EV running cost in India: calculate cost per kilometre honestly

A transparent method for comparing EV and petrol or diesel running costs using real tariffs, charging mix, efficiency and annual distance.

By MyMotorInfo Research Desk · 22 Aug 2026

Cost per kilometre is an input-driven estimate

An electric vehicle does not have one permanent running-cost number. The answer changes with electricity tariff, charging location, vehicle efficiency, charging loss, weather, speed, load and annual distance. A fair comparison uses the same journey and ownership period for every powertrain.

NITI Aayog’s e-AMRIT tools ask users for annual distance, battery capacity, vehicle range, domestic tariff, public charging price and the proportion charged at each location. That structure is more honest than multiplying a brochure range by a single national electricity price.

Start with measured energy efficiency

There are two useful ways to express EV efficiency:

kilometres per kWh; or
kWh per 100 kilometres.

If a car travels 300 km using 50 kWh from the battery, its battery-to-wheel efficiency is 6 km/kWh, or about 16.7 kWh/100 km. Electricity drawn from the meter will normally be higher because charging is not lossless.

For purchase planning, create three cases:

optimistic mild-weather city use;
typical mixed use based on your commute;
conservative highway, heat, cold, rain or heavy-load use.

Do not use the best case for loan or household-budget decisions.

Calculate a weighted electricity price

Many owners use more than one charging source. Calculate a weighted price instead of choosing only the cheapest tariff.

Example assumptions:

80% of energy at home for ₹8/kWh;
20% at public chargers for ₹20/kWh.

Weighted price:

(0.80 × ₹8) + (0.20 × ₹20) = ₹10.40/kWh

Replace these example values with the applicable domestic bill and public operator price. Include fixed, parking, session or idle fees when they are caused by charging. State tariffs and operator prices can change, so date every input.

Include charging losses

If the vehicle consumes 15 kWh/100 km from the battery and the planning loss is 12%, energy drawn from the meter is approximately:

15 ÷ (1 - 0.12) = 17.05 kWh/100 km

At a weighted ₹10.40/kWh, the estimated electricity cost is:

17.05 × ₹10.40 = ₹177.32 per 100 km

Estimated energy cost per kilometre:

₹177.32 ÷ 100 = ₹1.77/km

This is an illustration, not a claim about a specific model. Use a measured wall-meter value where available.

Compare petrol, diesel or CNG on the same date

For liquid fuel:

fuel price per litre ÷ real efficiency in km/litre = fuel cost per km

If petrol is ₹105/litre and observed efficiency is 14 km/litre, the fuel-only estimate is ₹7.50/km. Do not compare that conservative observed petrol figure with an optimistic certified EV range. Use owner-relevant, defensible conditions for both.

For CNG, use the actual unit price and observed kilometres per kilogram. Record whether the journey includes petrol operation and account for reduced luggage space or range only as separate practical factors, not hidden arithmetic.

Use the MyMotorInfo EV running-cost calculator and fuel-cost calculator to preserve the inputs in a shareable calculation.

Energy cost is not total cost of ownership

A vehicle with a lower energy cost can still cost more overall. Add:

on-road purchase price;
loan interest and fees;
insurance;
scheduled maintenance;
tyres and alignment;
parking and tolls;
home-charger equipment and installation;
public charging membership or idle fees;
battery or vehicle warranty limitations;
expected resale value, shown as an uncertain scenario rather than a guarantee.

Do not automatically enter a battery replacement cost if the planned ownership period is within a valid warranty, and do not automatically enter zero. Record the warranty terms and model multiple outcomes.

Convert the difference into a break-even distance

Suppose an EV costs ₹300,000 more upfront after comparing like-for-like equipment, and the energy saving is ₹5/km. Ignoring financing and other differences, the simple energy break-even distance is:

₹300,000 ÷ ₹5/km = 60,000 km

This is not a promise of payback. Add financing, charger installation, maintenance, insurance and resale scenarios. The result is especially sensitive for low annual mileage.

The MyMotorInfo ownership-cost calculator is designed for this wider comparison.

Create a one-year evidence log

After purchase, record monthly:

odometer distance;
home meter or charger energy;
public charging energy and receipts;
total charging spend;
seasonal conditions and unusual trips;
maintenance and tyre spend.

Then calculate:

total charging spend ÷ kilometres travelled

and

total meter kWh ÷ kilometres travelled × 100

This measured result is more useful than a dashboard average that may exclude charging loss.

Common misleading comparisons

Using the lowest domestic tariff while relying heavily on public fast charging.
Ignoring charging losses for the EV but using real pump receipts for the petrol car.
Using certified range for one vehicle and congested-city mileage for another.
Comparing different vehicle sizes, performance or equipment.
Treating free workplace charging as guaranteed for the full ownership period.
Leaving annual distance unstated.
Calling fuel or electricity cost “total ownership cost”.

The responsible conclusion

An honest EV running-cost estimate shows efficiency, charging loss, tariff date, home-public split and distance. Keep energy cost separate from total ownership cost and publish optimistic, typical and conservative cases. Recalculate when tariffs, routes or charging habits change.