Employers and employees continually look for tax-efficient ways to structure remuneration. If you are asking “how does salary sacrifice work?”, you must understand the contractual mechanics, the current tax rates, and the specific benefits that still qualify for tax exemptions under UK law.
This guide breaks down the rules for the 2026/27 tax year, covering everything from electric vehicles to upcoming pension reforms.
What is a Salary Sacrifice Arrangement?
A salary sacrifice is a contractual arrangement where an employee gives up the right to future cash remuneration in return for a benefit in kind. To be effective for tax purposes, the employee must genuinely vary their employment contract to receive a lower cash salary before they earn the entitlement to the pay.
HM Revenue & Customs (HMRC) confirms that establishing these arrangements is a legitimate practice:
Salary sacrifice is commonly used by employers or employees to take advantage of the exemption from tax or NIC or both of certain benefits. It is important to recognise that employers and employees have the right to arrange the terms and conditions of their employment and to enjoy the statutory tax and NIC treatment that applies to each element in the remuneration package.
In April 2017, the government introduced the Optional Remuneration Arrangements (OpRA) rules, which withdrew the income tax and National Insurance advantages for most benefits provided through salary sacrifice. Under OpRA, the tax charge is based on the higher of the salary given up or the normal cash equivalent of the benefit.
However, Parliament specifically excluded several highly valuable benefits from the OpRA restrictions.
Which Benefits Still Work for Salary Sacrifice?
Because of the OpRA exclusions, you can still achieve full tax and National Insurance contributions (NICs) savings when you sacrifice salary for the following benefits:
- Employer Pension Contributions: Employer contributions to a registered pension scheme remain exempt from income tax. For the 2026/27 tax year, the standard Annual Allowance limits tax-privileged pension savings to £60,000.
- Ultra-Low Emission Vehicles (ULEVs): Cars emitting 75g/km or less of CO2 remain excluded from the OpRA rules. For the 2026/27 tax year, the Benefit in Kind (BiK) appropriate percentage for zero-emission electric vehicles (EVs) is highly attractive, set at just 4%.
- Cycle to Work Equipment: Employer-provided cycles and cyclist safety equipment remain entirely exempt from the OpRA restrictions.
The Financial Mechanics: Tax and NI Savings in 2026/27
When an employee sacrifices a portion of their salary, they lower their gross taxable pay. This mechanism reduces both Income Tax and Class 1 National Insurance liabilities for the employee, while the employer saves on secondary Class 1 NICs.
For the 2026/27 tax year, the relevant main rates are:
| Tax / Deduction | 2026/27 Rate | Thresholds / Notes |
|---|---|---|
| Income Tax | Basic: 20% Higher: 40% Additional: 45% |
These default rates apply across the UK, subject to devolved variations (e.g., Scotland). |
| Employee National Insurance (Class 1) | 8% (Main rate) 2% (Higher rate) |
The 8% rate applies to weekly earnings between £242 and £967. Earnings over £967 per week attract the 2% rate. |
| Employer National Insurance (Class 1) | 13.8% | Employers typically save 13.8% on the sacrificed amount, which they often pass on to the employee as an enhanced pension contribution. |
Strict Rules and Restrictions
While the tax benefits are clear, employers must navigate strict compliance thresholds when setting up a salary sacrifice scheme.
National Minimum Wage Limits
An employer cannot lawfully implement a salary sacrifice if it causes an employee’s cash pay to fall below the National Minimum Wage (NMW). From 1 April 2026, the National Living Wage rate for employees aged 21 and over is £12.71 per hour. If an employee works a standard 37.5-hour week, their post-sacrifice cash salary cannot drop below this hourly equivalent.
Upcoming Changes to Pension Sacrifice (April 2029)
The government has legislated a major reform to pension salary sacrifice schemes, taking effect from 6 April 2029. To limit the disproportionate NIC benefits enjoyed by higher earners, the government will restrict the National Insurance exemption.
From the 2029/30 tax year, any salary sacrificed for pension contributions that exceeds a £2,000 annual limit will attract both primary (employee) and secondary (employer) Class 1 NICs. The standard Income Tax relief for these contributions will remain completely unchanged.
Next steps for advisors: Review client employment contracts to ensure all salary sacrifice arrangements constitute a valid variation of terms prior to the earnings arising, and model the financial impact of the incoming 2029 NIC cap on high-earning clients.
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