Most new-car buyers in India spend weeks deciding between the base, middle and top variant of a car, and almost all of that time goes on the price list. What rarely comes up in the showroom is that the same choice also fixes a large part of what you will pay for motor insurance in every year after you drive out.
Here is how that works, with real numbers.
Insurance has two parts, and only one depends on the variant
A comprehensive car policy is made of two pieces.
Third-party cover is compulsory, and its premium is fixed by the regulator according to engine size, not price. For a new private car with an engine between 1,000 cc and 1,500 cc, the three-year third-party premium is ₹10,640 at every insurer. A base variant and a top variant with the same engine pay exactly the same amount.
Own-damage cover pays for damage to your own car, for theft and for total loss. Its premium is worked out as a percentage of the car’s Insured Declared Value, or IDV. The rate differs from one insurer to another and falls as you build up a no-claim bonus, but whatever the rate, it is applied to the IDV. A bigger IDV means a bigger own-damage premium, every year.
How the IDV is set
For a new car, the IDV is the manufacturer’s listed ex-showroom price less a fixed depreciation that depends on the car’s age:
| Age of the car | Depreciation |
| Up to 6 months | 5% |
| 6 months
to 1 year |
15% |
| 1 to 2 years | 20% |
| 2 to 3 years | 30% |
| 3 to 4 years | 40% |
| 4 to 5 years | 50% |
Registration charges and the insurance itself are not part of the IDV. After five years the IDV is agreed between you and the insurer.
So the ex-showroom price is the starting point of every own-damage premium you will pay for five years, and the ex-showroom price is exactly what changes when you move up the variants.
A worked example: the Maruti Swift
The Swift’s 1.2 petrol manual range runs from the LXi at ₹5,83,900 to the ZXi+ at ₹8,28,900 (Delhi ex-showroom, October 2026). Same engine, same gearbox, ₹2,45,000 apart: the ZXi+ costs 42% more.
In the first year the LXi’s IDV is ₹5,54,705 and the ZXi+’s is ₹7,87,455, a gap of ₹2,32,750. That gap shrinks as both cars depreciate, but it never closes:
| Policy year (depreciation) | IDV gap (ZXi+ over LXi) | Extra premium per 1% of IDV |
| Year 1, new car (5%) | ₹2,32,750 | ₹2,328 |
| Year 2 (20%) | ₹1,96,000 | ₹1,960 |
| Year 3 (30%) | ₹1,71,500 | ₹1,715 |
| Year 4 (40%) | ₹1,47,000 | ₹1,470 |
| Year 5 (50%) | ₹1,22,500 | ₹1,225 |
| Five years | ₹8,698 |
Insurers quote different own-damage rates, and discounts and the no-claim bonus change them, so the last column shows the extra premium for every 1% of IDV your insurer charges. If your quote works out at 2% of IDV, double it: about ₹17,400 more over five years for the ZXi+, before 18% GST. The third-party premium does not move at all.
Add-ons such as zero depreciation and return to invoice are generally priced against the IDV as well, so they grow with the variant in the same way.
A higher IDV is not only a cost
The same IDV is what the insurer pays if the car is stolen or written off, so the dearer variant is also insured for more. And equipment that comes fitted from the factory is already inside the ex-showroom price, which means it is covered within the IDV without you doing anything.
That is not true of accessories added later. If you buy a lower variant and fit alloy wheels, a touchscreen or a reversing camera at the dealer or in the aftermarket, they must be declared to your insurer and added to the cover, usually for an extra premium. If they are not declared, a claim for them can be refused.
The question to ask in the showroom
A higher variant therefore costs you more three times: in its price, in road tax (which most states charge as a share of the price), and in insurance every year. It is worth paying for only if the equipment it adds is worth the money to you.
That is the question CarMaths was built to answer. It puts a rupee value on each feature that differs between two variants and compares the total with the price difference. On the Swift, the step from LXi to ZXi+ adds equipment valued at about ₹1,57,700 against a ₹2,45,000 price difference, which covers roughly 64% of it. Across 84 car models, the top variant typically costs about 35% more than the base on the same engine and gearbox, so the Swift is far from an unusual case.
Before you sign the dealer’s insurance quote
1. Check the IDV. For a new car it should be the ex-showroom price less 5%. A lower IDV makes the premium look cheaper, but it also lowers what you are paid after a theft or total loss.
2. Compare the own-damage premium, not just the total. The third-party part is the same everywhere, so the own-damage part is where quotes really differ.
3. Get at least one quote from outside the dealership. You are free to choose your own insurer; the dealer’s policy is not compulsory.
4. Declare every accessory that was not fitted at the factory.
5. Look at the full on-road price before you settle on a variant. Insurance, road tax and registration all rise with the ex-showroom price. An on-road price calculator that breaks the total down line by line for your state shows how much of the gap between two variants comes from these charges rather than from the car itself.
Choosing a variant is usually treated as a one-time spending decision. For your insurance it is a five-year one, so it is worth doing the sums before you sign.
Rupesh Kumar is the founder of CarMaths, which works out the rupee value of car variants for Indian buyers.
