What does your company car really cost?
Benefit-in-Kind tax means your employer pays you a perk — and HMRC charges both of you. Enter the list price and CO2 to see the true annual cost in Income Tax and employer NI.
Monthly cost to you: £169 · Total combined annual cost: £3,553
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How it works
What is Benefit-in-Kind?
When your employer provides a company car for private use, HMRC treats it as employment income. The taxable value is the car's list price multiplied by an "appropriate percentage" based on CO2 emissions.
Electric cars — 3% in 2025/26
Pure electric vehicles have an appropriate percentage of just 3%, rising 1% per year to a maximum of 5% by 2027/28. This makes an EV company car extremely tax-efficient versus a petrol equivalent at 25–37%.
Diesel surcharge
Diesel cars that do not meet the Real Driving Emissions 2 (RDE2) standard face a 4% surcharge on top of the CO2-based percentage, capped at 37% overall.
Employer Class 1A NI
Your employer pays Class 1A National Insurance at 15% on the BiK value — a real cost to the business that can influence how employers structure packages.
Capital contribution
If you contribute up to £5,000 toward the car's purchase price, the list price for BiK purposes is reduced by that amount, saving tax for both you and your employer.