Handytool
Car taxesFreeRuns locally

UK Company Car Tax Calculator

Estimate 2026-27 Benefit-in-Kind tax from P11D value, CO2 emissions, electric range and income tax rate.

UK company car tax calculator

Estimate Benefit-in-Kind using 2026-27 company car percentages.

List price including VAT, delivery, factory options and accessories.

Use your marginal income tax rate, for example 20, 40 or 45.

Vehicle details

Use the WLTP figure unless the official rule for your vehicle says otherwise.

For UK BIK plug-in hybrids, use the zero-emission range.

Annual tax
£1,800
Monthly tax
£150.00
BIK percentage
10%
Taxable benefit
£4,500

Tax breakdown

Taxable value£45,000
Taxable benefit£4,500
Annual tax£1,800
Monthly tax£150.00

Formula details

BIK formula£45,000 x 10%
Income tax formula£4,500 x 40%
Diesel formula0 percentage points

Official source links

GOV.UK company car percentagesHMRC company car policy

UK company car tax calculator is an unofficial planning estimate, not legal, tax or customs advice. The calculation runs locally in your browser and does not upload your numbers.

About the UK Company Car Tax Calculator

Use this UK company car tax calculator to estimate the annual and monthly Benefit-in-Kind cost of a company car for 2026-27. Enter the P11D value, CO2 figure, electric range and your marginal income tax rate to see the BIK percentage, taxable benefit and employee tax. Everything runs in your browser and nothing is stored.

UK Company Car Tax Calculator features

  • 01

    2026-27 BIK percentages

    The calculator covers zero-emission cars, plug-in hybrids by electric range and higher CO2 bands up to the 37% cap.

  • 02

    Annual and monthly cost

    See the taxable benefit, annual employee tax and monthly equivalent in one breakdown.

  • 03

    Diesel supplement option

    Apply the diesel supplement where it is relevant, while respecting the 37% cap.

UK Company Car Tax Calculator FAQ

How is UK company car tax calculated?
P11D value is multiplied by the appropriate BIK percentage. The taxable benefit is then multiplied by your marginal income tax rate.
What is the BIK rate for an electric company car in 2026-27?
For zero-emission company cars the appropriate percentage is 4% in 2026-27.
How do plug-in hybrid BIK rates work?
For cars emitting 1-50 g/km CO2, the percentage depends on the official zero-emission electric range.
Does the company car tax calculator include employer National Insurance?
No. It estimates the employee income tax cost, not the employer Class 1A NIC charge.
Is my P11D value saved?
No. The calculation is local to your browser and does not upload the vehicle value or tax rate.

Related tools

Car taxes →

Explore other tools

All tools →