Company Car Tax Calculator

Work out the Benefit-in-Kind (BiK) tax on a company car for the 2026/27 tax year, using the official HMRC rates.

P11D value

The car's list price including VAT, delivery and factory options, excluding the first year's road tax and the registration fee.

Fuel type

CO2 (g/km)

Electric-only range (miles)

The official zero-emission range. This sets the BiK band for cars emitting 1 to 50 g/km.

This diesel does not meet the RDE2 standard (adds a 4% surcharge). Most diesels registered from September 2018 do meet it, so leave this unticked if unsure and it's a newer car.

Your income tax rate

How company car tax works

Benefit-in-Kind tax on a company car is worked out as P11D value multiplied by the BiK rate, multiplied by your income tax rate. The BiK rate is set by HMRC from the car's CO2 emissions and fuel type, and for plug-in hybrids, its electric-only range. Electric cars carry the lowest rate, just 4% in 2026/27, while higher-emitting petrol and diesel cars reach the 37% cap.

2026/27 BiK rates

Electric (0 g/km) is 4%. Plug-in hybrids emitting 1 to 50 g/km range from 4% to 16% depending on electric range. Petrol and diesel cars from 51 g/km start at 17% and rise to a 37% maximum, and a non-RDE2 diesel adds a 4% surcharge on top (still capped at 37%). You can check a car's emissions with our free ULEZ and emissions checker, or work out its wider running costs.

This calculator is a general guide for the 2026/27 tax year using HMRC's published appropriate-percentage rates, and is not tax advice. Your actual tax depends on the car's exact P11D value and official CO2 and electric-range figures, your marginal tax rate and your circumstances, and rates are set by government and change in future Budgets. For a definitive figure, use HMRC's own company car tax calculator or speak to a qualified accountant. MotifyMe is not a tax adviser.