An extended warranty pitched at checkout usually gets summarized in one sentence by the sales associate: "if it breaks, you're covered." What that sentence leaves out is whether the coverage is full-replacement-value or prorated — and for a lot of extended appliance warranties, it's prorated, which means the payout shrinks every year you own the appliance, sometimes down to a fraction of what you'd need to replace it.
Prorated means the clock is already running against you
A prorated warranty calculates your payout based on the appliance's depreciated value at the time of the claim, not its original purchase price or current replacement cost. A washing machine that cost $800 new might be valued at $400 in year three under the warranty's depreciation schedule — so a "covered" failure in year three pays out $400 toward a replacement that now costs $900 with inflation, leaving a gap the warranty never mentioned covering. The word "covered" is accurate; the amount it's covered for is the part that matters and the part that's easy to miss at the point of sale.
The depreciation schedule is set by the warranty, not the market
Providers use their own depreciation curve, and it's rarely as generous as straight-line value loss — some schedules front-load the depreciation so a claim in year two already pays out less than half of the original price. This number is disclosed in the contract, usually in a table, but it's not the number featured in the marketing copy or the in-store pitch. If a warranty is prorated, the schedule itself is the single most important number in the entire contract, more relevant to what you'll actually receive than the headline coverage length.
Full-replacement warranties exist, and cost more for a reason
Some extended warranties instead guarantee full replacement-cost value regardless of age, or replacement with a comparable current model — genuinely different coverage that justifies a higher premium. The higher price isn't automatically a worse deal; it's paying for the exact thing a prorated warranty doesn't give you. Comparing two warranties by price alone, without checking which payout structure each one uses, means comparing numbers that aren't measuring the same benefit.
What to check before buying an extended warranty
- Search the contract for the word "prorated," "depreciated," or "actual cash value" — any of these signal a shrinking payout, not a flat one.
- If prorated, find the actual depreciation table or schedule, not just the headline coverage years — a 5-year warranty that's nearly worthless by year 3 is a different product than the pitch implies.
- Compare the warranty's cost against the appliance's own failure-rate reputation — a reliable appliance may make even a generous warranty low-value, while a model with known common failures changes that math.
- Check whether your credit card already extends the manufacturer's warranty for free — many cards do, for a limited additional period, at zero incremental cost.
The takeaway
"Extended warranty" describes a duration, not a payout structure, and the payout structure is where most of the disappointment happens later. A prorated warranty isn't a scam — it's a real, disclosed contract term — but it pays out a shrinking fraction of value over time, and that detail belongs in the buying decision, not just the fine print you read after a claim gets denied for less than you expected.