The honest answer is: it depends almost entirely on your tariff. Charging is priced per kWh, so the cost of a full charge is roughly your usable battery size multiplied by your unit rate.
On a dedicated overnight EV off-peak rate, home charging is the cheapest energy most households buy. On the standard price-cap rate it costs several times more per mile, and public rapid charging can cost around ten times the off-peak rate for the same energy.
We don't quote a single headline figure here because it would be wrong for most people. Open any car page and enter your annual mileage and charging situation, the physics model computes your actual monthly cost, and shows the 2028 pay-per-mile road tax impact too. Every figure is explained on the methodology page.