1.2 Insurable Interest, Indemnity, and Other Insurance Principles
Key Takeaways
- Insurable interest means the insured would suffer a genuine financial loss if the property is damaged; in P&C it must exist at the time of loss, not necessarily at policy inception.
- Indemnity restores the insured to the same financial position as before the loss - no profit, no betterment.
- Actual Cash Value (ACV) = Replacement Cost minus Depreciation; Replacement Cost coverage pays to rebuild with no depreciation deduction.
- Coinsurance penalizes underinsured property: Recovery = (Carried / Required) x Loss, capped at the limit, less the deductible.
- Subrogation lets the insurer recover its payment from a negligent third party; the insured cannot collect twice.
Insurable Interest
Insurable interest exists when a person would suffer a genuine financial loss if covered property were damaged or destroyed. Without it, a contract is a wager (speculative) and unenforceable.
Timing rule - memorize the difference:
- Property/Casualty insurance - insurable interest must exist at the time of loss. You can buy auto insurance on a car you are about to sell; coverage simply will not respond after you no longer own it.
- Life insurance - insurable interest need only exist at policy inception.
Sources of insurable interest in property include ownership, a secured creditor's (mortgagee's) interest, a bailee holding others' property, and contractual rights such as a lease.
The Principle of Indemnity
Indemnity restores the insured to the same financial condition that existed immediately before the loss - no better, no worse. An insured should never profit from a loss. Several doctrines enforce this:
- Subrogation - after paying a claim, the insurer steps into the insured's shoes to recover from a negligent third party. Prevents double recovery.
- Contribution (Other Insurance) - when two policies cover the same loss, each pays its pro-rata share; the insured cannot collect the full amount twice.
- Salvage - the insurer takes title to damaged property it has paid for in full and may sell it to offset the loss.
Exceptions that pay more than strict indemnity: valued policies (agreed fixed amount, common for fine art) and replacement cost coverage (no depreciation deducted).
ACV vs. Replacement Cost
The loss-settlement basis decides how much the insured actually receives.
| Basis | Formula / Result |
|---|---|
| Replacement Cost (RC) | Cost to repair/replace with like kind and quality, no depreciation deducted |
| Actual Cash Value (ACV) | RC minus depreciation (also reachable via the broad evidence rule or fair market value) |
Worked ACV Example
A roof costs $20,000 to replace new. It has a 20-year life and is 12 years old, so depreciation = 12/20 = 60%.
- Depreciation = 0.60 x $20,000 = $12,000
- ACV = $20,000 - $12,000 = $8,000
Under ACV the insured collects $8,000 (less any deductible); under RC coverage the insured collects the full $20,000 (most RC forms pay ACV first, then the depreciation holdback once repairs are completed).
A 12-year-old roof with a 20-year useful life costs $20,000 to replace. Under an Actual Cash Value settlement with a $500 deductible, how much does the insured receive?
Coinsurance
Property policies (notably ISO commercial property form CP 00 10) contain a coinsurance clause, commonly 80%, 90%, or 100%, requiring the insured to carry a limit equal to that percentage of the property's replacement value. Underinsure and the insurer pays only a proportionate share of a partial loss.
Formula: Recovery = (Limit Carried / Limit Required) x Loss - Deductible (capped at the policy limit).
Worked Coinsurance Example
Building value = $1,000,000; coinsurance = 80%, so required limit = $800,000. The owner carries only $600,000. A $200,000 fire loss occurs with a $1,000 deductible.
- Coinsurance factor = $600,000 / $800,000 = 0.75
- 0.75 x $200,000 = $150,000
- Less deductible: $150,000 - $1,000 = $149,000 paid
The $50,000 (plus deductible) shortfall is the coinsurance penalty the insured absorbs for being underinsured. Trap: coinsurance applies to partial losses; a total loss up to the limit is paid in full subject to the limit.
Other Insurance: Pro-Rata Contribution
When two or more policies cover the same property on the same basis, the Other Insurance / pro-rata condition prevents the insured from collecting more than the loss. Each insurer pays in proportion to its share of the total coverage.
Worked Pro-Rata Example
A warehouse carries $400,000 with Insurer A and $600,000 with Insurer B - $1,000,000 total. A $300,000 covered loss occurs.
- Insurer A pays 400,000 / 1,000,000 = 40% x $300,000 = $120,000
- Insurer B pays 600,000 / 1,000,000 = 60% x $300,000 = $180,000
The insured collects exactly $300,000 - never $600,000 - preserving indemnity. Trap: pro-rata sharing applies only while each policy is otherwise valid; primary/excess clauses can override straight pro-rata.
Stated Amount, Agreed Value, and the Limit
Several related concepts decide the ceiling on recovery and how indemnity is honored:
- Limit of Insurance - the maximum the insurer will pay; recovery is the lesser of the loss, the limit, or (for partial losses) the coinsurance-adjusted figure.
- Agreed Value - the insurer and insured agree on a value up front and the coinsurance penalty is suspended for the term, useful when valuation is hard.
Two more bases override strict ACV math:
- Stated Amount - a figure the insured declares (common on specialized equipment); the insurer pays the lesser of the stated amount or ACV.
- Valued Policy - pays a fixed agreed sum on a total loss regardless of actual value, an exception to strict indemnity (some states mandate valued-policy laws for total fire losses to buildings).
Knowing which basis applies is how the exam separates a full recovery from a penalized one.
A building worth $500,000 carries an 80% coinsurance clause. The owner insures it for $300,000 and suffers a $100,000 partial loss (ignore the deductible). How much will the insurer pay?
Timing of Insurable Interest and the Subrogation Link
In property insurance, insurable interest must exist at the time of loss (it may be acquired after the policy is bought); in life insurance it must exist only at inception. This timing distinction is a favorite exam item. Indemnity is reinforced by subrogation (the insurer recovers from the at-fault party after paying) and the other-insurance/pro-rata clauses, all of which prevent the insured from collecting more than the actual loss. A buyer who sells the insured building before a fire has no insurable interest at the time of loss and cannot collect, illustrating why interest is measured at the loss, not at purchase.