Employer Cost Calculator 2026-27

The true cost of employing someone in the UK is significantly higher than their gross salary. Employers must pay employer National Insurance at 15% on earnings above £5,000, plus workplace pension contributions of at least 3% of qualifying earnings under auto-enrolment. These mandatory costs typically add 15-20% on top of the salary.

Additional statutory costs include the Apprenticeship Levy (0.5% of total payroll for employers with a pay bill over £3m), employer's liability insurance and workplace pension administration fees. Depending on the role, there may also be costs for recruitment, training, equipment and benefits.

This calculator totals all employer-side costs for a given salary level. It separates mandatory costs (employer NI, pension minimum) from optional costs you can add (private healthcare, bonus, training budget). The result shows the full loaded cost per employee.

The 'fully loaded' employee cost. Gross salary is just the headline. Add: Employer NI 15% on earnings above £5,000 (after April 2025); Pension auto-enrolment minimum 3% on qualifying earnings £6,240-£50,270; Apprenticeship Levy 0.5% if your total annual pay bill exceeds £3m; statutory paid holiday accrual (5.6 weeks); employer's liability insurance (~£100-£500/year); recruitment cost (10-20% of salary, amortised over typical 2-3 year tenure). Total overhead typically 15-25% above gross salary.

Hidden costs beyond statutory. Office space (~£500-£1,500/month per employee in London, less elsewhere). Equipment (laptop, phone, software licences ~£1,500-£3,000 one-off + ~£800/year SaaS). Training and development (1-3% of salary, often more for tech roles). Statutory sick pay (£123.25/week up to 28 weeks). Maternity/paternity pay (much reclaimed but cashflow impact). Management overhead (10-20% of salaried manager's time on each direct report).

Salary sacrifice as a cost-saving lever for BOTH sides. When an employee sacrifices £5,000/year into pension, the company saves: 15% NI (£750), 0.5% Apprenticeship Levy (£25), some auto-enrolment top-up if matched (varies). The employee saves: income tax (20-45%) plus employee NI (8-2%). Win-win on tax efficiency. Many employers share the NI saving back as an additional pension contribution to the employee — turning a 5% salary sacrifice into 5.75% pension contribution.

Contractor vs employee cost comparison. A £450/day contractor (£117,000/year if 260 working days) typically costs MORE than a £75,000 permanent employee (~£94,000 fully loaded) but with: zero training cost, no holiday/sick pay, no pension obligation, flexibility to release at end of contract, no redundancy liability. Most cost-effective when: short engagement (<6 months), specialist skill not needed long-term, or rapid scale-up. Less effective for stable long-term work — permanent is cheaper at full utilisation.