A waiting period is the stretch after a contract starts during which a breakdown is not yet covered, or is covered only in part. Many contracts use one. The length and the start point decide how much of the contract is available on the day you need it, so the clause deserves the same close reading as the price line.
Ask what starts the clock
Ask the seller, then read the contract for the start point. Common candidates are the date you pay, the date the contract is issued, the date the item is delivered or installed, and the date a first inspection is recorded. Each one moves the period by a different amount. If the contract does not name the start point, ask the seller to name it in writing before you pay.
Ask what a failure in the period means
Ask what happens if the item fails inside the waiting period. Some contracts refuse the claim, some offer a refund of what you paid for the contract in full or in part, and some hold the claim until the period ends. Find the sentence that describes this case and check that it matches what the seller told you. Where the two differ, the written sentence governs.
Ask whether the clock restarts
Check whether a renewal, a transfer to a new owner, or a change in coverage starts a new waiting period. A new period on renewal can leave a gap that looks like continuous coverage on the front page of the contract.
Ask how the start date is recorded
Ask for the written confirmation that shows the start date, and keep it with the contract. If the seller records the start later than the sale, the period grows without your noticing. A dated confirmation is the record you will be asked to show if a claim arrives early.
Check the state rule, then the contract
Waiting period rules may come from the state, from the contract form, or from both. Each state page on this site names the statute or program that governs contracts in that state and the as-of date of its roster. This guide has not read the waiting period rule for every state, so check your state page for the governing statute, then read the contract against it. Where the contract is silent on a point the statute covers, ask the seller which rule applies and get the answer in writing.