The true cost of an employee in the UK is almost always higher than their salary; as a rule of thumb, budget for roughly 1.2 to 1.4 times the gross salary once you add employer National Insurance, pension contributions, holiday pay, and overheads. For an employee on £28,000, that means a real annual cost closer to £33,000–£38,000.
This guide breaks down every component of that cost, gives you a UK formula with a worked example, and shows where shift-based businesses lose money without realising it.
Prefer to skip the maths? Use our free employee cost calculator to plug in your own numbers.
What makes up the true cost of an employee?
An employee's cost is the sum of what you pay them and everything it takes to employ them. In the UK, that breaks down into:
- Gross salary or wages: the headline figure, and usually the largest single line.
- Employer National Insurance: paid on top of salary, above the secondary threshold. As of April 2025, the employer rate is 15% and the threshold is £5,000.
- Pension contributions: under auto-enrolment, the employer minimum is 3% of qualifying earnings (the 2025/26 band runs roughly £6,240–£50,270).
- Holiday pay: every worker is entitled to 5.6 weeks' paid leave. For salaried staff this is already built into the annual figure; for hourly and shift workers it's a real add-on, commonly calculated at 12.07% of hours worked.
- Statutory sick pay and absence cover: from 6 April 2026, SSP is payable from day one, so absence costs land sooner than they used to.
- Recruitment and onboarding: advertising, agency fees, and the manager hours spent hiring and training.
- Equipment, software, and workspace: laptops, uniforms, tools, a desk or a locker, and the systems they use.
- Benefits: anything beyond the statutory minimum: private healthcare, bonuses, enhanced pension, and so on.
How do you calculate the total cost of an employee?
Add every cost of employing someone to their gross pay. A simple UK formula:
Total cost = Gross salary + Employer NI + Pension + Holiday pay (hourly staff) + Recruitment + Training + Equipment & overheads + Benefits
Worked example — a salaried employee on £28,000:
| Cost | Amount |
|---|---|
| Gross salary | £28,000 |
| Employer NI (15% above £5,000) | ~£3,450 |
| Employer pension (3% of qualifying earnings) | ~£650 |
| Statutory subtotal | ~£32,100 |
| Training, equipment, software, workspace | £1,000–£4,000+ |
| Realistic all-in cost | ~£33,000–£38,000 |
Statutory on-costs alone add around 15% to the salary. Overheads, recruitment, and benefits push the real figure higher, which is why the 1.2–1.4× rule of thumb holds up for most UK employers.
For hourly and shift workers, the same logic applies but holiday pay becomes a visible line: a worker on £12.71 an hour effectively costs more once you add 12.07% holiday pay, employer NI, and pension on top.
How much does it cost to hire a new employee in the UK?
Hiring costs fall into two buckets. Direct costs include job advertising, recruitment agency fees (often a percentage of first-year salary), background checks, and any pre-employment assessments. Indirect costs are harder to see but usually larger: the manager hours spent shortlisting and interviewing, plus the weeks it takes a new starter to reach full productivity.
For shift-based businesses that hire seasonally or rehire returning staff, the admin itself is a recurring cost, every new starter means paperwork, contracts, and onboarding before they're ready to work a shift.
Wage rates feed directly into hiring cost, so it's worth keeping an eye on the UK minimum wage rates that apply to each age band.
How much does it cost to replace an employee?
Replacing an employee combines the hiring costs above with the hidden cost of losing someone: lost productivity while the role sits empty, the drag on the rest of the team, and the ramp-up time for the replacement. Widely cited estimates put the total cost of replacing an employee at anywhere from half to twice their annual salary, rising for skilled or senior roles.
The takeaway holds regardless of the exact figure: retention is almost always cheaper than replacement. Predictable schedules, fair shift allocation, and clear communication reduce the turnover that drives these costs, particularly in hospitality and retail, where churn is high.
How can you reduce the cost of an employee without cutting pay?
You rarely reduce employee cost by paying less. You reduce it by removing waste, the overtime you didn't plan for, the overstaffed quiet shifts, and the admin hours that pile up around scheduling and payroll.
- Schedule to demand. Building rotas around actual demand stops you paying for cover you don't need. Businesses that do this typically cut labour costs by 5–10% without touching headcount.
- Track hours accurately. Estimated hours and forgotten clock-ins quietly inflate payroll. Capturing real hours means you pay for time actually worked.
- Control overtime before it happens. Seeing the cost of a shift as you build it is the difference between managing labour cost and discovering it at month-end.
- Keep good people. Every avoided resignation saves a full replacement cost.
The common thread is visibility. Most UK employers find out they overspent weeks after the money is gone, because their schedule and their costs live in separate places.
