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Preventive maintenance due

Miles and engine hours to the next PM, which triggers first and the expected due date in days.

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Your numbers

Odometer at last PM (miles)From the last work order.Odometer now (miles)Current reading.Mileage interval (miles)From your PM program (e.g. PM-A every 25,000 miles).Engine hours at last PM (h)From the last work order.Engine hours now (h)Current reading.Engine-hour interval (h)Use for trucks that idle a lot.Average miles per dayRecent daily average.Average engine hours per dayIncludes idle.

For the schedule and work order8 more, filled with typical values

PM labor (hours)Book hours for this PM level from your PM program or the last work order.Shop labor rate ($ per hour)Your shop's loaded rate, or the vendor's posted rate.Parts and fluids ($)Filters, oil, grease and the usual parts for this PM level.Days in the shop per PM (days)From drop-off to back in service.Cost of a day off the road ($ per day)Lost revenue, a rental truck or a missed route for one day.Days since the last annual inspection (days)From the date on the periodic inspection report or decal.Lead time to book the bay (days)How far ahead the shop or vendor needs the truck booked.Operating days per year (days)Days the truck runs, for the PMs per year.

Preventive maintenance dueForge by Norventus

How it works

Press Calculate to see the miles and engine hours to the next PM and when it is due.

The interval that runs out firstEngine, meter and standService tag: days to the PMPress Calculate and the counters show the miles and engine hours left to the next PM, worked out by the tool; the lamp marks whichever runs out first, and the tag on the filler cap shows the days until it is due.

Result

Ready when you are.Enter your numbers and press Calculate.

References

Check the work against these

A PM schedule with the book-by day and the annual inspection folded in, a work-order cost sheet with downtime, the program's cost per year and a 49 CFR 396 records check. Numbers in the result and in the plain-words read point here.

1
49 CFR 396.3, Inspection, repair, and maintenanceCode
eCFR (Federal Motor Carrier Safety Regulations)
Every carrier systematically inspects, repairs and maintains its vehicles, keeps a record per vehicle with the due dates and the work done, and keeps it 1 year where the vehicle is housed and 6 months after it leaves.
2
49 CFR 396.17, Periodic inspectionCode
eCFR (Federal Motor Carrier Safety Regulations)
A vehicle may not be used unless it passed a periodic inspection in the past 12 months, with the report or a decal carried on it. Each trailer counts as its own vehicle.
3
Inspection, Repair, and Maintenance (Part 396) brochureHandout
Federal Motor Carrier Safety Administration
FMCSA's summary of Part 396: the annual inspection covers the minimum standards list, and the periodic inspection report is kept 14 months.
4
Appendix A to Part 396, Minimum Periodic Inspection StandardsCode
eCFR (Federal Motor Carrier Safety Regulations)
The item list the annual inspection must cover (brakes, coupling, fuel, exhaust, lighting, steering, suspension, frame, tires, wheels, windshield wipers). Use it as the annual line on the work order.
5
Truck operating costs rose 3.4% in 2025, ATRI findsStudy
Transport Topics
Coverage of ATRI's 2026 cost study: repair and maintenance averaged about 40.4 cents a mile in 2025. A yardstick for the whole maintenance line, not only PMs.

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Preventive maintenance due

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