This is from the Governments fuel duty site. How much is fuel duty. The fuel duty rate in the UK is 52.95 per litre for petrol and diesel. This rate was cut in 2022 and has now been extended for the 2025-2026 tax year. This rate does not include VAT. Based on an average of 36 miles per gallon (MPG) a petrol car’s per-mile fuel duty cost currenty reach 7p. However , diesel vehicles, with an average of 43mpg, achieve a cost per mile of 6p. Hybrids, which have an average of around 59mpg, have a per-mile cost of 4p. 26 Nov 2025
So EV driver will be paying 3p per mile plus the cost to charge, as I can charge up at home 7 1/5 pence a kWh, those less fortunate 27/28 pence a kWh and those using public chargers 50/80 pence a kWh So my understanding in theory based on the 3 pence a mile I would be better of with a hybrid using fossil fuel than a EV, or even a diesel or petrol ?
No @Oscarmax, you’re only looking at the fuel duty cost, not the overall price per litre/gallon.
On my cheap Octopus rate, I pay 6.7p per kWh, standard rate 29p per kWh.
That translates into a cost per mile of between 1.8p and 2.2p depending on the weather/efficiency.
My equivalent cost for my last car, a Volvo XC40 which averaged 34 MPG, was 18p per mile.
I’ve just costed an ICE car doing 45MPG (£1.45/litre) at 14.3p/mile.
So even taking into account the 3p per mile penalty coming in 2028, an EV is far cheaper to run as long as you can charge at home on the cheap rate.
As @Glos Guy says, this 3p per mile will probably escalate afterwards, but who knows what the price of diesel and petrol will be by then?
2024 - BMW i4 Grand Coupe eDrive 35 Sport
2020 - Volvo XC40 T4 Inscription
2017 - Audi Q3 TFSi Sport S-Tronic