How Much Does It Cost to Employ Someone in the UK?

The cost of employing someone in the UK splits into three layers. First is the gross salary itself, plus any bonuses, overtime and benefits. Second is the mandatory employer cost on top: employer National Insurance contributions and, for eligible staff, workplace pension contributions under auto-enrolment. Third is everything else — recruitment fees, equipment, training, payroll software, insurance and workspace costs.

Most small businesses underestimate the second and third layers. HMRC sets the National Insurance and pension rules, and they apply from an employee's first payday, so it pays to model the full figure before you advertise a role. Our employee cost calculator does this for you in one step.

For 2026/27, employers pay Class 1 National Insurance at 15% on each employee's earnings above the secondary threshold of £5,000 a year. There is no upper limit, so the contribution keeps rising with salary.

On a £30,000 salary, employer NI is (£30,000 − £5,000) × 15% = £3,750 a year, or about £312.50 a month. On a £40,000 salary it is £5,250 a year. You report and pay it through PAYE alongside the employee's own deductions.

Our employer NI calculator shows the exact figure for any salary, including the monthly breakdown.

Under auto-enrolment, staff aged 22 to state pension age who earn at least £10,000 a year must be enrolled into a workplace pension. The minimum contribution is 8% of qualifying earnings, of which the employer must pay at least 3%.

Many schemes calculate contributions on a band of qualifying earnings set by the government rather than full salary, so check the current band on GOV.UK. If you pay 3% on a full £30,000 salary, that is £900 a year. Some employers contribute more as a benefit, and salary sacrifice arrangements can reduce the NI bill for both sides — our workplace pension calculator models the employer cost.

Here is the mandatory minimum cost for a full-time employee on £30,000 in 2026/27:

• Gross salary: £30,000
• Employer NI: (£30,000 − £5,000) × 15% = £3,750
• Pension at 3% of full salary: £900
• Total employment cost: £34,650 a year, roughly £2,887.50 a month

That is £4,650 — about 15.5% — on top of the headline salary before any overheads. If your business qualifies for the Employment Allowance, the £3,750 NI bill can be wiped out entirely, bringing the total down to £30,900. Run your own figures through the employee cost calculator to see both scenarios.

The Employment Allowance lets eligible employers reduce their annual employer NI liability by up to £10,500. For many small businesses with one or two modestly paid staff, that removes the employer NI bill altogether.

You claim it through your payroll software as part of your PAYE reporting, and HMRC's GOV.UK guidance lists the eligibility rules — for example, companies where the sole director is the only employee cannot claim. Because the allowance applies to the employer's total NI bill rather than per employee, one claim can cover the NI on several salaries.

Beyond the statutory minimums, realistic budgets include:

• Recruitment: job board fees, agency fees or your own time
• Equipment: laptop, phone, software licences, desk and chair
• Training and onboarding time
• Payroll costs: software or bureau fees, plus pension scheme charges
• Employer's liability insurance and any professional memberships
• Workspace, utilities and refreshments for office-based staff

The Apprenticeship Levy only affects larger employers: it charges 0.5% of an annual pay bill above £3 million, with a £15,000 allowance offsetting it. Most small businesses pay nothing, but GOV.UK explains how it works if your pay bill grows.

Follow these steps for any role:

1. Set the gross annual salary.
2. Subtract £5,000 and multiply the remainder by 15% to get employer NI.
3. Add pension contributions — at least 3% for eligible staff, more if you offer it.
4. Add one-off costs such as recruitment and equipment, spread across the year.
5. Add ongoing overheads like payroll software and insurance.
6. Check Employment Allowance eligibility and subtract up to £10,500 of NI if you qualify.

The result is your realistic annual cost. Dividing by 12 gives the monthly figure to check against cash flow, and our employee cost calculator automates steps 1 to 3.

The errors we see most often:

• Budgeting only for the gross salary and being caught out by the NI and pension on top
• Forgetting that employer NI has no upper earnings cap, so senior hires cost proportionally more
• Missing the auto-enrolment trigger: once an employee earns £10,000 or more, pension duties apply
• Assuming the Employment Allowance applies automatically — it must be claimed and some employers are excluded
• Ignoring part-year costs like statutory sick pay, maternity cover and holiday cover

Getting the number right upfront avoids painful surprises in month one of payroll.

A useful hiring budget separates statutory payroll costs from role overheads. For a £30,000 office employee, start with salary, employer NI and pension. Add recruitment cost, equipment, software, payroll administration, training time and workspace. For a remote employee, workspace may be lower but software, security and onboarding can be higher. For a field role, vehicle, tools, insurance and travel can dominate the non-payroll cost.

The first employee often costs more than the second because the business may need payroll software, employer’s liability insurance, HR documents, onboarding process and management time for the first time. An additional employee may share those systems, but still creates salary, employer NI, pension, equipment and training costs. Model first-hire setup separately from recurring per-employee cost.

An employee can be cheaper or more expensive than a contractor depending on utilisation, supervision, equipment, IR35 risk and continuity. Employees bring control, retention and availability, but add statutory costs and management duties. Contractors can flex capacity, but day rates are higher and disguised-employment risk must be managed. Compare annual contractor spend with total employee cost plus recruitment and ramp-up before deciding.