Employer NI Savings from Salary Sacrifice, Who Benefits?

How Employer NI Saving Works

Employer secondary National Insurance is charged at 15% on employee earnings above the secondary threshold (£5,000 per year for 2026/27). When an employee sacrifices salary, their gross pay is reduced, and employer NI is calculated on the lower figure. For every £1,000 of salary sacrifice, the employer saves 15% × £1,000 = £150. This is a genuine cash saving for the business, not a deferral or redistribution, but an actual reduction in payroll tax.

The saving arises from the moment the salary sacrifice arrangement takes effect and recurs for as long as the sacrifice continues. For an employee sacrificing £5,000 per year, the employer saves £750 per year indefinitely. This is why employers, particularly larger ones, are genuinely motivated to offer well-structured salary sacrifice schemes: the financial benefit to the business of running the scheme can be substantial, especially for large workforces.

Do Employees See the Saving?

There is no legal obligation for employers to share their NI saving with employees. Many keep the full saving. However, a significant number, particularly larger organisations, financial services firms, professional services practices and technology companies, direct all or part of the saving into employees' pensions as additional employer contributions. This is known as NI matching or NI passthrough.

When an employer passes back 100% of their NI saving, the employee's pension receives the sacrifice amount plus the employer's NI saving. On a £5,000 annual sacrifice, the pension receives £5,750, the employee's net pay reduces by only the post-tax cost of the £5,000 sacrifice (approximately £3,400 for a basic-rate employee), and the pension receives £5,750. The ratio of pension input to net pay reduction is extraordinary.

The Maths for the Employer

For a 50-person company where each employee sacrifices an average of £5,000 per year into pension: employer NI saving = 15% × £5,000 × 50 = £37,500 per year. This is a recurring annual saving at no cost to the employees, in fact employees are better off as well. For larger firms the numbers scale proportionally: a 500-person company with the same average sacrifice saves £375,000 per year in employer NI.

These are material sums that justify the cost of establishing and administering a salary sacrifice scheme. Many employers choose to absorb the full employer NI saving as profit (or reinvest it in the business) rather than sharing it. But the best-designed schemes, particularly those competing for talent in professional services and technology, use the NI saving to fund enhanced pension contributions, which are a highly valued employee benefit at zero marginal cost to the employer.

Salary Sacrifice as a Retention Tool

The employer NI saving makes salary sacrifice one of the few employee benefits that is genuinely cost-neutral (or better) for the employer while being valuable to employees. This is why companies increasingly use salary sacrifice as part of a broader benefits suite, electric cars, cycle to work, technology schemes and pension sacrifice all combined. Employees who are using multiple sacrifice schemes build substantial locked-in benefits that make them less inclined to leave; replacement hires would have to rebuild those benefits from scratch.

When evaluating a job offer, the quality of the employer's salary sacrifice scheme deserves explicit consideration. Two offers at the same gross salary may have very different net costs depending on whether one employer passes back NI savings, matches pension contributions generously, and offers a broader scheme including EVs. Ask detailed questions in the recruitment process: it is a legitimate and increasingly expected area of scrutiny.