1.2 Insurable Interest, Indemnity, and Other Insurance Principles

Insurable Interest

An insurable interest exists when a person would suffer a genuine financial loss if the covered property were damaged or destroyed. Without it, a contract is a wager and unenforceable. The exam draws a sharp timing distinction:

• Property & Casualty: insurable interest must exist at the time of loss (you can insure a car you no longer own, but you collect nothing if it's not yours when it burns).
• Life insurance: insurable interest need exist only at policy inception.

Sources of insurable interest include ownership, a mortgagee's lien, a lessee's bailment duty, and contractual liability. A landlord, tenant, and lender can each hold a separate interest in the same building.

The Principle of Indemnity

Indemnity is the bedrock of P&C: the insured should be restored to approximately the same financial position held before the loss — no better, no worse. It prevents profiting from a loss and curbs moral hazard.

Valuation methods flow from indemnity:

• Actual Cash Value (ACV) = Replacement Cost − Depreciation. The standard property measure.
• Replacement Cost (RC) pays to repair/replace with like kind and quality, no deduction for depreciation (subject to coinsurance and limits).
• Agreed value / valued policy pays a stated sum, common for fine art and in valued-policy states for total fire losses.
• Functional replacement / market value appear in special situations.

Worked ACV: a 10-year-old roof costs $20,000 to replace and has a 20-year life. Depreciation = 50% = $10,000, so ACV = $10,000.

Principles That Enforce Indemnity

Several doctrines exist to keep insureds from collecting more than their loss:

Subrogation trap: if the insured releases the negligent party before the insurer pays, the insurer may deny or reduce payment because its subrogation right was destroyed.

Coinsurance: The Most-Tested Calculation

Most property forms carry an 80% coinsurance requirement. The insured must carry limits equal to at least the stated percentage of replacement cost (or ACV). If under-insured, the partial-loss payment is reduced by the coinsurance formula:

Payment = (Limit Carried ÷ Limit Required) × Loss − Deductible

Worked example: a building has a $500,000 replacement cost, 80% coinsurance, so the required limit is $400,000. The owner insures for only $300,000 and suffers a $100,000 loss with a $1,000 deductible.

• Did-carry ÷ should-carry = $300,000 ÷ $400,000 = 0.75.
• 0.75 × $100,000 = $75,000, minus $1,000 deductible = $74,000 paid.

The insured eats the $26,000 shortfall as a coinsurance penalty. Note: the penalty never applies to a total loss up to the policy limit, and the payment is always capped at the policy limit.

Stated Amount, Pair-and-Set, and Apportionment

Indemnity also shapes several settlement nuances. A stated-amount endorsement caps recovery at a declared figure for hard-to-value property but is still subject to ACV at loss. The pair-and-set clause lets the insurer pay the difference between the value of a complete set and the value of the remaining items after one piece is lost, rather than treating the loss as a total — preventing over-recovery on jewelry, china, or matched pairs.

Pro Rata vs. Contribution by Equal Shares

When two or more policies cover the same loss, other-insurance clauses apportion the payment. Under pro rata sharing, each insurer pays the proportion its limit bears to the total of all limits. Worked example: Policy A carries $200,000 and Policy B carries $300,000 (total $500,000) on a $50,000 loss. A pays 200/500 × $50,000 = $20,000; B pays 300/500 × $50,000 = $30,000. Under contribution by equal shares, each insurer pays equally until the smaller limit or the loss is exhausted.

When Insurable Interest Must Exist

The timing rule is heavily tested and differs by line:

In property insurance the amount of recovery is capped by the extent of the insurable interest. A part-owner of a building recovers only to the value of their ownership share. Parties with insurable interest in property include owners, secured creditors (mortgagees, lienholders to the extent of the debt), bailees holding others' goods, and tenants responsible for leased property.

Trap: a general creditor with no security interest in specific property usually has no insurable interest in that property. A mortgagee's interest decreases as the loan is paid down — recovery is limited to the outstanding balance.

Indemnity and the Doctrines That Enforce It

The principle of indemnity restores the insured to the same financial position held before the loss — no better, no worse. Several doctrines enforce it:

• Subrogation — after paying a claim, the insurer succeeds to the insured's right to recover from the at-fault third party, preventing a double recovery. The insured must not impair this right after a loss.
• Other-insurance / contribution — overlapping policies share the loss so the insured cannot collect the full amount from each.
• Salvage — the insurer may take and sell damaged property after paying a total loss.

Exceptions to strict indemnity include valued policies (pay a stated amount regardless of actual value — common in ocean marine) and replacement cost coverage, which pays more than ACV to offset depreciation. The principle of utmost good faith obligates both parties to deal honestly — supported by representations, warranties, and the duty to avoid concealment.

Trap: replacement cost is a deliberate, contractual departure from pure indemnity; it does not violate the doctrine because the policy expressly provides it.