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NISM Series X-B · Chapter 1: Basics of Insurance

L1 · Foundation

Foundation — The two illustrations, why insurance exists, the seven requirements of an insurable risk, and the two fundamental principles

The merchant ships and king's employees examples that carry through the whole workbook, risk retention versus risk transfer, the seven requirements a risk must satisfy to be insurable, and the principles of utmost good faith and insurable interest.

24 min read · Worth 6% of the paper · Written from pages 17–38 of the official NISM workbook · Updated 18 September 2026

1.1 Two examples that run through the entire book

The workbook opens with two illustrations and warns that these examples will be referred to later in the study material to understand and illustrate the concepts of Insurance. Learn the numbers; they come back.

Example 1 — Merchant ships

The assumptions: 100 merchants sent one ship each month. The loss to the merchant in case a ship was lost was Rs 10,00,000. On an average, 2 ships were lost at sea every month.

The arithmetic:

  • Total loss suffered by all merchants together = Rs 10,00,000 × 2 ships = Rs 20,00,000
  • If all 100 merchants paid Rs 20,000 each into an insurance fund, it would collect 100 × Rs 20,000 = Rs 20,00,000
  • This fund would be paid to the 2 merchants whose ships were lost.

The concepts that emerge:

ConceptValue
Risk coveredShip lost at sea
Sum assuredRs 10,00,000
Premium amountRs 20,000

And what could go wrong — two things, each a preview of a later section:

(a) NOT ALL THE 100 MERCHANTS AGREE TO PAY THE PREMIUM — which is the law of large numbers problem.

(b) SOME MERCHANTS DO NOT WANT TO "WASTE" THEIR PREMIUMS IN CASE THEIR SHIP IS NOT LOST AND WANT TO GET THEIR PREMIUMS BACK IN THAT CASE — which is the investment cum insurance policy problem.

Example 2 — The king's employees

Ignoring interest calculations, the gross earnings of each employee is Rs 2 lakhs × 10 years = Rs 20,00,000.

It is estimated that TWO of the employees are likely to die during the year. So the loss of employee income during the year is Rs 20,00,000 × 2 = Rs 40,00,000.

The king's scheme: he contributes an additional RS 8,000 PER EMPLOYEE, totalling Rs 8,000 × 500 = Rs 40,00,000, into a separate insurance fund which would be paid to the family members of the employees who die during the year.

ConceptValue
Risk coveredLoss of income due to death
Sum assuredRs 20,00,000
Premium amountRs 8,000 per employee

1.2 The need for insurance

These assets may be PHYSICAL ASSETS, such as ships or buildings and machinery, or they may be HUMAN ASSETS, such as employees.

Assets are subject to the risk that THEIR ABILITY TO GENERATE BENEFITS COULD BE LOST OR REDUCED DUE TO UNFORESEEN OR UNEXPECTED EVENTS. THERE IS A FINANCIAL OR ECONOMIC CONSEQUENCE TO THE RISK, AND INSURANCE INDEMNIFIES OR PROTECTS AGAINST THESE CONSEQUENCES.

The workbook applies this to its own examples: the ability of the king's employees to generate income from occupation may be affected by ILLNESS, DISABILITIES AND DEATH. The merchant ships could be lost at sea due to STORMS, PIRACY, MUTINY, leading to loss.

And a sentence that matters:

Risk retention versus risk transfer

What makes an event insurable:

The workbook's illustration: the premium payable on a health policy for an individual whose parents have a history of ill-health that are considered genetic — such as ailment of heart, cancer or diabetes — MAY BE MUCH HIGHER than that for an individual coming from parents with no such history. This is because THE PROBABILITY THAT THE INSURANCE COMPANY WILL BE REQUIRED TO PAY MEDICAL EXPENSES IN THE FIRST CASE IS MUCH HIGHER.

In the absence of insurance, THE LOSS ARISING OUT OF THE EVENT HAS TO BE BORNE BY THE PERSON WHO WOULD HAVE OTHERWISE ENJOYED THE BENEFIT FROM THE ASSET.

1.2.1 The seven requirements of an insurable risk

a. Large number of exposure units

Why it matters: in the absence of a large number of people being exposed to the same risk, THE PREMIUM PAYABLE WOULD BE MUCH HIGHER AND IT WOULD BE UNVIABLE FOR THE INSURER AND THE INSURED. And further: if the pool of people likely to suffer the loss is large but the number of them willing to pay a premium is only a fraction, THEN ALSO THE INSURANCE PREMIUM WOULD BE LARGER for the people who are willing to pay.

The arithmetic, worked on the merchant ships:

And the adverse-selection point that follows: IT IS NOT SURE IF THE RISK OF 2 SHIPS BEING LOST WILL BE FROM THESE 40 MERCHANTS OR THE BALANCE 60 MERCHANTS WHO DID NOT PARTICIPATE IN THE INSURANCE POOL.

b. Insurable interest

In the merchant ship example, the merchants have an insurable interest in the ship.

c. Accidental and unintentional

That exception is heavily examined. Death is certain; its TIMING is not — and that is what makes life insurable.

d. Determinable and measurable

e. No prospect of gain or profit

The example: investing in the stock market may result in loss, but it may also result in gain, and as such this is a SPECULATIVE RISK and therefore NOT INSURABLE.

The workbook then states the principle behind this:

And the moral-hazard illustration: if it were possible to insure against not making a profit from selling goods in a shop, THERE WOULD BE VERY LITTLE INCENTIVE TO TRY TO SELL THE GOODS if the owner knew the insurance company would step in and pay up anyway.

f. Chance of loss must be calculable

Two words: FREQUENCY and SEVERITY. How often, and how badly.

g. Premium must be economically feasible

This closes the loop with 1.2. If the premium approaches the value of the loss, risk retention becomes the rational choice and there is no reason to buy.

1.3 The two fundamental principles

1.3.1 Utmost good faith — uberrimae fidei

The party that has less information — the insurer — therefore IMPOSES CERTAIN SCREENING PROCESSES before entering into the contract. MEDICAL TEST IS A TYPICAL SCREENING PROCESS. HOWEVER, MEDICAL TEST HAS ITS LIMITATIONS. IT DOES NOT REVEAL ALL AILMENTS OR THE FAMILY HISTORY. THEREFORE, THE INSURER AGREES TO ENTER INTO THE INSURANCE CONTRACT BASED ON UTMOST GOOD FAITH IN THE INSURED.

What must be disclosed:

The consequence:

What is "material":

And the practical conclusion:

That is the whole argument in one line: a suppressed fact buys a cheaper premium and an unpayable policy.

1.3.2 Insurable interest

Who has insurable interest — the examples the workbook gives, all examinable:

RelationshipInsurable interest?
A business owner in his own inventoryYES
A business owner in a COMPETITOR'S inventoryNO
Family members — DIRECT DEPENDENTS and relationships of BLOOD AND MARRIAGEYES, in each other
Other blood relationships — AUNTS AND UNCLES, COUSINS, NIECES, AND NEPHEWSNO, unless there is PROOF OF FINANCIAL DEPENDENCE
A LENDER in the borrowerYES, TO THE EXTENT OF THE AMOUNT OUTSTANDING
EMPLOYERS in their KEY EMPLOYEESYES

Note the two qualifications that carry the marks: aunts, uncles, cousins, nieces and nephews need PROOF OF FINANCIAL DEPENDENCE, and the lender's interest is limited TO THE EXTENT OF THE AMOUNT OUTSTANDING — not to the borrower's whole life.

Think of it like this

A hundred merchants and two lost ships

The whole idea of insurance fits in one month of 19th century shipping. Loss per ship Rs 10,00,000, two ships lost, total loss Rs 20,00,000. Split across 100 merchants that is Rs 20,000 each — and every merchant sleeps soundly. Sum assured Rs 10,00,000, premium Rs 20,000. Everything else in this chapter is a refinement of that arithmetic.

Forty merchants, and the premium more than doubles

If only 40 of the 100 merchants join, the premium jumps from Rs 20,000 to Rs 50,000 — the same Rs 20,00,000 of loss divided among fewer people. Worse, the workbook adds, it is not sure the two ships lost will be from these 40 or from the 60 who stayed out. That is why the first requirement of an insurable risk is a large number of exposure units.

The king who spent 4 per cent

Rs 8,000 per employee on a salary of Rs 2,00,000 is 4 per cent — and for that the king guarantees Rs 20,00,000 to the family of any employee who dies. Two deaths among 500 employees cost Rs 40,00,000; five hundred contributions of Rs 8,000 raise exactly that. The entire pool pays premium but the liability for the insurance company will be only to a few in a year.

Death is certain; Tuesday is not

Loss must be accidental, unintentional and uncertain — and yet life insurance exists. The workbook resolves it in one line: the only exception is life insurance, where the event being insured against, namely death, is certain. HOWEVER, THE TIME OF DEATH IS UNCERTAIN, WHICH MAKES IT INSURABLE.

The shopkeeper who insured his profits

Suppose you could insure against not making a profit in your shop. There would be very little incentive to try to sell the goods if the owner knew the insurance company would step in and pay up anyway. That is why insurable risk must be pure risk with only the possibility of full or partial loss, and why speculative risk — like investing in the stock market — is not insurable.

The medical test that cannot see everything

The insurer screens, but a medical test has its limitations — it does not reveal all ailments or the family history. So the contract rests on utmost good faith: the insured must disclose family history, medical history, smoking and drinking habits, and nature of profession. Suppress something and the insurer has the right to REJECT THE CLAIM ENTIRELY when it investigates later.

The cheapest premium you will ever regret

Hide the diabetes and the premium falls. Then comes the claim, the investigation, and the rejection. The workbook is blunt: the lower premium paid would be a COMPLETE WASTE and, more importantly, THE LOSS WILL NOT BE REIMBURSED. When in doubt, it is safer for the insured to reveal the information rather than suppress it.

The uncle you cannot insure

You may insure the life of your spouse, your child, your parent — direct dependents and relationships of blood and marriage have insurable interest in each other. But for aunts and uncles, cousins, nieces and nephews the insurable interest would NOT EXIST UNLESS THERE IS PROOF OF FINANCIAL DEPENDENCE. And a lender may insure the borrower, but only to the extent of the amount outstanding.

Key terms in this chapter

Asset protection need
The need to protect assets created from theft or destruction, met by products such as household insurance.
Bancassurance
The arrangement or partnership that exists when a bank becomes the corporate agent of an insurance company.
Beneficial nominee
Under Section 39(7) of the Insurance Act, 1938, inserted by the February 2015 amendment, a life insurance nominee who is the parent, spouse, children, or spouse and children is beneficially entitled to the proceeds and is not accountable to the legal heirs.
Cashless claim payment
An arrangement in indemnity insurance under which the insurer approves the claim on submission of the bill and pays the hospital or garage directly. Because the claim amount is unchanged, there is no impact on the premium.
Composite broker
An insurance broker who is both a direct broker and a reinsurance broker.
Composite insurance agent
An individual appointed as agent by two or more insurers, who may not act for more than one life insurer, one general insurer, one health insurer and one each of the mono-line insurers.
Compulsory deductible
A health insurance deductible either fixed by the insurer or expressed as a percentage of sum assured. Top-up and super top-up policies are designed with a fixed deductible, giving lower premiums than a basic plan of the same coverage.
Contribution
The right of one insurer to a proportionate share of the claim where the insured holds more than one policy covering the same risk. It applies only to indemnity policies, since the total claim cannot exceed the ascertained loss.
Co-pay
The proportion of the claim amount met by the insured person, used in car and health insurance. It makes the insured sensitive to the claim amount and lowers the premium; the higher the co-pay, the lower the premium.
Corporate agent (composite)
A corporate entity representing insurers, which can work with a maximum of three life insurers, three general insurance companies and three health insurance companies.
Deductible
The portion of the claim paid by the insured person, after which the claim becomes admissible. Indian car insurance has a compulsory deductible of Rs 1,000 for cars up to 1600 CC.
Defined benefit insurance
A plan under which a fixed sum of money, based on a pre-estimated amount of loss, is paid on the happening of a covered event, used where the exact loss is difficult to ascertain or too small to be worth ascertaining.
Direct broker
An insurance broker who represents the client, can charge a fee to clients or earn commission from insurers, works with multiple insurers in India, and may provide claims consultancy and risk management services.
E-Insurance policy
An insurance policy issued in electronic form and exempt from issuance in physical form, on which insurers may offer a discount on premiums.
Health insurance moratorium
A period of five continuous years of premium payment without breaks, after which no health insurance claim is contestable except for proven fraud and permanent exclusions. A fresh five years applies from the date of any enhancement of sum insured, for the enhanced limit.
Income protection need
The need to protect available income from an unexpected charge, met by products such as health insurance and motor insurance.
Income replacement need
The need arising from risk to the earning ability of an asset, including a person's life, met by life insurance, critical illness and accidental disability insurance, plant and machinery cover and annuities.
Indemnity insurance
A contract embodying a duty to make good any loss, damage or liability incurred by another. It requires determination of the actual loss suffered before a claim is paid.
Insurable interest
The requirement that the insured will face monetary and not merely emotional loss if the subject matter is lost, the interest being lawful. The test is that the insured is better off if the risk does not materialise and adversely affected if it does.
Insurance
A basic form of risk management that provides protection against the loss of the economic benefits that can be enjoyed from assets, whether physical assets such as ships or human assets such as employees.
Insurance agent
An individual appointed by an insurer for the purpose of soliciting or procuring insurance business, including the continuance, renewal or revival of policies. The agent represents the insurance company.
Insurance web aggregator
An insurance intermediary that maintains a website providing online price comparison and information on the products of different insurers and other related matters.
Large number of exposure units
The requirement that large groups of similar though not identical units face the same peril, so that the insurer operates a common pool in which only a few are expected to suffer loss in any one year.
No claim bonus
A benefit that can be used to reduce premiums in the following years, one of the levers for optimising the insurance premium.
Over-insurance
Insuring for more than necessary, which imposes unnecessary costs in the form of higher premiums.
Principle of Indemnity
The principle that insurance will restore the financial situation of the insured to where it was before the event that caused the loss or damage, and that the intent of insurance should not be to make a profit or gain.
Pure risk
Risk involving only the possibility of full or partial loss, with no prospect of gain or profit. Only pure risk is insurable; speculative risk such as stock market investment is not.
Reinsurance
The practice whereby insurance companies transfer portions of their risk to other parties or reinsurance firms, to reduce the likelihood of paying a large obligation from a single claim and to spread risk so that no single party is affected by a large claim.
Risk retention
Bearing the consequences of a loss oneself, being the person to whom the benefits of the asset accrue.
Risk transfer
Transferring the consequences of a loss to another. Insurance enables risk transfer from the insured to the insurer, which undertakes to indemnify the insured for the financial loss suffered in return for a premium.
Section 45 of the Insurance Act, 1938
The provision that no life insurance policy can be called into question three years from issue, commencement of risk or revival, whichever is later, after which a death claim cannot be denied on any ground. Within those three years a claim may be repudiated on grounds of fraud.
Subrogation
The insurer stepping into the shoes of the insured after paying the claim and taking all actions the insured could have taken, such as pursuing an at-fault driver. A policy without subrogation rights would be more expensive.
Suitability analysis in insurance
The IRDAI requirement that agents justify product suitability before selling, assessed from age, income, family status, life stage, goals, investment objectives and existing insurance. It may be skipped only on written consent that the policyholder consciously chose to bypass it.
Uberrimae fidei
Utmost good faith. Because the insured is better informed about himself than the insurer, the obligation is on the insured to disclose all relevant information truthfully; anything that can influence the insurer's risk perception is material.
Under-insurance
Insuring for less than the loss likely to be suffered, which means the beneficiary is retaining a portion of the risk with themselves.
Voluntary deductible
A health insurance deductible chosen by the insured based on affordability or expected medical expenses; choosing a higher deductible lowers the premium.

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Original explanatory writing based on the official NISM workbook for Series X-B, which is published and copyrighted by NISM. Check figures against the current edition at nism.ac.in.

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