Company Cars Explained
Tax, benefits and what a £50,000 car could really cost
If you’re thinking about buying a company car for yourself or your employees, it’s worth understanding the tax implications before making a decision. Two company cars can have exactly the same list price but produce dramatically different tax bills. The difference usually comes down to the car’s Benefit in Kind (BIK) percentage, which is driven largely by its CO₂ emissions.
In this guide, we explain the tax implications and potential benefits of providing a company car, consider the treatment of business and private fuel, and compare two cars with the same £50,000 list price.
What is a company car?
A company car is a vehicle that a business provides for an employee or director to use for both business and private journeys, including commuting.
Because there’s a personal benefit to using the vehicle, HMRC treats it as a Benefit in Kind (BIK). This means the employee pays tax on the benefit, while the employer is also liable to pay Class 1A National Insurance contributions based on its value.
Although this might sound complicated, the tax isn’t based on how much the business pays each month. Instead, HMRC uses a standard calculation based on the vehicle itself.
How company car tax works using a £50,000 example?
The taxable benefit is calculated as follows:
Car list price × BIK percentage = taxable benefit
The employee or director then pays Income Tax on the taxable benefit at their marginal rate. The company normally pays Class 1A National Insurance at 15% on the same amount.
For the 2026/27 tax year, a fully electric car has a 4% BIK rate, while a high-emission car can fall into the maximum 37% band. The following example compares two cars with the same £50,000 list price.
| Annual cost 2026/27 | Electric car | High-emission car |
|---|---|---|
| Car list price | £50,000 | £50,000 |
| BIK rate | 4% | 37% |
| Taxable benefit | £2,000 | £18,500 |
| Employee tax at 20% | £400 | £3,700 |
| Employee tax at 40% | £800 | £7,400 |
| Employee tax at 45% | £900 | £8,325 |
| Company Class 1A NIC at 15% | £300 | £2,775 |
Illustrative annual figures for a £50,000 list-price car. Income Tax examples use the 20%, 40% and 45% rates applying in England, Wales and Northern Ireland. Scottish rates differ.
What the employee pays
The electric car produces a taxable benefit of £2,000. The employee’s annual Income Tax is therefore £400 at 20%, £800 at 40% or £900 at 45%.
The high-emission car produces a taxable benefit of £18,500. The equivalent annual tax amounts are £3,700, £7,400 and £8,325.
These are simplified examples. The actual amount can be affected by the employee’s total income, allowances, tax code, contributions towards the car and any periods when the car is unavailable.
What the company pays
The company pays Class 1A National Insurance at 15% on the taxable benefit. This produces an annual company cost of £300 for the electric car and £2,775 for the high-emission car.
The company should also consider the purchase or lease cost, insurance, servicing, repairs, fuel or charging, and the relevant corporation tax and VAT treatment.
What this means for a company director
For an owner-director paying Income Tax at 45%, the combined personal tax and company National Insurance is £1,200 for the electric car and £11,100 for the high-emission car. That is an annual difference of £9,900. A summary table is below.
| Annual cost 2026/27 | Electric car | High-emission car |
|---|---|---|
| Car list price | £50,000 | £50,000 |
| BIK rate | 4% | 37% |
| Taxable benefit | £2,000 | £18,500 |
| Owner-director tax at 20% | ||
| Owner-director tax at 20% | £400 | £3,700 |
| Company Class 1A NIC @ 15% | £300 | £2,775 |
| Combined BIK and NIC Total | £700 | £6,475 |
| Owner-director tax at 40% | ||
| Owner-director tax at 40% | £800 | £7,400 |
| Company Class 1A NIC @ 15% | £300 | £2,775 |
| Combined BIK and NIC Total | £1,100 | £10,175 |
| Owner-director tax at 45% | ||
| Owner-director tax at 45% | £900 | £8,325 |
| Company Class 1A NIC @ 15% | £300 | £2,775 |
| Combined BIK and NIC Total | £1,200 | £11,100 |
Illustrative annual figures for a £50,000 list-price car. Income Tax examples use the 20%, 40% and 45% rates applying in England, Wales and Northern Ireland. Scottish rates differ.
Why electric cars have lower company car tax
The 4% BIK rate for zero-emission cars in 2026/27 makes electric vehicles one of the most tax-efficient company-car choices. The low percentage reduces both the employee’s taxable benefit and the employer’s Class 1A National Insurance bill.
Plug-in hybrids may also qualify for lower BIK percentages, but their treatment depends on CO₂ emissions and electric-only range. It is important to check the appropriate percentage for the specific model rather than assuming every hybrid receives the same rate.
What if the company pays for private fuel?
Where a company pays for petrol or diesel used for private journeys, a separate fuel benefit charge can arise. HMRC does not base this charge on the amount of private fuel actually purchased. Instead, the car’s BIK percentage is applied to a fixed multiplier, which for 2026/27 is £29,200.
The resulting potential Income Tax and Class 1A NIC is shown in the following table.
| Annual fuel-benefit cost 2026/27 | Electric car | High-emission car |
|---|---|---|
| Fuel benefit multiplier | Not applicable | £29,200 |
| BIK rate | Not applicable | 37% |
| Taxable benefit | £0 | £10,804 |
| Employee tax at 20% | £0 | £2,160.80 |
| Employee tax at 40% | £0 | £4,321.60 |
| Employee tax at 45% | £0 | £4,861.80 |
| Company Class 1A NIC at 15% | £0 | £1,620.60 |
Illustrative annual figures for a car in the 37% BIK band. Income Tax examples use the 20%, 40% and 45% rates applying in England, Wales and Northern Ireland. Scottish rates differ.
Because the charge is broadly all-or-nothing, providing a relatively small amount of private fuel can still create a large tax bill. Many employees are therefore better off paying for their own private fuel and having the company reimburse only qualifying business travel.
Electric cars and the fuel-benefit: Electricity is not treated as fuel for the company-car fuel benefit charge. Separate rules and advisory electricity rates can apply when business charging costs are reimbursed.
Can a sole trader have a company car?
A sole trader and their business are legally the same person, so a sole trader cannot provide themselves with a company car in the same way as a limited company provides one to an employee or director.
A sole trader may still claim tax relief for qualifying business use of a vehicle. Depending on the circumstances and the rules applying when the vehicle is acquired, this may involve simplified mileage expenses or a business proportion of actual running costs.
Is a company car right for you?
A company car can help a business attract and retain employees while providing reliable, well-maintained vehicles. For limited-company directors, an electric car can also be a tax-efficient way to run a vehicle through the company.
However, a company car is not always the most cost-effective option. The right choice depends on the vehicle, annual mileage, private use, the employee’s tax position and the total costs carried by the business. Higher-emission cars and private fuel can produce substantial tax charges.
Employees who use their own vehicle for qualifying business journeys may instead receive approved mileage payments. Ordinary travel between home and a permanent workplace is commuting and does not normally qualify as business mileage.
Before deciding, compare:
- The employee’s or director’s annual BIK tax
- The company’s Class 1A National Insurance
- Purchase or lease costs, including any deposit
- Insurance, servicing and repairs
- Fuel or charging costs
- Available corporation tax and VAT relief
- A cash allowance or use of a personally owned car
- Expected business and private mileage
The most useful comparison is the total annual cost for both the individual and the business, rather than the monthly lease payment alone. A tailored calculation before signing a purchase or lease agreement can help prevent an expensive surprise.
How Digital Accounting can help
Digital Accounting can compare the likely personal and company tax costs, explain the treatment of purchase or lease options and help identify the most tax-efficient approach for your circumstances.
Get in touch with our team if you would like tailored advice on a company car, electric vehicle, car allowance or business mileage arrangement.
Sources and important notes
- HMRC, Company car benefit: appropriate percentages for 2026/27 — https://www.gov.uk/guidance/company-car-benefit-the-appropriate-percentage-480-appendix-2
- HMRC, National Insurance contribution rates — https://www.gov.uk/national-insurance-rates-letters/contribution-rates
- HMRC, Car fuel benefit multiplier for 2026/27 — https://www.gov.uk/government/publications/increase-to-van-benefit-charge-and-fuel-benefit-charges-for-cars-and-vans
- HMRC, Income Tax rates and allowances — https://www.gov.uk/government/publications/rates-and-allowances-income-tax/income-tax-rates-and-allowances-current-and-past
This article provides general information and illustrative calculations, not personalised tax advice. Rates and rules can change, and Scottish Income Tax rates differ from those used in the main examples.
