Company Car vs Car Allowance UK 2026/27: Which Is Better for Your Take-Home Pay?

Company Car vs Car Allowance in 2026/27: A Complete Comparison

One of the most common choices facing UK employees is whether to take a company car or a cash car allowance. Both have tax implications, and the right answer depends on the type of vehicle you would choose, your income tax rate, and how many business miles you drive.

This guide explains how both options are taxed in 2026/27 and provides worked examples to help you make an informed decision.

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How Company Car Tax (Benefit in Kind) Works

When your employer provides you with a company car that you can also use privately, HMRC treats the private use as a taxable benefit -- a Benefit in Kind (BIK). You pay income tax on the BIK value, and your employer pays Class 1A National Insurance on it.

The BIK Calculation Formula

BIK value = List price x CO2 percentage

Your tax bill on the car = BIK value x your marginal tax rate

The list price is the manufacturer's published price for the car (including options fitted when the car was first registered), regardless of any discounts.

The CO2 percentage is set by HMRC and depends on the car's CO2 emissions and fuel type:

These rates are subject to annual revision. Always check the latest HMRC tables before making a decision.

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How a Car Allowance Is Taxed

A car allowance is simply extra money added to your salary. It is taxed as earned income:

• Income tax at your marginal rate (20%, 40%, or 45%)
• Employee NI at 8% (on earnings up to £50,270) or 2% (above)
• Employer NI at 15%

Example -- basic rate taxpayer receiving £5,000 car allowance:

• Tax at 20%: £1,000
• NI at 8%: £400
• Net car allowance received: £3,600

From that £3,600, you must fund all your own car costs: purchase or lease, insurance, fuel, servicing, road tax. Whether that is enough depends entirely on the car you choose.

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Worked Comparison: EV vs Petrol Car

Scenario 1: Zero-Emission Electric Vehicle

Assume:

• Car list price: £45,000
• CO2: 0g/km (BIK rate: 3%)
• Employee earns £60,000 (higher rate taxpayer at 40%)
• Alternative car allowance available: £6,000 per year

Company car option:

• BIK value: £45,000 x 3% = £1,350
• Tax on BIK: £1,350 x 40% = £540 per year

Car allowance option:

• Allowance: £6,000
• Tax (40%): £2,400
• NI (2% above UEL): £120
• Net: £3,480 received -- but you must fund all car costs from this

For a £45,000 EV, the company car route is clearly superior. The employee pays only £540 per year in tax while the employer provides a £45,000 car. The car allowance of £3,480 net would not even cover a modest lease.

Scenario 2: High-Emission Petrol Company Car

Assume:

• Car list price: £35,000
• CO2: 160g/km (BIK rate: 35%)
• Employee earns £60,000 (higher rate taxpayer at 40%)
• Alternative car allowance: £6,000 per year

Company car option:

• BIK value: £35,000 x 35% = £12,250
• Tax on BIK: £12,250 x 40% = £4,900 per year

Car allowance option:

• Net after 40% tax + 2% NI: approximately £3,480
• Plus: you can claim 45p/mile for business travel to offset running costs

In this case, the car allowance is worth considering. The company car costs you £4,900 in extra tax per year, while a car allowance of £3,480 net may allow you to fund your own car cheaply (e.g., through a personal lease or buying outright) and keep more control.

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The Fuel Benefit Charge

Many employers offer a fuel card alongside a company car. If you use the fuel card for private mileage (including commuting), HMRC charges an additional fuel benefit.

The fuel benefit charge for 2026/27 is: £27,800 x your car's CO2 percentage

For a car with a 35% BIK rate:

• Fuel benefit value: £27,800 x 35% = £9,730
• Tax at 40%: £3,892 per year

That represents an enormous tax cost. Unless you are driving very high private mileage (typically over 15,000 miles per year), accepting the fuel benefit is rarely worthwhile. Most employees are better off paying for their own private fuel and keeping accurate records of business vs private mileage.

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Classic Cases Where Each Option Wins

Company Car Is Usually Better When:

• The car is a zero-emission EV (BIK rates are very low at 3%)
• The car has a high list price (the employer is absorbing a large cost)
• You are a basic rate taxpayer (lower tax on the BIK)
• Your employer offers no alternative allowance (the choice is car or nothing)

Car Allowance Is Usually Better When:

• The car has high CO2 emissions (BIK percentage is high)
• You are a higher-rate taxpayer and the BIK would generate a large tax charge
• You already own a reliable car or can find a cheap private lease
• You drive high business mileage and can claim the 45p/25p mileage rate tax-free
• You want flexibility -- to choose your own car, change it frequently, or keep it if you change jobs

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Employer's Perspective: Class 1A NI

Your employer also pays Class 1A National Insurance at 15% on the BIK value of your company car. This is an employer cost, not yours -- but it does influence whether employers offer cars at all versus allowances.

For the £45,000 EV with a £1,350 BIK value:

• Employer's Class 1A NI: £1,350 x 15% = £202.50 per year

For the petrol car with a £12,250 BIK:

• Employer's Class 1A NI: £12,250 x 15% = £1,837.50 per year

The EV is dramatically cheaper for the employer too -- one reason why many companies are now actively pushing EV company cars through their salary sacrifice and company car schemes.

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Company Car via Salary Sacrifice

Some employers allow employees to access electric vehicles through a salary sacrifice electric car scheme. This is different from a traditional company car in that:

• You sacrifice gross salary to "pay" for the car
• The car appears as a company car (attracting BIK tax)
• But the sacrifice saves income tax and NI on the sacrificed amount

For an EV with a 3% BIK rate, this can produce very significant savings and is increasingly popular. The NIC savings alone on the sacrifice can exceed the BIK tax charge.

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Checking Your Company Car Tax Code

If you receive a company car, HMRC adjusts your PAYE tax code to collect the BIK tax. You will see the BIK value added to your code rather than collected at year end.

Check your tax code via your Personal Tax Account at gov.uk/personal-tax-account. If the list price or CO2 figure appears incorrect, contact HMRC to have it corrected -- you could be overpaying tax.

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Summary

The right choice between company car and car allowance in 2026/27 depends heavily on your vehicle's emissions, the list price, and your marginal tax rate.

• EVs: company car route almost always wins due to the 3% BIK rate
• High-emission petrol/diesel cars: allowance often wins at higher-rate taxpayer level
• Fuel card: rarely worth it unless private mileage is very high

Use our income tax calculator to model the real take-home impact of each option for your specific situation.