The warranty clock: when does it actually start?
Two identical laptops with a '36 month warranty' can leave you with very different cover. The difference is the day the clock started.
3 October 2026 · 2 min read
A warranty has a length and a start. Shops talk about the length. The start is what decides how much you actually get, and it is not the same for every product.
Two clocks
| From invoice date | From manufacture date | |
|---|---|---|
| The clock starts | The day you are billed | The day the unit was made |
| A unit made 14 months ago, bought today | 36 months left | 22 months left |
| A unit made 30 months ago, bought today | 36 months left | 6 months left |
These figures are an example, not a quote from any brand. What it shows is that with a manufacture-date clock the age of the stock is part of the price: the same machine is worth less to you the longer it sat on a shelf before you bought it.
Which one applies to what you are buying?
It depends on the brand and on the product line, and it can differ between the same brand's laptop and its accessories. Components and peripherals sold through distributors — memory, storage, power supplies, many accessories — are often covered from the manufacture date; some laptops and phones are covered from the date of purchase or activation. Do not assume. Ask.
Ask which clock it is, in words
'Does the warranty run from the manufacture date or from my invoice date?' A shop that knows will answer in one breath.
Look up the serial number
The maker's warranty-check page shows the end date it has on record. If that date is earlier than the shop's story implies, that is your answer.
Compare on 'left', not on 'length'
36 months from manufacture on a unit made two years ago is 12 months. Sort offers by year of manufacture and read the warranty line against it.
Get it written on the invoice
Warranty length, who honours it (the maker, or the shop), and where the clock starts. If it is not written down, it is a conversation, not a warranty.