Motor add-ons worth paying for: zero-dep, RTI, engine protect, tyre and consumables

The base motor policy is largely standardised. Add-ons are where the cover becomes specific to your car, your city and how you actually drive. They are also where most of the money is either saved or wasted, because several of them exist purely to buy back something the base policy excludes.

Zero depreciation: what you get back for a replaced part

On an ordinary claim, the insurer deducts depreciation on every part it replaces. Plastic and rubber components depreciate fastest - bumpers, mirror housings, lamp assemblies - and on a three-year-old car the deduction on plastics can approach half the part cost. Zero-depreciation cover removes that deduction, so you receive the full replacement cost less only the compulsory deductible.

It is most worthwhile on newer cars, on models with expensive body panels, and in dense cities where minor collisions are frequent. Insurers usually cap the number of zero-dep claims per policy year, so read that limit rather than assuming it is unlimited.

One detail decides whether you need other add-ons: zero-depreciation cover generally excludes tyres and batteries even when they are replaced after an accident. That single exclusion is the reason tyre cover exists as a separate product.

Return to Invoice: the gap between IDV and what you paid

If your car is stolen or written off as a total loss, the base policy pays the Insured Declared Value - the depreciated market value on the day of loss, not what you paid. Return to Invoice, usually shortened to RTI, pays the original invoice value instead, and typically covers registration charges and road tax as well.

In the first three years of ownership, the gap between invoice price and IDV commonly runs to between ₹1 lakh and ₹3 lakh. That gap is the whole case for RTI. Most insurers only offer it on vehicles up to three or five years old, so it is a young-car add-on by design.

Zero-dep protects you on the claims you will probably make. Return to Invoice protects you on the one you hope you never do.

Engine protect

The base policy covers damage caused by a covered peril. It does not generally cover engine damage that follows from water ingress or from oil leaking out after an undercarriage impact, because that damage is consequential rather than direct. Engine protect buys back exactly that, covering the engine, gearbox and transmission internals.

If you live anywhere that waterlogs during the monsoon, this is usually the highest-value add-on on the list, ahead of zero-dep.

Tyre cover

Tyre protection covers replacement or repair of tyres damaged by cuts, bulges, blowouts and sidewall damage, including in many cases damage that occurs without any accompanying accident. Because zero-dep specifically leaves tyres out, this is the only route to a tyre claim on most policies.

It makes sense for high-mileage highway drivers, for cars on low-profile tyres where a single replacement is expensive, and for anyone whose regular routes are in poor repair. Policies usually require the tyre to have a minimum remaining tread depth, so worn-out tyres are not claimable.

Consumables and the smaller add-ons

Consumables cover pays for engine oil, coolant, brake fluid, nuts, bolts, washers, filters and grease used during an accident repair. Individually these are small amounts. On a substantial repair they add up to a meaningful share of the bill, and they are excluded from the base policy as a matter of course.

Roadside assistance covers towing, jump-starts, flat-tyre help, emergency fuel and lockout support. Key replacement covers lost or damaged keys and, on modern cars with coded keys and immobilisers, this is no longer a trivial cost. NCB protection lets you make a defined number of claims without losing your accumulated no-claim bonus.

How to choose without over-buying

Work backwards from the losses you are actually exposed to. A new hatchback in a flood-prone metro wants engine protect, zero-dep and RTI. A five-year-old sedan doing long highway runs wants tyre cover, consumables and roadside assistance more than it wants RTI, which it may not even be eligible for.

Add-ons are also only purchasable at inception or renewal. There is no mid-term route to add one after a loss, which makes renewal the single point in the year where this decision is worth ten focused minutes.