Company Model 3, mostly charged at home
For 6,000 business miles with 80% home charging, the HMRC benchmark blends the 7p home and 15p public rates. Your actual energy cost may be lower on an overnight tariff.
EV Mileage Reimbursement Calculator
Estimate business mileage payments, charging cost and possible tax relief for a company or personally owned Tesla.
Your business mileage
miles
p/mile
Company EV advisory rates: 7p home and 15p public from 1 September 2026. Own-car mileage allowance: 45p for the first 10,000 business miles, then 25p.
80%
p/kWh
p/kWh
4.0 mi/kWh
Employer reimbursement
£420
7p × 6,000 business miles
Estimated charging cost
£511
Based on your charging mix and real-world efficiency
Net after electricity
£-91
Before insurance, depreciation and other ownership costs
HMRC benchmark amount
£516
Blended 7p home / 15p public advisory rate
How this calculator works
Company-car calculations use the home/public charging mix to build the HMRC benchmark, while the charging-cost estimate uses your actual electricity rates and vehicle efficiency.
For a personally owned car, the calculator applies the 45p/25p approved mileage amounts and estimates tax relief when the employer payment is lower.
Data quality
Last updated 5 September 2026
Rates can change. Use your own quote, tariff or vehicle documents where available.
Worked examples
Own Model Y, 12,000 business miles
The approved amount is 10,000 miles at 45p plus 2,000 at 25p. If the employer pays less, the difference may qualify for Mileage Allowance Relief.
Frequently asked questions
What is the HMRC electric company-car mileage rate from September 2026?+
From 1 September 2026, HMRC's advisory electric rates are 7p per business mile for home charging and 15p per mile for public charging. Employers can use a blended rate where evidence supports the charging mix.
Can I claim 45p per mile in my own electric car?+
For an employee using their own car for business travel, the approved mileage amount is generally 45p per mile for the first 10,000 business miles in the tax year and 25p thereafter. The same mileage framework can apply to an employee-owned electric car.
Can I claim tax relief if my employer pays less?+
For an employee-owned car, you may be able to claim Mileage Allowance Relief on the difference between HMRC's approved amount and what your employer paid. Tax relief is on the shortfall at your marginal tax rate, not a repayment of the whole shortfall.
Related tools and guides
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