Employer NI Cost Calculator

Employer National Insurance is one of the largest hidden costs of hiring staff in the UK. Unlike employee NI, which is deducted from wages, employer NI is an additional cost borne entirely by the business on top of the salary you pay. The changes introduced in April 2025 represent the most significant increase in employer NI costs in over a decade, and every business with employees needs to understand the implications for their payroll budgets and hiring decisions.

The April 2025 Rate Changes

From 6 April 2025, the employer NI rate increased from 13.8% to 15%, and the secondary threshold (the point at which employer NI starts being charged) dropped from £9,100 to £5,000 per year. Together, these changes mean that for an employee earning £30,000, the annual employer NI cost rose from approximately £2,884 to £3,750 -- an increase of over £860 per employee per year. For businesses with multiple employees, this adds up quickly and has a material impact on profitability and hiring capacity.

Employment Allowance: Who Qualifies and How to Claim

The Employment Allowance increased to £10,500 from April 2025, and crucially, the previous £100,000 employer NI bill eligibility cap was removed. This means that virtually all businesses with employees now qualify, except those where the sole employee is also a director. The allowance is claimed through your payroll software and offsets against your employer NI liability pound for pound. For a small business with a modest payroll, the Employment Allowance can eliminate employer NI entirely. If you are not currently claiming it, speak to your payroll provider immediately -- the savings are substantial.

How to Reduce Employer NI Costs Legally

Several legitimate strategies can reduce your employer NI bill. Salary sacrifice arrangements allow employees to exchange part of their salary for non-cash benefits such as pension contributions, cycle-to-work schemes, or electric car leases. Since the sacrificed salary is never paid, no employer NI is due on that portion. For a higher rate taxpayer sacrificing £5,000 into their pension, the employer saves £750 in NI (at 15%), and the employee saves both income tax and employee NI. The savings can be shared between employer and employee, making it a win-win arrangement.

Apprenticeship Levy

Businesses with an annual pay bill exceeding £3 million must pay the Apprenticeship Levy at 0.5% of their total pay bill. Each employer receives a £15,000 annual allowance to offset against the levy. The levy funds can be used to pay for apprenticeship training and assessment through a digital apprenticeship service account. While primarily a concern for larger employers, growing businesses approaching the £3 million threshold should plan for this additional cost. Understanding the full picture of employment costs helps you budget accurately and avoid surprises.

Structuring Your Workforce Efficiently

The increased employer NI rate makes workforce structure more important than ever. For company directors, the optimal salary level has shifted: with the secondary threshold at £5,000, many directors now set their salary at this level rather than the Personal Allowance threshold, taking the remainder as dividends to avoid employer NI entirely. Our income tax calculator can help you model different salary levels, and our payroll specialists can advise on the most efficient structure for your specific circumstances. Whether you need to restructure your payroll, implement salary sacrifice schemes, or simply ensure you are claiming the Employment Allowance correctly, professional advice in this area consistently delivers a strong return on investment.