You pay your premium every year, assume you're covered, and never look at the policy again. Then a fire destroys your kitchen, and the adjuster tells you your $300,000 dwelling limit will pay only $240,000 of the $350,000 rebuild — because you didn't carry enough coverage and triggered a coinsurance penalty. Underinsurance is the silent risk in most portfolios.
Replacement cost vs actual cash value
Replacement cost pays what it takes to rebuild today, with no deduction for age or wear. Actual cash value subtracts depreciation: a ten-year-old roof may cost $15,000 to replace but return only $7,000 under ACV. If your policy says "ACV" on the declarations page, you're already underinsured by design. Replacement-cost coverage is non-negotiable for owner-occupied homes.
The coinsurance trap
Most homeowner policies include an 80 or 90 percent coinsurance clause: you must insure the dwelling to at least that percentage of full replacement cost, or the carrier will reduce every claim — even partial ones. If your home needs $400,000 to rebuild and you carry only $280,000 (70 percent), the insurer pays 70/80 = 87.5 percent of any loss, and you eat the rest. A $50,000 kitchen fire becomes a $43,750 check and a $6,250 bill. The penalty applies whether the loss is total or not.
Why limits lag behind reality
Construction costs have climbed 30–40 percent in many markets since 2020. Labor shortages, lumber swings, and permit delays push rebuilds well above older appraisals. If you set your dwelling limit five years ago and haven't adjusted for inflation, you're probably 20–30 percent short today. An annual policy review — ideally with a reconstruction-cost estimator, not just tax-assessed value — keeps the limit realistic.
Extended and guaranteed replacement cost
Extended replacement cost endorsements add a cushion, typically 25 or 50 percent above the stated limit, so a $300,000 policy stretches to $375,000 or $450,000 if rebuilding runs over. Guaranteed replacement cost (rarer and pricier) promises to rebuild to code no matter the expense, though exclusions for ordinance-and-law upgrades often apply separately. Both endorsements cost 10–20 percent more in premium but eliminate coinsurance penalties and cover inflation spikes. These figures are illustrative; rates and products are subject to change and this is not a commitment to lend.
The Alliance take
Pull your declarations page right now and compare the dwelling limit to a recent contractor estimate or online rebuild calculator. If the gap is more than 10 percent, request a coverage increase before your next renewal. Underinsurance saves a few hundred dollars a year and costs tens of thousands when you file a claim. We walk clients through coverage audits as part of every home purchase and annually thereafter — because the best time to find a gap is before the loss, not after. Start an application and let's make sure your coverage matches your exposure.