Business Glossary
How to Calculate Total Headcount Cost UK
Total headcount cost is the full employer cost of your workforce — salary, National Insurance, pension, and other employment costs. It is typically 14–18% higher than combined salaries alone from April 2025.
The Formula
Total Headcount Cost = Σ (Salary + Employer NI + Employer Pension) for all employees
Worked Example — UK SME
A UK SME with 8 employees: combined salaries £268,000. Employer NI (approx 15% above £5,000 threshold): £38,400. Employer pension at 3%: £8,040. Total headcount cost = £314,440 (40.3% of £780k revenue).
UK Benchmark
📊 Staff costs as % of revenue benchmarks: Distribution 12–22%, Manufacturing 18–28%, Retail 15–25%, Professional services 35–55%, Hospitality 30–45%.
Common Questions
What is the employer NI rate for 2025/26?
15% on employee earnings above £5,000 per year. The threshold was reduced from £9,100 and the rate increased from 13.8%, effective April 2025.
How do I model the cost of a new hire?
Gross salary + employer NI (15% of earnings above £5,000) + pension (3% of qualifying earnings). For a £35,000 hire: NI = £4,500, pension = £1,050, total approximately £40,550.
At what revenue level can I afford to hire?
If a new hire costs £40,550 and gross margin is 40%, you need £101,375 in additional revenue just to break even on the hire.
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