What is Sub-limit in health insurance?
A sub-limit is a cap on how much your policy pays for one specific treatment, expense or disease — such as cataract surgery or a knee replacement — sitting inside your overall sum insured. Even with a large cover, the insurer will not pay above the sub-limit for that item, and the balance becomes your out-of-pocket cost.
In plain English
It's a smaller ceiling inside your big cover that applies to one particular treatment. Your ₹10 lakh plan might still pay only ₹25,000 for cataract.
A quick example
Your sum insured is ₹10,00,000 but cataract surgery carries a ₹25,000 sub-limit. If the surgery costs ₹45,000, the insurer pays ₹25,000 and you pay the ₹20,000 balance — your large sum insured does not override the cap.
What IRDAI says
IRDAI requires insurers to clearly disclose all sub-limits and disease-wise caps in the policy document, but it does not set how low a sub-limit may be — so read the schedule carefully before buying.
Where to find it in your policy
Not sure where this sits in your own policy? CoverSure reads the full document and pulls up the exact clause for you.
See where to find Sub Limit in your policy →Related terms
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No. A sub-limit applies to a specific treatment regardless of your total cover — a ₹25,000 cataract cap stays ₹25,000 even on a ₹50 lakh plan unless the policy says otherwise.
Cataract surgery, knee and joint replacements, specific illnesses, room rent, ICU charges, ambulance, and modern treatments often carry sub-limits. Some plans also cap maternity. Always check the schedule.
A sub-limit caps the rupee payout for one treatment, while a co-payment is a percentage you pay on every approved claim. A single claim can be hit by both at once.
Reviewed by
Atul SharmaAVP, Founder’s Office at CoverSure · 7+ years in insurance (ex-Tata, Ditto, Cholamandalam)
