The Warehouse Coinsurance Trap
Hala's packaging business occupies a 40,000-square-foot warehouse she owns. Her commercial property policy shows: building replacement cost $2,000,000 (confirmed by appraisal), building limit $1,200,000, an 80% coinsurance clause, a $10,000 deductible that the form applies to the amount of loss before the coinsurance percentage, replacement cost settlement on the building, and business income coverage of $25,000 per month (net income plus continuing expenses) with a 72-hour waiting period. A fire destroys one roof section. Repair at current cost is $400,000; depreciation on the damaged components is $80,000. Hala has not yet decided whether to rebuild, and the space is unusable for 45 days.
1. Calculate what the policy pays for the building if Hala repairs, and if she decides not to rebuild.
Read the worked answer
Step 1 - coinsurance requirement and fraction
- Required limit = 80% × $2,000,000 = $1,600,000
- Carried limit = $1,200,000
- Fraction = $1,200,000 ÷ $1,600,000 = 0.75 (she is a 25% coinsurer)
Step 2 - if she repairs (replacement cost settlement)
- Loss at replacement cost: $400,000
- Less deductible: $400,000 − $10,000 = $390,000
- Apply coinsurance: $390,000 × 0.75 = $292,500
- The $1,200,000 limit is not a constraint here.
Step 3 - if she does not rebuild Replacement cost settlement is conditional on actually repairing or replacing. Without repair, the loss is settled on actual cash value:
- ACV = $400,000 − $80,000 = $320,000
- Less deductible: $310,000
- Apply coinsurance: $310,000 × 0.75 = $232,500
Result: $292,500 if she rebuilds, $232,500 if she does not - a $60,000 swing driven by a condition, not by the fire. Note that the coinsurance penalty ($97,500 on the repair scenario) is larger than the deductible, which is the real lesson of the file.
2. Calculate the business income payment and explain what determines the end of the period of restoration.
Read the worked answer
Computation
- Time out of operation: 45 days
- Waiting period: 72 hours = 3 days, deducted once per occurrence → 42 days payable
- Daily rate: $25,000 ÷ 30 = $833.33
- Payment: $833.33 × 42 ≈ $35,000
What controls the period of restoration:
- It ends when the damaged property could be repaired or replaced with reasonable speed and similar quality - not when Hala's sales return to normal, and not when she gets around to rebuilding. If she delays rebuilding for her own convenience or because she is deciding whether to relocate, the carrier will argue the period ended earlier.
- The 72-hour waiting period is not a per-day deductible; it is subtracted once and does not restart.
- If the business resumes in part of the building earlier, the carrier may apply a partial-resumption adjustment, so the loss should be documented week by week.
Judgment point: the coinsurance penalty does not apply to business income unless the policy contains a separate coinsurance or monthly-limitation condition on that coverage - do not assume the 0.75 factor carries over.
3. Hala wants to know whether to raise her limit or buy agreed value at renewal. What is your advice, and what evidence supports it?
Read the worked answer
Advice: raise the building limit to at least the coinsurance requirement - $1,600,000, and ideally to the full $2,000,000 replacement cost - or negotiate agreed value in writing.
Reasoning to give the client:
- The coinsurance clause is not a penalty invented by the carrier; it is the mechanism that makes a partial-loss rate work. Carrying 60% of the requirement means Hala is self-insuring 40% of every partial loss, indefinitely.
- Penalties compound with frequency, not severity. Three $100,000 losses in five years cost her far more in coinsurance than one large loss would.
- Agreed value suspends the coinsurance clause when both parties agree in writing on the value, but the carrier will require a current appraisal and will still apply the deductible. It does not fix an inadequate limit; it fixes the argument about value.
- Replacement cost requires action. The $60,000 gap between the two scenarios disappears only if she repairs, so her business-continuity plan and the insurance settlement must be designed together.
- Document the recommendation in writing with the two calculations, and keep the client's decision on file - this is precisely the kind of underinsurance advice that later becomes an errors-and-omissions claim.