Company Car Tax Rates Calculator

Calculate your company car tax liability based on vehicle details and personal circumstances

Complete Guide to Company Car Tax Rates in 2024

Company cars remain a popular employee benefit in the UK, but understanding the tax implications is crucial for both employers and employees. This comprehensive guide explains how company car tax (also known as Benefit-in-Kind or BIK tax) is calculated, the current rates for 2024/25, and strategies to minimise your tax liability.

How Company Car Tax Works

When you receive a company car for private use, HMRC considers this a taxable benefit. The amount you’re taxed depends on:

• The car’s P11D value (its list price including VAT and delivery charges, minus the first year registration fee and vehicle tax)
• The car’s CO₂ emissions (or electric range for plug-in vehicles)
• Your income tax bracket (20%, 40% or 45%)
• Whether you contribute towards the cost of the car
• The type of fuel the car uses

The tax is calculated as a percentage of the car’s P11D value (the BIK rate), which is then multiplied by your income tax rate. This amount is added to your taxable income, increasing your overall tax bill.

Company Car Tax Rates for 2024/25

The BIK rates are determined by the car’s CO₂ emissions and fuel type. For the 2024/25 tax year, the rates are as follows:

CO₂ Emissions (g/km)	Petrol Cars	Diesel Cars	Electric Range (miles)	Hybrid/Electric Cars
0	–	–	130+	2%
1-50	2%	2%	70-129	5%
51-54	5%	5%	40-69	8%
55-59	8%	8%	30-39	12%
60-69	12%	15%	Less than 30	14%
70-74	15%	18%	–	–
75+	1% per 5g/km (max 37%)	1% per 5g/km (max 37%) + 4%	–	–

Note: Diesel cars that meet the RDE2 standard (most new diesels) are not subject to the 4% supplement.

Key Changes in 2024/25

The 2024/25 tax year brings several important changes to company car taxation:

1. Electric vehicle rates increase: The 2% rate for pure electric cars (0g CO₂) remains, but the rates for cars with 1-50g CO₂ emissions have increased by 1%.
2. Hybrid vehicle adjustments: The electric range thresholds for hybrid vehicles have been adjusted, with cars needing longer electric ranges to qualify for lower rates.
3. Diesel supplement: The 4% diesel supplement continues to apply to non-RDE2 compliant diesel cars.
4. WLF exemption: The £0 benefit for cars with CO₂ emissions of 1-50g/km and electric range over 130 miles has been removed.

How to Calculate Your Company Car Tax

Our calculator above performs these calculations automatically, but here’s the manual process:

1. Determine the BIK rate: Find your car’s CO₂ emissions and fuel type in the rate table above.
2. Calculate the BIK value: Multiply the P11D value by the BIK rate.
   Example: £30,000 P11D × 20% BIK rate = £6,000 annual BIK value
3. Apply your tax rate: Multiply the BIK value by your income tax rate.
   Example: £6,000 × 40% = £2,400 annual tax liability
4. Adjust for capital contributions: If you paid towards the car (up to £5,000), subtract this from the P11D value before calculating.
5. Consider fuel benefit: If your employer provides free fuel for private use, there’s an additional tax charge.

Strategies to Reduce Company Car Tax

There are several legitimate ways to minimise your company car tax liability:

• Choose a low-emission vehicle: Electric and plug-in hybrid vehicles attract the lowest BIK rates. A pure electric car with 0g CO₂ emissions has just a 2% BIK rate in 2024/25.
• Opt for a cheaper model: The tax is based on the P11D value, so choosing a more affordable model reduces your liability.
• Make a capital contribution: Paying up to £5,000 towards the car reduces the P11D value used for calculations.
• Consider salary sacrifice: Some employers offer salary sacrifice schemes where you give up part of your salary in exchange for the car, potentially reducing your overall tax burden.
• Avoid free fuel: The fuel benefit charge can add significantly to your tax bill. Paying for private fuel yourself avoids this charge.
• Check registration date: Cars registered before April 2020 often have lower BIK rates than equivalent newer models.
• Business mileage: While private mileage is taxed, business mileage isn’t. Keep accurate records to ensure you’re not paying tax on business journeys.

Electric and Hybrid Company Cars

The tax treatment of electric and hybrid vehicles has become increasingly favourable in recent years as the government encourages the adoption of cleaner vehicles. Here’s what you need to know:

Vehicle Type	2024/25 BIK Rate	2025/26 BIK Rate	Electric Range Requirement	Notes
Pure Electric (0g CO₂)	2%	2%	N/A	No emissions = lowest rate
Plug-in Hybrid	2-14%	5-17%	130+ miles	Rate depends on electric range
Plug-in Hybrid	5-14%	8-17%	70-129 miles	Rate depends on electric range
Plug-in Hybrid	8-14%	11-17%	40-69 miles	Rate depends on electric range
Plug-in Hybrid	12-14%	14-17%	30-39 miles	Rate depends on electric range
Plug-in Hybrid	14%	17%	<30 miles	Same as petrol/diesel rates
Hybrid (non-plug-in)	14-37%	17-37%	N/A	Rates based on CO₂ emissions

For electric vehicles, the government has committed to keeping the BIK rate at 2% until April 2025, making them extremely tax-efficient. After that, rates are expected to increase gradually to 5% by 2028.

Employer Considerations

Employers also have responsibilities and costs associated with company cars:

• Class 1A National Insurance: Employers must pay 13.8% on the value of the benefit (the BIK value).
• Reporting requirements: Company cars must be reported on form P11D and included in payroll processing.
• Fuel benefit: If free fuel is provided for private use, this is an additional taxable benefit.
• Capital allowances: Employers can claim capital allowances on company cars, with 100% first-year allowance for electric vehicles.
• VAT recovery: Businesses can typically recover 50% of the VAT on company cars (100% for commercial vehicles).

Employers should also consider the administrative burden of managing company cars, including:

• Maintaining accurate records of private vs business mileage
• Processing P11D forms annually
• Managing fuel benefit charges
• Handling employee contributions
• Dealing with leasing vs purchasing decisions

Alternative Options to Company Cars

For some employees, alternatives to traditional company cars may be more tax-efficient:

1. Cash allowance: Instead of a company car, some employers offer a cash allowance. This is taxed as normal income but gives the employee flexibility to choose their own vehicle.
2. Car allowance: Similar to cash allowance but specifically for vehicle-related expenses. The first £8,500 per year is tax-free for business mileage.
3. Salary sacrifice: As mentioned earlier, sacrificing salary for a car can be tax-efficient, especially for electric vehicles.
4. Pool cars: Vehicles kept at the workplace and used by multiple employees for business purposes only aren’t subject to BIK tax.
5. Company van: If you don’t need a car, a company van might be more tax-efficient, with a flat £3,600 benefit for 2024/25.

Each option has different tax implications, so it’s important to calculate which would be most beneficial for your specific circumstances.

Future Trends in Company Car Taxation

The UK government has signalled several changes to company car taxation in coming years:

• Electric vehicle rates: The 2% rate for pure electric cars will increase to 3% in 2025/26, then 4% in 2026/27 and 5% in 2027/28.
• Hybrid vehicles: Rates for plug-in hybrids will gradually increase, particularly for those with shorter electric ranges.
• Diesel supplement: The 4% supplement for non-RDE2 diesels may be phased out as newer diesel models meet stricter emissions standards.
• Real-world emissions: There’s discussion about basing BIK rates on real-world emissions data rather than laboratory tests.
• Benefit simplification: The government may simplify the complex system of BIK rates to make it more understandable.

These changes reflect the government’s push towards lower-emission vehicles and its commitment to reaching net-zero carbon emissions by 2050.

Common Mistakes to Avoid

When dealing with company car tax, there are several common pitfalls to be aware of:

1. Incorrect P11D value: Using the wrong value (e.g., including optional extras that should be excluded or vice versa).
2. Wrong CO₂ figure: Using the manufacturer’s claimed figure rather than the official VCA figure.
3. Missing deadlines: Failing to submit P11D forms by the 6 July deadline can result in penalties.
4. Private fuel confusion: Not properly accounting for private fuel benefits when they apply.
5. Ignoring capital contributions: Forgetting to deduct employee contributions from the P11D value.
6. Incorrect tax year: Using the wrong tax year’s rates when calculating liability.
7. Poor record keeping: Not maintaining adequate records of business vs private mileage.
8. Assuming electric is always best: While electric cars have low BIK rates, their higher P11D values can sometimes result in higher tax than a cheaper petrol hybrid.

Frequently Asked Questions

Q: Do I pay company car tax if I only use the car for business?
A: No, if you can prove the car is used exclusively for business (with no private use, including commuting), there’s no BIK charge. However, HMRC scrutinises such claims closely.

Q: How is the P11D value determined?
A: It’s the list price including VAT, delivery charges, and optional accessories (up to £100), minus the first year registration fee and vehicle tax.

Q: Can I avoid company car tax by buying the car through my limited company?
A: No, if the car is available for private use, it’s still a taxable benefit. The rules are similar whether the company owns or leases the car.

Q: What counts as ‘private use’?
A: Private use includes commuting to and from work, personal errands, and any non-business journeys. Even occasional private use makes the car taxable.

Q: How does the fuel benefit charge work?
A: If your employer provides fuel for private mileage, there’s an additional tax charge based on a fixed figure (£27,800 for 2024/25) multiplied by your BIK rate and your tax band.

Q: Are there any exemptions from company car tax?
A: Very few. The main exemption is for pool cars that meet strict conditions (kept at workplace, not normally used by one person, private use is merely incidental to business use).

Q: How do I report company car benefits?
A: Your employer should include the value on your P11D form and adjust your tax code. You don’t need to report it separately on your self-assessment unless you’re a higher-rate taxpayer with underpaid tax.

Q: Can I claim tax relief on business mileage in a company car?
A: No, because you’re already getting the benefit of the car. However, if you use your own car for business, you can claim mileage allowance.

Official Resources and Further Reading

For the most accurate and up-to-date information on company car tax, consult these official sources:

• GOV.UK: Calculate tax on company cars – Official calculator and guidance from HMRC
• GOV.UK: Benefits in Kind rates and allowances – Official BIK rate tables
• GOV.UK: Company cars – rules for employers – Employer obligations and reporting requirements
• ICAEW: Company car tax guidance – Detailed technical guidance from the Institute of Chartered Accountants

For personalised advice, consider consulting a qualified tax advisor who can help you navigate the complexities of company car taxation based on your specific circumstances.