Cumulative Bonus Booster

A cumulative bonus booster is an enhanced no-claim bonus structure on a health policy that adds a higher percentage to the sum insured each claim-free year than the standard 10%-per-year format, and often includes a 'protection' feature that prevents the bonus from collapsing on a claim. It is a product-design lever that Indian insurers use to differentiate their offerings, and the buyer's payoff is a meaningfully larger sum-insured ladder over five to ten claim-free years compared with a standard cumulative bonus policy. Common booster formats include 50% per claim-free year capped at 100%, 100% per claim-free year capped at 500%, and structures where the booster is paid as a separate sum-insured layer that does not erode on claim — only the original sum insured does.

The premium for a booster-equipped policy is typically slightly higher (5% to 15%) than a comparable standard-bonus policy. Worked example: Anjali holds a ₹10 lakh family floater with a 100%-per-year cumulative bonus booster, capped at 500% (₹50 lakh). Years 1 to 5 — claim-free, the booster ladder takes the renewal sum insured to ₹10 lakh + ₹50 lakh = ₹60 lakh by year 5.

Year 6 — the family files a ₹14 lakh claim. Under the booster's protection feature, the original ₹10 lakh sum insured continues to absorb the first ₹10 lakh, and the booster layer absorbs the remaining ₹4 lakh, leaving ₹46 lakh of booster intact for the rest of the year. At year 7 renewal, the booster sum re-accrues from the ₹46 lakh base, depending on the policy's specific reset rule.

A standard 10%-per-year cumulative bonus on the same base policy would have produced a sum insured of ₹15 lakh by year 5, which would have been completely consumed by the same ₹14 lakh claim. A common misconception is that 'cumulative bonus booster is the same as restoration benefit'. They address different scenarios.

The booster builds a larger sum insured at renewal as a reward for being claim-free; restoration refills the sum insured during the same policy year after a claim. Modern policies can carry both features, and the two complement each other. Another common misconception is that 'the booster amount is liquid cash if no claim ever arises'.

It is not — it is an additional layer of sum insured for hospitalisation, not a payable bonus or refund. The benefit materialises only when the family actually needs a high cover ceiling. Related: cumulative-bonus, restoration-benefit, family-floater.