Accounting for Petrol in the accounts is simple. However, how do I account for the cost of charging my new electric vehicle?
Cheers
Gary
I guess you’d have to make your best estimate of the cost.
The internet said:
The amount of electricity required to charge an electric vehicle (EV) depends on the battery capacity and charging efficiency. Most EVs have batteries between 40 kWh and 100+ kWh, so a full charge typically requires that amount of energy. However, due to energy losses during charging—mainly as heat—you’ll need about 10–15% more electricity than the battery’s stated capacity.
For example:
A 60 kWh battery will require approximately 66–69 kWh to charge from 0% to 100%.
A 100 kWh battery will need around 110–115 kWh for a full charge.
and
As of January to March 2026, the average cost of electricity in the UK is 27.69p per kWh for households on standard variable tariffs paying by direct debit, according to the latest Ofgem energy price cap.
So a kWh is about 28 pence
Say you had a 100 kWh battery and you were charging up up from 0% to 100%, I guess it would be reasonable to estimate the cost to be 115 kWh x 28p = £32.20
If you were recharging from say 40%, then it would be reasonable to estimate the cost to be (60% x 115) x 28p = £19.32
If you are charging from home, then it could be reasonable to include a portion of the standing charge into the calculations.
This means you’d have fixed costs plus variable costs.
But this might be overkill.
Hope this helps 
That depends on whether you’re claiming the full cost of charging, or just the rates for the business miles you’re doing. Is this a company car? Most electric car chargers have an app which can tell you how long it took to fully charge and the kWh used. You can then work out the cost using your electricity tariff.