Coinsurance is one of the quieter clauses on a commercial property policy, and one of the more expensive to misunderstand. It requires you to insure the building to a set percentage of its value, and if you fall short, a penalty can reduce even a partial-loss payment. Agreed value is the option that removes that penalty risk by settling the insured value up front. The choice between them is really a choice about who carries the risk that the building was undervalued, you or the carrier.
How coinsurance works
A coinsurance clause requires you to insure the building to a set percentage of its value, often a high one. If the limit meets that requirement, the policy pays normally. If it falls short, a coinsurance penalty reduces the payment in proportion to how far under you were. The trap is that it bites hardest on partial losses, which are far more common than total losses. An owner can carry a large limit and still be penalized because it did not meet the required percentage of current value.
How agreed value works
Agreed value suspends the coinsurance clause. You and the carrier agree on the insured value of the building up front, usually supported by a valuation, and with that value agreed, the coinsurance penalty generally does not apply. A partial loss is not reduced for being underinsured against a required percentage, because the value was settled when the policy was written. In effect, agreed value takes the penalty math out of the claim, which is exactly where owners least want a surprise.
Why the valuation matters
Both paths depend on the building being valued correctly, but they handle it differently. Under coinsurance, the required percentage is figured on current value at the time of loss, so a limit that has not kept pace with rising construction costs can quietly fall short. Under agreed value, the number is fixed up front, which is why carriers generally require a supporting valuation. The same replacement-cost valuation that keeps a coinsurance limit adequate is what backs an agreed-value figure.
The tradeoffs
Agreed value is not free. It generally costs more and requires a current valuation, which is work up front. It also is not a shortcut around insuring to value, since the agreed number still has to be accurate. What it buys is certainty. The coinsurance penalty risk on partial losses goes away. For an owner with several buildings, agreed value can pair with a blanket limit to simplify the program further, though the mechanics differ.
Which one fits
If you want to remove the coinsurance penalty risk and you have, or are willing to obtain, a reliable valuation, agreed value often fits, despite the higher premium. If your building limit is well maintained and updated against current construction costs, a coinsurance policy can be perfectly adequate and cost less. The deciding factors are how current your valuation is, how much certainty you want on partial losses, and whether the premium difference is worth removing the penalty math.
Questions to ask your advisor
- Does my policy carry a coinsurance clause, and at what percentage?
- Is my building currently insured to that required percentage of its value?
- Would an agreed-value option remove my coinsurance penalty risk?
- What valuation would the carrier need to support agreed value?
- How does the premium difference compare to the penalty I could face on a partial loss?
Coinsurance rarely announces itself until a partial loss turns it into a reduced check, and by then the choice has been made for you. Agreed value moves that decision to the front, where it belongs, in exchange for a valuation and usually a higher premium. A coverage review checks your limit against a current valuation, identifies any coinsurance clause, and shows whether agreed value would close the gap, so a partial loss is settled by your policy rather than by a penalty.
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