Salary Sacrifice Schemes UK: Complete Employer Guide for 2026

Salary sacrifice schemes are one of the most effective ways for UK employers to reduce payroll costs while offering employees genuinely valuable benefits. By restructuring part of an employee's pay as a non-cash benefit, both parties can save on Income Tax and National Insurance contributions. Yet many employers either avoid salary sacrifice because the rules seem complex, or implement schemes incorrectly and face HMRC scrutiny.

This guide explains exactly how salary sacrifice works, which benefits qualify for tax advantages, and how to set up compliant arrangements that benefit your business and your employees.

How salary sacrifice works

A salary sacrifice arrangement is a contractual agreement between employer and employee. The employee gives up part of their cash salary in exchange for a non-cash benefit provided by the employer. The key word is "contractual" — this must be a genuine change to the employment contract, not simply a deduction from pay.

When structured correctly, the sacrificed salary is not subject to Income Tax or employee National Insurance contributions because the employee never receives it as cash. The employer also saves on employer National Insurance contributions on the amount sacrificed.

The tax mechanics

Here is a simplified example showing how the savings work for a pension salary sacrifice:

The employee saves £240 in National Insurance, and the employer saves £450 in employer NI on the sacrificed amount. Many employers pass some or all of their NI saving back to the employee as an additional pension contribution, making the arrangement even more attractive.

Which benefits qualify for salary sacrifice

Not all benefits work well under salary sacrifice. The Optional Remuneration Arrangements (OpRA) rules introduced in April 2017 significantly limited the tax advantages for many benefits. Under OpRA, most benefits provided through salary sacrifice are taxed on the higher of the cash salary given up or the taxable value of the benefit.

However, several important benefits remain exempt from OpRA and retain their full tax advantages:

Benefits that still work under salary sacrifice

Pension salary sacrifice — the big one

Pension contributions through salary sacrifice remain the most popular and valuable arrangement. The savings are significant, especially after the employer NI rate increased to 15% in April 2025.

For higher-rate taxpayers, the savings are even larger. An employee earning £55,000 who sacrifices £5,000 into their pension saves £100 in additional-rate NI (2% above the Upper Earnings Limit) plus avoids 40% Income Tax on the full amount — though Income Tax relief on pension contributions is available through other methods too.

Setting up a salary sacrifice scheme

Step 1: Choose your benefits

Decide which benefits to offer through salary sacrifice. Focus on OpRA-exempt benefits for maximum tax efficiency. Pension sacrifice should be the starting point for almost every employer.

Step 2: Check National Minimum Wage compliance

A salary sacrifice arrangement must not reduce an employee's cash pay below the National Minimum Wage. This is a hard legal limit — you cannot sacrifice below it even if the employee wants to.

Calculate the employee's effective hourly rate after sacrifice and ensure it remains above the current NMW rate. For 2025/26, the National Living Wage (for workers aged 21+) is £12.21 per hour. Use our Payroll Tax Calculator to verify the numbers.

Step 3: Amend employment contracts

The salary sacrifice must be documented as a formal variation to the employment contract. The variation should state:

• The reduction in cash salary
• The benefit being provided in exchange
• The duration of the arrangement
• What happens if the employee wants to opt out
• Review or exit provisions (life events)

Step 4: Define opt-out windows

HMRC expects salary sacrifice arrangements to be binding for a set period, typically 12 months or aligned with the tax year. However, you should allow employees to opt out or vary their sacrifice in response to significant life events such as:

• Marriage or divorce
• Pregnancy or birth of a child
• Redundancy of a partner
• Significant change in working hours

These life event triggers should be specified in the contract variation.

Step 5: Update payroll processes

Your payroll system needs to reflect the reduced contractual salary. The sacrifice amount should not appear as a deduction on payslips — the gross pay figure should reflect the post-sacrifice salary. This is a common error that triggers HMRC queries.

Reporting requirements

Real Time Information (RTI)

Report the post-sacrifice salary through PAYE Real Time Information. The Full Payment Submission (FPS) should show the reduced gross pay figure, not the original salary with a deduction.

P11D reporting

Benefits provided through salary sacrifice that are OpRA-caught must be reported on the P11D. For exempt benefits (pensions, Cycle to Work, ultra-low emission vehicles), the reporting requirements depend on the specific benefit — pension contributions made by the employer are generally not P11D reportable.

P60 end-of-year

The P60 should reflect the actual salary paid after sacrifice, not the original contractual salary.

Common mistakes employers make

Treating sacrifice as a deduction. If payslips show the original salary with a deduction for the benefit, HMRC will argue there was no genuine sacrifice. The contractual pay must be reduced.

Ignoring NMW limits. Particularly for lower-paid employees, check that sacrifice does not reduce pay below the National Minimum Wage. This applies to each pay reference period, not just annually.

No contractual documentation. Verbal agreements or informal arrangements will not satisfy HMRC. Every sacrifice must be backed by a written contract variation.

Allowing unlimited flexibility. If employees can opt in and out at will, HMRC may argue the arrangement is not a genuine sacrifice. Stick to defined windows and life event triggers.

Forgetting about other pay calculations. Consider how salary sacrifice affects other pay-related calculations including statutory maternity pay, statutory sick pay, mortgage applications, and redundancy pay. Employees should be made aware of these implications before opting in. See our guide on statutory sick pay for more detail on this interaction.

Salary sacrifice and employer NI savings

With employer NI at 15% from April 2025, the savings from pension salary sacrifice are more significant than ever. For a business with 50 employees each sacrificing £3,000 per year:

Annual employer NI saving: 50 × £3,000 × 15% = £22,500

That is a substantial sum that can be reinvested in the business or shared with employees through enhanced pension contributions. The saving is even higher when factoring in the lower Secondary Threshold of £5,000, as more of each employee's pay is subject to employer NI. See our employer National Insurance guide for more on managing these costs.

Frequently asked questions

Next steps

Key takeaways

Salary sacrifice remains one of the most effective payroll strategies for UK employers, particularly for pension contributions where the tax and NI advantages are fully preserved. With employer NI at 15%, the financial case is stronger than ever.

Focus on getting three things right: proper contractual documentation, NMW compliance checks, and correct payroll processing. Get those in place and salary sacrifice becomes a genuine win for both your business and your employees.

Use our Payroll Tax Calculator to model the savings for your workforce, and review our National Insurance rates guide to understand the full NI landscape.