Replacement cost pays what it takes today to repair or rebuild with materials of like kind and quality, up to the dwelling limit printed on your declarations page. Actual cash value starts from that same repair estimate and then subtracts depreciation: the value the damaged part had already lost to age and weather before the storm, fire or burst pipe arrived.
Picture a shingle roof that is twelve years into its working life when a hurricane strips part of it. On a replacement cost basis, the claim is measured by what a roofer charges to install new shingles. On an actual cash value basis, the adjuster first takes off the share of the old roof's life that was used up, and that share stays with you, on top of your deductible. How much comes off depends on the policy wording and the estimate, which is why the method matters more than the label on the policy.
The method can also differ inside one policy. Some homeowner forms settle the dwelling at replacement cost but the roof surface, a detached structure or your belongings at actual cash value, and that change usually lives in an endorsement rather than on page one. Ask which method applies to each part of your coverage, and get the answer in writing on the quote.
