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. Pick a plan (Tata, MG, Maruti, Citroen) or enter your own quote, set your real monthly driving, and see whether that trade saves you money.
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 and any resale-value difference from not owning the battery.
How the BaaS calculator works
Two moving parts: the upfront saving (buying without the battery, typically ₹2–5.5 lakh off) and the battery rental (₹/km, often with a minimum-km floor). We bill max(your km, floor) × rate over your ownership years and set it against the upfront cut.
If total rental stays below the saving for as long as you keep the car, BaaS leaves you ahead. The break-even readout shows when rental overtakes the saving.
Reading your result honestly
Watch the effective per-km rate. A 2,000 km floor with 800 km of driving means you pay the floor — and your real rate can be 2.5× advertised. Also remember road tax, insurance and TCS are separate either way, and a BaaS car resells with the subscription attached.
Check subsidies and how the lower BaaS price changes your EMI.
What Battery as a Service actually is
You buy the vehicle at a reduced price and lease the pack — per km, monthly, or both. The battery stays the provider’s asset. Because packs are often 35–45% of EV cost, removing them from the purchase price changes financing and down payment dramatically.
When BaaS genuinely makes sense
Best for high-utilisation users (cabs, delivery, fleets) and buyers blocked by upfront price. Rarely pays for low-mileage private owners (500–800 km/month) with a high km floor — buying the pack and keeping the car 7–8 years is usually cheaper.
The clauses that decide whether it is a good deal
Read the minimum monthly km, lock-in / exit, and degradation & replacement guarantees. Check resale transfer of the subscription and what the fee excludes (road tax, insurance, charging).
How to use the result above
Compare break-even against how long you actually keep the car. Run realistic monthly distance, not an optimistic one. Model financing separately: lower purchase price means a smaller loan — check the EMI calculator.
Indicative only. Preset rates and savings are entry-trim ballparks and change by variant, city and scheme — verify against your dealer quote before deciding.
Frequently asked questions
It compares the upfront price cut from buying without the battery versus total per-km rental over the years you keep the car. It also shows monthly rental, effective ₹/km after any minimum-km floor, and when cumulative rental overtakes the upfront saving.
Many plans bill a monthly distance floor whether you drive it or not. Drive less than the floor and your effective ₹/km rises above the advertised rate — often the detail that flips the decision.
When 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, long-ownership drivers often pay more in rental than the pack would have cost.
Presets use indicative entry-trim ballparks (e.g. Tata ~₹2.60/km, Citroen eC3X ~₹2.26/km with a 2,000 km floor, Maruti e Vitara ~₹3.99/km with 1,800 km floor, MG Windsor ~₹3.90–4.50/km). Exact rates change by variant and city — edit fields to match your dealer quote.
Road tax, insurance, TCS and electricity (same either way), plus resale effects of transferring a subscription-attached car. Treat the output as directional, not a quote.