Salary sacrifice for pensions is changing

Salary sacrifice has long been seen as one of those quietly powerful tools of the UK pension system. It’s fairly efficient, widely used and, for many people, a simple way to give their pension a boost without feeling the full impact on take-home pay.

However, in a few years’ time that is all set to change. From April 2029, the way National Insurance contributions are applied will change, placing a £2,000 annual cap on how much employee pension saving through salary sacrifice can benefit from National Insurance relief.

How salary sacrifice works

Salary sacrifice is an agreement between you and your employer. You give up part of your gross salary or a bonus, and your employer pays that amount straight into your pension instead.

Under the current rules, this structure reduces the employee’s taxable pay. As a result, Income Tax and National Insurance are calculated on the reduced salary amount. Employers also save on employer National Insurance contributions on the amount sacrificed, generally making salary sacrifice arrangements attractive on both sides.

Salary sacrifice has expanded in recent years, with close to two‑thirds of UK workers now using it. [1] It can be particularly useful for higher earners who make larger pension contributions.

What is changing from April 2029

From April 2029, the government will introduce a cap on the amount of employee pension contributions through salary sacrifice that can benefit from National Insurance relief.

Only the first £2,000 of employee pension contributions made via salary sacrifice each tax year will be exempt from National Insurance contributions. This cap applies solely to National Insurance. All pension contributions, including those above £2,000, will continue to be exempt from Income Tax, subject to the usual pension limits.[2]

Importantly, salary sacrifice arrangements themselves are not being abolished. Employers and employees can continue to use them, and employees can still contribute as much as they wish to their pension. The change affects how National Insurance is applied once contributions exceed the £2,000 annual threshold.

National Insurance treatment above the £2,000 cap

Where employee pension contributions through salary sacrifice exceed £2,000 in a tax year, the excess amount will be treated in the same way as other employee workplace pension contributions for National Insurance purposes.

This means that both employee and employer National Insurance contributions will apply to the amount above the cap. In practical terms, higher pension contributions through salary sacrifice will become less National Insurance efficient once the £2,000 limit is exceeded.

It is worth noting that all employer pension contributions will continue to be free of National Insurance contributions in full. The change applies only to employee contributions made via salary sacrifice.

What the change means for employees

For employees, the impact will depend almost entirely on how much is being sacrificed into a pension each year. Based on the latest data, 44% (roughly 3.3 million) of employees currently using salary sacrifice for pensions would be impacted by this measure.[3]

Employees can still contribute as much as they wish to their pension (subject to the usual pension limits), including through salary sacrifice, and all contributions will remain exempt from Income Tax, subject to the usual pension limits. The reform does not change the annual allowance or other pension tax rules.

Employees using salary sacrifice as part of wider tax planning, including for Child Benefit or Tax-Free Childcare purposes, may still be able to do so, although individual circumstances should be considered.

Employees will not need to contact HMRC or take action themselves. Employers will make the necessary payroll changes so that National Insurance is correctly applied to contributions above the threshold.

What the change means for employers

For employers, salary sacrifice pension arrangements can continue beyond April 2029. The key change is that only the first £2,000 of each employee’s sacrificed pension contributions will be exempt from National Insurance.

Employers will be required to report the total amount of salary sacrificed through their existing payroll software. HMRC has confirmed that it will engage with employers, payroll providers and other stakeholders ahead of implementation and will publish further guidance in due course.²

While the administrative burden is expected to be manageable, employers may need to update payroll processes, review communications to staff and reassess the overall cost and design of their pension arrangements. For some employers, particularly those that pass on National Insurance savings to employees as additional pension contributions, the economics of existing schemes may change.

Planning ahead for April 2029

While April 2029 may feel some distance away, for those affected it may be worthwhile to review your strategy in advance. For higher earners, it may become more important to consider the balance between salary sacrifice, personal contributions and other long term savings options.

The key takeaway is that salary sacrifice for pensions is not disappearing. Instead, it is being reshaped to reduce the National Insurance advantage for higher levels of employee contributions, while preserving Income Tax relief and the core structure of workplace pension saving. If you are unsure how these changes may affect you, speaking to a financial adviser is recommended.