Health insurance portability is one of the most valuable rights IRDAI has given Indian policyholders — and also one of the most incompletely executed. Most articles about portability focus correctly on preserving waiting period credits, which is the primary benefit. But the simultaneous question of what happens to your accumulated No-Claim Bonus — the sum insured enhancement that rewards claim-free years — is less frequently addressed, and the answer determines a significant portion of the financial value your policy carries into the transfer.
What the NCB in Health Insurance Actually Is
Unlike motor insurance where NCB is a premium discount, health insurance NCB — also called Cumulative Bonus — works differently. It increases your sum insured by a defined percentage for each claim-free year, rewarding policyholders who maintain health and avoid hospitalisation claims.
A typical structure gives you a 10% to 50% sum insured enhancement per claim-free year, up to a defined maximum — often 50% to 100% of the base sum insured. A policyholder with a ₹5 lakh base sum insured who has accumulated three claim-free years at 10% per year has an effective sum insured of ₹6.5 lakh. This enhanced coverage was earned through years of premium payment without claims — it has real financial value.
The question portability raises is: when you move to a new insurer, does this accumulated bonus transfer with you or are you reset to the base sum insured?
What IRDAI’s Portability Framework Says About NCB
IRDAI’s portability guidelines focus primarily on continuity of waiting periods — the credit for time already served under pre-existing disease and specific disease waiting periods transfers to the new insurer. The guidelines are less prescriptive about NCB portability, and practice varies across insurers.
The practical reality is that most insurers do not automatically port the NCB enhancement to the new policy at the same level. The new insurer typically offers to match the sum insured you were effectively covered for — including the NCB enhancement — by offering you a higher base sum insured, which then becomes the new policy’s base. Your premium at the new insurer is calculated on this higher effective sum insured.
This is structurally different from bringing the NCB accumulation mechanism itself — you don’t arrive at the new insurer with two or three years of bonus credit that continues building. You start fresh on NCB accumulation at the new insurer, but at a base sum insured that reflects your enhanced coverage from the previous policy.
How to Negotiate NCB Preservation During Portability
The 45-day pre-renewal window is your negotiating moment. When approaching the new insurer with a portability application, explicitly state your current effective sum insured including the accumulated NCB and request that this full amount be the base sum insured in the new policy rather than reverting to a lower starting coverage.
Some insurers will match this without premium loading. Others may offer the enhanced sum insured with a small loading. A few may offer only the original base sum insured — which effectively erases your accumulated bonus enhancement. The outcome depends on the insurer’s portability underwriting policy and their appetite for the business.
Comparing two or three insurers’ specific responses to this request — rather than accepting the first offer — is where the value of the comparison exercise lies. An insurer that agrees to carry forward your full effective sum insured without loading is providing a materially better porting deal than one that reverts you to base coverage.
The Combined Portability Checklist
Successful portability that preserves both waiting period credits and NCB value requires: applying at least 45 days before renewal, providing complete documentation of your policy history and claim record, explicitly communicating your accumulated NCB and requesting equivalent base sum insured in the new policy, getting the new insurer’s offer in writing before accepting, and ensuring the new policy commences without a single day’s gap from the previous policy’s expiry.
The 45-day rule is non-negotiable. Missing it and renewing with your existing insurer forfeits the porting option for that year — and another year of premium paid to a dissatisfying insurer follows.
When Staying Might Be Better Than Porting
The portability calculation occasionally favours staying. If you have accumulated significant NCB with your existing insurer — say 50% bonus adding ₹5 lakh to a ₹10 lakh base sum insured — and the new insurer offers only the ₹10 lakh base without accommodating the bonus, you’re accepting ₹5 lakh less effective coverage unless you purchase a higher sum insured at additional premium.
Factor the full effective coverage comparison — not just the premium comparison — into your porting decision. A policy that is ₹3,000 cheaper annually but gives you ₹5 lakh less effective coverage is not necessarily a better deal depending on your health profile and risk assessment.
Frequently Asked Questions (FAQs)
Q1. Does filing a claim in the final year before porting eliminate the accumulated NCB entirely?
A: A claim in any policy year resets the NCB accumulation — the enhancement built over previous claim-free years is typically reduced or eliminated upon the first claim, reverting the sum insured enhancement to the base. For portability purposes, you would port at the claim-adjusted effective sum insured, not at the pre-claim enhanced level. This is another reason many experienced policyholders carefully evaluate whether to claim small hospitalisations or self-fund them to preserve the NCB.
Q2. Is the NCB accumulated on a family floater policy portable if only one member is porting to an individual policy?
A: Partial porting — moving one member from a family floater to an individual policy — is permitted under IRDAI guidelines. The NCB allocation for the individual member porting out depends on the insurer’s policy. Most insurers calculate the individual’s portion of the NCB proportionally. This is a specific question worth clarifying with both the existing and new insurer before initiating partial portability.
Q3. If the new insurer offers to match my enhanced sum insured, do waiting periods apply to the incremental coverage?
A: If the new insurer accepts the full effective sum insured — including NCB enhancement — as the new base sum insured, waiting period credits should apply to the entire amount. If the new insurer structures it as the original base sum insured with portability credits plus a top-up for the NCB amount, the top-up portion may carry fresh waiting periods. Confirm this structure explicitly in writing before accepting the porting offer.
Q4. Can I accumulate NCB at the new insurer from Year 1 of the ported policy?
A: Yes. From the first claim-free year at the new insurer, NCB accumulation begins afresh under the new policy’s terms. Different insurers have different NCB structures — some offer 10% per year up to 50%, others offer higher percentages with different caps. Compare the NCB accumulation structure at the new insurer against your existing insurer as part of the overall comparison — a more generous NCB structure at the new insurer compounds favourably over subsequent claim-free years.
Q5. Does the timing of the NCB credit — whether the bonus is credited at renewal or mid-year — affect the porting process?
A: NCB is typically credited at policy renewal rather than on an ongoing basis. For portability purposes, the NCB position at the time of the previous policy’s renewal — which determines the effective sum insured for the current year — is the relevant figure to carry into the porting discussion. Ensure your most recent renewal certificate clearly states the current effective sum insured including accumulated NCB, as this document is your primary evidence when negotiating with the new insurer.
