Company car tax calculator

Are you deciding on a new company car? If you want to estimate the benefit in kind tax, you could pay for a vehicle, then use our calculator to help you make an informed choice.

May 2, 2025

A company car can be a valuable perk and choosing one can be a lot of fun. Unfortunately the potential tax implications are not so much fun, and choosing the wrong car can prove to be an expensive mistake.

Understanding how BIK tax is calculated

Benefit-in-kind is a tax you pay on any perks you receive from your company, in addition to your salary as part of your remuneration package. How much company-car tax you’ll pay depends on a number of factors; the cost of the car (P11D value), your salary and the car’s CO2 emissions. While your salary is likely to be fixed when you choose your company car, you can choose a car with a lower P11D value and low CO2 emissions in order to reduce the amount you’ll pay in BIK tax.

2 people working out their bik tax value

Working it all out

To work our the BIK value of a company car, you multiple the car’s P11D price (list price including optional extras, VAT and delivery charges, less the first-year registration fee and annual road tax) by the percentage BIK band the car sits in. The BIK bank is determined by the CO2 emissions of the vehicle. The actual figure you’ll pay is this number multiplied by your income tax band of 20% or 40%.

OUR SERVICES

At AMT Auto, we redefine convenience with vehicle solutions designed for both businesses and individuals.
No matter the vehicle or the duration, we’ve got you covered with our exceptional services.
Discover flexible car leasing, car rental, used cars to buy, or subscribe to a car or van with us—you can even sell your current car for the best price. For businesses needing consultancy on fleet management or a partner to supply vehicles to customers, we’ve got it all under one roof.

Rent

We offer short-term and long-term vehicle rental to businesses and individuals on the widest range of vehicles, from 1 day to 3 months plus. Our corporate rental offering includes third-party supply services to car dealerships, insurance and accident management companies.
View

Lease

Car leasing is a cost-effective and hassle-free way to drive a brand-new vehicle whilst benefiting from fixed monthly payments, manufacturer warranties, road tax and free delivery. We supply all makes and models of new car lease vehicles from a national network of franchised main dealers and vehicle manufacturers.
View

Buy

Redline Specialist Cars, part of the AMT Auto Group and one of the UK's leading and most respected premium used car retailers, ensures that we can offer you the widest range of quality vehicles. Visit our showroom or buy online with confidence.
View

Sell

Redline Specialist Cars, part of the AMT Auto Group and one of the UK's leading and most respected premium used car retailers, ensures that we can offer you the best price for your vehicle.
View

Subscribe

We offer short-term and long-term vehicle rental to businesses and individuals on the widest range of vehicles, from 1 day to 3 months plus. Our corporate rental offering includes third-party supply services to car dealerships, insurance and accident management companies.
View

Insure

We offer the widest range of automotive, personal, and commercial insurance, making sure you get the right cover at the right price.
View