Company Car Tax Breakdown
Receiving a company car provided by your employer in the UK is treated by HMRC as a taxable Benefit-in-Kind (BiK). Rather than paying tax on the vehicle’s cash cost, your annual company car tax is calculated as a percentage of the car’s official P11D list price, determined by its official CO2 emissions (g/km) and fuel type.
To incentivize green transport, HMRC imposes significantly lower BiK tax percentage bands on zero-emission Pure Electric Vehicles (EVs) compared to high-emission petrol or diesel models.
⚙️ Rules & Thresholds
- BiK Tax Payable Calculation Formula:
Taxable Benefit Value (£) = Car P11D List Price × BiK Tax Percentage Band (%).Annual BiK Tax Payable (£) = Taxable Benefit Value × Personal Marginal Tax Rate (20%, 40%, or 45%).Monthly BiK Tax Payable (£) = Annual BiK Tax Payable / 12.
- 2026/27 Statutory HMRC BiK Tax Bands:
- Pure Electric EVs (0g/km CO2): 3% BiK Rate in 2026/27 (rising by 1% per year to 4% in 2027/28 and 5% in 2028/29).
- Plug-in Hybrids (PHEVs, 1–50g/km CO2): 8% to 14% BiK Rate, depending on electric zero-emission battery range.
- Petrol & RDE2 Diesel (51g/km+ CO2): Starts at 15% BiK for 51–54g/km, increasing by 1% for every additional 5g/km up to a maximum 37% BiK cap.
- Non-RDE2 Diesel Surcharge: +4% penalty surcharge added to the standard CO2 percentage (subject to 37% max cap).
📊 Practical Examples
- P11D List Price: £35,000
- Tax Bracket: 40% Higher Rate Taxpayer
- **Electric EV Option (0g/km)**: 3% BiK Band -> Benefit Value: £1,050.00 -> **Annual Tax: £420.00 (£35.00 / month)**
- **Petrol Car Option (135g/km)**: 28% BiK Band -> Benefit Value: £9,800.00 -> **Annual Tax: £3,920.00 (£326.67 / month)**
Tax Savings: Choosing the EV saves **£3,500.00 per year** (£291.67 per month) in personal income tax!
📑 Common Pitfalls
- Confusing Invoice Price with P11D Value: The P11D list price includes the car’s official UK list price plus delivery fees and factory-fitted optional extras, BEFORE any dealer discounts or trade-in price reductions.
- Overlooking Free Fuel Benefit Tax: If your employer pays for your personal private petrol/diesel fuel, HMRC charges an additional heavy Fuel Benefit-in-Kind tax (£27,800 fixed multiplier × BiK %).
- Ignoring Salary Sacrifice Alternatives: Participating in an employer EV salary sacrifice scheme can reduce both Income Tax and National Insurance contributions, offering even greater savings than standard company car leasing.
❓ Frequently Asked Questions (FAQ)
The P11D value is the official list price of the car specified by the manufacturer, including delivery charges, VAT, and any factory-fitted options. It excludes first-year road tax (VED) and registration fees.
The Benefit-in-Kind (BiK) tax rate for pure zero-emission electric cars is 3% for the 2026/27 tax year. It is scheduled to increase to 4% in 2027/28 and 5% in 2028/29.
HMRC collects company car tax through your monthly PAYE payroll. Your employer reports the vehicle details on a P11D or P46(Car) form, and HMRC adjusts your tax code (e.g. lowering your personal allowance code), collecting the tax automatically from your pay check.
Yes. However, company vans attract a flat-rate Benefit-in-Kind charge (£3,960 for 2026/27) rather than a CO2 percentage. Electric zero-emission vans attract a £0 BiK charge if used for commuting and business.