Indian law mandates that every motorcycle and scooter on public roads must carry third-party liability insurance. This covers damage or injury you cause to other people, vehicles, or property in an accident where you are at fault. What it does not cover is any damage to your own bike — from accidents, theft, fire, or natural calamities. Comprehensive insurance adds an own-damage component on top of the mandatory third-party cover. This means your insurer pays for repairs to your bike when you are at fault in an accident, when your bike is stolen, when it is damaged by fire or flood, or when natural events (hailstorm, lightning, cyclone) damage it. The choice between third-party only and comprehensive is essentially the question: 'How much financial risk do I want to carry on my own bike?' Third-party insurance transfers risk to others-focused liability; comprehensive transfers that risk plus your own-asset risk to the insurer. Coverage Comparison: What Each Policy Covers Your bike damaged in accident (your fault) Your bike damaged by flood/natural disaster Personal accident cover (death/disability) *If the other party is at fault and identifiable, you can claim through their third-party insurance. If they flee the scene or are uninsured, you have no recourse under third-party only cover. The table makes clear why comprehensive insurance is recommended for any bike with significant value. A ₹1,50,000 bike protected only by third-party insurance means you bear the full ₹1,50,000 risk of theft or total damage accident. A ₹4,000 annual premium to transfer that risk is straightforward economics for most owners. Cost Comparison: Third Party vs Comprehensive Third-party insurance premiums are set by IRDAI (Insurance Regulatory and Development Authority of India) — they are non-negotiable and the same regardless of which insurer you choose for the same engine capacity: Most commuters: Activa, Splendor, FZ etc. Comprehensive insurance adds an own-damage premium calculated as a percentage of the bike's IDV (Insured Declared Value). For a ₹80,000 IDV bike, the own-damage premium is typically ₹1,500–₹3,500 depending on the insurer and add-ons. Compare policies at renewal — comprehensive premiums vary significantly between insurers for the same coverage. The own-damage component of comprehensive insurance is where NCB (No Claim Bonus) applies — not the third-party component. After 5 claim-free years, your 50% NCB discount applies only to the own-damage premium, not to the regulated third-party rate. Third-party only insurance is appropriate in limited circumstances. Being honest about when it genuinely makes sense prevents under-insurance on bikes that need more coverage: Very old, low-value bikes (under ₹15,000–₹20,000 market value): When the bike's market value is very low, the comprehensive premium may approach or exceed the bike's total value. For a ₹15,000 bike, paying ₹3,000 per year for comprehensive insurance means 20% of the bike's value in annual premium — the economics lean toward third-party only. Bikes used only within a gated community or very restricted area: For bikes used only within a housing complex or rarely on public roads, the risk of street accident is minimal. Even here, theft risk argues for comprehensive. Riders who are extremely conservative financially and prefer self-insuring: Some riders consciously choose to self-insure small risks. This is a legitimate financial choice but requires having the cash available to repair or replace the bike without insurance payout. For the vast majority of Mumbai riders commuting on bikes worth ₹30,000 or more, comprehensive insurance is strongly recommended. The own-damage premium at ₹1,500–₹4,000 per year is a small price relative to the covered risk. New bikes: Any new bike should have comprehensive insurance from day one. The risk of depreciation loss from an early accident is significant, and new bikes attract theft. Bikes under finance (loan): Banks require comprehensive insurance for all financed vehicles. A bank that finances your bike needs assurance that the collateral (the bike) is insured against damage and theft. Mumbai monsoon riding: Mumbai's annual flooding creates specific risks — bikes submerged in flood water suffer severe electrical and engine damage. Engine protection add-on within comprehensive policies covers flood damage. Premium motorcycles (above ₹80,000): A high-value bike unprotected by own-damage cover is a significant unmanaged financial risk. The premium is larger but so is the covered value. Bikes parked on the street: Outdoor parking significantly raises theft risk. In areas with documented high theft rates, comprehensive with zero-depreciation becomes particularly cost-effective. Transferring Insurance When Buying or Selling a Used Bike When you buy a used bike, the existing insurance policy can be transferred to your name. This is not always the best choice — if the policy is near expiry or the coverage type does not match your needs, purchasing a new policy may be better. If the seller has a comprehensive policy with accumulated NCB, the NCB does not transfer to you — it belongs to the seller, who takes it to their next vehicle. You start your own NCB journey from zero on your new policy. If the seller has third-party only insurance and you want comprehensive coverage, you must purchase a new comprehensive policy. You cannot add own-damage cover to an existing third-party policy; you must buy a new complete comprehensive policy. BikeBro handles the insurance transfer documentation as part of its RC transfer service. For every bike purchased through BikeBro, the insurance transfer is coordinated so that the buyer has valid coverage from the day of purchase. Is own-damage insurance mandatory in India for bikes? No — only third-party liability insurance is mandatory under the Motor Vehicles Act. Own-damage (comprehensive) insurance is optional. However, for financed vehicles, lenders require comprehensive insurance as a loan condition. What is the difference between comprehensive and zero-depreciation insurance? Comprehensive insurance pays for repairs after applying depreciation to parts. Zero-depreciation (nil dep) is an add-on to comprehensive insurance that removes the depreciation deduction — you receive the full replacement value of parts without age-based reduction. It costs ₹300–₹1,500 extra per year and is very worthwhile for bikes under 5 years old. Can I add third-party insurance to my existing own-damage policy? Yes. If you have a standalone own-damage policy, you can add third-party cover as a separate policy or switch to a bundled comprehensive policy. In practice, most riders buy a single comprehensive policy from one insurer rather than managing two separate policies. What happens if I ride without insurance in Mumbai? Riding without valid insurance (even third-party) is illegal in India and carries a fine of ₹2,000 for the first offence and ₹4,000 for subsequent offences under the Motor Vehicles Act 2019. More importantly, you bear all financial liability for any damage or injury you cause. Does comprehensive insurance cover theft if I forget to lock my bike? Most comprehensive policies cover theft regardless of whether the bike was locked. However, failing to take reasonable security precautions (like leaving keys in the ignition) may give the insurer grounds to contest the claim. Always lock your bike and use additional security devices.