Salary sacrifice is one of those things that sounds complicated. The name doesn't help. "Sacrifice" makes it feel like you're giving something up. But honestly, when used right, salary sacrifice can save both employees and employers a decent amount of money each year.
So in this guide, I'll break it down. What it is. How it works. What you can sacrifice. And what to watch out for. No jargon. No long lectures. Just the stuff you actually need to know.
Let's get into it.
What is Salary Sacrifice?
Salary sacrifice is an arrangement between an employee and an employer. The employee agrees to give up part of their gross salary. In return, they get a non-cash benefit of equal value.
That's it really. That's the whole concept.
The clever bit is in how the tax works. Because the employee is "sacrificing" salary before tax and National Insurance is calculated, both sides end up paying less to HMRC. Which means more money stays with the employee and the employer.
Sounds too good to be true? It's not. It's an HMRC-approved scheme that thousands of UK businesses use every day.
How Does Salary Sacrifice Actually Work?
Let me show you with a simple example.
Say Sarah earns £35,000 a year. She wants to put £200 a month into her pension. Without salary sacrifice, that £200 comes out of her net pay. So she's already paid income tax and NI on it.
With salary sacrifice, Sarah agrees to reduce her salary by £200 a month. Her employer then pays that £200 directly into her pension. Because the £200 never officially counted as her salary, it's not taxed.
End result:
- Sarah pays less income tax
- Sarah pays less National Insurance
- Her employer also pays less Employer's NI
- Her pension still gets the full £200
Everyone wins. Except HMRC really.
Common Things You Can Salary Sacrifice
Not everything qualifies for salary sacrifice. HMRC has a specific list of approved benefits. Here are the most common ones UK employers offer:
- Pension contributions: The most popular by far. Boosts retirement savings while cutting tax bills.
- Cycle to Work scheme: Get a bike (and gear) through your employer. Save up to 42% on the cost.
- Electric car schemes: Lease an EV through your employer. Tax savings can be huge here, sometimes thousands a year.
- Childcare vouchers: This scheme is now closed to new joiners, but existing users can still benefit.
- Workplace nursery places: If your employer runs or part-funds a nursery.
- Additional holiday days: Some companies let you "buy" extra leave through salary sacrifice.
- Technology schemes: Like laptops or phones for work-related use.
- Gym memberships: Less common, but some employers offer this, too.
The savings depend on the benefit, the employee's tax bracket, and the employer's setup. To get a clear picture of what you'd actually save in pounds and pence, the easiest thing is to use a salary sacrifice calculator. You just plug in your salary and the amount you want to sacrifice, and it shows your savings instantly.
How Much Can You Actually Save?
Let's run some real numbers.
Example 1: Pension salary sacrifice
- Employee earns £40,000 a year
- Sacrifices £3,000 into pension annually
- Tax saving: £600 (20% basic rate)
- NI saving: £240 (8% rate)
- Total annual saving: £840
Example 2: Electric car scheme
- Employee earns £50,000
- Leases a Tesla Model 3 through salary sacrifice
- Annual cost via salary sacrifice: roughly £400/month
- Saving versus personal lease: around £200/month
- Total annual saving: roughly £2,400
These are just rough estimates. Real savings depend on your salary, the benefits, and your tax position. But you can see how the numbers add up.
Benefits for Employees
Here's why so many UK workers love salary sacrifice when their employer offers it:
- Pay less tax and NI
- Get more value for your money: (especially on pensions and EVs)
- Easy to set up: usually just one form to fill in
- Spread cost: no big upfront payments for things like bikes or cars
- Boost long-term savings: pension salary sacrifice especially compounds over the years
It's basically free money you'd otherwise hand to the taxman.
Benefits for Employers
Employers benefit too. Sometimes even more than employees realise.
- Lower Employer's NI bills — saves up to 13.8% on every pound sacrificed
- More attractive benefits package — helps with hiring and retention
- Greater employee satisfaction — people feel taken care of
- Healthier workforce (Cycle to Work schemes, especially)
- Greener business image (EV schemes)
For a company with 50 employees all sacrificing into pensions, the NI savings alone can run into tens of thousands a year.
Things to Watch Out For
Salary sacrifice isn't perfect. There are a few things employees and employers should know before signing up.
1. Your gross salary drops
This sounds obvious, but it has knock-on effects. Mortgage applications, life insurance and some loans look at your gross salary. If yours has dropped because of salary sacrifice, lenders might offer you less.
2. Statutory pay calculations can change
Things like SMP (Statutory Maternity Pay), SSP (Statutory Sick Pay), and redundancy pay are based on your salary. A lower salary means lower statutory pay in some cases. Worth thinking about if you're planning a family or close to retirement.
3. National Minimum Wage rules
You can't sacrifice salary if it would take your pay below the National Minimum Wage. HMRC is strict on this.
4. Some schemes have closed
The childcare voucher scheme is closed to new joiners. Watch out for outdated info online about which schemes are still available.
5. It's a contract change
Salary sacrifice changes your employment contract. So both employer and employee need to agree in writing.
How to Set Up a Salary Sacrifice Scheme
If you're an employer thinking about offering salary sacrifice, here's the basic process:
- Pick the benefit: pension, EVs, cycle to work, etc
- Choose a provider: for pensions, this might be your existing pension scheme. For EVs, there are specialist companies
- Update employment contracts: you'll need a salary sacrifice agreement signed by each employee
- Update payroll: your payroll system needs to handle the sacrifice correctly so HMRC reporting stays clean
- Communicate it well: most employees won't sign up unless they understand the savings
That last point matters more than people think. Even great schemes fail if employees don't get how they work. Run a webinar. Send a clear email. Give them a calculator they can play with. Make it feel real.
Final Thoughts
Salary sacrifice is one of the easiest ways for UK employees to keep more of their money. And for employers it's a low-effort way to offer better benefits while saving on NI bills.
The key is understanding what you're signing up for. Read the small print. Check how it affects your statutory pay. Run the numbers properly before committing.
Once you've done that, salary sacrifice is genuinely one of the best-kept secrets in UK payroll. More people should be using it.
If you're thinking about it, start with pensions. It's the easiest scheme to set up, and the savings are immediate. From there, you can branch out into EVs, cycling and other benefits as your team grows.
Small change. Big impact. That's the magic of salary sacrifice when it's done right.