Adverse selection

What is adverse selection?

Adverse selection, also called anti-selection, happens when the people most likely to claim are also the most eager to buy cover, and the insurer cannot fully tell them apart from everyone else. A person who has just been told they need surgery is far more motivated to buy health insurance than a healthy 25-year-old. If both are charged the same premium, claims rise above what the price allowed for.

The problem feeds on itself. When premiums go up to cover the higher claims, healthier customers drop out because the price no longer looks fair to them. The pool becomes riskier still, prices rise again, and the product can become unviable. This is sometimes called a death spiral.

Adverse selection concerns who buys insurance and on what information. Moral hazard is the separate problem of behaviour changing after the policy is bought.

How insurers manage adverse selection in India

Insurers rely on information, timing rules and pool design to keep the pool balanced. Several of these are set by IRDAI rules as of October 2026:

Each rule balances two goals. Waiting periods protect the pool against people buying cover only once they know they need treatment. Caps on those waiting periods and the moratorium protect honest, long-standing customers. IRDAI's Master Circular on Health Insurance Business, 2024 also requires insurers to offer products that cater to all ages and to people with existing medical conditions, which pushes insurers to price these risks rather than refuse them.

Example

A health insurer prices a ₹5 lakh family floater assuming that 8 in 100 families will claim each year. It launches a version with no waiting period for pre-existing conditions and no medical questions. Families who already expect hospital bills rush to buy it, and the claim rate reaches 15 in 100 within a year. The insurer must either raise the premium sharply, which drives away families with no expected claims, or add waiting periods and underwriting. The numbers here are illustrative, but the pattern is why open-ended "no questions asked" health cover is rare.

What adverse selection means for distribution

Distributors sit at the point where adverse selection either enters the book or is caught.

• Selling in a hurry to sick customers. A customer who wants cover "this week" before a known procedure is a classic signal. The honest answer is that the condition must be disclosed, waiting periods will apply, and the policy is worth having for the future, not for the procedure already planned.
• Disclosure protects the customer. A declared condition may bring a loading or a waiting period, but it keeps the claim safe. A hidden condition can lead to repudiation, as explained under utmost good faith.
• Portability and continuity. Under portability, credit for waiting periods already served carries over to the new insurer. Advisers should never suggest letting a policy lapse to "start fresh", since that resets waiting periods.
• Renewal timing. Customers who renew on time keep their continuity benefits. Missing the grace period can restart waiting periods, so renewal reminders are a service, not only a sales activity.
• Group schemes. Employer and affinity programmes reduce adverse selection because whole groups join together. That is why group products can offer features, such as day-one cover for pre-existing conditions, that retail products often cannot.
• Channel mix affects the pool. A channel that sells mainly to customers who approach it after a diagnosis will show poor loss ratios. Insurers watch claims experience by channel, and partners with a balanced book get better product access and terms.