Hiring your first employee costs more than the salary figure on the offer letter. In 2025/26, UK employers pay employer NI at 15% on earnings above £5,000, and must make minimum 3% pension contributions once the employee is auto-enrolled. Most first-time employers also qualify for Employment Allowance, which can offset up to £10,500 of employer NI. This page gives the true cost model with worked examples and the allowance calculation included.
UK scope: England, Scotland, Wales and Northern Ireland employer payroll planning for the 2025/26 tax year.
£43,363
£3,614 per month on £35,000 salary
£4,500
15% above £5,000 secondary threshold (2025/26)
£3,863
Baseline employer pension plus configured overheads
Employer NI
15% above £5,000 secondary threshold for 2025/26.
Auto-enrolment pension
Minimum employer contribution 3% on qualifying earnings.
Employment Allowance
Up to £10,500 relief in 2025/26 for eligible employers.
UK coverage only. Last reviewed: 04 April 2026. Estimates use 2025/26 assumptions and are for planning, not legal or tax advice.