Pension Salary Sacrifice Changes: What HR Needs to Know

If you use pension salary sacrifice, there’s a change coming that you should not leave until the last minute. From April 2029, a cap will apply to the amount of pension contribution that can benefit from salary sacrifice National Insurance savings. The good news is that you do not need to redesign everything overnight. The smarter move is to understand your current setup, calculate your exposure, and plan gradual changes while you still have time.

About the experts

Dan Mills is Partner and Creative Director at ilumiti. For more than 17 years, he has specialised in employee benefits communication, helping organisations improve pension engagement, benefits uptake and employee understanding through effective reward communications.

David Pugh is Managing Partner at ilumiti and one of the UK's leading employee benefits and pensions advisers. With more than 25 years' experience, he supports employers with pension strategy, salary sacrifice design, benefits governance and workplace financial wellbeing.

What the Change Means

This is not a limit on how much someone can pay into a pension. It is a change to the National Insurance treatment of pension contributions made through salary sacrifice. For example, if someone earns £50,000 and contributes 5% to their pension, that equals £2,500 a year. Under the new rules, only £2,000 would benefit from the salary sacrifice National Insurance saving. The remaining £500 would be subject to National Insurance. Employees can still contribute the same amount to their pension. However, employers could face higher National Insurance costs on contributions above the new cap.

Why Employers Need to Plan

The biggest direct impact is likely to fall on businesses. In the discussion, David modelled the impact for a company with 250 employees and average salaries of £56,000. In the example discussed, the additional employer National Insurance cost could be around £30,000 a year from April 2029. Actual costs will vary between employers. That is not a minor adjustment. It could affect budgets for recruitment, benefits, technology, or other business priorities. This is why the issue belongs on the HR and finance agenda now, not in 2028, when budgets and pay reviews may already be fixed. Planning early gives you time to model different options and avoid paying more for the same outcome.

How Employees May Be Affected

The impact will vary between employees. People contributing less to their pension may see only a small difference. In the example discussed, someone earning £50,000 and paying 5% into their pension could see an annual National Insurance difference of around £40. The impact will depend on an individual's earnings, contribution level and personal circumstances. Higher earners and employees making larger pension contributions may see a greater reduction in National Insurance savings. There may also be additional administrative complexity, particularly for higher-rate taxpayers who need to claim extra tax relief through self-assessment. That matters because pensions already feel complicated to many employees. If saving becomes harder to understand or less attractive, engagement could fall.

A Practical Way to Reduce the Impact

One possible approach is to phase changes through future pay rises. While this will not be right for every organisation, it may help some employers spread the impact over time rather than making a sudden change in 2029. For example, an employer could redirect part of future pay increases into pension contributions. This could gradually move the organisation from a structure such as:

  • 3% employer contribution

  • 5% employee contribution

towards:

  • 8% employer contribution

  • 0% employee contribution

The transition could happen over several years. For example:

  1. Redirect 1% of a pay rise into the pension in year one.

  2. Redirect another 1% in year two.

  3. Redirect another 1% in year three.

The exact approach will depend on each organisation’s pay and pension structure. However, the principle is straightforward: use time and normal reward cycles to make the change more manageable. This can help the business manage future costs while reducing the likelihood that employees perceive a reduction in the value of their overall reward package.

What HR Teams Should Review

This is not simply a payroll change. It is a wider reward and benefits decision. Before making changes, HR teams should consider:

Employee communications:

Can you clearly explain why part of a pay rise may be redirected into pension?

Linked benefits:

Could the change affect life cover, income protection, or other salary-related benefits?

Payroll administration:

Will the process be automated or handled manually?

Consistency:

Can the approach be applied fairly across the workforce?

Budget planning:

Can the change be incorporated into upcoming pay reviews and benefits cycles?

The goal should be to keep the new structure simple. A complicated pension policy can create confusion for employees and unnecessary work for HR and payroll teams.

What to Do Now

If your organisation uses pension salary sacrifice, start with a review:

  1. Calculate the potential additional employer National Insurance cost.

  2. Check how much your current pension structure relies on salary sacrifice.

  3. Consider whether future pay rises could support a gradual transition.

  4. Review the effect on related benefits.

  5. Prepare employee communications before any change is introduced.

The aim is not to make a major change tomorrow. It is to create more options for the future. Businesses that start planning now will have more time to assess their options, communicate clearly and make any changes in a considered way ahead of 2029.

Frequently Asked Questions

  • No. Salary sacrifice is not being removed. The change affects how much of it benefits from National Insurance savings.

  • Yes. Employees can continue contributing to their pensions. The change affects the National Insurance treatment of contributions above the cap.

  • Employers are likely to face the most significant direct financial impact, particularly those with larger workforces or higher average salaries. Higher-earning employees and those making larger pension contributions may also see a greater reduction in National Insurance savings.

  • In many cases, yes. Some employers may choose to use future pay rises to increase employer pension contributions as part of a gradual transition. The most appropriate approach will depend on the organisation's pay, pension and reward strategy.

Conclusion

The pension salary sacrifice change may feel distant, but it could create a significant cost if ignored. By reviewing your pension structure now, you can model the impact, plan gradual adjustments, and communicate changes more effectively. The earlier you start, the more flexibility you will have—and the less likely you are to face an expensive, rushed decision in 2029.

Important information: The information in this article is based on our understanding of the proposed changes at the time of writing and is intended for general information purposes only. The impact of any changes will depend on an organisation's specific circumstances, workforce profile and pension arrangements. Employers should consider seeking professional advice before making changes to their pension or reward strategy.

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