A Tesla provided by your employer for private use is treated as a benefit in kind, and Tesla company car tax is calculated at the lowest rate available to any car on UK roads: 3% of the list price in 2025/26, rising to 4% in 2026/27. On a Model 3 with a P11D value around £42,000, that works out to roughly £28 a month for a basic-rate taxpayer in the current year, or about £56 a month if you pay tax at 40%. The rate climbs each year through the end of the decade, but even in 2029/30 a Tesla will be taxed at roughly a quarter of what a comparable petrol car costs.
Benefit-in-Kind Rates Through 2029/30
Company car tax is set by the vehicle’s CO2 emissions. Every Tesla produces zero tailpipe emissions and sits in the lowest band. HMRC has already published the appropriate percentages for zero-emission vehicles through the end of the decade:1GOV.UK. Work Out the Appropriate Percentage for Company Car Benefits (480: Appendix 2)
- 2025/26: 3%
- 2026/27: 4%
- 2027/28: 5%
- 2028/29: 7%
- 2029/30: 9%
By comparison, a petrol or diesel car emitting 130 g/km sits at 32% in 2026/27, and the ceiling for the highest-emitting cars is 37%. Knowing the rate for the year the car will be on your driveway is the starting point for every other number in this article.
How the P11D Value Is Built
The P11D value is the figure your tax is calculated against. It is the manufacturer’s list price including 20% VAT, plus delivery charges and any factory-fitted options. If you specified Full Self-Driving capability, a premium paint colour, or upgraded wheels, those add to the P11D.
Two things are left out: the first registration fee and annual vehicle excise duty. Any discount your employer or fleet provider negotiates also does not reduce the P11D. The calculation uses the full list price regardless of what was actually paid, which surprises some drivers. For a Tesla Model Y Long Range, P11D values currently run around £50,000 to £60,000 depending on trim and options.
What You Will Actually Pay
Your annual tax is the P11D value multiplied by the BiK percentage for the year, then multiplied by your marginal income tax rate. Here is that calculation for a Tesla Model 3 at £42,000 in 2026/27, when the rate is 4%:
- Taxable benefit: £42,000 × 4% = £1,680
- Basic rate (20%): £336 a year, or £28 a month
- Higher rate (40%): £672 a year, or £56 a month
- Additional rate (45%): £756 a year, or £63 a month
Those figures are the total cost of having the car available for private use. HMRC collects the tax by adjusting your PAYE tax code, so the deduction comes out of your monthly pay automatically.2GOV.UK. Tax on Company Cars To run the numbers against your own quote, swap in the actual P11D value from the order form and the BiK rate for the year the car will be delivered.
Why Salary Sacrifice Amplifies the Saving
Most Teslas taken as company cars come through salary sacrifice. You give up a slice of gross salary and your employer leases the car on your behalf. Because your gross pay drops, so does your income tax and employee National Insurance on the sacrificed amount. The only tax you pick up in exchange is the BiK charge, and at 3% or 4% that charge is small.
Take a higher-rate taxpayer earning £70,000 who sacrifices £500 a month (£6,000 a year) for a Tesla Model 3. Without the arrangement, that £6,000 loses £2,400 to income tax at 40% and £120 to employee NIC at 2%, leaving £3,480 of take-home pay. With sacrifice, the £6,000 leaves gross pay entirely, and the only tax added back is BiK of £672 a year on the £42,000 car at 4%. The lease payment usually bundles in insurance, servicing, and breakdown cover, which sharpens the comparison further.
Company Car or Cash Allowance
If your employer offers a choice between a Tesla and a cash allowance, the tax treatment usually tilts hard toward the car. A cash allowance is ordinary salary, taxed at your full marginal rate plus employee NIC.3GOV.UK. Income Tax Rates and Personal Allowances A £500 monthly allowance costs a higher-rate taxpayer roughly £290 in combined tax and NIC before any lease, insurance, or charging bill.
A company Tesla at the same time costs that taxpayer £56 a month in BiK. Taking the cash and buying an EV privately rarely produces a better outcome unless you drive very little or already own a car outright. Run your own figures through HMRC’s company car tax calculator before signing anything.
Charging: What Is Tax-Free and What Is Not
When you drive your company Tesla on business, your employer can reimburse charging costs tax-free up to HMRC’s advisory electricity rate. From 1 June 2026, this splits into two figures for fully electric cars:4GOV.UK. Advisory Fuel Rates
- Home charging: 7 pence per mile
- Public charging: 15 pence per mile
If your actual public charging costs exceed 15p per mile, your employer can reimburse the higher amount as long as you keep receipts. Anything paid above the advisory rate without evidence is taxable income. Keep a mileage log that separates business from personal miles. Without records, HMRC can treat all miles as private.
Workplace charging is treated separately and generously. If your employer provides charging points at or near the workplace and makes them available to employees generally, using them does not trigger a fuel benefit charge, even for personal miles. The exemption sits in section 237A of ITEPA and covers both income tax and National Insurance.5GOV.UK. Workplace Charging for All-Electric and Plug-in Hybrid Vehicles
Home charging for personal miles is different. If your employer pays your home electricity bill or reimburses personal charging beyond the advisory rate, the excess becomes a taxable benefit. The cleanest approach is to keep business and personal mileage separate and claim reimbursement only for business miles.
Vehicle Excise Duty No Longer Zero
The road tax exemption for electric cars ended in April 2025. Fully electric vehicles registered on or after 1 April 2025 pay £10 in the first year and then the standard £200 a year. Cars registered between April 2017 and March 2025 moved straight to the £200 standard rate.6GOV.UK. Vehicle Tax for Electric and Low Emissions Vehicles VED is typically the employer’s cost, and it is excluded from the P11D calculation, so it does not change your BiK bill.
How the Tax Reaches You
Employers currently report company car benefits to HMRC through the annual P11D form, which records the P11D value, the date the car was made available, its CO2 emissions, and the electric range.7GOV.UK. Expenses and Benefits for Employers – Reporting and Paying When the car is first provided or withdrawn, the employer files a P46(Car) so HMRC can adjust your tax code promptly.8GOV.UK. Tell HMRC About a Car Provided to an Employee for Private Use
This changes from April 2027. Payrolling of benefits in kind becomes mandatory for most benefits, replacing the P11D route. Employers can register voluntarily until 5 April 2026 to payroll benefits for the 2026/27 tax year, and HMRC is encouraging early adoption.9GOV.UK. Getting Ready for Mandatory Payrolling of Benefits in Kind Once payrolling is in place, the BiK value is taxed through your monthly pay in real time rather than settled after the year ends. For most employees, the practical effect is small, because company car tax is already collected through tax code adjustments today.