85Financial Planning HandbookPDP
Liability under policy =
Sum Insured under the policy
Total Sum Insured
Loss
Contribution
In some cases, more than one policy may be in force on the same subject matter at the time of loss. In
that circumstance, each insurer would need to bear a proportion of loss. This is referred to as Contribution.
Contribution is the right of the insurer to call upon others similarly (but not necessarily equally) liable to
the same insured to share the cost of an indemnity payment. If an insurer has paid the indemnity in full,
he can recover an equitable proportion from other insurers of the risk.
The following features are to be met before the condition of contribution arises:
Two or more policies of indemnity must exist;
The policies must cover the same interest;
The policies must cover a common peril which gives rise to the loss;
The policies must cover a common subject matter; and
Each policy must be liable for loss
It is not necessary for the policies to be identical to each other. There should, however, be an overlap in
such a manner that both policies are liable for payment of indemnity.
Basis of Contribution
Contribution is usually calculated on the basis of ‘Rateable Proportion’. This means that each insurer
contributes towards paying the loss in proportion to the sums insured on the policies.
The amounts payable by each insurer are calculated as per the following formula:
To illustrate: Let us assume that a businessman has insured his warehouse against the peril of fire with
three different insurers for Rs 5 Lakh, Rs 3 Lakh and Rs 2 Lakh. Suppose the warehouse is partly
destroyed due to fire and the amount of loss is assessed at Rs. 2,00,000. Then the amounts payable by
each insurer would be calculated as per the following formula:
Note
Even if the property is underinsured, the insured is considered to be his own insurer for the uninsured
amount. Thus, as per the concept of rateable proportion, the insured is supposed to contribute towards
bearing the loss with respect to the uninsured amount.
Insurer Sum Insured Amount Payable
Company A Rs. 5,00,000 (5,00,000 x 2,00,000)/10,00,000 = Rs. 1,00,000
Company B Rs. 3,00,000 (3,00,000 x 2,00,000)/10,00,000 = Rs. 60,000
Company C Rs. 2,00,000 (2,00,000 x 2,00,000)/10,00,000 = Rs. 40,000
Total Rs. 10,00,000 Rs. 2,00,000