How Do Home Insurance Companies Calculate Depreciation?
They subtract value for age and wear, based on an item's expected lifespan, to reach actual cash value.
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How the deduction gets applied to your claim
The adjuster assigns each damaged item an expected lifespan and figures out how much of that lifespan is used up. A 12-year-old roof with a 25-year lifespan has used about half its life, so you'd see roughly half its replacement cost deducted. The same math applies to flooring, appliances, siding, almost anything with a useful life shorter than the house itself. This is why the check for a damaged roof often looks much smaller than a new roof actually costs. If your policy has replacement cost coverage, you can usually recover that withheld depreciation after the repair or replacement is done, by sending the adjuster your receipts. Your declarations page tells you whether you carry replacement cost or actual cash value coverage, and that answer changes what you can expect back.
What your policy actually pays out
Depreciation can shrink a check far below what repairs cost. Whether you recover that gap depends on the coverage you carry. Comparing policies now shows which ones pay replacement cost instead of leaving you short.
What if the depreciation number looks wrong
Adjusters work from tables and software that estimate useful life for materials and categories, not from your specific roof or your specific carpet. Those tables assume average conditions, average maintenance, average weather. If your roof was replaced early, if you kept records of upgrades, or if the item wasn't as old as the adjuster assumed, the depreciation figure can be off. You're allowed to challenge it.
Start by asking the adjuster for the depreciation worksheet, not just the final number. It should show the age they used for each item, the expected lifespan, and the percentage deducted. Compare that against what you actually know. Receipts for a roof replacement, a renovation permit, even photos with timestamps can show an item is newer than the adjuster assumed. Paint supports this. A number without paper behind it is just an argument.
Materials matter too. Some adjusters apply a generic lifespan to a category, like flooring, without accounting for the type installed. Tile and laminate don't age the same way, and a policy or state guideline may list different expected lifespans for each. If the depreciation schedule lumps your higher-grade material in with a cheaper default, that's worth raising. Ask specifically what lifespan was assigned and whether it matches what's actually in the house.
If the adjuster won't adjust the figure, most policies allow a second opinion through an appraisal clause, where each side hires an appraiser and a neutral umpire settles disagreements on the amount of loss. Your declarations page or policy booklet spells out whether this option exists and how to invoke it. Some states also have a department of insurance that will review a dispute if you believe the depreciation applied doesn't match your policy's terms or the condition of the item. None of this guarantees a different number, but a documented challenge gets taken more seriously than a phone call saying the check seems low.
Can depreciation apply to more than one part of the same claim
Depreciation isn't a single number applied to the total loss. It's calculated item by item, which means a kitchen fire claim might involve separate depreciation figures for cabinets, flooring, appliances, and drywall. Each has its own expected lifespan, so a 3-year-old refrigerator depreciates very little while 15-year-old cabinets might lose a third of their value. The final check reflects dozens of small calculations added together, not one broad estimate.
Bigger claims make this easy to miss. With more damaged items, it's easy to focus on the bottom line and skip what's happening underneath it. Ask for the full line-item breakdown, not a summary total. If the paperwork only shows a lump depreciation figure, request the itemized version, because you can't check the math or catch an error on a single item once everything's been collapsed into one number.
Labor often gets depreciated too, depending on the state and the policy, even though labor doesn't wear out the way materials do. Some insurers depreciate only the materials portion of a repair and pay labor in full. Others apply depreciation to both. This varies enough that it's worth asking directly which approach was used on your claim, since it can change the total by a meaningful amount.
Categories also get grouped in ways that aren't always obvious. A claim involving both roof and interior water damage might treat the roof as one depreciation schedule and the drywall, insulation, and flooring as another, each with different assumed lifespans. If something feels off, ask which category each damaged item was sorted into and why. Knowing how the claim was broken apart is often the first step to finding where a number went wrong.
Before you accept the check
Ask for the itemized depreciation worksheet, not just the total. Check it against your declarations page, and against any receipts or dates you have for repairs or upgrades the adjuster may not have known about.
