The tax you pay on the use of a company car depends largely on its CO2 emissions, so choosing a lower emission or electric vehicle can make a significant difference to your overall tax cost.

The benefits in kind (BIK) tax on company cars can be quite significant, with taxable rates ranging from 3% to 37% of the car’s list price when new. The rate depends on various factors, primarily the car’s CO2 emissions and fuel type. For instance, a petrol fuelled car emitting 155 g/km of CO2 or more would be taxed at the highest rate of 37% of its original list price. In contrast, an electric car with a range of 130 miles or more could benefit from the lowest rate of just 3%, significantly reducing the taxable benefit.

This creates a strong incentive for those driving company cars to switch to electric vehicles, as they would experience a noticeable reduction in their tax liability. This shift not only benefits the employees but also employers, who will see a decrease in Class 1A National Insurance contributions. These contributions are based on the total value of benefits provided in a tax year, so switching to electric vehicles helps lower overall costs for the employer.

Diesel cars attract an additional 4% supplement if they do not meet the Real Driving Emissions 2 (RDE2) standard. However, the supplement is removed entirely for diesel vehicles that are RDE2 compliant. The maximum BIK rate, including any diesel supplement, remains capped at 37%.

The taxable benefit is typically calculated based on the car’s manufacturer’s list price, which includes VAT, delivery charges, and number plates. The price considered is the list price on the day before the car is first registered. Any additional accessories fitted to the car also increase the taxable value. There are some exceptions. Employees can also reduce the list price by up to £5,000 if they make a capital contribution towards the cost of the vehicle. Special rules apply to classic cars, which have their own method for calculating the list price.

Source:HM Revenue & Customs | 27-10-2025
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Aitch
I'm Aitch, the Founder and CEO of CIGMA Accounting Ltd. As a Chartered Management Accountant and as a CIMA member, I've spent more than 16 years helping businesses, entrepreneurs, landlords, and individuals with tax planning, accounting, and HMRC compliance. As a chartered accountant in London, I'm passionate about making complex tax matters easier to understand and helping clients make confident financial decisions. Over the years, I've advised start-ups, SMEs, established companies, and high-net-worth individuals across a wide range of tax and accounting matters. My expertise includes Corporation Tax, Self-Assessment, Capital Gains Tax, Inheritance Tax planning, R&D tax relief, capital allowances, international tax, and resolving complex HMRC compliance issues. Whether clients need a business accountant, tax accountant, or strategic tax advisor, my focus is always on delivering practical advice that creates long-term value. One of my specialist areas is Making Tax Digital (MTD). I've worked extensively with businesses preparing HMRC's digital reporting requirements, helping them move to cloud accounting, improve financial processes, and adopt technology that makes compliance more efficient. I regularly speak at Making Tax Digital roadshows, industry events, and educational sessions in collaboration with Zoho Books, sharing practical insights into digital accounting, tax legislation, and the future of the profession. Many business owners looking for the best accounting firm in London are not simply searching for an accountant they're looking for trusted advice, responsive support, and long-term value. That's the approach I've taken in building CIGMA Accounting. My team and I work closely with businesses across London and the UK, providing accounting services, tax advisory, bookkeeping, payroll, VAT, company accounts, and strategic tax planning tailored to each client's goals. Through this website, I share practical guidance on UK taxation, Making Tax Digital, HMRC updates, Corporation Tax, Self-Assessment, and business finance. My aim is to provide reliable, straightforward information that helps business owners understand changing regulations, reduce compliance risks, and make informed financial decisions with confidence.
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