Home warranty plans are shopped on monthly price, which is the least informative number in the offer. Two plans at the same monthly cost can differ by thousands of dollars in what they actually pay, and the difference lives in two figures: the coverage cap and the service fee.

The coverage cap is the real limit

A cap is the maximum the plan will pay for a covered item during the contract term. Caps are usually stated per item, sometimes per category, and occasionally as an aggregate across the whole contract.

Compare each cap against what the repair actually costs. Rough national ranges for full replacement, before regional labor differences:

  • Water heater, tank type: $1,200 to $2,500 installed
  • Gas furnace: $4,000 to $8,000 installed
  • Central air condenser and coil: $4,500 to $9,000 installed
  • Full HVAC system: $8,000 to $15,000
  • Major kitchen appliance: $700 to $2,500

Against those numbers, a $1,500 heating and cooling cap is a meaningful contribution rather than a replacement. A $3,000 cap covers most repairs outright and a portion of a replacement. Neither is a bad plan. They are different products, and the monthly price should reflect the difference.

Also check whether the cap resets at renewal or applies for the life of the contract, and whether repairs and replacements draw from the same cap. A plan that pays $900 for a compressor repair in March and then applies the remaining $600 toward a full replacement in August is behaving normally under most contracts.

The service fee changes the math on small claims

The service call fee, sometimes called the trade service fee, is paid per visit regardless of outcome. Common options are $75, $100, and $125, and most companies let you choose, with a lower fee costing more per month.

The arithmetic is straightforward. If choosing a $75 fee instead of $125 costs $8 more per month, that is $96 a year to save $50 per call. It pays off at two or more calls per year and loses money below that. Most households file one to two claims a year, so the higher fee with the lower premium is usually the better choice.

Two details matter more than the number itself. First, whether the fee is charged per visit or per claim, because a repair that requires a return trip for parts can be billed twice under a per-visit contract. Second, whether the fee is refunded or waived if the claim is denied. Paying $100 to be told a failure is excluded is the most frustrating outcome in this product category, and some contracts waive the fee in that case.

Working out whether a plan pays for itself

Take the annual plan cost, add the service fees for the number of claims you realistically expect, and compare against the repairs you would otherwise pay for out of pocket.

Worked example. A plan costs $65 a month, so $780 a year, with a $100 service fee. You file two claims: a dishwasher control board and a furnace igniter. Total cost to you is $980. Paying retail, the control board runs about $400 installed and the igniter about $350, so $750. In that year the plan cost you $230 more than paying cash.

Change one variable. The furnace blower motor fails instead of the igniter, at $1,100 installed. Now retail is $1,500 and the plan cost $980, and the plan came out $520 ahead, assuming the cap covered it.

That is the actual nature of the product. It loses slowly in ordinary years and wins in the year something expensive fails. Whether that trade is worth making depends on the age of your equipment and on whether an unexpected $4,000 bill would be an inconvenience or a crisis.

The questions to ask before buying

  • What is the cap for heating, for cooling, and for each appliance category?
  • Is there an aggregate cap across the contract?
  • Is the service fee per visit or per claim, and is it refunded on a denied claim?
  • Are diagnosis, access, permits, code upgrades, and haul-away covered or excluded?
  • What does the plan pay if a replacement part is no longer manufactured?
  • How is a replacement valued: like for like, or a cash payout at the company's cost?

That last question is worth pressing on. Cash-in-lieu offers are often based on the company's wholesale pricing, not what you would pay a local contractor, and the difference comes out of your pocket.