What Is Salary Sacrifice — And Why Your Employer Probably Wants You to Use It

The basic mechanic

Salary sacrifice is an arrangement where you agree to give up part of your gross salary in exchange for a non-cash benefit from your employer. Because the swap happens before tax and National Insurance is calculated, both you and your employer pay less.

The most common examples are pension contributions, cycle-to-work schemes, and — increasingly — electric vehicle leases.

Why employers like it

Every pound you sacrifice through a salary sacrifice arrangement saves your employer 13.8% in employer National Insurance contributions. That's real money. For a £10,000 salary sacrifice arrangement, your employer saves £1,380 per year.

This is why many larger employers actively promote salary sacrifice schemes — it's not purely altruistic. The incentive is built in.

The employee maths

Suppose your salary is £45,000 and you sacrifice £5,000 towards an EV lease. Your new taxable salary is £40,000.

• You pay 20% income tax on the sacrificed amount rather than 40% (if you'd otherwise be in the higher rate band)
• You avoid 2% employee National Insurance on that slice
• Your net cost is often 40–50% less than the headline lease price

What catches people out

Salary sacrifice reduces your "pensionable pay" and could affect mortgage applications (lenders look at your contract salary). It also reduces your state benefits entitlement if it takes you below the Lower Earnings Limit (£6,396 in 2025/26).

These aren't reasons to avoid it — they're reasons to understand it properly before you sign up.

The bottom line

For most employees, salary sacrifice is one of the highest-leverage financial decisions available through their employer. The system is designed to be tax-efficient. Use it.

For education and entertainment only. Not financial advice. Always check your specific circumstances with an independent financial adviser.