Question 1

How much does it cost to charge a Tesla?

Accepted Answer

Your cost comes down to two numbers: how much energy the car uses (its efficiency, in Wh per mile or kWh per 100 km) and what you pay per kWh. A typical Model 3 or Model Y uses around 250 Wh/mi, so at a UK home rate of 27p/kWh that's roughly 7p per mile, or about £6.75 to add 100 miles. Charge on a cheap overnight EV tariff and the same 100 miles can drop closer to £2.50.

Question 2

Is it cheaper to charge at home or at a Supercharger?

Accepted Answer

Home charging is almost always cheaper. A standard home tariff runs around 24–30p/kWh in the UK and an off-peak EV tariff can be 10p or less, while Superchargers typically sit at 30–45p/kWh and public rapid chargers can be 50–90p/kWh. Doing the bulk of your charging at home and using Superchargers only on longer trips is the single biggest thing you can do to cut running costs.

Question 3

Does battery degradation make my Tesla cost more to run?

Accepted Answer

Not really — degradation lowers how far a full charge takes you, but it barely changes the cost per mile, because you're still paying for the same energy to cover the same distance. What genuinely moves your cost per mile is efficiency: motorway speeds, cold weather and heavy climate-control use all push consumption up, so the car costs a little more per mile in winter than in mild conditions.

Question 4

How do I find my Tesla's energy consumption?

Accepted Answer

Your Tesla shows it in the Energy app as a lifetime or trip average in Wh/mi (or Wh/km). Use that figure in the calculator for a result tailored to how you actually drive, rather than a generic estimate. If you don't have it to hand, 250 Wh/mi is a reasonable starting point for a Model 3 or Model Y.

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