Company Car Tax (BIK) Calculator
Compare estimated BIK tax for petrol, diesel, or electric cars.
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£
Company car tax (BIK) calculator guide for UK drivers
WeCovr's company car tax calculator helps UK employees estimate BIK costs, backed by FCA-authorised guidance and 900,000+ policies issued across protection products. We also support private medical insurance UK planning, while this guide explains BIK basics for comparison only.
What this BIK calculator estimates
The calculator estimates benefit-in-kind tax based on list price, CO2 emissions, fuel type, and your income tax band.
It does not include optional extras, capital contributions, or fuel benefit charges.
Applies a CO2-based BIK percentage.
Shows annual tax for petrol, diesel, or electric.
Compares EV baseline tax to other options.
Why CO2 bands drive the cost
Higher emissions generally mean a higher BIK percentage, which increases the taxable benefit.
Why WeCovr supports employee planning
WeCovr provides FCA-authorised guidance with high customer satisfaction ratings. We also offer complimentary access to the CalorieHero AI calorie tracking app and discounts when customers take PMI or Life insurance. If you are comparing private medical insurance UK cover, we can help you access private health cover through a trusted PMI broker.
Data sources and guidance references
This guide references HMRC benefit-in-kind and company car tax guidance.
Company car BIK considerations
| Fuel type | BIK trend | Tax impact | Best for |
|---|---|---|---|
| Electric (EV) | Lowest | Lowest | Cost-efficient tax |
| Petrol | Medium | Medium | Balanced choice |
| Diesel | Higher | Higher | Legacy fleets |
Related WeCovr resources
FAQs
Does this include fuel benefit charge?
No. It focuses on the car benefit only. Fuel benefit can add more tax.
Are EV BIK rates fixed?
No. EV BIK rates can change with future budgets.
Is list price the same as the purchase price?
No. BIK uses the official list price including VAT and options.
Should I check my P11D?
Yes. Your P11D shows the taxable benefit values used for PAYE adjustments.