Pensions Reform and Salary Sacrifice
What Employers Need to Know Now
By Stacey Radford, Senior Manager Payroll, Oakleaf Partnership
With expert insight from Alison Hills, Partner at Penningtons Manches Cooper
Salary sacrifice has long been a key feature of workplace pension arrangements, offering National Insurance savings for both employers and employees. However, with legislative change on the horizon and widespread misunderstandings around implementation, many organisations are now reassessing whether their arrangements are both compliant and future ready.
In a recent Oakleaf Partnership webinar, Alison Hills, Partner at Penningtons Manches Cooper, shared timely and practical guidance on how salary sacrifice works, where employers most commonly encounter risk, and how proposed reform from April 2029 could reshape pension strategy.
This article highlights the key insights and practical considerations every employer should be thinking about now.
Salary Sacrifice Explained
At its core, salary sacrifice involves an employee contractually agreeing to give up part of their salary in exchange for an increased employer pension contribution. This distinction is critical.
Employer pension contributions are not subject to National Insurance contributions, whereas employee contributions are. When salary sacrifice is implemented correctly, taxable earnings are reduced and National Insurance savings are achieved for both parties.
However, these benefits only apply where the arrangement is legally valid and properly documented.
A Common and Costly Risk
One of the strongest messages from the session was how frequently salary sacrifice is incorrectly implemented.
Selecting salary sacrifice through a pension provider does not in itself create a valid arrangement. For HMRC purposes, there must be a clear contractual variation confirming that the employee has agreed to give up salary in exchange for an employer contribution.
Where this is missing, employers may face underpaid employer and employee National Insurance liabilities, interest charges, and significant administrative costs. Salary sacrifice cannot be applied retrospectively, meaning historic errors can be expensive to correct.
Reviewing existing documentation now can prevent future exposure.
Default or Opt In Arrangements
Salary sacrifice can be introduced on a default basis or through employee opt in.
Default arrangements typically result in higher participation but place a greater responsibility on employers to communicate clearly. Employees must understand that they can opt out of salary sacrifice without opting out of the pension scheme entirely, as well as the potential impact on earnings linked benefits, mortgages, and statutory payments.
Clear communication is essential to avoid confusion and employee dissatisfaction.
Simple in Theory Complex in Practice
While salary sacrifice appears straightforward, there are several complexities employers must consider. These include compliance with National Minimum Wage requirements, implications during maternity leave, mortgage and earnings verification, and the risk of unintended consequences if arrangements are applied too broadly.
These issues are often overlooked, particularly where schemes have evolved over time without formal review.
The April 2029 Reform
The key driver behind renewed focus on salary sacrifice is proposed reform expected to take effect from April 2029.
Under the anticipated changes, only the first two thousand pounds per year of pension salary sacrifice will attract National Insurance savings. Any amount sacrificed above this threshold will be treated as an employee contribution for National Insurance purposes, even though it remains an employer contribution legally.
This effectively caps National Insurance savings for higher contributions, although income tax relief will continue to apply.
Key Questions from the Webinar
During the session, several practical questions were raised by employers. Below are the key themes and responses discussed.
What happens if employees refuse to accept contract changes
If an employee does not agree to a contractual change, their existing terms remain in force. Employers cannot impose salary sacrifice changes unilaterally – the employee must have the option to opt-out of salary sacrifice whilst remaining an active member of the pension scheme. In practice, this may require alternative benefit designs or maintaining legacy arrangements for some employees.
Do employers need to issue formal contract variations
Yes. A clear contractual variation is required for salary sacrifice to be valid. This may be included in the employment contract or set out in a formal variation or side letter. Informal communications or provider forms alone are generally not sufficient – legal advice should be sought if you have any concerns about the validity of the method and documentation used to implement existing salary sacrifice arrangements.
What are the risks of dismiss and re engage
Dismiss and re engage carries significant legal, reputational, and employee relations risks. While it may be lawful in limited circumstances, it should always be a last resort. Early planning and consultation are usually more effective.
How often can employers change terms and conditions
There is no fixed limit, but frequent changes increase legal risk and employee frustration. Changes should be justified, proportionate, and supported by appropriate consultation.
What Employers Should Be Doing Now
With several years before the changes take effect, employers have time to plan effectively. Key actions include reviewing current salary sacrifice documentation, identifying design features that may become unsustainable, considering contribution caps, planning employee communications early, and exploring alternative reward strategies such as enhanced employer pension contributions.
The clear message from the session was to act now rather than react later.
Final Thoughts
Salary sacrifice remains a valuable tool, but the landscape is changing. For employers, this is an opportunity to ensure compliance, reduce risk, and rethink how pension and reward strategies support both financial efficiency and employee wellbeing.
Watch or share the Webinar and Stay Informed
If you would like to explore these topics in more detail, you can watch the full Pension Reform and Salary Sacrifice webinar recording here
To stay ahead of future changes and receive invitations to our upcoming Pension Reform and Payroll events, please register your interest with the Oakleaf Partnership team. We regularly bring together industry experts to share practical insight and guidance on the issues that matter most to employers.
