Reviewed by Finin2min Editorial Desk · Last Reviewed 12 September 2026
Estimate a lump-sum critical-illness cover need from treatment, recovery income replacement, liabilities and existing resources.
2-minute answer
Critical illness insurance cover calculator for treatment cost, income replacement, liabilities and existing cover.
Current-law note: Reviewed on 12 September 2026. Check any later amendment, notification, circular, deadline or portal instruction before taking action.
How to use this page
Use the page as a decision tool: keep inputs on the same basis, make assumptions explicit and test a downside scenario before relying on the output.
Practical checklist
Use dated statements or contracts rather than rough estimates where possible.
Keep monthly/annual and pre-tax/post-tax units consistent.
Test at least one conservative scenario.
Record the assumption that most changes the result.
Reviewed: 12 September 2026. The applicable statute, rule, notification, order or official filing instruction prevails.
Cover assumptions
Total lump-sum need
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Additional cover gap
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Definitions, survival periods, exclusions and benefit triggers vary materially by policy.
How This Is Calculated
This calculator estimates critical illness cover need as: expected treatment cost, plus income replacement during recovery (monthly income × expected recovery months), plus any outstanding liabilities — minus existing resources (current critical illness cover and emergency reserves). The result is the additional lump-sum cover needed to fully absorb a critical illness diagnosis without financial strain.
Frequently Asked Questions
How is critical illness cover different from regular health insurance? ▼
Regular health insurance reimburses actual hospital bills. Critical illness cover pays a fixed lump sum on diagnosis of a covered condition (like cancer, heart attack, stroke), regardless of actual treatment cost — usable for treatment, income replacement during recovery, or paying off debts, giving more flexibility.
Why does the cover amount include income replacement, not just treatment cost? ▼
Because a serious illness often means an extended period unable to work, during which regular expenses and EMIs continue. Cover based only on treatment cost ignores this income gap, which is often the larger financial risk of a critical illness diagnosis.
Is critical illness cover a substitute for health insurance? ▼
No, they serve different purposes and work well together — health insurance covers actual hospitalization costs as they occur, while critical illness cover provides a lump sum for broader financial flexibility on diagnosis of a specific serious condition. Neither fully replaces the other.
Scope: Estimates the recommended critical illness insurance cover amount, based on estimated treatment cost for major illnesses, income-replacement during recovery, and existing health insurance/savings already available.
Calculation logic
Estimate treatment cost for major critical illnesses (e.g., cancer, cardiac conditions, major organ transplant, stroke) based on typical current treatment cost ranges the user enters or selects from illustrative ranges for their city/hospital tier.
Add an income-replacement buffer = Monthly expenses × Estimated recovery/non-working period (commonly several months to a year, adjustable), since a critical illness diagnosis often prevents the insured from working for an extended period even after treatment.
Subtract existing coverage already available (regular health insurance sum insured is generally inadequate alone for critical illness lump-sum needs, and is typically netted at a partial/nil offset unless the user has a dedicated critical-illness rider) and liquid savings earmarked for this purpose, to arrive at the recommended additional critical-illness cover.
Inputs and assumptions
Treatment cost estimates are illustrative planning ranges entered/selected by the user, not live/current hospital pricing data — actual treatment costs vary significantly by city, hospital and specific illness/stage.
Critical illness policies typically pay a lump sum on diagnosis of a covered illness (meeting the policy's specific severity/definition criteria), distinct from a regular health/mediclaim policy's expense-reimbursement structure — the calculator estimates the lump-sum need, not a reimbursement-style cover.
Exclusions and edge cases
This is a needs-estimation tool, not insurance advice — the specific list of covered illnesses, their definitions/severity criteria and waiting periods vary by insurer and policy, and must be checked in the specific policy wording before purchase.
Does not itself recommend a specific insurer or policy — the output is a cover-amount estimate to use when comparing critical illness plans.
Sources
No single official source applies — this is a needs-based planning estimate, not a statutory computation.
Review status: reviewed and approved by CA Nikhil Gupta on 18 July 2026.