgment, relationships, and complex employment situations. The question for a small business is which combination you need at your current stage.
What Each Option Actually Delivers
HR Software (£50-200/month for 20 employees)
HR software is good at repeatable, rules-based tasks:
- Payroll calculations and HMRC RTI submissions
- Holiday request and approval workflow
- Absence tracking and reporting
- Auto-enrolment pension administration
- Document storage and e-signature
- Compliance alerts and reminders
- Onboarding checklists and document packs
- Basic reporting (headcount, turnover, absence rates)
HR software is not good at:
- Handling a grievance or disciplinary
- Performance managing a difficult employee
- Advising you on whether a dismissal is fair
- Redundancy consultation
- Managing a long-term sick employee
- Understanding the dynamics of your team
- Anything that requires a human conversation
In-House HR Manager (£25,000-45,000/year for junior-mid level)
A dedicated HR Manager does everything software cannot:
- Employee relations: grievances, disciplinaries, performance improvement
- Strategic input on culture, retention, and team structure
- Recruitment management and employer brand
- Policy development tailored to your business
- Management coaching and support
- Employment law advice in context (though not legal advice per se)
- TUPE, redundancy, and restructuring processes
- Onboarding that actually works (not just paperwork)
A HR Manager does also spend a significant portion of their time on administrative tasks that software would handle faster and more accurately.
Outsourced HR (£500-2,000/month retainer)
Outsourced HR typically provides:
- HR helpline for day-to-day questions
- Document templates (policies, letters, contracts)
- Case management support for disciplinaries and grievances
- A defined number of advisory hours per month
- Sometimes: tribunal insurance (employment practice liability cover)
Outsourced HR is not a substitute for an in-house person who knows your business. The advisor you speak to may change between calls, and they will not know the history or context of your team dynamics.
Cost Comparison
| Option | Annual Cost (20 employees) | What You Get |
|---|---|---|
| HR software only | £1,200-2,400 | Process, compliance, administration |
| HR software + outsourced HR (basic) | £7,200-10,400 | Above + advisory support for complex cases |
| HR software + outsourced HR (comprehensive) | £15,600-26,400 | Above + proactive HR support |
| Part-time HR Manager (2 days/week) | £17,000-22,000 | Dedicated person, knows your business |
| Full-time HR Manager | £35,000-50,000 | Full HR function in-house |
Note: outsourced HR costs vary significantly by provider and scope. These figures are indicative for a 20-person UK business in 2026.
The Hybrid Approach (Most Common for 10-30 Employees)
The most common setup for UK SMEs in the 10-30 employee range is:
HR software for all process and administration (payroll, holiday, absence, records, onboarding)
Outsourced HR or an employment solicitor on retainer for complex cases (disciplinaries, grievances, potential dismissals, redundancy)
This combination costs roughly £800-1,500 per month total and provides adequate coverage for most businesses at this stage. The outsourced provider handles the cases that need human judgment; the software handles everything else.
Decision Framework by Company Size
1-10 employees: Start with HR software and use ACAS's free resources or a one-off employment solicitor consultation for complex situations. You do not need a retainer at this size unless you are having ongoing people management problems - which itself is a signal worth addressing.
10-25 employees: HR software plus an outsourced HR retainer or employment law insurance with HR support. Budget £600-1,200 per month total. This is the stage where people management issues become frequent enough to warrant ongoing support.
25-50 employees: At this point, an outsourced HR retainer is often more expensive and less effective than a part-time HR Manager who knows your business. A two-day-per-week HR Manager at this size typically delivers better outcomes than a retainer at a similar cost.
50+ employees: A full-time HR Manager is almost always warranted. HR issues at this scale are frequent enough that a part-time or outsourced arrangement creates gaps and delays that are commercially damaging.
The Decision You Should Not Delay
The worst position is spending money on outsourced HR that could fund a part-time in-house person, or delaying an HR hire until a serious people problem forces your hand. Employment disputes are expensive - typically £10,000-50,000+ including legal costs and management time, even if you win.
Most small businesses underinvest in HR and then deal with the consequences reactively. Whether that investment is software, outsourced support, or a person depends on your size and complexity - but investing nothing is not a neutral choice.
This is guidance, not legal advice. Employment solicitors and ACAS can provide specific advice on your situation.
Related answers
Do I Need HR Software? A Small Business Guide
Not every small business needs HR software. This guide explains when manual processes work, when software pays off, and what the compliance risk of doing nothing actually is.
HR Outsourcing for Small Businesses: Costs, Benefits and Risks
What HR outsourcing costs for UK small businesses, what you get in a retainer, the risks to watch for, and how to decide between outsourced HR and an in-house hire.
When Should a Small Business Hire an HR Manager?
Clear trigger points for hiring your first HR Manager, what to look for, how HR Manager differs from HR Director, and realistic UK salary expectations for 2026.
Frequently Asked Questions
- Is HR software cheaper than an HR manager?
- Yes, significantly. HR software for a 20-person team costs £50-200 per month. A part-time HR manager costs £25,000-35,000 pro-rata per year (roughly £12,500-17,500 for two days per week). Outsourced HR retainers typically run £500-2,000 per month. Software handles process and compliance; a human handles judgment, employee relations, and complex cases.
- At what size should you hire an HR manager?
- Most small businesses hire their first dedicated HR person at 30-50 employees. Below that, a combination of HR software and outsourced HR support for complex cases is more cost-effective. The trigger is usually a pattern of people management issues, a significant employment dispute, or rapid hiring that stretches the founder's capacity.
- What can HR software not do that a HR manager can?
- HR software cannot handle employee relations - performance conversations, grievances, disciplinaries, redundancy consultations, or anything requiring human judgment and communication. It cannot build relationships with your team, spot cultural problems early, or represent you in an employment tribunal. These require a person.
- What does outsourced HR cost in the UK?
- Outsourced HR retainers in the UK typically cost £500-2,000 per month depending on headcount and scope. Per-call or per-case models start from around £100-200 per hour. Most include a helpline, document drafting, and a defined number of hours. Complex cases (redundancy, tribunal) usually cost extra.