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| A cumulative bonus (CB) in health insurance is extra sum insured your insurer adds at renewal, usually for every claim-free year, without charging extra premium. It typically grows by a fixed percentage of the base sum insured each year (commonly between 10% and 100% per year, depending on the plan) up to a cap (commonly 50% to 500% of the base cover). Under the IRDAI Master Circular on Health Insurance Business dated 29 May 2024, a no-claim bonus can be offered either as an increase in sum insured or as a discount on renewal premium. Some plans reduce the bonus after a claim (clawback), while others add it every year regardless of claims. The bonus is lost if the policy lapses beyond the grace period, and it counts toward continuity when you port. Treat it as a buffer on top of adequate base cover, never as a replacement for it. |
The ₹5 lakh policy that thinks it is a ₹10 lakh policy
Picture Arjun, 31, sitting in a hospital billing queue in Pune. His renewal notice last year proudly said “Total cover: ₹8 lakh.” He bought ₹5 lakh. The other ₹3 lakh? A cumulative bonus he earned by simply not falling sick for three years.
The bill in his hand says ₹9.4 lakh.
Here is the uncomfortable part. Arjun never asked three questions: Does my bonus shrink if I claim? Is my room rent limit calculated on ₹5 lakh or ₹8 lakh? And what happens to that ₹3 lakh if I switch insurers? Most people don’t ask either, because a cumulative bonus feels like free money. It is free. It is just not always as solid as it looks on the renewal notice.
This guide unpacks exactly how a cumulative bonus works in India, what IRDAI rules say about it, how clawbacks are calculated, where the fine print bites, and how to make your bonus actually work for you. Grab a chai. We are doing the maths too.
What is a cumulative bonus in health insurance?
A cumulative bonus is an increase in your sum insured that your insurer adds at renewal, as a reward, without increasing your premium for that bonus.
Technically, it is a form of No Claim Bonus (NCB) in health insurance. IRDAI’s Master Circular on Health Insurance Business (29 May 2024) allows the no-claim benefit to be given in one of two ways:
- As a cumulative bonus: your sum insured grows (for example, ₹5 lakh becomes ₹5.5 lakh).
- As a premium discount: your renewal premium drops for a claim-free year.
In practice, the vast majority of retail health plans in India pay the reward as a cumulative bonus. Pure premium-discount versions exist but are rare.
In simple words: stay claim-free (or, in some plans, just keep renewing), and your cover quietly grows every year.
Cumulative bonus vs No Claim Bonus: are they the same?
Mostly, yes, with one important twist in usage:
| Point of difference | Health insurance (Cumulative Bonus) | Motor insurance (No Claim Bonus) |
|---|---|---|
| What you get | Higher sum insured | Discount on own-damage premium |
| Typical growth | A fixed % of base sum insured per year | Discount ladder of 20%, 25%, 35%, 45%, 50% |
| After a claim | Reduced, reset, or untouched (depends on plan type) | Usually resets to zero (unless an NCB protector add-on is taken) |
| Portable? | Counted for continuity when you port | Transferable to a new vehicle/insurer in the owner’s name |
| (If you own a car or bike, our Motor Club keeps your motor policy, PUC and challans in one spot, so your motor NCB doesn’t vanish because of a missed renewal. More on why that matters in our piece on the 3 secret benefits of having motor insurance.) |
Why does a cumulative bonus exist (and why should you care)?
Three reasons, one for you and two for the insurer:
- Inflation armour for you. Medical costs in India have been rising at roughly 12% to 14% a year, according to widely cited industry estimates. A ₹5 lakh cover bought today buys noticeably less treatment in five years. A bonus that grows your cover softens that erosion.
- Retention for the insurer. A bonus you lose on lapse is a strong reason to renew with the same insurer.
- Risk reward. Claim-linked bonuses reward low-claim customers, which is good business for insurers.
| Why it matters to you: per the IRDAI Annual Report 2024-25, health insurance premiums written by general and standalone health insurers reached about ₹1,17,505 crore, and health became the single largest non-life segment at about 41% of gross direct premium. Millions of policyholders are sitting on bonuses they don’t fully understand. |
Types of cumulative bonus in India
Not every bonus behaves the same. Before you celebrate that “₹10 lakh total cover”, figure out which of these four you have.
Type 1: Classic claim-linked bonus (with clawback)
- Grows only in claim-free years (for example, 10% of base SI per year, up to 100%).
- If you claim, the bonus is reduced, usually at the same rate at which it was earned, or reset to zero, depending on policy wording.
- Best for: young, healthy, low-claim buyers.
Type 2: Guaranteed or loyalty bonus (claim-proof)
- Added at every renewal, whether or not you claimed.
- Past bonus is not reduced by claims.
- Best for: families with frequent claims, senior citizens, anyone with a pre-existing disease (PED).
Type 3: Booster or super bonus add-on
- A paid add-on that accelerates the bonus (for example, a much higher percentage per year) or lifts the cap, sometimes to several times the base cover.
- Best for: people who want long-term cover growth and are fine paying a little extra now.
Type 4: Carry-forward of unused sum insured
- No fixed percentage. The unused part of your base sum insured is carried forward into a pool for future years, up to a limit.
- Grows fast in claim-free years, grows slowly (or not at all) when you claim.
| Not sure which type sits inside your policy? Drop your policy PDF into Know Your Policy, and it tells you, in plain English, which bonus you have, how fast it grows, where it caps, and what a claim does to it. No magnifying glass required. |
How does a cumulative bonus work? Case studies with real maths
All premiums and bonus rates below are hypothetical and used only to explain the mechanics. Your policy wording is the final word.
Case study 1: Claim-linked bonus with clawback
Profile: Riya, 30, Bengaluru. Base sum insured: ₹5,00,000. Bonus: 20% of base SI per claim-free year, capped at 100%. Clawback: bonus reduced at the same rate (20% of base) for a claim year.
| Policy year | Cover available that year | Claim? | Bonus change at next renewal | Cover next year |
|---|---|---|---|---|
| 1 | ₹5,00,000 | No | +₹1,00,000 | ₹6,00,000 |
| 2 | ₹6,00,000 | No | +₹1,00,000 | ₹7,00,000 |
| 3 | ₹7,00,000 | Yes, ₹1,20,000 | -₹1,00,000 (clawback) | ₹6,00,000 |
| 4 | ₹6,00,000 | No | +₹1,00,000 | ₹7,00,000 |
| 5 | ₹7,00,000 | No | +₹1,00,000 | ₹8,00,000 |
What to notice: Riya’s ₹1.2 lakh claim in Year 3 was fully paid (cover that year was ₹7 lakh). The cost of claiming was a ₹1 lakh drop in next year’s bonus, not a reset of everything. Some wording resets the bonus to zero instead, which would have taken her to ₹5 lakh in Year 4. That single clause is worth checking.
Case study 2: The big claim arrives early
Same policy. Riya is diagnosed in Year 2, and the bill is ₹9,00,000.
- Cover available in Year 2: ₹6,00,000 (₹5 lakh base + ₹1 lakh bonus)
- Insurer pays (assuming no co-pay, no sub-limits, no room-rent deductions): ₹6,00,000
- Riya pays out of pocket: ₹9,00,000 – ₹6,00,000 = ₹3,00,000
A restoration benefit usually does not help here, because most restoration features don’t refill the sum insured for the same illness in the same hospitalisation. (Check your wording; some plans differ.)
Lesson: a bonus that needs five claim-free years to double your cover is no help in Year 2. Base cover does the heavy lifting.
Case study 3: Guaranteed bonus in a family with frequent claims
Profile: The Sharma family floater, ₹5,00,000 base. Guaranteed bonus: 50% of base per renewal, capped at 100%.
| Year | Cover | Claims that year | Cover next year |
|---|---|---|---|
| 1 | ₹5,00,000 | ₹40,000 (child’s dengue) | ₹7,50,000 |
| 2 | ₹7,50,000 | ₹1,10,000 (parent’s cataract) | ₹10,00,000 |
| 3 | ₹10,00,000 | None | ₹10,00,000 (cap reached) |
In a floater, the bonus belongs to the whole policy, so any member’s claim affects it under claim-linked plans. With a guaranteed bonus, the Sharmas doubled their cover in two renewals despite two claims.
Case study 4: Is a ₹5 lakh base plus bonus as good as ₹10 lakh base?
| Situation | ₹5L base + bonus (claim-linked, 10% a year) | ₹10L base |
|---|---|---|
| Cover in Year 1 | ₹5,00,000 | ₹10,00,000 |
| Cover in Year 5, no claims | ₹9,00,000 | ₹10,00,000 (plus any bonus) |
| After one claim in Year 5 | Bonus reduced | Base untouched |
| Room rent / % sub-limits linked to | Often base SI only | Base SI (higher) |
| Survives SI reduction or porting as-is? | Not always | Yes (as base) |
Verdict: a higher base sum insured is sturdier. A bonus is the cherry, not the cake.
| Not sure what your base should be? The CoverRisk Calculator weighs your age, city, AQI, BMI, lifestyle, family history and PEDs to suggest a cover that fits you, not your neighbour. It takes about as long as a Maggi. |
The fine print: 8 cumulative bonus rules people miss
- The cap. Most plans cap bonus somewhere between 50% and 500% of base SI. Once reached, it stops growing.
- Clawback rate. “Reduced at the same rate” and “reset to zero” are very different. Find the exact line.
- Order of use. When you claim, many wordings use up the base sum insured before touching the bonus, and some specify the reverse. It changes what “remains” for the rest of the year. Verify in your policy.
- Sub-limits don’t always scale. Room rent caps, ICU caps, maternity limits, OPD limits and hospital-cash amounts are often pegged to base SI, not base plus bonus. Your ₹8 lakh total may still come with a room-rent limit worked out on ₹5 lakh. That can trigger proportionate deductions on the whole bill.
- Lapse kills it. IRDAI rules give a grace period for renewal (30 days for annual premium modes, and a shorter window for instalment modes), and coverage continues during the grace period under the 2024 Master Circular. Miss the grace period, and you usually lose the bonus and the waiting-period credit you built.
- Reducing the sum insured shrinks the bonus. Drop from ₹10 lakh to ₹5 lakh and the bonus is generally scaled down proportionately.
- Porting. IRDAI requires the new insurer to give continuity benefits to the extent of the previous sum insured plus cumulative bonus. In plain terms, your waiting-period credit is protected on that total. The new insurer’s own bonus structure, however, usually starts fresh. Ask how the new insurer will treat the accumulated amount before you port.
- Terms can change at renewal. Product revisions approved by the regulator can alter bonus terms. Read renewal documents instead of filing them under “later”.
| Want a quick verdict on whether your policy’s bonus and features pass muster? Run it through the Policy Health Check. It flags weak spots like co-pay, room rent limits, sub-limits, and restoration, the same clauses that decide whether your bonus is real money or decorative money. |
Cumulative bonus vs restoration vs super top-up: what each fixes
| Feature | What it does | Best at fixing |
|---|---|---|
| Cumulative bonus | Grows cover over years | Slow erosion from medical inflation |
| Restoration/recharge | Refills SI after it is used up in a year | Multiple claims in one year (usually different illnesses) |
| Super top-up | Adds a large cover above a deductible | One very large bill |
They complement each other. If you want big cover now at a low premium, read our quick look at super top-up health insurance.
When should cumulative bonus drive your buying decision?
- You are young and healthy: a claim-linked bonus with a fast growth rate is a nice kicker. Prioritise it only after base cover, no room rent limit, and no co-pay.
- You have a PED, parents above 60, or kids who visit the doctor often: prefer a guaranteed bonus. Clawbacks will eat a claim-linked bonus.
- You plan to port in 1 to 2 years: don’t pay extra for a booster. Its value mostly stays behind.
- You are under-insured today: buy higher base or a super top-up now. Don’t wait for the bonus to “grow into” adequacy.
| If you are choosing from scratch, our step-by-step guide on how to choose the best health insurance plan shows where bonus sits in the priority list. |
Where CoverSure fits in: making your bonus actually count
- Never lose a bonus to a missed date: add every policy to your Insurance Portfolio and get renewal nudges before the grace period starts to sweat. Insurance Renewal makes the renewal itself quick.
- Know what your bonus really covers: Know Your Policy decodes bonus type, cap, clawback and sub-limit linkage.
- At claim time: Insurance SOS helps you find network hospitals and emergency support, so your cover (bonus included) actually gets used cashless.
- Confused between a booster add-on and higher base cover? Book a call with our advisors. Unbiased, no hard sell, and yes, we will do the spreadsheet maths with you.
Your bonus has been growing quietly. Time it got some attention. Download the CoverSure app, drop in your policy, and see your real cover in under five minutes. Faster than finding last year’s renewal email, promise.
FAQs on cumulative bonus in health insurance
- Is cumulative bonus mandatory in health insurance? No. IRDAI allows insurers to offer the no-claim benefit as a bonus on sum insured or a premium discount; not every product must offer one. Check your policy’s benefit table.
- Do I pay extra premium for cumulative bonus? Not for the in-built bonus. Booster or super-bonus add-ons cost extra.
- Does cumulative bonus reduce after a claim? In claim-linked plans, yes: it is typically reduced at the rate at which it accrued, or reset, as per the wording. In guaranteed or loyalty plans, claims do not reduce it.
- Do I lose my cumulative bonus if I renew late? If you renew within the grace period, your continuity (and bonus) is generally retained. Beyond the grace period, the policy lapses and the bonus is usually lost.
- What happens to my cumulative bonus when I port my policy? IRDAI requires continuity benefits to the extent of the previous sum insured plus cumulative bonus. The new insurer’s own bonus scheme normally starts afresh. Confirm treatment with the new insurer in writing.
- Does cumulative bonus apply to room rent limits? Often not. Many policies calculate percentage-based room rent limits on the base sum insured. Verify in your policy wording.
- Is cumulative bonus better than a higher sum insured? No. A higher base sum insured is available from day one and isn’t reduced by claims. Treat bonus as an extra buffer.
- Hey Google, what is cumulative bonus in health insurance? (voice-ready answer) It’s the extra cover your health insurer adds every year, usually when you don’t claim, without raising your premium for it.
Wrapping up
A cumulative bonus is one of the few genuinely free things in insurance. But “free” and “guaranteed” are cousins, not twins. Know your bonus type, know your cap, know your clawback, and never let a lapse erase years of loyalty. Build strong base cover first, then let the bonus do its quiet compounding.
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