How to Calculate Actual Cash Value of Your Home
Take the cost to rebuild that item new, then subtract depreciation for its age and wear.
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Working out your own number
If your policy pays actual cash value instead of replacement cost, the insurer starts with what it costs to replace the damaged item new, then subtracts depreciation based on its age and expected lifespan. A roof with a 25-year life that's 10 years old has used up 40% of its life, so the payout reflects 60% of today's replacement cost, minus your deductible. You can check this math yourself. Look at the adjuster's worksheet for the item's age, the useful life they assigned it, and the replacement cost before depreciation. If any of those numbers look wrong, like a roof listed as older than it is or a shorter lifespan than the material actually has, that's where to push back, with receipts, photos, or a contractor's estimate as backup.
ACV policies don't all pay the same
Depreciation schedules and replacement cost estimates differ by insurer. If your policy pays actual cash value, what you'd collect on the same loss can vary. Compare quotes to see where you'd come out ahead.
What counts as depreciation, and what doesn't
Depreciation is only supposed to apply to the age and wear of the item itself, not to inflate the gap between what you're owed and what you need. An adjuster can reduce a 10-year-old roof's value because shingles wear out over time. They can't also depreciate labor costs. Some states don't allow labor to be depreciated at all, and even where it's allowed, it should be a small, clearly stated line item, not folded into the overall percentage taken off the claim. If the worksheet shows one lump depreciation number applied to the whole estimate, ask for the breakdown between materials and labor.
Material quality matters too. If your roof has architectural shingles rated for 30 years, but the worksheet assumes a 20-year lifespan for a basic three-tab shingle, you're being depreciated on the wrong schedule. The same goes for flooring, siding, and appliances. A mid-range refrigerator and a high-end one don't wear out on the same timeline, and the replacement cost before depreciation should reflect what you actually had, not the cheapest version of it. Receipts, model numbers, or photos from before the loss are what back this up.
Pre-existing damage is a separate issue from depreciation, but adjusters sometimes mix the two. If part of the loss is attributed to wear that existed before the event you're claiming, that portion gets excluded entirely rather than depreciated. That's a different calculation, and it's worth asking the adjuster to point to exactly which damage they're calling pre-existing and why, since this is where disagreements often start.
Once you have the worksheet broken down this way, replacement cost, age, useful life, and any depreciation of labor, you can check each number against what you know about the item. A contractor's written estimate carries more weight than a verbal disagreement, especially if it states the material grade and expected lifespan. If the numbers still don't match after you've raised this with the adjuster, most states let you request a reinspection or involve a public adjuster before the claim is considered final.
What to do when the depreciation number still looks wrong
Sometimes every line on the worksheet checks out and the total still feels too low. That usually means the dispute isn't about one wrong number but about how the estimate was built in the first place. Two adjusters can start from the same roof and land on different replacement costs if one used a regional price list that's out of date or missed a detail like steep roof pitch, which adds labor the flat-rate estimate doesn't capture.
Most policies include an appraisal clause for exactly this situation. Either side can invoke it when they can't agree on the amount of the loss, not on whether the claim is covered at all. Each side hires an appraiser, the two appraisers pick a neutral umpire, and a majority decision sets the payout. It costs money, since you're paying your own appraiser, so it tends to make sense on larger claims where the gap between the offer and your estimate is big enough to justify the fee.
Before going that route, ask for a written explanation of how the replacement cost was calculated, not just the final figure. Insurers generally use standardized estimating software, and the adjuster should be able to show which price list and labor rates they applied. If a local contractor's bid comes in well above that software estimate, the gap is worth raising directly, since it may mean the software didn't account for something specific to your house, like difficult access or local permit costs.
If the claim was denied outright rather than underpaid, the calculation questions above don't apply yet. A denial means the insurer says the cause of loss isn't covered, which is a different argument than how much a covered loss is worth. Your policy's declarations page and the denial letter should state the specific exclusion being used. Every state has a process for appealing through the department of insurance if you think a denial or a lowball offer was handled in bad faith, and that process runs separately from the claim itself.
Before you sign off on the number
Pull the adjuster's worksheet and check the age, useful life, and replacement cost listed for each item against your receipts or a contractor's estimate. That comparison is what decides whether the offer is right.
