3.3 Dwelling Perils, Conditions, and Endorsements

Loss settlement and the coinsurance condition

DP-2 and DP-3 pay replacement cost on the dwelling only if the insured carries at least 80% of the full replacement cost at the time of loss. This is the replacement-cost (coinsurance) condition. If the insured carries less than 80%, the insurer pays the greater of ACV or the coinsurance formula amount, then subtracts the deductible.

Coinsurance formula:

Payment = (Amount of insurance carried ÷ Amount required) × Loss − Deductible

where Amount required = 80% × replacement cost of the dwelling.

Worked example

A home has a replacement cost of $400,000. Required to meet the condition: 80% × $400,000 = $320,000. The owner carries only $240,000. A partial loss of $100,000 occurs; the deductible is $1,000.

• Ratio = $240,000 ÷ $320,000 = 0.75
• 0.75 × $100,000 = $75,000
• Minus $1,000 deductible = $74,000 paid

The $25,000 shortfall is the coinsurance penalty the insured absorbs for underinsuring. Had the owner carried $320,000 or more, the full $100,000 (less deductible) would be paid up to the policy limit. A total loss is paid up to the policy limit regardless of the formula (the formula matters most for partial losses).

ACV vs replacement cost

ACV = Replacement Cost − Depreciation. DP-1 pays ACV on the structure; DP-2/DP-3 pay replacement cost (subject to the 80% condition). Personal property is generally ACV unless endorsed. Knowing how to compute ACV is a common exam task: a 10-year-old roof with a 20-year life that costs $20,000 to replace has roughly $10,000 of depreciation, so ACV ≈ $10,000.

Standard policy conditions

• Other Insurance — if more than one policy covers a loss, the insurer pays its pro rata share (its limit ÷ total of all limits).
• Suit Against Us — the insured must bring legal action within 2 years after the loss (state law may modify).
• Subrogation — after paying a loss, the insurer takes over the insured's right to recover from a responsible third party.
• Our Option — the insurer may repair or replace damaged property with like kind and quality instead of paying cash.
• Loss Payment / Duties After Loss — the insured must give prompt notice, protect property, and submit a signed, sworn proof of loss within 60 days of the insurer's request.
• Vacancy — if the dwelling is vacant beyond 60 consecutive days, coverage for certain perils (vandalism, glass breakage, water, theft attempts) is suspended, and other losses may be reduced.

Most-tested endorsements

Remember: flood and earthquake are never covered by endorsement within these base perils alone — flood requires NFIP, earthquake requires its own endorsement/policy.

Reading a coinsurance question quickly

On the exam, a coinsurance problem always hands you four numbers: the replacement cost, the amount carried, the loss, and the deductible. Work them in a fixed order so you do not stall. First multiply replacement cost by the coinsurance percentage to get the amount required. Second, divide the carried by the required to get the ratio. Third, multiply the ratio by the loss. Fourth, subtract the deductible. Cap the result at the policy limit.

If the ratio comes out at or above 1.0, the insured met the condition and is paid the loss in full (less deductible), so do not apply a penalty. The penalty only bites when the insured carried less than the required amount. A total loss is paid to the limit regardless of the formula, which is why the formula matters most for partial losses — a detail exam writers exploit by giving a partial loss when students expect the full limit.

The inflation-guard endorsement (Automatic Increase in Insurance) exists precisely to keep insureds from drifting below the 80% line as construction costs rise. If a question describes a homeowner whose limit has not changed in several years while rebuild costs climbed, the predictable consequence is an unintended coinsurance penalty at the next loss.

Vacancy, Duties After Loss, and Reading the Penalty Fast

Two conditions generate disproportionate exam traffic. The vacancy condition suspends coverage for vandalism, glass breakage, certain water losses, and theft attempts once the dwelling is vacant beyond 60 consecutive days, and reduces other recoveries by a stated percentage; a builder's risk or seasonal-home fact pattern is usually probing this rule. The duties after loss require prompt notice, protection of property from further damage, and a signed, sworn proof of loss within 60 days of the insurer's request — miss the proof-of-loss window and the claim can be denied even when the peril was covered.

For the coinsurance condition, build a fixed mental checklist so you never stall: (1) required = 80% x replacement cost; (2) ratio = carried / required; (3) tentative pay = ratio x loss; (4) subtract deductible; (5) cap at the limit. If the ratio is 1.0 or higher, the insured met the condition and is paid in full less deductible — no penalty. The penalty bites only on partial losses where the insured carried less than required; a total loss pays the policy limit regardless of the formula. Inflation-guard (Automatic Increase in Insurance) exists precisely to keep a stale limit from sliding below 80% as rebuild costs climb.