Nothing sours a service call like discovering on the doorstep that a repair you quoted as free is actually billable. One comparison in the dispatch sheet settles it before anyone drives anywhere.
A unit 14 months old with a 12-month parts warranty is out of warranty — the customer pays.
The example
Three dispatch tickets with the unit's age and the manufacturer's term, both in months.
| A | B | C | D | |
|---|---|---|---|---|
| 1 | Ticket | Age (months) | Term (months) | Status |
| 2 | Washer 4412 | 14 | 12 | Out of warranty |
| 3 | Fridge 8801 | 9 | 12 | Covered |
| 4 | Range 2290 | 44 | 60 | Covered |
The formula
A single comparison inside IF:
How it works
Keeping both values in months is what makes this trivial:
B2is the unit's age in months, taken from the install or purchase date.C2is the warranty term for that manufacturer and part — often 12 months on labor and longer on sealed components.B2>C2is TRUE once the unit has outlived its term.IF(...)turns that TRUE or FALSE into words the dispatcher can read at a glance.
Note the boundary: exactly 12 months against a 12-month term returns Covered, because the test is strictly greater than. If your policy expires on the anniversary, use >= instead.
Try it: interactive demo
Enter the unit age and the warranty term, both in months.
Variations
Separate parts and labor terms
Most manufacturers cover parts longer than labor; test both.
Months remaining
Useful for an extended-warranty upsell at the end of the call.
Pitfalls & errors
Warranty usually runs from the install or delivery date, not the manufacture date. A unit that sat in a warehouse for six months is younger than its serial number suggests.
Keep the term in a column rather than the formula. Terms differ by brand, by component, and by whether an extended plan was sold.
Practice workbook
Frequently asked questions
Can I do this from dates instead of months?
What about extended warranties?
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