No-Claim Bonus (NCB) Guide — Accumulation, Transfer, and the Claim-or-Not Decision

The no-claim bonus on a motor policy — universally written as 'NCB' — is one of the few features in Indian insurance that compounds in the policyholder's favour over time. Every year you renew without filing an own-damage claim, the discount on your next year's OD premium gets larger, capping at 50% after five consecutive claim-free years. For a vehicle owner who drives carefully and does not claim small repairs, the cumulative saving over a decade can run into tens of thousands of rupees — a meaningful share of the lifetime motor premium on a private car.

What is less widely understood is how NCB interacts with the day-to-day decisions every driver faces. Should you claim a ₹6,000 dent repair on a 4-year-old NCB stack, or pay it yourself? When you sell the car, can you carry the NCB to the next car, or does it stay with the vehicle? When you switch insurers at renewal, do you lose the NCB or transfer it? This article walks through the IRDAI NCB ladder, the transfer mechanics, the NCB protection add-on, and the claim-or-not break-even arithmetic that determines whether a small repair is worth filing.

Numbers cited are educational reference figures based on the IRDAI motor NCB grid. Your own renewal notice carries the contractual figures for your policy.

The IRDAI NCB Ladder

NCB is a percentage discount applied to the own-damage portion of a comprehensive motor premium at renewal, awarded for each consecutive claim-free policy year. The ladder is uniform across all Indian general insurers — IRDAI sets it under the standard motor tariff and the insurer cannot deviate.

• After 1 claim-free year — 20% discount on OD premium
• After 2 consecutive claim-free years — 25%
• After 3 consecutive claim-free years — 35%
• After 4 consecutive claim-free years — 45%
• After 5 or more consecutive claim-free years — 50% (caps here)

The ladder applies only to the OD portion of the premium. The third-party portion is set by IRDAI tariff and does not receive NCB — there is no incentive structure on the statutory liability cover, only on the market-priced own-damage cover. NCB also does not apply to add-on premiums (zero-dep, engine-protect, etc.) — those are computed separately and the NCB discount is applied only to the base OD figure.

What Resets the NCB

Filing any own-damage claim during the policy year resets the NCB to 0% at the next renewal. The size of the claim does not matter — a ₹4,000 dent claim and a ₹2 lakh accident claim both reset the bonus to zero. That single fact is the basis of the claim-or-not arithmetic discussed later in this article.

Third-party-only claims do not affect the OD NCB — because NCB is on the OD portion and a TP-only claim is on the third-party slice. A claim under a personal accident cover attached to the motor policy also typically does not reset NCB, though a few policies do — read the policy schedule for the exact contractual rule on each insurer.

NCB is Tied to the Policyholder, Not the Vehicle

A widely misunderstood feature of NCB is that it follows the policyholder, not the vehicle. When you sell a car and buy a new one, the accumulated NCB is transferable to the new vehicle's comprehensive policy — provided the new policy is in your name and the transfer happens within a defined window.

The mechanics are: cancel the OD section of the old policy or let it expire, request a 'NCB retention letter' from the outgoing insurer, present that letter to the new insurer when you take a comprehensive policy on the new vehicle. The letter is valid for 90 days from the date of expiry of the original policy. Beyond 90 days, the retention typically lapses and the new policy starts with 0% NCB.

This is also why the new buyer of a second-hand car does not inherit the seller's NCB. The seller takes the retention letter and uses it on their next vehicle; the buyer starts a fresh NCB clock on the second-hand car. If the buyer's name is added to the existing policy without the seller retaining the bonus, the NCB is recovered by the insurer at the next renewal.

Transferring NCB Between Insurers

When you switch insurers at renewal — a routine annual decision for many vehicle owners — the NCB transfers to the new insurer at the same percentage you held with the outgoing one. The new insurer typically requires the renewal notice or the previous policy schedule as evidence of the NCB band, and either contacts the outgoing insurer for confirmation or relies on the policyholder's declaration backed by documents.

Switching insurers is therefore not a reason to lose the bonus — the bonus is yours, not the insurer's. Where switching does cause confusion is in the timing: if you let the old policy lapse for more than 90 days before taking the new policy, NCB is forfeited regardless of which insurer the new policy is with. Renew or switch before the policy expires to preserve the ladder.

The NCB Protection Add-On

Some insurers offer an add-on called 'NCB protection' or 'NCB protector' — for an extra premium (typically 5-10% of the base OD premium), the insurer agrees to preserve your NCB band even if you file one or two own-damage claims during the year, up to a defined cap. The exact terms vary: a typical add-on might allow one claim per year and a maximum of two claims over the policy lifetime before the protection itself lapses.

The economics of the add-on depend on your driving and parking environment. If you drive in dense urban traffic and have a history of one or two minor claims a year, the add-on can preserve a 50% NCB band that would otherwise reset to 0%. For a careful driver with a low claim probability, the add-on premium is a recurring cost against an event that may never happen — the marginal return is lower.

How NCB Compounds — A Worked Example

Consider a private car with a base OD premium of ₹10,000 a year (the figure stays roughly stable as IDV depreciates and per-rupee rates rise mildly). Over five claim-free years, the NCB-driven savings on the OD premium play out as follows.

• Year 1 — base premium ₹10,000, no NCB yet, you pay the full ₹10,000
• Year 2 — 20% NCB applied, OD premium ₹8,000, saving ₹2,000
• Year 3 — 25% NCB applied, OD premium ₹7,500, saving ₹2,500
• Year 4 — 35% NCB applied, OD premium ₹6,500, saving ₹3,500
• Year 5 — 45% NCB applied, OD premium ₹5,500, saving ₹4,500
• Year 6 onwards — 50% NCB applied, OD premium ₹5,000, saving ₹5,000 a year as long as you remain claim-free

The cumulative saving over the first six years on this trajectory is around ₹17,500 — and ₹5,000 a year continues to compound for as long as the bonus is preserved. That stack is the financial reason the claim-or-not decision matters so much for small repairs.

The Claim-or-Not Break-Even

When a small repair happens — a dent, a scrape, a cracked bumper — the policyholder faces a choice. File the claim and let the insurer pay (less depreciation deductions and deductibles), or pay the workshop directly out of pocket and preserve the NCB band. The arithmetic is the same every time: file the claim only if the net payout exceeds the cost of the NCB you will lose over the next two policy years.

Concretely, suppose you have a 4-year NCB stack of 45% on a ₹10,000 base OD premium — you currently pay ₹5,500 in OD premium. Filing a claim resets the NCB to 0%, so next year you pay the full ₹10,000 (a hit of ₹4,500). The year after that, you only have a 20% NCB instead of the 50% you would otherwise have reached — a hit of about ₹3,000. Total NCB cost of filing the claim across two years: ₹7,500.

If the repair is ₹8,000 and the insurer pays ₹6,000 after depreciation deductions and a ₹500 deductible, the net claim benefit is ₹6,000 against ₹7,500 of forfeited NCB — paying out of pocket is the rational choice. If the repair is ₹50,000 and the insurer pays ₹38,000, the calculus flips heavily in favour of claiming. The break-even varies with the NCB band you currently hold, but for a 45-50% NCB band, claims under roughly ₹10,000-15,000 of net payout are usually better paid out of pocket.

NCB and Bundled Add-Ons

Some add-ons influence the claim-or-not decision in a non-obvious way. A 'zero depreciation' add-on raises the gross claim payout by waiving the part-by-part depreciation deductions, which makes more small claims worth filing. A 'consumables' add-on adds engine oil, nuts, bolts, and grease to the admissible items, again lifting the net payout. NCB protection, as discussed earlier, breaks the link between filing a claim and resetting the bonus.

The combined effect is that policyholders with high-add-on policies typically claim more often and benefit more from each claim — the policy is structurally designed to be used. Policyholders with lean policies (no zero-dep, no NCB protection) should approach small claims with the break-even arithmetic above and lean towards paying out of pocket.

Common Misconceptions

A common misconception is that NCB is automatically applied at renewal. It is — if you renew with the same insurer continuously and do not claim. It is not automatic if you switch insurers without producing the renewal notice or if you let the policy lapse beyond 90 days. A small administrative slip can erase a 50% bonus. Always carry the renewal notice or schedule when shopping a renewal.

A second misconception is that NCB is forfeited when you switch insurers. It is not — under IRDAI rules, NCB transfers to the new insurer at the same band, provided the renewal happens within the 90-day window and the documentation is complete. Switching insurers for a better OD premium or add-on bundle is fully compatible with preserving the NCB ladder.

A third misconception is that NCB is tied to the vehicle, so a buyer of a second-hand car gets the seller's NCB. The opposite is true. NCB belongs to the policyholder. The seller takes the retention letter to the next vehicle; the buyer starts fresh. If you are buying a second-hand car, do not pay a premium for the supposed accumulated NCB on the existing policy — it transfers out with the seller.

Practical Takeaways

1. Track your NCB band on every renewal notice — it is the single biggest discount on your OD premium and compounds over five years to 50%.
2. Renew before the policy expires; beyond 90 days, NCB lapses entirely.
3. When switching insurers, take the renewal notice and policy schedule from the outgoing insurer to the new one.
4. When selling the vehicle, request a NCB retention letter — it is your bonus, not the buyer's, and it is valid for 90 days on your next vehicle.
5. For small repairs (under ₹10,000-15,000 of net payout) on a 45-50% NCB band, run the break-even before claiming — paying out of pocket often preserves more value.
6. Consider the NCB protection add-on if you drive in heavy urban traffic and have a higher claim probability — it preserves the band across one or two annual claims for an extra premium.

NCB is the rare feature in Indian insurance where time itself rewards the policyholder. Five claim-free years build a 50% discount that survives renewals, survives insurer switches, and survives vehicle changes — as long as the paperwork is in order. The lever in the policyholder's hands is the claim-or-not decision on small repairs, and the rule of thumb is simple: never claim less than the cost of the NCB you would lose. Run the arithmetic at every claim event, and the ladder takes care of itself.