Could salary sacrifice work for a smaller business?

Salary sacrifice is an agreement to reduce an employee's cash pay in return for a non-cash benefit. When that benefit is a car, the employee gives up an agreed amount of gross salary each month and gets the use of a vehicle instead. HMRC describes it in exactly those terms in its guidance for employers.

The employee agrees to change the salary itself through the employment contract. That is why the arrangement affects income tax and National Insurance on both sides. The employee is taxed on the car as a benefit in kind, and the employer pays employer's Class 1A National Insurance on that benefit value rather than standard Class 1 National Insurance on the gross salary given up. Because the benefit value is often much lower than the salary sacrificed, this can result in a net National Insurance saving for the business.

Whether the sums land in your favour depends on the vehicle, the salary, and the person. That is a conversation for your accountant, and I would rather you had it before you fall in love with a particular car.

The reason salary sacrifice keeps coming up in conversations about electric cars is a specific rule that does most of the heavy lifting. Under ordinary salary sacrifice rules, known as Optional Remuneration Arrangements, a benefit is valued at the higher of the salary given up or the standard benefit in kind charge. That usually cancels out most of the tax saving.

Cars are treated differently at the low-emission end. HMRC’s employer guidance states plainly that "for cars with CO2 emissions of no more than 75g/km, you should always use the earnings charge under the normal benefit in kind rules." In other words, a low-emission car sits outside that higher-of comparison, and the employee is taxed purely on the benefit in kind figure rather than on the salary they gave up.

For a fully electric car, the appropriate percentage used in that calculation is 4% for the 2026 to 2027 tax year, per HMRC’s appropriate percentage tables. A petrol or diesel car with higher emissions gets no such treatment, which is why almost every scheme you will be shown is built around electric vehicles.

The low percentage on electric cars is not permanent, and since a lease commits you for three or four years, this is one of the few bits of tax detail worth knowing before you sign. The government has already published the direction of travel.

The appropriate percentage for zero-emission cars is 4% in 2026 to 2027. It rises to 5% in 2027 to 2028, then by two percentage points per year to 7% in 2028 to 2029 and 9% in 2029 to 2030. The later increases are confirmed in HMRC's published policy for tax years 2028 to 2030.

The tax advantages can remain substantial, but a driver who has budgeted around today's figure should still factor in those changes. Work out the cost across the whole lease term. The first twelve months do not tell you enough.

The administrative side rarely makes it into the sales pitch, yet it decides whether a scheme is realistic for a business of your size. There are three things that genuinely matter.

The contract comes first. HMRC is clear that you set up the arrangement by changing the terms of the employee's employment contract and that the employee has to agree to the change. The contract needs to be clear about cash and non-cash entitlements at any given time. If someone opts in or out later, the contract changes again.

Keep an eye on the National Minimum Wage floor. A salary sacrifice arrangement must never take an employee's cash earnings below the National Minimum Wage. HMRC expects employers to have procedures in place to cap the deduction and ensure that never happens, including when minimum wage rates increase. For staff closer to the wage floor, this can rule out a scheme even if it works well for higher earners.

Then there is the reporting. A company car is reported to HMRC and attracts employer's Class 1A National Insurance on the benefit value. Because the employer no longer pays standard Class 1 National Insurance on the sacrificed salary, the arrangement can create an overall National Insurance saving for the business. Both rates are 15% for the 2026 to 2027 tax year, so the saving depends on the benefit value being lower than the salary given up.

Two situations cause most of the trouble I hear about, and both are easier to deal with before the vehicle is ordered. Plan for both in advance.

An employee leaving partway through the term is the first risk to plan for. The lease sits with the business, and the employee leaving does not automatically end its commitment. Some schemes carry early termination protection, some let you reassign the vehicle and some leave the business facing a termination charge or ongoing payments. The difference in cost is real. In a small business, one departure is a significant event.

A change in pay is the other. Since the sacrifice is a reduction in gross salary, it can affect anything calculated from salary, including pension contributions, statutory pay and personal borrowing assessments. Your payroll adviser can tell you which of those apply in your case.

Salary sacrifice can work perfectly well in a small business, and the barrier is usually appetite for the admin rather than headcount. HMRC guidance sets no minimum headcount, and employers do not have to seek HMRC approval before putting an arrangement in place, though HMRC will not comment on a proposed arrangement before it is active.

In practice, it tends to fit where you have salaried staff comfortably above minimum wage, a genuine reason to offer a car, and either a payroll provider or an accountant who is happy to handle the mechanics. It fits less well where pay is close to the wage floor, where staff turnover is high, or where the vehicle is really doing a job rather than being a benefit—in which case a straightforward business lease is usually the simpler answer.

My own view, having had this conversation a number of times, is that people arrive expecting a yes or no and leave with a clearer picture of what they would be taking on. You can see how I work on the services page, and the first conversation is free.

I handle the vehicle, and your accountant handles the tax. That division matters because I am a vehicle specialist, not your tax adviser.

My side is the practical work: which cars are available on sensible lead times, what a realistic monthly figure looks like across the term you are considering, which funders will support the arrangement, and how the order gets managed through to delivery. If a low-emission car is a poor fit for the mileage or the driving pattern, I will tell you that before the tax question is even worth asking, because a scheme built on the wrong vehicle is a bad scheme regardless of the percentages.

Your accountant’s side is your specific position: the effect on each employee, the net National Insurance treatment, how it interacts with pension arrangements, and whether the numbers work for your business. Take them the figures rather than the concept, and you will get a much more useful answer.

If salary sacrifice is not the right fit, that is a perfectly good outcome. There are other questions I get asked regularly, and a decision to wait or do something simpler is often the right one.