Years of shop labor are the part of a repair bill that most owners never read. A service contract pays for parts and labor on a covered repair, and the labor part is set by a clause that names an hourly rate, a labor time guide, or both. Read that clause before you compare two offers, because two contracts with the same covered parts can pay a shop very different amounts for the same job.
What the clause usually says
Three arrangements show up most often. Some contracts pay the shop the rate it posts for its own work, up to a stated cap. Some pay a fixed hourly rate written into the contract, whatever the shop charges. Some pay the shop's actual rate on the invoice with no cap. Each one lands differently on the owner. A cap means the owner may cover the gap when a shop charges more. A fixed rate may leave the owner to find a shop willing to accept it. An uncapped rate reads well, but confirm it in writing.
Labor time guides
Many contracts do not pay for the hours the mechanic actually spent. They pay the hours printed in a published labor time guide for the job. Ask which guide is named, whether that guide is fixed or updated during the term, and whether the contract allows extra time for a repair the guide does not list. A job that takes longer than the guide allows can leave a gap that the shop bills to the owner.
Diagnostic time
Finding the fault takes time before any part is touched. Ask whether diagnostic time is paid, how many hours it covers, and whether it is paid only when the repair turns out to be covered. Some contracts pay for diagnosis only after a covered repair is approved. Get that answer in writing, because an owner who pays for a diagnosis that leads to a denied claim should know that before the shop starts work.
Questions to ask before you sign
Ask what hourly rate the contract names. Ask whether it is a cap, a fixed rate, or the shop's own posted rate. Ask who sets the rate and whether it can change during the term. Ask which labor time guide applies and whether the contract names it. Ask whether diagnostic time is covered and under what condition. Ask what happens when the shop charges more than the rate, and whether the owner pays the difference or the contract company pays the shop directly. Ask for a sample claim that shows the labor line.
Compare the rate and the hours together
Two quotes can show the same total and still differ. One contract may pay a higher hourly rate with fewer covered hours, while another does the reverse. Put both sets of terms side by side from the paper, not from the sales sheet. Read the rate clause, the labor guide clause, and the diagnostic clause as one set. Where the paper and the sales talk disagree, the paper is what gets checked at claim time.
Where to look next
The general rules for reading exclusions and listed parts are on the exclusionary versus listed-parts page. The scoring method is explained on the rubric page, and the published figures for the companies on this site sit in the tables on the front page. None of those pages can tell you what a specific shop will charge on a given day, so ask the shop, and ask the contract company, in writing.