Glossary

Sum Insured

The sum insured is the maximum monetary limit of the insurer's liability under a policy, representing the highest amount the insurer will pay in the event of a covered loss. In Indian commercial insurance, it is declared by the insured at policy inception and forms the basis for premium calculation and claim settlement.

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Last reviewed: April 2026

In plain English

Sum insured is the maximum amount your insurance company will pay if something goes wrong. If your sum insured is INR 5 crore and your loss is INR 7 crore, the insurer pays only INR 5 crore — you bear the rest. It is essential to set the sum insured accurately so you are neither under-insured nor paying extra premium for coverage you cannot use.

Detailed explanation

The sum insured is one of the most critical elements of any commercial insurance policy in India. It appears in the policy schedule and sets the ceiling on the insurer's obligation. Regardless of the actual loss suffered, the insurer's payout cannot exceed the sum insured. Selecting an appropriate sum insured is therefore a fundamental responsibility of the insured, typically guided by their IRDAI-licensed insurance broker.

In Indian property insurance — including the standard fire and special perils policy — the sum insured should reflect the total value of the assets being covered. This may be calculated on an indemnity basis (market value with depreciation) or on a reinstatement basis (new replacement cost without depreciation), depending on the policy terms. For stock and inventory, the sum insured should represent the maximum value of stock likely to be at risk at any point during the policy period, including raw materials, work-in-progress, and finished goods. For buildings and machinery, the sum insured should reflect either depreciated value or reinstatement cost, as applicable.

Under-insurance is a significant risk for Indian businesses. If the sum insured is less than the actual value of the property, the average clause (also known as the condition of average) applies. This clause reduces the claim payout in the same proportion as the under-insurance. For example, if a factory's assets are worth INR 10 crore but the sum insured is only INR 5 crore (50% under-insurance), a claim of INR 2 crore will be settled at only INR 1 crore. The average clause is standard in Indian fire and property policies and is strictly applied by IRDAI-licensed surveyors.

Over-insurance — declaring a sum insured higher than the actual asset value — does not benefit the insured. Under the principle of indemnity, the insurer pays only the actual loss, never more. Over-insurance merely results in unnecessarily higher premiums.

For Indian businesses with fluctuating asset values, such as those with seasonal inventory or commodity-linked stock, IRDAI guidelines permit declaration-based policies. Under this arrangement, the insured declares the value of stock at regular intervals (monthly or quarterly), and the premium is adjusted based on the average declared value. This mechanism helps businesses avoid both under-insurance and over-insurance for their inventory. In liability insurance, the sum insured is referred to as the limit of indemnity and represents the maximum the insurer will pay for all claims during the policy period.

Indian example

A logistics warehousing company in Chennai insures its warehouse and stock under a fire policy with a sum insured of INR 15 crore — INR 5 crore for the building and INR 10 crore for stock. During renewal, the broker recommends increasing the stock sum insured to INR 14 crore based on a fresh valuation and increased commodity prices, thereby avoiding the average clause in the event of a claim.

Frequently Asked Questions

How should Indian businesses determine the correct sum insured for their fire and property policy?
Indian businesses should engage a professional valuer or chartered engineer to conduct a thorough valuation of all insurable assets — buildings, plant and machinery, furniture and fixtures, and stock. For reinstatement value policies, the valuation should reflect current replacement costs including erection, installation, customs duty (for imported machinery), GST, and professional fees. For stock, the sum insured should represent the maximum value at risk at any single point during the policy year. IRDAI-licensed brokers typically assist in this exercise to ensure the sum insured is adequate and the average clause will not reduce a future claim.
What is the average clause and how does it affect Indian commercial insurance claims?
The average clause, standard in Indian fire and property insurance policies, penalises under-insurance proportionally. If the sum insured is less than the actual value of the property at the time of loss, every claim — even a partial loss — is reduced in the same ratio. For instance, if assets worth INR 20 crore are insured for only INR 10 crore, the insured is deemed to be their own insurer for 50% of the risk. A claim of INR 4 crore would be settled at only INR 2 crore. The average clause is rigorously applied by IRDAI-licensed surveyors during claim assessment, making accurate valuation essential for Indian businesses.

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