What is no claim bonus in health insurance and how is it calculated?

No claim bonus (NCB) in health insurance is a renewal-year reward for each claim-free policy year. Insurers most commonly offer it as an increase in your sum insured (called cumulative bonus), and less often as a discount on your renewal premium, subject to caps and conditions set out in your policy wording.

What no claim bonus means in health insurance

No claim bonus is a renewal benefit offered to policyholders who do not file any claim during the policy year. It is not a one-time upfront feature you get when buying the policy; it accrues over time as a reward for staying claim-free, and it is applied when you renew.

IRDAI's product regulations allow health insurers to offer "cumulative bonus" or "no claim bonus" as an optional benefit. Under these rules, the bonus can be structured as an increase in sum insured, a discount on renewal premium, or a combination of both, depending on how the product is designed.

In practice, policy wordings and brochures describe it in consistent language: the bonus may increase the sum insured or reduce the renewal premium for the next policy year, up to a specified maximum. The benefit is applied at the time of renewal and is subject to two conditions - a claim-free year and continuous coverage without a break.

The core idea is simple: if you don't claim, you're rewarded. For most Indian health plans, that reward shows up as a larger sum insured at the same base premium.

How no claim bonus is calculated or offered by insurers

The calculation follows a straightforward, repeatable process at each renewal. Insurers first check whether the expiring policy year was claim-free. If it was, they apply the NCB on renewal. If a claim was made, they reduce or reset the accumulated bonus according to the policy's rules.

When the bonus is applied, it is calculated as either a percentage of, or a fixed amount linked to, your base sum insured (or your premium, for discount-type NCB).

For cumulative bonus (sum insured increase):

• A fixed percentage of the base sum insured - commonly cited ranges run from 10% to 50% per claim-free year - is added to your cover.
• Some products instead add a fixed rupee amount, such as ₹50,000 to ₹1,00,000 per year, to the sum insured.

For premium-discount NCB:

• A percentage discount on the renewal premium per claim-free year, commonly around 5%–10% in health products.
• The discount may step up each year up to a defined maximum.

Crucially, the timing matters. The bonus is credited at renewal after each completed claim-free policy year - not mid-year. So if you complete a full year without claiming and renew on time, the bonus is added to your cover for the upcoming year. To keep earning it, you must complete each year claim-free and renew without a break.

Which structure is most common?

In Indian health insurance, the cumulative bonus (sum insured increase) is the standard and more common form of NCB. Premium-discount NCB is far more prominent in motor insurance; in health, the dominant construction is a sum insured enhancement. Some products offer a combination - a higher sum insured plus a small renewal discount - but these are less common.

Types of no claim bonus and common policy structures

Indian health insurers broadly use three NCB structures, and understanding the difference helps you read a policy correctly.

1. Increase in sum insured (cumulative bonus). The most common form. Every claim-free year, your sum insured rises by a percentage or fixed amount without any extra premium, until it hits a cap.

2. Premium discount on renewal. A discount on your renewal premium for each claim-free year. Less common in health, more typical in motor.

3. Combination (dual benefit). Some products offer both a higher sum insured and a small renewal discount.

Typical percentages, step-ups, and caps

While exact figures vary by product, current industry ranges are fairly consistent:

Is no claim bonus the same as cumulative bonus?

Often, yes - but with a nuance. Many health policy wordings literally say "No Claim Bonus (also known as Cumulative Bonus)" when the benefit is a sum insured increase. In that context, the terms are used interchangeably.

Technically, though, "cumulative bonus" specifically refers to additional sum insured accrued for claim-free years, while "no claim bonus" is the broader umbrella term that can also include premium-discount-type rewards. The cleanest way to think about it: cumulative bonus is a subtype of no claim bonus - the sum-insured-based version.

Examples of no claim bonus in a health insurance policy

A worked example makes the mechanics clear. Assume a moderate, common set of parameters:

• Base sum insured: ₹5,00,000
• NCB type: cumulative bonus (sum insured increase)
• Bonus rate: 20% of base SI per claim-free year
• Cap: 100% of base SI
• Premium: unchanged by the bonus in this example (any change would be due to age or other factors, not NCB)

Here's how it builds up:

After five claim-free years, your ₹5 lakh policy effectively becomes ₹10 lakh of cover - at the same base premium in this illustration - purely from accumulated bonus. Once you hit the 100% cap (an extra ₹5 lakh on the original ₹5 lakh base), the bonus stops growing.

What can affect, reduce, or reset the bonus

A claim is the single biggest factor that can shrink your bonus, but the rules are not identical across all products.

How claims affect the bonus

As a broad principle, if you make a claim during the policy year, the accumulated NCB may be reduced or reset to zero in the next policy year, and you start building it again. This is how many traditional policies work.

It is not, however, a universal rule. Some modern products are designed with graded reductions, where only a portion of the bonus is lost, or with NCB-protector benefits that allow a claim without a full reset. Whether certain low-value events - such as OPD claims or minor claims - are excluded from the reset depends entirely on the individual product wording. There is no blanket regulatory rule that any specific claim type is always ignored, so you must check the policy wording, prospectus, or customer information sheet for your plan.

Grace periods and renewal timing

Health policies typically allow a grace period - often 15 to 30 days - for renewal. Paying within this window generally preserves your NCB and other continuity benefits, because the policy is treated as a continuous contract. Note that coverage for claims occurring during the grace period is usually not available.

If you let the policy lapse beyond the allowed grace period, it is treated as fresh cover, and your accumulated bonus is generally forfeited. Renewing on time is therefore essential to protect everything you've built up.

Mid-term endorsements

Changes such as adding family members, increasing the base sum insured, or switching plan type are governed by product-specific endorsement rules. NCB is usually calculated on the original base sum insured (not on the base-plus-bonus amount), and how it applies after a mid-term change is defined by the policy wording rather than any standard formula.

Individual versus floater policies

NCB applies to both individual and family floater plans, but the mechanics differ. On an individual policy, the bonus accrues to that person's cover. On a family floater, the bonus accrues to the shared family sum insured - which also means a claim by any covered member can affect the accumulated bonus for the whole floater, unless the product states otherwise.

How to compare policies that offer no claim bonus

When you evaluate two plans, the headline sum insured tells only part of the story. The NCB design can make a meaningful difference to your long-term cover. Compare these dimensions:

• Type of benefit. Cumulative bonus (SI increase), premium discount, or a combination - and which suits your needs.
• Rate of accumulation. The percentage or rupee amount added per claim-free year. A higher rate builds cover faster.
• Maximum cap. How much total bonus you can accumulate - 50%, 100%, or more of base SI, or the maximum discount on premium.
• Impact of claims. Does a single claim fully reset the bonus, or is there a graded reduction or an NCB-protector feature?
• Scope. How the benefit works on individual versus floater plans, and how a member's claim affects a shared floater bonus.
• Portability treatment. How the accumulated cover is recognised if you move to a new insurer.
• Disclosure clarity. Whether the policy clearly states the rate, cap, reset rules, and renewal and portability treatment.

For employers building group health programmes, these mechanics matter at scale, since bonus design and renewal terms shape the value employees receive year on year. Platforms like Plum help HR and people teams structure, manage, and explain employee health benefits - including how cover and renewal terms work - so employees actually understand and use what they're given.

Can no claim bonus be carried forward when switching insurers?

Under IRDAI portability rules, when you shift from one insurer to another, the new insurer must grant continuity benefits up to the level of your existing cover - that is, your sum insured plus accumulated bonus from the old policy, subject to underwriting and applicable timelines.

In practice, the enhanced cover (base SI plus earned cumulative bonus) is treated as the continuity amount. The new insurer may treat part of that as your new base sum insured and then apply its own NCB schedule going forward. So while the higher cover is portable, the exact bonus structure - the percentage and cap - is not guaranteed to be identical with the new insurer.

To port smoothly, you typically need to submit your previous policy schedules showing base SI and bonus, renewal notices or premium receipts, and your claims history, as requested by the new insurer.

If you're planning group cover for your team and want guidance on structuring benefits and renewals, Talk To Sales.

FAQs about no claim bonus

What is no claim bonus in health insurance?

No claim bonus is a renewal-year reward given to policyholders who complete a policy year without filing a claim. In Indian health insurance it is most commonly delivered as a cumulative bonus - an increase in your sum insured at no extra base premium - though some products offer a renewal premium discount instead.

How is no claim bonus calculated by insurers?

At renewal, the insurer checks whether the expiring year was claim-free. If it was, it adds the bonus - typically a percentage of your base sum insured (often 10%–20%, with broad ranges up to 50%) or a fixed rupee amount - up to a maximum cap. The bonus is credited at renewal, not during the policy year.

Does making a claim reduce or reset the bonus?

In many traditional policies, a claim reduces or resets the accumulated bonus, and you start building it again from the next year. However, this is not universal - some products offer graded reductions or NCB-protector features that limit or prevent a full reset. Always check your specific policy wording.

Is no claim bonus the same as cumulative bonus?

They are often used interchangeably in health insurance, especially when the benefit is a sum insured increase. Technically, cumulative bonus refers specifically to additional sum insured, while no claim bonus is the broader term that can also cover premium discounts. In short, cumulative bonus is a subtype of no claim bonus.

Can no claim bonus be transferred when switching insurers?

The continuity of cover up to your sum insured plus accumulated bonus is portable under IRDAI portability rules, subject to underwriting. The new insurer typically recognises that enhanced cover and then applies its own NCB schedule going forward, so the exact bonus structure may not carry over identically.

Do all health insurance policies offer no claim bonus?

No claim bonus is an optional benefit that insurers may offer under IRDAI product norms, so it is common but not present in every plan. It applies to both individual and family floater policies, with different mechanics - on a floater, the bonus is shared and a member's claim can affect the whole family's accumulated bonus. Check the policy wording to confirm the rate, cap, and reset rules before buying.