Cars for Employees

The current regime for taxing employer provided cars (commonly referred to as company cars) is intended:

  • to encourage manufacturers to produce cars which are more environmentally friendly and
  • to give employee drivers and their employers a tax incentive to choose more fuel-efficient and environmentally friendly vehicles.

We set out below the main areas of importance. Please do not hesitate to contact us if you require further information.

The rules

Cars provided before 5th April 17 used to be  taxed by reference to the list price of the car but graduated according to the level of its carbon dioxide (CO2) emissions.

From April 17, where an employee has an option of a cash allowance or a car, the benefit in kind value will be determined as the higher of the cash value or the benefit in kind value.

This is also the case where the employee has a salary sacrifice in place. From April 17, the value to be taxed will be the higher of the benefit in kind charge or the cash forgone (salary sacrificed).

The impact of this is that the option of choosing a low value car or low emission car to reduce the taxable benefit in kind may longer work as the cash allowance may be higher and so provide the basis of the benefit calculation.

The current percentages for company cars are set out below.

Percentage charges

CO 2 emissions ( g /km) * 2017/18% of car’s price taxed 2018/19% of car’s price taxed
0 – 50 9 13
51 – 75 13 16
76 – 94 17 19
95 18 20
100 19 21
105 20 22
110 21 23
115 22 24
For every additional 5g thereafter add 1%
Until the maximum percentage is reached 37 37

* Emissions are rounded down to nearest 5g/km for values above 95g/km


Jane was provided with a new company car, a Mercedes CLK 430, on 6 April 2016. The list price is £50,000. The CO2 emissions are 240 g/km.

There is no change in car as at 5th April 17 so the “old rules” apply.

For 2017/18 and 2018/19 Jane’s benefit will be £50,000 x 37% =£18,500.

Phil has a company car, a BMW 318i, which had a list price of £21,000 when it was provided new on 6 April 2017. The CO2 emissions are 117 grams per kilometre. Note: The CO2 emissions are rounded down to the nearest 5 grams per kilometre – in this case 115.

Phil’s benefit for 2017/18 is: £21,000 x 22%  = £4,620. Phil’s benefit will increase for 2018/19 to £5,040 being £21,000 x 24%.

John was supplied with a new car after  the 5th April 17 with an emission level of 120g/km. The car value is £15,000 and so a rate of 23% would be applied giving the benefit value at £3,450.

If John has the option of taking a cash alternative of £4,000 then this is the basis for the benefit in kind benefit as this is higher than £3,450.


Diesel cars emit less CO2 than petrol cars and so would be taxed on a lower percentage of the list price than an equivalent petrol car. However, diesel cars emit greater quantities of air pollutants than petrol cars and therefore a supplement of 3% of the list price generally applies to diesel cars.

The government announced in the Autumn Budget 2017 that they will legislate to increase the diesel supplement from 3% to 4%. This will apply to all diesel cars registered from 1 January 1998 that do not meet the Real Driving Emissions Step 2 (RDE2) standards. There is no change to the current position that the diesel supplement does not apply to hybrid cars. The change will have effect from 6 April 2018.


A diesel car that would give rise to a 22% charge on the basis of its CO2 emissions will instead be charged at 25% for 2017/18. For 2018/19 a 22% diesel car would be charged at  26% The maximum charge for diesel is capped at 37%.

Obtaining emissions data

The Vehicle Certification Agency produces a free guide to the fuel consumption and emissions figures of all new cars. It is available on the internet at These figures are not however necessarily the definitive figures for a particular car. The definitive CO2 emissions figure for a particular vehicle is recorded on the Vehicle Registration Document (V5).

The list price

  • The list price of a car is the price when it was first registered including delivery, VAT and any accessories provided with the car. Accessories subsequently made available are also included (unless they have a list price of less than £100).
  • Employee capital contributions up to £5,000 reduce the list price.

Employer’s Class 1A national insurance contributions

The benefit chargeable to tax on the employee is also used to compute the employer’s liability to Class 1A (the rate is currently 13.8%).

Imported cars

Some cars registered after 1 January 1998 may have no approved CO2 emissions figure, perhaps if they were imported from outside the EC. They are taxed according to engine size.

Engine size (cc) % of list price charged to tax

2017/1 8

% of list price charged to tax


0 – 1400 16% 23%
1401 – 2000 27% 34%
Over 2000 37% 37%

Private fuel

There is a further tax charge where a company car user is supplied with or allowed to claim reimbursement for fuel for private journeys.

The fuel scale charge is based on the same percentage used to calculate the car benefit. This is applied to a set figure which is £23,400 for 2018/19 (£22,600 for 2017/18). As with the car benefit, the fuel benefit chargeable to tax on the employee is used to compute the employer’s liability to Class 1A. The combined effect of the charges makes the provision of free fuel a tax inefficient means of remuneration unless there is high private mileage.

The benefit is proportionately reduced if private fuel is not provided for part of the year. So taking action now to stop providing free fuel will have an immediate impact on the fuel benefit chargeable to tax and NIC.

Please note that if free fuel is provided later in the same tax year there will be a full year’s charge.

Business fuel

No charge applies where the employee is solely reimbursed for fuel for business travel.

HMRC issue advisory fuel only mileage rates for employer provided cars. Employers can adopt the rates in the following table but may pay lower rates if they choose.

Rates from 1 December 2017

Engine size Petrol
1400cc or less 11p
1401cc – 2000cc 14p
Over 2000cc 21p
Engine size LPG
1400cc or less 7p
1401cc – 2000cc 9p
Over 2000cc 14p
Engine size Diesel
1600cc or less 9p
1601cc – 2000cc 11p
Over 2000cc 13p

HMRC update these rates on a quarterly basis in March, June, September and December. The latest rates can be found at

Employees’ use of own car

There is also a statutory system of tax and NIC free mileage rates for business journeys in employees’ own vehicles.

The statutory rates are:

Rate per mile
Up to 10,000 miles 45p
Over 10,000 miles 25p

Employers can pay up to the statutory amount without generating a tax or NIC charge. Payments made by employers are referred to as ‘mileage allowance payments’. Where employers pay less than the statutory rate (or make no payment at all) employees can claim tax relief on the difference between any payment received and the statutory rate.

How we can help

We can provide advice on such matters as:

  • whether a car should be provided to an employee or a private car used for business mileage
  • whether employee contributions are tax efficient
  • whether private fuel should be supplied with the car.

Please contact us for more detailed advice.