Sub-limits in health insurance: what they cap and how to find yours

What is a sub-limit in health insurance?

A sub-limit is the most your policy will pay for a specific treatment, expense or benefit, even when most of your sum insured is unused. IRDAI’s Customer Information Sheet (CIS) format describes it as “a pre-defined limit” above which the insurer “will not pay any amount”. Once a claim reaches the sub-limit, you pay the rest.

Sub-limits are written in a few ways:

• A rupee amount, such as “up to ₹40,000 per eye”.
• A percentage of the sum insured, such as “up to 25% of sum insured”.
• The lower of the two, such as “25% of sum insured or ₹40,000, whichever is lower”.

Each one also has a unit: per claim, per hospitalisation, per eye or knee, or per policy year. The unit matters as much as the amount.

What are the common types of sub-limit?

Most sub-limits fall into a handful of groups. The examples below show typical wording patterns, not the terms of any particular policy.

Room rent limits work differently from other sub-limits, because going over them can also cut other charges. See room rent capping for those.

Example: how a cataract sub-limit works

Example. Your sum insured is ₹10 lakh and the wording caps cataract surgery at “25% of sum insured or ₹40,000, whichever is lower”. 25% of ₹10 lakh is ₹2,50,000, so the lower figure, ₹40,000, applies. You have both eyes done in the same policy year: the first bill is ₹65,000 and the second ₹60,000.

The ₹10 lakh sum insured makes no difference here. With a ₹1 lakh sum insured, the same clause would pay even less: 25% of ₹1 lakh is ₹25,000, which is lower than ₹40,000.

How do sub-limits work with room rent limits?

They stack, and you get the lower result. Insurers commonly work out the admissible amount first, after non-payable items and any proportionate deduction for a costlier room, and then cap it at the sub-limit. Any co-payment usually comes last. Your wording sets the order.

Example. A knee replacement has a sub-limit of ₹2,00,000 per knee, and you stay in a room above your room rent limit.

On Bill A the sub-limit decides the payout, and the room deduction makes no difference. On Bill B the admissible amount stays under the cap, so the room deduction comes out of your pocket.

What does “no sub-limit” mean?

It means the policy doesn’t cap named treatments or expenses separately: an admissible claim is paid up to the sum insured. It doesn’t mean the whole bill is paid. Room rent limits, co-payment, deductibles, waiting periods and non-payable items can still apply. Some brochures use “no sub-limits” for disease-wise caps only, so check the “Financial limits of coverage” row of your CIS.

Modern treatments, AYUSH and maternity

Modern treatments. IRDAI’s 2024 Master Circular says insurers “shall endeavour to cover” technological advancements and treatments. Its examples include uterine artery embolisation and HIFU, balloon sinuplasty, deep brain stimulation, oral chemotherapy, immunotherapy by injection, intravitreal injections, robotic surgery, stereotactic radiosurgery, bronchial thermoplasty, laser vaporisation of the prostate, intra-operative neuro monitoring and stem cell therapy for bone marrow transplant. IRDAI’s 2020 rules, superseded in 2024, said these “shall not be excluded” but allowed sub-limits on them. Many wordings still cap them, so search for “modern treatment”.

AYUSH. IRDAI’s 2024 Insurance Products Regulations require each insurer to have a Board-approved AYUSH policy, including its approach to placing AYUSH treatment at par with other treatments. That rule doesn’t set a minimum payout, and some policies still cap AYUSH claims.

Maternity. Where it is covered, maternity is often a fixed amount per delivery, available only after a waiting period. Check both the amount and the number of deliveries covered.

Where are sub-limits listed?

• Customer Information Sheet: the “Financial limits of coverage” row lists sub-limits, co-payment and deductibles, including room or ICU limits and named diseases.
• Policy schedule: plan-specific amounts, such as your room rent limit or maternity cover.
• Policy wording: the benefits section, a table of benefits, or an annexure listing procedure-wise limits.

IRDAI’s CIS format says that if the CIS and the policy document conflict, the policy document prevails. Treat the CIS as a summary and confirm each limit in the wording.

What to check in your policy

1. CIS: read every line under “Financial limits of coverage”.
2. Policy wording: search for “sub-limit”, “sub limit”, “limit per”, “whichever is lower”, “% of sum insured” and “up to Rs”.
3. Units: search for “per eye”, “per knee”, “per hospitalisation”, “per claim” and “per policy year”.
4. Named treatments: search for “cataract”, “joint replacement”, “modern treatment”, “AYUSH”, “ambulance” and “maternity”.
5. Tables and annexures: look for “Table of Benefits”, “Schedule of Benefits” or an annexure of procedure-wise limits.
6. Base for percentages: check whether a percentage applies to the base sum insured or includes any bonus.

Where people get caught out

• Assuming a big sum insured means a big payout. A ₹40,000 cataract cap stays ₹40,000 on a ₹10 lakh policy.
• Choosing a premium lens or implant that takes the bill well above the procedure’s cap.
• Missing the unit. “Per policy year” can leave the second eye or knee with nothing.
• Reading “no sub-limits” as “no limits”. Room rent, co-pay and non-payable items can still apply.
• Relying on the CIS alone. The policy wording prevails if the two differ.