Why Doesn't NCB in Insurance Apply to a Third-Party-Only Policy?
The logic behind NCB in insurance is that it rewards policyholders who do not make claims for damage to their own vehicle.
The Own Damage (OD) section of your car insurance policy covers repair or replacement of your vehicle, and insurers will give a discount to drivers who are at a lower claims risk. Third-party liability premiums are different. These premiums are regulated by IRDAI and are meant to compensate third parties for injury, death or property damage arising from the use of insured vehicles.
Because the premium is determined by regulatory guidelines rather than an individual driver's claims history, a no-claim bonus cannot be applied to this portion of the policy.
Interesting Fact
Third-party premiums for private cars are reviewed and re-notified by IRDAI every financial year and are uniform across every city and state in India. A car owner in Mumbai and one in a small town in Bihar pay the exact same third-party premium for an identical engine capacity, no claim bonus or driving record notwithstanding.
How Is NCB Calculated on a Comprehensive Car Insurance Policy?
NCB is applied only to the OD premium, before add-on costs like zero depreciation or engine protection are added back in. Here's a simple example:
Suppose your OD premium is ₹15,000 and your third-party premium is ₹3,400. After three consecutive claim-free years, your NCB slab is 35%. Your OD premium drops to ₹9,750, while your third-party premium of ₹3,400 stays exactly the same, since it is fixed by IRDAI and unrelated to your no-claim bonus. Reviewing your comprehensive car insurance policy each year helps you track this properly.
Pro Tip
A small claim can cost more than it saves. Filing a claim for minor damage resets your NCB to zero, and rebuilding it from 20% back to 50% takes another five claim-free years. Before filing a low-value claim, compare the repair cost against the NCB discount you stand to lose over the next renewal cycles; it is often cheaper to pay out of pocket and keep your slab intact.
How Do You Protect or Transfer Your No Claim Bonus?
● Keep your policy active. Renew before expiry, or at least within 90 days of it, since a lapse beyond this window wipes your NCB to zero.
● Avoid filing claims for minor, low-value damage that costs less to repair out of pocket than the NCB you would lose.
● Request your NCB certificate from your current insurer when switching providers, selling your car, or buying a new one; it is valid for three years.
● Remember that the NCB belongs to you. Therefore, it moves with you to a new car or a new insurer, but never to the person who buys your old car.
● Consider an NCB protection add-on if you hold a high slab (35% and above), so that one or two claims in a year don't reset your discount to zero.
● Buy or renew your car insurance online through your insurer's portal or app, where your existing NCB is usually auto-verified and applied at checkout.
Read More: What Happens to NCB After Delayed Renewal
Expert Note
This information is based on standard motor insurance guidelines issued by the Insurance Regulatory and Development Authority of India (IRDAI) and commonly followed industry practices. Policy coverage and conditions may vary by insurer.
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