BMW i4 vs Tesla Model 3: home charging cost

At the July 2026 Ofgem price cap (26.11p/kWh), the Tesla Model 3 costs less to charge — it is the cheaper of the two to run at 6.5p per mile vs 6.6p for the BMW i4 — a difference of about £14.33 over 10,000 miles of home charging.

Prices based on the Ofgem price cap of 26.11 p/kWh, effective 1 July 2026.Source: Ofgem

	BMW i4eDrive40	Tesla Model 3RWD
Full charge cost	£23.94	£17.06
Cost per mile	6.6p	6.5p
20-80% on a 7 kW wallbox	6 hr 55 min	4 hr 56 min
Usable battery	80.7 kWh	57.5 kWh
WLTP range	367 miles	318 miles
Efficiency	4.5 mi/kWh	4.6 mi/kWh
Max AC charging	11 kW	11 kW

At a glance

Full charge cost (lower is better)

BMW i4£23.94

Tesla Model 3£17.06

Running cost per mile (lower is better)

BMW i46.6p

Tesla Model 36.5p

20-80% time on a 7 kW wallbox (lower is better)

BMW i46 hr 55 min

Tesla Model 34 hr 56 min

The bigger battery costs more to fill but is not necessarily more expensive to run — cost per mile depends on efficiency, not battery size. Costs include ~12% AC charging losses.