When an EV becomes cheaper than petrol
An electric car costs more to buy and much less to run. Whether it works out cheaper depends on one thing: how many kilometres you drive before you sell it. Below that break-even distance the petrol car wins, above it the EV does.
Formula
Break-even km = price premium ÷ (petrol cost per km − EV cost per km)
- Petrol cost per km = fuel price ÷ mileage in km/l
- EV cost per km = electricity tariff ÷ efficiency in km/kWh
- Add the difference in servicing costs to the running-cost gap
The running-cost gap is large
A petrol hatchback at ₹105 a litre and 15 km/l costs ₹7 a kilometre. An EV doing about 7 km per kWh charged at home at ₹8 a unit costs roughly ₹1.15 a kilometre — a saving of nearly ₹5.90 for every kilometre driven.
Over 1,500 km a month that is about ₹8,800 saved monthly, or ₹1.05 lakh a year. Fast public charging costs considerably more per unit, so the saving shrinks if you cannot charge at home.
Where the break-even lands
If the EV costs ₹4 lakh more to buy, the premium is recovered after roughly 68,000 km. Someone driving 18,000 km a year gets there in under four years; someone driving 6,000 km a year takes over eleven.
Lower road tax and registration charges for EVs in many states, and cheaper scheduled servicing, pull the break-even closer. Home charger installation and higher insurance premiums push it further away.
Battery, warranty, and resale
The battery is the expensive component and is typically covered by a warranty of around eight years or a specified mileage. Replacement outside warranty is costly, though gradual capacity loss is the more common outcome than outright failure.
EV resale values are still settling and depend heavily on battery health and how quickly newer models improve. A shorter ownership period carries more of this uncertainty.
The things that decide it in practice
Home or office charging is close to essential. Without it, both the cost advantage and the convenience shrink, and public charging on long routes still requires planning.
If most of your driving is a predictable urban commute with overnight charging, the EV case is strong. If you drive little, or frequently take long unplanned highway trips, petrol remains the simpler choice.
Break-even on a ₹4 lakh premium
- Petrol running cost
- ₹7.00 per km
- EV running cost (home charging)
- ≈ ₹1.15 per km
- Saving per km
- ≈ ₹5.85
- Price premium
- ₹4,00,000
- Break-even distance
- ≈ 68,000 km
- At 18,000 km a year
- ≈ 3.8 years
High-mileage drivers with home charging recover the premium comfortably. Light users may never reach break-even before selling the car.