Buy the identical car in Ahmedabad and Bengaluru and the bills differ by lakhs: a top-spec Tata Nexon diesel is ₹16.14 lakh on-road in Ahmedabad but ₹17.98 lakh in Bengaluru — ₹1.84 lakh more. On a top XUV 7XO, the spread reaches ₹4.15 lakh. The reason is one line on the quote: state road tax.
The headline numbers
We computed full on-road prices (verified state road-tax slabs + insurance estimate + TCS + charges) for four popular cars across the 20 cities covered by our on-road price pages:
| Car (ex-showroom) | Cheapest city | Costliest city | Gap |
|---|---|---|---|
| Maruti Swift ZXi+ (petrol) (₹8.29L) | Ahmedabad ₹9.18L | Bengaluru ₹9.96L | ₹0.78L |
| Tata Nexon top diesel (₹14.52L) | Ahmedabad ₹16.14L | Bengaluru ₹17.98L | ₹1.84L |
| Hyundai Creta top petrol (₹20.06L) | Ahmedabad ₹22.19L | Kochi ₹25.40L | ₹3.21L |
| Mahindra XUV 7XO top diesel (₹25.94L) | Ahmedabad ₹28.68L | Kochi ₹32.83L | ₹4.15L |
Every car has the same cheapest city — anywhere in Gujarat, whose flat 6% road tax is the lowest major-state rate in India — and the costliest depends on price band: Bengaluru for mainstream cars, Kochi for premium ones.
Why Bengaluru is the costliest
Karnataka's headline slabs (13–18%) are among India's steepest, and the state also levies a 10% cess on the tax amount. Fold that in and the effective rate on a ₹10–20 lakh car is 18.7%, just past Tamil Nadu's and Telangana's 18%. Above ₹20 lakh, Kerala's 22% takes the crown. Slabs were re-verified against state gazettes and notifications in September 2026 — the full method is on our methodology page.
The full map: Tata Nexon (top diesel, ₹14.52 lakh ex-showroom)
| City | Road tax rate | On-road price |
|---|---|---|
| Ahmedabad (Gujarat) | 6% | ₹16.14L |
| Surat (Gujarat) | 6% | ₹16.14L |
| Gurugram (Haryana) | 8% | ₹16.43L |
| Chandigarh (Chandigarh)† | 8% | ₹16.43L |
| Patna (Bihar) | 10% | ₹16.72L |
| Lucknow (Uttar Pradesh) | 11% | ₹16.86L |
| Noida (Uttar Pradesh) | 11% | ₹16.86L |
| Jaipur (Rajasthan)† | 12% | ₹17.01L |
| Indore (Madhya Pradesh) | 12% | ₹17.01L |
| Bhopal (Madhya Pradesh) | 12% | ₹17.01L |
| Delhi (Delhi)† | 12.5% | ₹17.08L |
| Kolkata (West Bengal)† | 13% | ₹17.15L |
| Mumbai (Maharashtra) | 14% | ₹17.30L |
| Pune (Maharashtra) | 14% | ₹17.30L |
| Nagpur (Maharashtra) | 14% | ₹17.30L |
| Kochi (Kerala) | 15% | ₹17.44L |
| Hyderabad (Telangana) | 18% | ₹17.88L |
| Chennai (Tamil Nadu) | 18% | ₹17.88L |
| Coimbatore (Tamil Nadu) | 18% | ₹17.88L |
| Bengaluru (Karnataka) | 18.7% | ₹17.98L |
† Approximate, and being corrected: Chandigarh levies its tax on the pre-GST price, Rajasthan taxes by engine size plus a 12.5% surcharge, West Bengal charges a flat 10% with minimum amounts, and Delhi's commonly quoted 25% diesel surcharge does not appear in the Act's rate schedule.
The same ordering holds, with small shifts, for nearly any petrol or diesel car — check your own car and city on our on-road price pages.
The EV wrinkle: exemptions are quietly ending
Electric cars used to escape road tax almost everywhere. That era is closing state by state: Madhya Pradesh's waiver lapsed in March 2026, Karnataka now taxes EVs at an effective 5.5–11% including cess, and Kerala's Finance Act 2025 introduced 8–10% slabs on EVs above ₹15 lakh. Maharashtra, Tamil Nadu (until December 2027), Uttar Pradesh (until October 2027), Telangana (until December 2026) and Delhi (for EVs up to ₹30 lakh) still charge EVs nothing — which means the state-to-state gap on a premium EV is now wider than on many petrol cars. Our EV cost guide covers what this does to the ownership math.
What a buyer can actually do with this
You cannot (legally, practically) register in a cheaper state — residence rules and re-registration requirements close that door. What the numbers are actually for:
- Budgeting honestly: the advertised ex-showroom price is a fiction everywhere, but how much of a fiction depends on your state — from +10% in Gujarat to +19–25% in Bengaluru or Kochi once tax and insurance stack up.
- Checking your quote: road tax is computed by formula, so it is the one line on a dealer quote you can verify to the rupee. Our quote-decoding guide walks through every line.
- Cross-city comparisons: relocating soon, or family in another state? The difference can fund the next variant up.
Prices computed July 2026 using verified state tax slabs; insurance estimated at typical comprehensive rates; excludes dealer-level charges and offers. Figures are indicative — methodology and per-city breakups: carsahihai.com/methodology.