How to Compare UK HR Systems and Cut a Shortlist to Three

Choosing an HR system is mostly a shortlisting problem. There are more than forty credible people systems selling into the UK small and mid-market, and on a feature grid they all look the same: employee records, holiday booking, documents, reporting, self-service. The differences that matter show up in statutory holiday handling, payroll integration, migration cost and what happens at renewal.

This guide is about comparing systems and cutting a shortlist to three. If you are earlier than that, and still deciding whether software or advice is the thing you actually need, read the buyer guidance on HR software providers first.

Start by naming the job the system has to do

Most disappointing implementations start with a demo rather than a problem. Write down the two or three things that are currently going wrong before you look at any vendor:

• Holiday requests live in email and nobody trusts the balances.
• Right-to-work documents are on a shared drive with no expiry alerts.
• You cannot answer "how many sick days did we lose last quarter" without a spreadsheet exercise.
• Onboarding paperwork gets chased manually every time someone joins.
• Payroll changes are re-keyed from one system into another every month.

A system that fixes those four or five specific things beats a system that scores well on ninety features you will never switch on.

The five comparison criteria that actually separate UK systems

1. Statutory holiday and absence handling

This is the single most common source of post-purchase regret. Ask the vendor to demonstrate, in the product and not on a slide:

• Accrual for irregular-hours and part-year workers, which changed for leave years starting on or after 1 April 2024.
• Holiday accrued during sickness and family leave.
• Bank holidays handled for part-time staff pro rata.
• Carry-over rules and a leave year that is not January to December.

A system built for the US market usually fails on at least two of these.

2. Payroll integration, and who owns the link

There are three real answers: native payroll inside the same product, a supported two-way integration with named payroll providers, or a CSV export. All three are workable. What matters is who fixes it when the link breaks mid-payroll. Get that named in writing.

3. Implementation and data migration

Subscription pricing is published; migration cost usually is not. Ask what the onboarding fee covers, whether historic absence and holiday balances migrate or only current-year data, how document uploads are handled in bulk, and how many hours of your own admin time the vendor expects you to contribute.

4. Data protection and access control

Your HR system holds special category data: sickness records, occupational health notes, sometimes ethnicity and disability data. Check where data is hosted, that manager access can be scoped to their own team, that there is an audit trail on record changes, and that you can honour a subject access request without exporting the entire database. Retention rules that automatically delete leaver data after a defined period save real work later.

5. Exit terms

Read the renewal clause before you read the feature list. You are looking for the notice window, the renewal uplift cap, whether the contract auto-renews, and whether you can export all your data, including documents, in a usable format on the way out.

What UK systems typically cost

Small-business systems generally sit in low single-figure pounds per employee per month for core HR, with modules for performance, recruitment or payroll priced separately. Two practical points:

• Per-seat pricing is often banded, so the price per head jumps at a threshold rather than scaling smoothly. Ask where your next band sits.
• Minimum seat counts mean a 12-person employer sometimes pays a 25-seat minimum. That can make a slightly pricier system the cheaper one.

Treat any published price as a starting point and quote your actual headcount, contract length and modules.

Cutting the shortlist to three

A workable process, and one you can run in a fortnight:

1. Write the problem list above, plus your must-have integrations.
2. Longlist six systems that serve UK employers of your size.
3. Score each against the five criteria, not against feature counts.
4. Demo three, and insist on seeing your own awkward case: the part-year worker, the leave year that starts in April, the manager who must not see the whole company.
5. Ask each finalist for a written implementation plan with dates and named responsibilities.
6. Check references at your headcount, not their flagship enterprise logo.

What software will not do

A people system stores facts and automates admin. It will not tell you whether a dismissal is fair, sit with you in a disciplinary hearing, or defend a tribunal claim. Employers who buy software to solve a live dispute are buying the wrong product. If casework or compliance risk is the pressure you are under, compare HR outsourcing or employment law support instead, and look at the shortlists in your city on the HR companies directory.

Sources and further reading

• Gov.uk guidance on holiday entitlement, including the irregular-hours rules that apply from April 2024.
• ACAS guidance on absence and sickness record-keeping.
• ICO guidance on employment practices and special category data.