Salary Sacrifice Explained: A UK Employer's Guide

What is salary sacrifice?

Salary sacrifice (sometimes called salary exchange) is an arrangement where an employee agrees to give up part of their gross salary in return for a non-cash benefit provided by their employer. Because the benefit is taken from gross pay, before income tax and National Insurance contributions are calculated, both the employee and employer can make savings.

The arrangement works through a formal variation to the employment contract. The employee's contractual salary is reduced by the amount being sacrificed, and the employer uses that amount to provide the agreed benefit. It is not a deduction from net pay. It is a genuine reduction in gross salary, which is why it produces tax and NI savings for both parties.

For UK employers looking to stretch the value of their benefits budget, salary sacrifice is one of the most effective tools available. It allows businesses to offer more valuable benefits without increasing their total employment costs, and in many cases it actually reduces them.

Which benefits qualify for salary sacrifice in the UK?

HMRC rules determine which benefits can be offered through salary sacrifice. Not all perks are eligible, and the rules were tightened significantly in April 2017 when the Optional Remuneration Arrangements (OpRA) legislation came into force.

The following benefits still qualify for full tax and NI advantages under salary sacrifice:

• Pension contributions. The most common use of salary sacrifice. Additional employer pension contributions made through salary sacrifice are exempt from both employee and employer NI. This is the single most impactful salary sacrifice benefit for most workforces.
• Cycle to work schemes. Employees can spread the cost of a bicycle and cycling equipment over 12 months, saving tax and NI on the full amount. The benefit is worth more for higher rate taxpayers.
• Ultra-low emission vehicles (electric cars). Electric vehicle salary sacrifice schemes have grown rapidly since 2020. The benefit in kind rate for zero-emission cars is just 2% (2024/25), making this one of the most tax-efficient perks available.
• Childcare vouchers. Closed to new entrants since October 2018, but employees already enrolled can continue under the old scheme. New joiners are directed to the government's Tax-Free Childcare scheme instead.
• Technology schemes. Some employers offer laptops, tablets, or mobile phones through salary sacrifice. The rules here are more nuanced. Equipment provided primarily for work use is generally exempt, but personal-use devices may trigger a benefit in kind charge.

Before introducing any salary sacrifice arrangement, employers should confirm the benefit falls within HMRC's approved list to avoid unexpected tax liabilities. If in doubt, take advice from a payroll specialist or tax adviser.

How much do employees and employers save?

To put that in practical terms, consider an employee earning 35,000 per year who sacrifices 200 per month into their pension through salary sacrifice. As a basic rate taxpayer, they save roughly 56 per month in income tax and NI. Over a year, that is 672 in savings, or the equivalent of a 3.4% pay rise in pension value, without the employer spending a penny more.

For a higher rate taxpayer on 55,000 who sacrifices the same 200 per month, the saving is approximately 84 per month, or just over 1,000 per year.

Employers also save the 13.8% employer NI on the sacrificed amount. For a business with 50 employees each sacrificing 200 per month, the employer NI saving is around 16,560 per year. That saving can be used to fund additional benefits, offset administration costs, or simply improve the bottom line. Many employers choose to pass part of the NI saving back to employees as an additional employer pension contribution, which further increases the value of the scheme.

Understanding these savings is one of the most impactful things an employer can do when designing a benefits package. It is not just about tax efficiency. It is about making financial wellbeing benefits more affordable for everyone.

What are the risks and limitations?

Salary sacrifice is not suitable for every employee, and there are important limitations that employers need to communicate clearly.

• National Minimum Wage floor. Salary sacrifice must not reduce an employee's effective pay below the National Minimum Wage (or National Living Wage). For lower-paid staff, this limits how much they can sacrifice. Employers must check this on an ongoing basis, especially when NMW rates change each April.
• Impact on statutory pay. Because salary sacrifice reduces contractual salary, it can affect the calculation of statutory maternity pay, statutory sick pay, and statutory redundancy pay. Employees need to understand this before opting in, and employers should consider offering a mechanism to opt out temporarily when statutory pay becomes relevant.
• Mortgage and credit applications. Some mortgage lenders assess affordability based on contractual salary rather than total remuneration. An employee whose contractual salary has been reduced by salary sacrifice may appear to earn less than they actually receive in total value. This can affect mortgage offers. Employees should be advised to check with their lender.
• Student loan repayments. Salary sacrifice reduces the income figure used to calculate student loan repayments under Plan 1 and Plan 2. While this reduces repayments in the short term, it extends the repayment period. Whether this is a benefit or a drawback depends on the individual's circumstances.

None of these limitations are reasons to avoid salary sacrifice entirely. They are reasons to communicate clearly, give employees the information they need to make an informed choice, and review the arrangement regularly.

How to introduce salary sacrifice in your business

If you are considering offering salary sacrifice for the first time, the process is more straightforward than many employers expect. Here is a practical starting point.

• Choose the right benefit. Pension salary sacrifice is the most common starting point because it applies to the widest range of employees and produces the largest aggregate savings. Cycle to work and EV schemes are good additions once the core scheme is running.
• Take payroll and legal advice. You will need to vary employment contracts, update payroll processes, and ensure compliance with NMW rules. A payroll provider or HR adviser can handle this efficiently.
• Communicate the benefits clearly. Explain how the scheme works, what employees will save, and what the potential downsides are. Use real examples with actual numbers. Transparency builds trust and drives take-up.
• Give employees time to decide. Salary sacrifice is a contractual change. Employees should have time to consider it, ask questions, and opt in voluntarily. Avoid pressuring anyone into signing up.
• Review annually. Check NMW thresholds, assess take-up rates, and survey employees to understand whether the scheme is working as intended. Adjust as needed.

Salary sacrifice is a practical, proven way to increase the value of your benefits package while managing costs. For growing UK businesses, it is often the single most impactful change you can make.