An extended warranty is offered in the last seconds of a transaction, after the decision to buy has been made. The timing is the most carefully chosen element of how these plans are sold.
The margin sits in the plan, not the hardware
Consumer electronics are sold at thin margins because prices are easy to compare and shoppers compare them.
Protection plans carry no such comparison, and only a portion of what is collected is ever paid out in claims.
The remainder is margin, which is why staff are trained and often incentivised to offer them on every eligible sale.
The moment of purchase creates the receptiveness
A shopper who has just committed a substantial sum is briefly focused on the risk of that purchase going wrong.
Presenting insurance at exactly that point produces a much higher acceptance rate than offering the same plan a week later.
The amount also appears small next to the price just agreed, which is a comparison that would not hold if the plan were sold on its own.
Coverage often overlaps with existing protection
Manufacturer warranties already cover defects for a period, and the first stretch of an extended plan frequently duplicates that coverage.
Some payment cards extend manufacturer warranties automatically, and household insurance may cover accidental damage and theft, though terms vary widely.
Working out what is genuinely additional requires reading several documents, which is not possible at a counter with a queue behind you.
Failure rates decide whether it is worth it
Electronics fail in a pattern, with early defects appearing quickly and the rest arriving late in the product's life as components wear.
The middle years, which is where extended coverage typically sits, are the period of lowest failure, and plans are priced with that knowledge.
Devices carried and dropped are a different case, since accidental damage is common and is not covered by any manufacturer warranty.
What the terms actually say
Plans differ on whether they repair or replace, whether replacement is with an equivalent current model, and whether the plan ends once a claim is paid.
Deductibles, claim limits, exclusions for wear and requirements to use specific service centres all affect what the coverage is worth in practice.
The document is available before buying, and reading it is the only way to establish whether the plan covers the outcome the buyer is worried about.