Free Tool · Battery as a Service
BaaS Calculator
Battery as a Service cuts lakhs off an EV's price — then charges you per kilometre for the battery. This calculator tells you whether that trade actually saves you money: pick a 2026 plan (Tata, MG, Maruti, Citroen) or enter your own quote, set your real monthly driving, and see the verdict.
Your BaaS plan
BaaS keeps you ahead by over 5 years
Upfront saving of ₹2,30,000 minus ₹1,56,000 of battery rental over 60 months.
Upfront saving vs total rental paid
Indicative only. Preset rates and savings are entry-trim ballparks that change by variant and city — edit them to match your dealer quote. Excludes road tax, insurance, TCS, electricity cost and any resale-value difference from not owning the battery.
How the BaaS calculator works
A Battery as a Service deal has two moving parts. On one side, the upfront saving — buying the car without its battery typically cuts ₹2–5.5 lakh off the ex-showroom price. On the other, the battery rental — a per-km rate (₹2.26 to ₹4.50 on 2026 plans) billed every month, often with a minimum-km floor you pay whether you drive it or not. The calculator multiplies your real monthly kilometres (or the floor, whichever is higher) by the rate, totals it over your ownership horizon, and sets it against the upfront saving.
The verdict is the number that matters: if total rental stays below the upfront saving for as long as you keep the car, BaaS leaves you ahead. The break-even readout shows when the rental overtakes the saving — if that lands beyond the years you'll realistically own the car, the plan works in your favour; if it lands inside them, you're paying for the convenience.
Reading your result honestly
Watch the effective per-km rate. If your plan has a 2,000 km monthly floor and you drive 800 km, you're paying the floor — and your real rate is 2.5× the advertised one. This single detail flips more BaaS decisions than any other. Also remember what the sum leaves out: road tax, insurance and TCS are billed separately either way, and a BaaS car can only be resold with its battery subscription attached, which can affect resale. Our full guide to Battery as a Service in India walks through every clause worth checking before you sign.
If the upfront price is what's holding you back, BaaS is one lever — but so are subsidies and financing. Check what you can claim on the EV subsidies guide, see how the lower BaaS price changes your monthly instalment with the EV EMI calculator, and browse BaaS-eligible electric cars in the catalog.
Indicative only. Preset rates and savings are entry-trim ballparks as of 2026 and change by variant, city and scheme revisions — always verify against your dealer quote before deciding.
Frequently asked questions
What does the BaaS calculator work out?+
It compares the two sides of a Battery as a Service deal: the upfront price cut you get by buying the car without its battery, versus the total per-km battery rental you'll pay over the years you keep the car. It also shows your real monthly rental, your effective per-km rate after any minimum-km floor, and the point at which cumulative rental overtakes the upfront saving.
Why does the minimum-km floor matter so much?+
Most Indian BaaS plans bill a minimum monthly distance — for example 1,800 km on the Maruti e Vitara or 2,000 km on the Citroen eC3X — whether you drive it or not. If you drive less than the floor, your effective per-km rate rises above the advertised rate. The calculator shows this inflation explicitly.
When is BaaS cheaper than buying the battery outright?+
Broadly, when your total rental over your ownership period stays below the upfront saving. Low-mileage drivers who keep the car a few years usually stay ahead; high-mileage drivers who keep the car many years usually pay more in rental than the battery would have cost. Run your own kilometres through the calculator to see where you land.
Are the preset rates accurate?+
The presets use indicative 2026 entry-trim figures — Tata at ₹2.60/km, Citroen eC3X at ₹2.26/km with a 2,000 km floor, Maruti e Vitara at ₹3.99/km with an 1,800 km floor, and MG Windsor at ₹3.90–₹4.50/km depending on battery. Exact rates change by variant and city, so every field stays editable — match them to your dealer quote.
What does the calculator leave out?+
Road tax, insurance, TCS and electricity costs (billed the same either way), and the resale-value effect of not owning the battery — a BaaS car transfers with its subscription attached, which can narrow the buyer pool. Treat the output as a directional estimate, not a quote.