What is Sum Insured in Health Insurance?
Sum insured is the maximum amount your health insurance company will pay toward covered medical expenses in a single policy year. If your sum insured is ₹10 lakh and you make a claim for ₹7 lakh, the insurer pays ₹7 lakh (subject to policy terms). If the treatment costs ₹13 lakh, you pay the extra ₹3 lakh out of pocket.
Choosing the right sum insured is arguably the single most important decision when buying health insurance — yet most Indians are significantly under-insured because they focus on keeping premiums low rather than getting adequate coverage.
The Medical Inflation Problem
Healthcare costs in India are rising at 12–14% annually — nearly double the general inflation rate. A procedure that costs ₹2 lakh today will cost ₹4–5 lakh in a decade. A policy bought in 2015 with ₹3 lakh sum insured provides less real protection today than it did at purchase. This is why experts recommend reviewing and increasing your sum insured every 3–5 years.
Average Cost of Common Treatments in India (2024)
| Treatment | Tier 2 City | Metro (Private Hospital) |
|---|---|---|
| Angioplasty | ₹2–3.5 lakh | ₹4–8 lakh |
| Knee Replacement | ₹2–3 lakh | ₹3–6 lakh |
| Bypass Surgery | ₹3–5 lakh | ₹5–10 lakh |
| Cancer Treatment (6 mo.) | ₹5–10 lakh | ₹10–25 lakh |
| ICU per day | ₹8,000–₹15,000 | ₹15,000–₹40,000 |
| Delivery (C-section) | ₹50,000–₹1 lakh | ₹1–2.5 lakh |
How Much Sum Insured Do You Actually Need?
A simple thumb rule used by financial planners:
- Minimum: ₹10 lakh per adult individual in 2024
- Recommended: ₹15–25 lakh for a family of four in a metro city
- Ideal base + top-up structure: ₹5–10 lakh base policy + ₹20–50 lakh super top-up
If you live in a metro and use private tertiary hospitals, you need a higher sum insured. A week-long ICU stay in a Mumbai or Delhi private hospital can easily cost ₹8–12 lakh before any surgical procedures are performed.
Factors That Affect How Much You Need
1. City Tier
Medical costs in metros like Mumbai, Delhi, Bengaluru and Hyderabad are 40–70% higher than Tier 2 and Tier 3 cities. Plan accordingly.
2. Age and Health Status
Older individuals and those with chronic conditions like diabetes or hypertension need higher coverage as their probability of expensive treatments is greater.
3. Family Size
For a family floater, the sum insured must account for the possibility of multiple claims in one year — even if this is statistically uncommon.
4. Existing Corporate Cover
If you have employer-provided group health insurance, it should supplement — not replace — a personal policy. Group covers typically end when you leave employment.
The Super Top-Up Strategy
The most cost-efficient approach to high sum insured is a base policy + super top-up combination. A super top-up pays claims above a defined threshold (deductible) in a year. For example:
- Base policy: ₹5 lakh (pays first ₹5 lakh of claims per year)
- Super top-up: ₹20 lakh with ₹5 lakh deductible (kicks in after ₹5 lakh)
This gives you ₹25 lakh effective coverage at a fraction of what a ₹25 lakh base policy would cost. Policies like HDFC Ergo My:health Suraksha and Niva Bupa ReAssure offer excellent super top-up options.
Restore Benefit: Effectively Doubling Your Sum Insured
Many modern plans include a restore benefit that automatically reinstates your used sum insured once in a policy year. This means if you exhaust your ₹10 lakh sum insured, it is automatically restored to ₹10 lakh for any future unrelated illness or injury that year. Plans with this feature offer excellent protection for families where multiple members might need hospitalization in the same year.
Final Guidance
Do not let the premium tail wag the coverage dog. The marginal cost of increasing from ₹5 lakh to ₹10 lakh sum insured is often just ₹2,000–₹4,000 per year — less than ₹350 per month. The potential out-of-pocket difference during a serious illness is in the lakhs. Choose your sum insured based on realistic treatment costs, not on how low you can keep the premium.