Company Car Tax for Trade Businesses — Is a Company Car Worth It in 2026?

The Key Point: A Company Car Creates a Benefit in Kind

Here's the thing that catches most trade owners out. A company car that is available for your private use creates a taxable Benefit in Kind (BiK) on you as the employee or director. You pay income tax on that benefit every year you have the car — even if you only drive it occasionally for personal trips. "Available for private use" is the trigger, not actual use.

A company van is treated completely differently. Instead of a percentage-of-value calculation, HMRC applies a much lower flat van benefit charge — and if your van's private use is only incidental (commuting plus the odd trip to the tip), there may be no benefit charge at all. That gap is why, for the overwhelming majority of trades, a van is the obvious choice. You almost certainly need a van anyway to carry tools and materials, and the tax treatment is generously favourable.

So this article is really for the director who, despite all that, wants a car — or is weighing up an electric car, which is the one scenario where a company car can genuinely stack up.

How Company Car BiK Is Calculated

The taxable benefit on a company car is worked out from three things:

• The list price (P11D value) — the manufacturer's list price including VAT, delivery and most factory options, regardless of any discount you actually paid.
• The appropriate percentage — set by HMRC based on the car's CO2 emissions, and for plug-in hybrids the electric-only range. The dirtier the car, the higher the percentage.
• Your marginal tax rate — 20%, 40% or 45% depending on your income.

The calculation is:

P11D value × appropriate percentage = taxable benefit (BiK).

You then pay income tax on that taxable benefit at your marginal rate, and the company pays Class 1A National Insurance on the same benefit figure. So a company car costs you (income tax) and the business (employer NIC) every single year.

A quick worked example. A petrol car with a P11D value of £35,000 and an appropriate percentage of 32% gives a taxable benefit of £11,200. As a 40% taxpayer you'd pay roughly £4,480 of income tax a year, and the company would pay Class 1A NIC on the £11,200 on top. That's a recurring bill, year after year, just for having the car available.

Electric Cars: The One Case Where It Works

Fully electric cars carry a very low appropriate percentage — just a few percent — because they produce zero tailpipe CO2. That single fact flips the whole calculation. Take the same £35,000 P11D value but as an electric car at, say, 3%: the taxable benefit is only £1,050, and your annual income tax as a 40% payer is around £420. Compare that with £4,480 on the petrol equivalent.

On top of the tiny BiK, an electric company car brings two more advantages:

• 100% first-year allowances. A new, fully electric (zero-emission) car qualifies for a 100% first-year capital allowance, so the company can deduct the full cost against profits in year one. Petrol and diesel cars get nothing like this.
• Running costs through the company. Charging, insurance, servicing and the rest can be met by the business, and providing electricity for an electric company car does not create the punitive fuel benefit that petrol and diesel attract.

If you've decided you want a car in the business, an electric one is almost always the way to do it. The BiK is low, the corporation tax relief is immediate, and the maths actually works in your favour.

Fuel Benefit: Watch Out for Private Fuel

If the company pays for your private fuel in a petrol or diesel company car, a separate car fuel benefit applies — and it is notoriously punitive. It's calculated by applying the same appropriate percentage to a fixed fuel benefit figure set by HMRC, which produces a large taxable benefit that very few drivers cover in actual private fuel saved.

In almost all cases it is cheaper for the director to pay for their own private fuel, or to fully reimburse the company for the private mileage element, so that no fuel benefit arises at all. Genuine business mileage in a company car can be reimbursed using HMRC's advisory fuel rates without creating a benefit. As noted above, electricity for an electric company car does not trigger the car fuel benefit.

Petrol and Diesel Cars: Usually a Poor Deal

For a petrol or diesel car, high CO2 emissions mean a high appropriate percentage, which means a large taxable benefit and a big annual tax bill — for you and for the company via Class 1A NIC. Add the fuel benefit trap and the cost stacks up fast.

For most trade directors, it works out cheaper overall to own a petrol or diesel car personally and claim the approved mileage allowance for business journeys — 45p per mile for the first 10,000 business miles in a tax year and 25p per mile after that. You keep the car out of the company entirely, avoid the BiK and Class 1A NIC, and still get tax-free relief for the work-related driving you actually do. For a guide on running the numbers, see our company van tax and mileage articles.

Corporation Tax and Capital Allowances on Cars

Cars are treated less generously than most business equipment for capital allowances. Crucially, cars do not qualify for the Annual Investment Allowance (AIA) that lets you write off vans, tools and plant in full. Instead, relief on a car comes through:

• Writing-down allowances based on CO2. Lower-emission cars go into the main pool and attract a higher writing-down rate; higher-emission cars go into the special rate pool and attract a much lower rate, so relief is spread over many years.
• 100% first-year allowance for new zero-emission (electric) cars. This is the standout exception — full relief in year one, which is a big part of why electric company cars are attractive.

If you lease a car rather than buy it, the lease payments are generally deductible, but there is a partial disallowance (a flat percentage add-back) for higher-emission cars, reducing how much of the lease cost you can set against profits. Electric and low-emission leases avoid this restriction.

VAT on Company Cars

VAT is another area where cars lose out compared with vans:

• Buying a car: you generally cannot reclaim the VAT. The only exception is a car used 100% for business with absolutely no private use available — which is extremely rare and hard to prove, so in practice the VAT on a purchased car is lost.
• Leasing a car: you can usually reclaim 50% of the VAT on the lease rental, the restriction reflecting the assumed private use.
• Fuel: you can reclaim VAT on fuel used for genuine business mileage, subject to keeping the right records (and the fuel scale charge if the company also covers private fuel).

Vans, by contrast, generally allow full VAT recovery on purchase where there's business use — another reason a van wins for most trades.

A Simple Decision Steer

• Van — usually best for trades. Low flat van benefit charge (or none if private use is incidental), full AIA on purchase, full VAT recovery on business use. You probably need one anyway.
• Electric car — can work well. Tiny BiK, 100% first-year allowance on a new EV, no punitive fuel benefit on electricity. The one scenario where a company car genuinely stacks up.
• Petrol or diesel car — usually poor value. High BiK, Class 1A NIC, fuel benefit trap, no AIA and no VAT recovery on purchase. Most directors are better off owning it personally and claiming mileage.

Quick Reference: Van vs Electric Car vs Petrol/Diesel Car

The Bottom Line

For nearly every trade business, a van is the right vehicle to put through the company — it's the work tool you need and HMRC taxes it gently. If you want a car, make it electric: the low BiK, immediate corporation tax relief and absence of fuel benefit are what make a company car worthwhile. A petrol or diesel car through the company is, for most directors, the worst of all worlds compared with owning it personally and claiming the approved mileage allowance for business journeys.

This article is general information, not tax advice. Vehicle tax interacts with your wider profit, salary and dividend position, and HMRC rates and percentages change. Always run your specific numbers past a qualified accountant before committing to a company car or van.