EV vs Petrol Calculator: Calculate Your True Total Cost of Ownership in India

Buying a car in India in 2026 is no longer just about the showroom price. With petrol ranging from ₹94 to ₹108 per litre across major cities — ₹94.77 in Delhi, ₹103.44 in Mumbai, and ₹107.41 in Hyderabad — and electricity costing as little as ₹1.00–₹1.50 per kilometre for an EV (especially with 2026’s new Time-of-Day (ToD) off-peak tariffs and home-charging efficiency) — the gap between owning a petrol car and an electric vehicle has never been wider.

When you factor in the 100% Road Tax waivers still active in states like Tamil Nadu and Delhi, the financial significance of switching to electric has reached a tipping point.

But fuel cost is only one part of the story. The real question is your Total Cost of Ownership (TCO): the full financial picture across every rupee you spend from purchase day to resale.

This includes fuel or electricity, annual insurance, maintenance, government tax waivers (like 100% Road Tax savings), scrappage bonuses, and the money you recover when you sell. This calculator computes all of it, year by year, and plots exactly where the two vehicles cross over. That crossing point is your financial break-even.

Why Total Cost of Ownership Is the Only Number That Matters

The showroom price is the number car dealers want you to focus on. TCO is the number your bank account experiences. For EVs and petrol cars, these two figures tell completely opposite stories.

Consider a mid-range comparison over seven years for a driver covering 60 km daily in Chennai:

* Fuel cost uses a ₹101.06/litre start price (Actual Chennai pump price, March 29, 2026), 16–18 km/l real-world mileage (typical mid-range petrol car in the ₹20L segment), and a 6% annual fuel inflation compounded over 7 years.

The EV resale value of ₹12,00,000 is an estimate based on 2026 market trends. Unlike petrol cars, the actual value at year 7 will depend heavily on a Certified Battery State of Health (SOH) report, remaining battery warranty, and the rapid pace of motor technology.

These are not manufacturer estimates — they are calculated using the same TCO formula engine that powers this tool. Your result will differ based on your city’s taxes, vehicle choice, and driving pattern, which is exactly why this personalised calculator exists.

How to Use This EV TCO Calculator: A Complete Guide

The calculator has two input panels — one for your driving habits, one for each vehicle — and produces results instantly as you move the sliders. Here is what each input means and how to find the right number for your situation.

Driving Habits & Ownership Period

• Daily commute (km/day): Enter your average round-trip distance on a typical workday. The annual distance compounds every running cost — the higher your commute, the faster an EV pays off.
• Ownership period (years): How long you plan to keep the vehicle, from 1 to 20 years. Seven to ten years is realistic for most Indian car buyers and tends to show the full savings picture for EV owners.

Petrol Car Inputs

• Upfront price: Use the on-road price or the ex-showroom price you are comparing. For a fair comparison, use the same variant tier for both vehicles.
• Fuel price per litre: Enter your city’s current petrol pump price. Mumbai, Delhi, Chennai, and Bangalore typically differ by ₹3–₹8 per litre due to state taxes.
• Annual fuel inflation (%): India’s petrol price has risen at a compound annual rate of 6–8% over the past decade. The default is 6%. Change this based on your own expectation. At 8% inflation, ₹103/litre petrol becomes ₹148/litre by year 5 — a number that dramatically accelerates your EV break-even.
• Real-world mileage (km/L): Use the fuel economy you actually get in mixed driving, not the ARAI certified figure. Most petrol sedans achieve 70–80% of ARAI rating in real-world Indian traffic conditions.
• Annual insurance: Enter your most recent comprehensive insurance premium. A ₹15–₹20 lakh petrol car typically costs ₹16,000–₹25,000 per year in comprehensive cover; this reduces with NCB over time.
• Annual maintenance: Include service costs: oil change (every 5,000–10,000 km), filters, pads, and general servicing. For a mid-range sedan, spending around ₹12,000–₹22,000 per year.
• Estimated resale value: The amount of money you think the car will be worth when you sell it. Don’t use percentages; use real-money estimates from resale sites.

Electric Vehicle Inputs

• Upfront price: Use the ex-showroom or on-road price of the EV you want to compare.
• Government subsidy: Enter the total amount of government money that can be used to buy something, such as a central scheme, a state incentive, or OEM cashback. Check out the subsidies section below for the most up-to-date amounts.
• Battery capacity (kWh): Found in the vehicle spec sheet. Most Indian electric vehicles (EVs) have batteries that hold between 26 kWh (for entry-level models) and 79 kWh (for premium SUVs).
• Real-world range (km): Use the range that real owners have reported in Indian conditions, not the ARAI number. Most electric vehicles (EVs) can go 70–80% of their rated range in mixed city driving with the AC on.
• Electricity tariff (₹/kWh): Your home charging unit rate. This varies significantly by state and consumption slab — see the tariff table below. Enter your actual DISCOM rate, not a national average.
• Annual insurance: EV comprehensive insurance runs 8–15% higher than equivalent petrol cars, primarily due to battery replacement risk. Budget ₹20,000–₹35,000 for a mid-range EV.
• Annual maintenance: EVs have no engine oil, spark plugs, timing belt, or exhaust system. Typical annual cost covers tyre rotation, brake fluid, and periodic software updates: ₹3,000–₹6,000 per year.
• Estimated resale value: As battery warranties grow to 8 years and buyer confidence rises, resale values for popular EV models in India are going up. After five years, most OEM models keep about 50–55% of their value.

Understanding Your Results: Reading the Dashboard and Chart

Once you enter your details, the results panel shows nine key financial metrics, a year-by-year TCO comparison chart, and a break-even timeline. Here is how to read each output:

Government Subsidies and Incentives in India (2026) — What to Enter

The ‘Govt Subsidy’ for private cars is now primarily an indirect saving. In states like Tamil Nadu, you save 100% on Road Tax until 2027, which can reduce your upfront cost by over ₹2 lakh on premium models, even though there is no direct cash payout from the Centre.

State-Wise Home Electricity Tariff Guide for the EV Cost Calculator

Your electricity unit rate is the biggest variable most EV cost tools get wrong — they use a national average that may be 30–40% above or below your actual rate. The table below shows indicative domestic slab rates. Always verify your exact rate on your monthly electricity bill before entering it.

EV vs Petrol Maintenance Costs in India: The Numbers Behind the Inputs

Maintenance is the cost that most car buyers underestimate over a long ownership period — and one of the largest factors in EV savings that static calculators miss entirely. Here is a realistic cost breakdown for seven years of typical Indian ownership:

This is why the ‘Annual Maintenance’ input matters. A petrol owner typically spends ₹18,000/year on servicing, whereas an EV owner spends closer to ₹7,500/year (factoring in tyres and fluids). This difference generates a ₹73,500 savings gap over seven years—before any fuel cost is even considered.

Understanding the EV Break-Even Point: The Chart Explained

The break-even point is the moment when the cumulative total cost of the EV — including its higher purchase price — falls below the cumulative total cost of the equivalent petrol car. Before this point, you’re still “paying back” the upfront premium. After it, every kilometre driven generates net financial advantage.

What Moves the Break-Even Earlier

• Higher daily commute: The single most powerful factor. A 100 km/day commuter can break even 3–4 years earlier than a 20 km/day commuter buying identical vehicles.
• Higher petrol price: For every ₹10/litre increase in petrol price, the annual fuel saving grows by approximately ₹7,000–₹12,000 for a 50 km/day driver (varies by mileage).
• Higher fuel inflation rate: A 9% annual fuel inflation vs 5% can shift break-even by 12–18 months over a 7-year window.
• Lower electricity tariff: Delhi residents using the dedicated EV tariff of ₹4.50/kWh pay roughly 40% less for charging than someone in a high-tariff state at ₹7.50/kWh — a difference that directly reduces break-even time.
• Higher government subsidy: Every ₹1 lakh in subsidy reduces the upfront premium by ₹1 lakh, pulling break-even forward proportionally.

What Pushes the Break-Even Later

• Low daily distance: Under 20 km/day, the annual fuel saving may be insufficient to recover the premium within a 10-year ownership window for many vehicle pairs.
• Large upfront price gap: If the EV costs ₹8–10 lakh more than the petrol equivalent before subsidies, the savings take longer to recover.
• Public fast-charging dependency: At ₹18–₹25/kWh for public DC charging, the per-km cost is ₹2–₹4 — still cheaper than petrol but significantly worse than home charging. If you cannot charge at home or at your office, enter a blended tariff (e.g., 70% home rate + 30% public rate).

EV Resale Value in India 2026: How to Enter a Realistic Figure

Resale value is the variable that has historically worked against EVs in India and that many calculators handle poorly — either ignoring it or using a generic percentage. The 2026 picture is more nuanced and, for buyers of established OEM models, increasingly favorable.

EV resale values in India are still evolving and vary significantly by model, battery health, and whether the OEM warranty is transferable to the second owner. Always verify current listings on Cars24, Spinny, or OBV before entering a figure in the calculator.

For the most accurate resale estimate, check current listings for your specific EV model on major Indian used-car platforms — then enter that realistic market value in the calculator rather than a formulaic percentage.