What is the P11D value of a company car?

The P11D value is the official list price of the vehicle, including factory options, delivery, and VAT, minus the first-year registration fee and road tax.

Who pays Class 1A National Insurance on company cars?

Employers pay Class 1A NICs at 13.8% on the taxable BiK benefit value of the company car provided to the employee.

United KingdomCompany Car Benefit-in-Kind (BiK Tax)Finance & Salary

UK Company Car Benefit-in-Kind (BiK) & Electric Vehicle Tax Calculator

Calculate annual and monthly personal income tax on company cars based on P11D list value and HMRC CO2 emissions BiK tax bands (2% for zero-emission electric vehicles up to 37% for high-emission petrol/diesel).

Auto & Vehicles Salaries & Monthly Wages Taxes & Duties

Calculator Inputs

Live Real-Time

Vehicle P11D List Value (Including VAT & Options) (£)

£/mo

Quick select:

HMRC CO2 BiK Percentage Rate (% - 2% for EV, ~25-37% for ICE)2 %

2 %37 %

Employee Income Tax Band

Calculated ResultCompany Car Benefit-in-Kind (BiK Tax)

Monthly Company Car Tax Cost Deducted via PAYE

30£/mo

Total Annual Personal BiK Tax Liability

360 £/mo

P11D Taxable Benefit Value (£/year)

900 £/mo

Detailed Calculation Breakdown

Taxable BiK Value

900 £/mo

Employer Class 1A NIC

124.2 £/mo

Monthly Net Cost

30 £/mo

Calculation Methodology

Taxable BiK Value = P11D Vehicle Value * (BiK Band% / 100). Annual BiK Tax = Taxable BiK Value * Marginal Income Tax Rate% (20%, 40%, or 45%). Monthly Tax = Annual BiK Tax / 12.

Important Legal & Educational Disclaimer

Electric vehicles (0g/km CO2) benefit from a low 2% BiK rate (rising to 3% in 2025/26 and 4% in 2026/27).

This calculator is designed for educational and informational purposes only based on public statutory frameworks. The outputs do not constitute binding financial, tax, or legal advice. We assume no liability for decisions made based on these estimations. Always verify with the relevant official authorities or a certified professional advisor.

Frequently Asked Questions

Zero-emission EVs have a Benefit-in-Kind (BiK) rate of only 2% to 3%, costing higher-rate employees under £30-£50/month in tax on a £50,000 car.

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United Kingdom

UK Company Car Benefit-in-Kind (BiK) & Electric Vehicle Tax Calculator

Calculator Inputs

Detailed Calculation Breakdown

Calculation Methodology

Important Legal & Educational Disclaimer

Frequently Asked Questions

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