Petrol, diesel, hybrid or EV : what it actually costs you ?

Most people shop for a car by looking at just one number i.e the on-road price. This is how smart buyers end up making expensive mistakes. Every vehicle, whether petrol, diesel, hybrid or electric has four distinct cost categories that all affect each other:

1. Entry cost: Ex-showroom price, GST, road tax, registration and your first year's insurance. Which is everything you pay before you drive it home.
2. Running cost: fuel or electricity spent, which depends directly on how many kilometers you drive and the climate where you drive it.
3. Maintenance cost: servicing, tyres, tolls, insurance renewals, loan interest if you finance it and for EVs or hybrids, a potential battery replacement.
4. Resale value: what you get back when you eventually sell it, shaped as much by government rules (age limits, scrappage policies) as by actual market demand.

The calculator below adds up all four cost blocks based on your specific car, your state, your driving habits and your situation which includes whether you're buying new or used, for personal use or commercial purposes.

Since the 56th GST Council meeting, effective 22 September 2025, the old four-slab structure (5/12/18/28% plus a compensation cess of up to 22%) was scrapped for passenger vehicles:

This is why a hybrid SUV and a diesel SUV of the same footprint end up taxed identically at 40%, while the EV variant of the exact same car is taxed at 5%, the price gap between them is mostly about which GST bucket they fall into, not the hardware.

One nuance worth knowing: if the car is bought for a passenger/transport business i.e a cab, a rental fleet, a driving school then the GST paid can usually be claimed back as input tax credit under Section 17(5)(a). For a private buyer this GST is a sunk cost but for a registered transport operator, it often isn't. The calculator below has a toggle for this.

Road tax is a state subject which is the single biggest reason two identical cars can cost ₹1–2 lakh apart depending on which RTO you register at. The calculator carries illustrative one-time rates for all 28 states and 8 union territories. Please treat every number as a starting point, not a quote.

Commercial registration (yellow plate: cabs, rentals) typically carries a different tax structure again, often higher than private one-time tax. The calculator applies an illustrative loading for this when you flag commercial use.

• Minimum cover just got longer, again. IRDAI mandated 3-year third-party cover for new cars from September 2018. In 2026 the Supreme Court extended this to 4 years upfront for new cars.
• Comprehensive cover is priced off Insured Declared Value (IDV), which depreciates fastest in year one and roughly 5–10%/year after.
• EVs carry a real premium: Expensive battery packs, imported parts, thinner repair networks. 30–45% higher than petrol is common.
• Commercial/cab insurance runs meaningfully higher again where more kilometres, more passengers, higher claim frequency, and mandatory passenger-cover add-ons.
• PUC status now gates your insurance renewal according to the Supreme Court direction in the M.C. Mehta case made a valid PUC a precondition for policy renewal.

• Private vehicles face a mandatory fitness test after 15 years and de-registration if unfit or unrenewed by 20 years. A green tax applies on renewal past 15 years.
• Scrapping a vehicle earns a certificate worth roughly 4–6% of a new car's ex-showroom price, often paired with a manufacturer discount and a state road-tax rebate on the replacement vehicle.
• Buying used sidesteps GST and road tax entirely: Those which were already paid by the first owner, it also means you inherit however many years the NCR age ban or the national scrappage clock has already used up. A 7-year-old diesel bought in Gurugram has 3 years of legal life left, not the 10 a buyer might assume from the purchase date alone.

• GST Council revisits the 5% EV rate : a Council decision away, not a law change.
• More states copy Karnataka's road-tax slab : A 0-to-10% swing is worth ₹1–3 lakh on a mid-size EV.
• Battery warranty vs. real life diverge : Budget for the replacement scenario at high annual km.
• EV resale market matures : Today's low resale reflects a thin secondhand market, not the car's real remaining life.
• Heat and cold cut EV range in ways brochures don't show : The climate-zone setting above is a real effect, not a rounding error, especially for high-altitude and desert buyers.
• Commercial-use rules shift fastest : Cab-aggregator regulation, ITC eligibility and commercial insurance loading are all more actively revised than private-vehicle rules.
• Interest rates move : A financed purchase is exposed to repo-rate cycles. A 2-point swing over 5 years can outweigh most tax differences above.

• Check your registration state's current road-tax notification for EVs on the transport department website.
• Confirm which GST slab your specific variant falls into as it's a straight 18-vs-40% swing.
• Get an actual insurance quote for the fuel type and use case (private vs. commercial) you're leaning toward.
• If you're in the wider NCR region and considering diesel i.e new or used, do run the 10-year age-ban into your resale plan, not just the national 15–20 year scrappage timeline.
• Buying used: Ask for the registration date, not just the model year, and check how many "legal years" are actually left before an age ban or fitness test applies in your city.
• Buying for commercial use: Confirm ITC eligibility with your accountant before assuming the GST is recoverable as it depends on registration type and exclusive business use.
• Re-run this calculator with your dealer's actual on-road quote once you have it.