Tax Efficient Cars: Company Car Tax Guide 2025/26

​Tax Efficient Cars: Low-Emission Company Cars — What You Need to Know for 2025/26

Tax efficient cars are increasingly important for businesses and employees alike.

With the 2025/26 UK tax year now in force, the Benefit-in-Kind (BiK) rates that determine company car tax continue to favour low-emission and electric vehicles — but these advantages are gradually changing.

Choosing the most appropriate vehicle can make a significant difference to both company costs and personal tax bills.

Why Choose Tax Efficient Cars for Your Business

One of the biggest ongoing incentives for company car drivers is lower company car tax on zero and ultra-low emission vehicles.

Fully electric cars are still among the most tax efficient cars you can offer or accept because they attract some of the lowest BiK percentages available.

For 2025/26, fully electric vehicles are taxed at just 3% of their list price — significantly lower than petrol, diesel or higher-emission vehicles.

Company Car Tax Rates for 2025/26

The appropriate percentage used to calculate the taxable benefit depends mainly on CO₂ emissions and — for plug-in hybrids — the electric-only range:

Infographic showing tax efficient cars for 2025/26, highlighting 3% Benefit-in-Kind for electric cars, higher rates for petrol and diesel, key costs such as fuel benefit charge and diesel surcharge, and how Trueman Brown can help with company car tax advice.

These low BiK rates make tax efficient cars particularly appealing for drivers taxed at higher income tax rates, as the taxable benefit is lower compared with conventional vehicles.

How Benefit-in-Kind (BiK) Works

Company car tax — the BiK charge — is calculated by taking the list price of the vehicle, applying the appropriate percentage based on emissions, and then multiplying by the employee’s marginal income tax rate (20%, 40% or 45%).

Simply put:

Taxable Benefit = List Price × Appropriate %

Annual Tax Payable = Taxable Benefit × Employee’s Tax Rate

Lower emissions (especially zero emissions) lead to lower appropriate percentages, which is why tax efficient cars such as EVs remain attractive in 2025/26.

Other Costs to Consider

Even with favourable company car tax treatment, some additional costs can impact the overall picture for tax efficient cars:

Fuel Benefit Charge:
If the employer pays for private fuel, there’s a separate taxable benefit (a fixed figure multiplied by the appropriate percentage).

Diesel Surcharge:
Diesel cars that don’t meet certain emissions standards can attract a higher charge.

Vehicle Excise Duty (Road Tax):
From April 2025, changes to VED mean electric and low-emission cars now attract some tax — though still lower than high-emission vehicles.

Tax Efficient Cars vs Salary Sacrifice Schemes

Salary sacrifice programmes can help spread the cost of a tax efficient car over time and may offer savings by reducing National Insurance and income tax liabilities.

However, company car tax (BiK) still applies on the benefit of the vehicle — so the real savings depend on the tax position of the employee and the type of vehicle chosen. Planning is key.

How Trueman Brown Can Help

Deciding on the most suitable tax efficient cars strategy — whether you’re an employer providing company cars or an employee evaluating an offer — can be complex under the 2025/26 tax rules.

At Trueman Brown, we can help you:

  • Assess which vehicles deliver the best tax outcome for your circumstances

  • Compare company car options against mileage reimbursement or alternative travel allowances

  • Understand the implications of electric, hybrid, and low-emission options

  • Ensure accurate reporting and BiK tax calculations for compliance and planning

For tailored advice, get in touch with us:
📧 mark@truemanbrown.co.uk
📞 01708 397262

Frequently Asked Questions (FAQ)

Q: What makes a car “tax efficient”?
A: A tax efficient car typically has low CO₂ emissions or is fully electric, resulting in lower Benefit-in-Kind percentages and lower taxable benefits.

Q: What is the lowest company car tax rate for 2025/26?
A: Pure electric vehicles attract one of the lowest BiK rates at around 3% for 2025/26.

Q: Are plug-in hybrids still good choices for tax efficiency?
A: Yes — PHEVs with long electric ranges can be very competitive among tax efficient cars, though their BiK rates rise with lower electric-only ranges.

Q: Does employer-paid fuel affect company car tax?
A: Yes — if the employer pays for personal fuel, a fuel benefit charge applies on top of the car BiK.

Q: How do tax efficient cars compare with reimbursing mileage?
A: Depending on your business’s mileage and tax position, reimbursing mileage at HMRC rates might be more tax efficient than a company car. We can help assess this for you.

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