Imagine this. You fill out a health insurance proposal form. You answer every question honestly. You submit it. And then, a few days later, the insurer comes back saying your premium is higher than what was earlier quoted. Or your pre-existing diabetes has been excluded from coverage. Or worse, your application has been declined.
What just happened, behind the scenes, is called underwriting.
Most people never hear this word until something unexpected lands after filling the application. So if you have ever wondered why two people of similar age can get very different premiums for the same policy, or why your insurer asked for your medical records going back five years, this guide is for you.
Let us walk through what underwriting actually is, how it works, and what it means for you when you are buying health insurance in India.
What is Underwriting in Health Insurance?
Underwriting is the process by which an insurance company evaluates you as a risk before deciding whether to offer you a health insurance policy, on what terms, and at what price.
When you apply for a home loan, the bank checks your income, your CIBIL score, your existing liabilities. They are not doing this to be difficult. They are doing it because they want to know whether lending to you is financially sound. Underwriting in health insurance works on the same logic. The insurer needs to know how likely you are to make a claim, and for how much?
The team that does this evaluation is called the underwriting team. Their job is to assess the financial risk a new policyholder brings, and price the policy accordingly.
Underwriting is not a hostile process. Done fairly, underwriting protects both sides. It helps keep premiums sustainable for healthy policyholders while still allowing people with health conditions to access some form of coverage.
Why Does Underwriting Exist?
Health insurance works on a principle called risk pooling. Everyone pays premiums into a common pool. When someone falls ill and needs hospitalisation, the insurer pays from that pool.
For this system to remain financially sustainable, the insurer must maintain a reasonable balance between the premiums collected and the claims paid out. This balance is measured through the Incurred Claim Ratio (ICR).
If an insurer accepts high-risk individuals at standard premiums without any adjustment, they would end up paying out far more than they collect. That eventually drives premiums up for everyone, or worse, makes the insurer financially unstable.
Underwriting is the mechanism that prevents this. It is not about denying people coverage. It is about pricing coverage accurately based on the financial risk each person carries.
What Factors Do Insurers Check During Underwriting?
When your health insurance application comes in, the underwriting team reviews several factors.
| Factor | What They Review | Why It Matters |
| Medical History | Pre-existing conditions (diabetes, hypertension, thyroid, heart disease, cancer), prescription history, hospitalisation records, diagnostic reports, chronic medications | Most important factor; directly predicts claim likelihood and cost |
| Family Health History | Inherited conditions (heart disease, diabetes, certain cancers) | Signals long-term risk even if you’re currently healthy |
| Age | Your current age at application | Older applicants carry higher baseline medical risk |
| Lifestyle | BMI, tobacco/alcohol use, high-risk occupations/hobbies | Tobacco use especially flags broad health risks |
| Prescription History | All medications prescribed (past and present) | Reveals conditions even if not explicitly disclosed |
If you live with a condition like diabetes, our dedicated guide on health insurance for people with diabetes explains how underwriting looks at your profile.
Honesty here is non-negotiable. Any non-disclosure, whether intentional or not, can result in claim rejection later. The insurer has the right to deny claims if relevant health information was withheld at the time of application.
What Are the Possible Outcomes of Underwriting?
Once the underwriting team reviews your file, there are four standard outcomes.
| Outcome | Description | Example |
| Standard Acceptance | Accepted at quoted premium, no changes | Healthy 30-year-old applying for ₹10L sum insured |
| Acceptance with Loading | Accepted but at higher premium (+10-100%) | Controlled diabetes with +30% loading |
| Acceptance with Exclusions | Accepted but specific condition permanently excluded | History of heart disease → heart treatments excluded |
| Rejection | Application declined due to excessive risk | Multiple recent cardiac events with poor control |
1. Standard Acceptance
Your application is accepted at the quoted premium with no changes. This typically happens when you are young, relatively healthy, and have no significant pre-existing conditions.
2. Acceptance with Loading
Your application is accepted, but at a higher premium. This extra charge is called a loading and reflects the higher risk you carry. For example, if your base annual premium is ₹15,000 and the underwriter applies a 30% loading, your actual premium becomes ₹19,500.
As per IRDAI regulations, insurers are required to inform you of any loading in writing and get your explicit consent before policy issuance. You are not simply handed a higher bill without explanation.
3. Acceptance with Exclusions
The insurer may accept your application but exclude a specific condition permanently. This is becoming less common yet can happen for people with severe health conditions.
4. Rejection
In some cases, the risk profile is assessed as too high and the application is declined. This is more common for serious uncontrolled conditions. However, IRDAI has been actively working to make health insurance more inclusive. Different insurers also have different risk appetites, meaning a rejection from one insurer does not mean rejection from all.
If you’re unsure whether your application will be loaded or accepted, it’s better to check before applying. Our advisors can review your profile and help you understand the likely outcome upfront.
How Does Underwriting Work? The Step-by-Step Process
It helps to see underwriting not as a mysterious black box but as a structured process with distinct stages.
Stage 1: Product Design
Before you even apply, the underwriting team is involved in designing the health insurance product itself. They study the target customer profile, set the base premium, define what will be covered and excluded, and determine which add-ons the policy will offer. The standard retail premium you see on an insurer’s website is the outcome of this stage.
Stage 2: Your Application
When you apply for a policy, you fill out a proposal form. This form asks about your health conditions, lifestyle habits, medications, hospitalisation history, and family health. This form is the primary input for the underwriting review.
Stage 3: Medical Review
For many applications, especially those above a certain age or involving health disclosures, the underwriter will go further. They may request records from your doctor, review hospitalisation records, or ask you to undergo pre-policy medical tests. For some applications, there is a brief tele-underwriting call, where a medical professional speaks with you directly about your health disclosures.
Stage 4: Premium Calculation
Taking all inputs together, the underwriter calculates the appropriate premium. If loading is applicable, it is added at this stage. This calculation is guided by each insurer’s underwriting policy. IRDAI mandates every insurer to maintain a board-approved underwriting policy.
Stage 5: Final Decision
The underwriting team communicates the decision: standard acceptance, loading applied, exclusions imposed, or rejection. This decision is conveyed to you before the policy is issued, not after. If loading or exclusions apply, you must give your consent before the policy is activated.
What is Loading, and How Much Can The Insurer Charge?
Loading is an additional premium charged to policyholders whose health profile presents higher than standard risk.
The amount of loading is not prescribed by IRDAI. Each insurer determines loading based on their internal underwriting policy. In practice, loading often ranges from around 10% to as high as 100% of the base premium, depending on the nature and severity of the disclosed condition.
Some examples of conditions that may attract loading include controlled diabetes or hypertension, elevated BMI, a history of surgery, or respiratory conditions. The specific loading percentage depends on how well-controlled the condition is, how long ago it was diagnosed, and the overall health profile of the applicant.
If you have multiple conditions, the insurer typically applies a single consolidated loading based on your overall risk profile.
There is one important protection IRDAI has put in place. Claim-based loading is no longer permitted. An insurer cannot hike your premium at renewal solely because you filed a claim during the previous policy year. Premium revisions at renewal can only happen based on age or medical inflation at the aggregate portfolio level.
What IRDAI Says About Underwriting Fairness
IRDAI does not underwrite policies, but it sets the framework within which underwriting must happen. This framework includes several important consumer protections.
Insurers cannot discriminate on the basis of religion, caste, or race. Risk assessment must be based on legitimate health and lifestyle factors only.
If your application is loaded or rejected, the insurer must give you a clear reason in writing.
Any loading must be disclosed to you explicitly, and the policy can only be issued after you provide your consent.
IRDAI has removed the maximum entry age cap for health insurance. Insurers cannot turn away applicants solely on the basis of being a senior citizen, though underwriting norms and premiums may differ.
The moratorium period, after which an insurer cannot reject a claim due to non-disclosure unless fraud is proven, has been reduced from 8 years to 5 years. This is significant protection for long-term policyholders.
For a broader view of these IRDAI protections beyond underwriting, see our IRDAI health insurance rules guide.
What Happens If Your Health Insurance Application Is Rejected?
A rejection is not necessarily the end of the road.
First, ask the insurer for the reason in writing. You are entitled to this.
Second, explore whether another insurer might view your health profile differently. Underwriting criteria and guidelines vary across companies. Some insurers are more experienced in covering specific conditions than others. An advisor who understands different insurers’ underwriting preferences can be genuinely useful here.
Third, consider whether copayment or deductible options might make a policy viable. Some insurers may accept higher-risk profiles if the policyholder agrees to bear a portion of each claim.
Fourth, if the rejection was due to an incorrect or incomplete form, you can work with your advisor to reapply with accurate information.
How to Prepare for the Underwriting Process
The single most important thing you can do is be honest and thorough on your proposal form.
Disclose every health condition you are aware of. Disclose medications you are currently on or have recently taken. Disclose any hospitalisation in the last several years, even if it seems minor. If you had a condition five years ago that was resolved completely, mention it. The insurer can always assess that the risk is low. What they cannot do is assess a risk they were not told about.
Do not volunteer information about conditions that are genuinely not asked about. The form is structured and specific. Answer what is asked, completely and accurately.
If you are going through a tele-underwriting call, answer questions clearly and with as much detail as you know. Your clarity signals that you are a responsible applicant, which reflects well on your overall rik profile.
Read any endorsements or riders carefully before you sign. If a specific exclusion is being imposed, understand exactly what it covers and whether it is acceptable to you.
If you’d like someone to walk through your disclosures with you before you apply, you can always talk to an Algates Insurance advisor at no cost.
A Word on Disclosure and Claims
We see this pattern repeatedly in the insurance industry. Someone buys a health insurance policy without disclosing a condition, perhaps hoping to avoid higher premiums. They make their premium payments faithfully for years. And then, when they actually need to make a claim, it gets rejected because the insurer discovers the non-disclosed condition.
If you want to understand how non-disclosure shows up at the claim stage, read our guide on health insurance claim rejection.
This outcome is far worse than any loading would have been. You have paid premiums for years and received nothing when you needed it most.
The underwriting process exists precisely to avoid this. When both sides are honest, the policy terms reflect the actual risk. Claims go through cleanly. The system works as intended.
At Algates Insurance, when we help clients buy health insurance, we always guide them on accurate and complete disclosure. Not because we are cautious by nature, but because we have seen what happens when claims are rejected for non-disclosure. We would rather you pay a slightly higher premium with full coverage than a lower one that does not protect you when you actually need it.
The Bottom Line
Underwriting is not your adversary. It is the mechanism that makes health insurance financially viable for everyone. When it works fairly, it prices risk accurately, protects solvent insurers, and ensures that premiums stay reasonable for the broader pool of policyholders.
What you can control is how you engage with it. Be honest. Be thorough. Work with an advisor who understands underwriting norms across insurers, not just the one who quotes you the lowest premium on a comparison site.
If you have specific health conditions and are unsure how underwriting might affect your application, speak with one of our advisors. We understand how different insurers evaluate different health profiles, and we can help you approach the process in a way that gives you the best possible outcome.
Book a free call with an Algates Insurance advisor.
No sales pressure. No generic advice. Just an honest conversation about what will actually work for your situation.
Disclaimer: This article is for informational purposes only and does not constitute insurance advice. Underwriting guidelines are subject to change and may vary across insurers. Please consult an IRDAI-certified advisor before purchasing any insurance plan. Algates Consulting IMF Private Limited (Algates Insurance) is an insurance marketing firm with IRDAI IMF Registration Code: IMF187250600920210470.
Frequently Asked Questions
For straightforward applications with no health disclosures, underwriting can be completed in 24 to 48 hours. For applications involving pre-existing conditions or higher sum insured amounts that require medical tests, it typically takes 3 to 7 days. In complex cases involving multiple health conditions, the process may take up to a few weeks.
At renewal, if there is no change in sum insured, the insurer cannot conduct fresh underwriting or ask for a new medical examination. This is an important protection under IRDAI regulations. However, if you apply to increase your sum insured significantly, underwriting may apply to the incremental amount.
Not at all. The majority of applicants with controlled diabetes or hypertension are accepted, either at standard premiums or with a modest loading. The key factors are how well-controlled the condition is, how long it has been diagnosed, and the overall health picture. Different insurers also respond differently to the same condition.
Yes. If you already have a health policy and want to port it to a new insurer, IRDAI allows portability with continuity of waiting periods. The new insurer must give you credit for the waiting period you have already served on your existing policy. However, they can conduct fresh underwriting on the new application.
You can request a detailed explanation from the insurer. You can also choose not to accept the policy and explore alternatives.
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