Company Car vs Car Allowance: Which Is More Tax-Efficient?

The choice between offering a company car and simply paying a cash car allowance instead is one that comes up regularly, whether you're a director deciding how to fund your own vehicle or a business owner designing a benefits package for staff who need to drive as part of their role. The right answer depends heavily on the specific vehicle involved and how it's used, and the tax consequences of getting it wrong can be more significant than many people expect.

How Company Car Tax Actually Works

If a business provides an employee or director with a company car available for private use, the recipient pays Income Tax on the benefit, calculated as a percentage of the car's list price, with that percentage determined largely by the vehicle's CO2 emissions. Lower-emission and electric vehicles attract significantly lower percentages than higher-emission petrol and diesel equivalents, which has driven a genuine shift towards electric company cars in recent years, as the tax treatment has become considerably more favourable for businesses and employees willing to make the switch. The employer also pays Class 1A National Insurance on the same benefit value, making the overall cost to the business directly linked to the emissions profile of the vehicle chosen.

How a Cash Car Allowance Works Instead

A cash car allowance, by contrast, is simply additional salary paid to the employee to fund and run their own vehicle, taxed through payroll in exactly the same way as their normal earnings, with standard Income Tax and National Insurance applied on both sides. There's no separate benefit-in-kind calculation to worry about, and the employee has full ownership and flexibility over the vehicle they choose, but they also carry the full financial responsibility and risk of ownership, maintenance and depreciation themselves.

Why Electric Vehicles Have Changed the Calculation

For a long time, the general rule of thumb was that a cash allowance tended to work out more tax-efficient than a company car for most vehicles, given how company car tax was calculated on higher-emission models. That calculation has shifted considerably with the favourable tax treatment now applied to electric and very low-emission vehicles. For many businesses and individuals, an electric company car can now work out significantly more tax-efficient than an equivalent cash allowance used to fund a personally owned vehicle, particularly once the employer's ability to reclaim VAT on a genuinely business-used vehicle and claim capital allowances is factored into the comparison.

Mileage Matters Too

The comparison isn't purely about the vehicle itself - how the car is actually used matters enormously. An employee doing significant business mileage in a company car can claim tax-free mileage payments for fuel at HMRC's advisory rates, while private fuel provided by the company, if not properly accounted for, can trigger an additional and often unfavourable fuel benefit charge. Someone using a personally owned vehicle for business mileage, funded by a cash allowance, can instead claim tax-free mileage allowance payments at HMRC's approved rates, which for many lower-mileage drivers can be a genuinely efficient way to be reimbursed for business use without the fixed costs of a company car scheme.

There's No Single Right Answer

Given how much the right choice depends on the specific vehicle, its emissions, expected private use, and individual mileage patterns, there's no single answer that suits every business or every employee. A company car scheme heavily weighted towards electric vehicles can be genuinely attractive from a tax perspective for both employer and employee, while a business with staff doing high personal mileage in modest, low-cost vehicles might find a cash allowance remains the simpler and more cost-effective option.

Modelling Your Specific Situation

Rather than relying on a general assumption about which option is more efficient, it's worth modelling your actual numbers - the specific vehicles under consideration, their emissions and list price, expected business and private mileage, and the comparative cost to both the business and the individual under each option. This kind of comparison, run properly with real figures, often produces a clearer and sometimes counterintuitive answer compared with simply following conventional wisdom that may no longer reflect the current tax rules.

Reviewing an Existing Scheme

If your business already operates a company car scheme, or a cash allowance policy, that hasn't been reviewed since the tax treatment of electric vehicles improved so significantly, it's worth revisiting now rather than assuming your existing approach is still the most efficient one available. We're happy to help you run the numbers on your specific fleet or allowance policy.