FMCSA maintenance records form: a log that proves the work
Carriers go looking for the official form and don't find one, because there isn't one. What the rule sets is the content, and an investigator samples it one truck at a time.
Written by Rigo Diaz
The maintenance log in numbers
There is no official FMCSA maintenance records form. 49 CFR 396.3 sets what the records must show, not their format: for each vehicle you control for 30 consecutive days, its identification, what inspection and maintenance is due and when, and a dated record of the work done. A paper log or software can both qualify.
When a carrier asks me for the FMCSA maintenance form, the honest answer surprises them: the agency never published one. That freedom cuts both ways. You can keep the log any way you like, and nobody hands you a template that guarantees it holds up.
I spent more than six years in risk management before I founded Simplex, and I have led it for more than 25 years since. This guide covers the fields your log needs, how to write an entry an investigator can follow, who keeps the records on leased trucks, and what a gap costs.
The full briefing, read aloud
7 chapters. Select one to jump to it.
Generated with AI text-to-speech from this article's key insights, in order, rather than reading it word for word. Chapter times come from a transcript of the audio. The article itself was written and reviewed by Rigo Diaz.
Key takeaways
No federal form exists
49 CFR 396.3 sets the content of maintenance records, not the format. Paper, a spreadsheet, or software all work if the required fields are there.
Three things per vehicle
The vehicle's identification, the nature and due date of each inspection and maintenance task, and the date and nature of the work done.
Invoices alone are not a log
Repair bills show what broke. The rule also wants a way to show what is due next, which is the half most files are missing.
Leased trucks are your file
After 30 consecutive days under your control, a leased or owner-operator truck needs a record naming who furnished it, and the duty stays with you.
Have it ready in 2 working days
Keep records where the truck is housed or maintained, or where you choose if it has no single base, and produce them within 2 working days of a request.
Gaps are a critical violation
Failing to keep minimum maintenance records is a critical violation in an investigation, and recordkeeping fines run up to $1,584 a day.
In this articleContents
Is there an official FMCSA maintenance records form?
No. 49 CFR 396.3 says what your maintenance records must show, not what they must look like. A paper log, a spreadsheet, or fleet software all work, as long as each vehicle's record holds the required information.
FMCSA's guidance on computerized records allows them if the minimum records are in the system and can be reproduced on demand. Under 49 CFR 390.32, any record FMCSA's regulations require may be kept electronically, and under 390.31, legible copies may stand in for originals.
The rule doesn't set your service intervals either. FMCSA's guidance says intervals are fleet specific, sometimes vehicle specific, and the carrier sets them. Our truck preventive maintenance guide covers how to build that schedule.
Which forms do other people fill out?
- Roadside inspection report. Inspectors record results on the Driver Vehicle Examination Report. If it lists violations, you certify the corrections within 15 days and keep a copy for 12 months (396.9).
- Annual inspection report. The qualified inspector's report identifies the inspector, the carrier, the date, the vehicle, and each component inspected with its result, and certifies the inspection (396.21).
- Driver vehicle inspection report. Your driver writes it at the end of the day when there is a defect, and you certify the repair before the vehicle runs again (396.11).
None of these replaces the log. FMCSA's guidance says the inspection report and annual inspection rules apply in addition to the systematic maintenance 396.3 requires. For how long to keep each one, see our guide to DOT maintenance file requirements.
What must a DOT maintenance log show?
A DOT maintenance log must show three things for each vehicle you control for 30 consecutive days: which vehicle it is, what is due and when, and what was done and when. Buses add a fourth: tests of pushout windows, emergency doors, and their marking lights.
| Field | Required? | Why it matters |
|---|---|---|
| Company unit number, if the vehicle is marked with one | Yes, 396.3(b)(1) | Ties invoices and roadside reports to the right truck |
| Make, serial number, and year | Yes, 396.3(b)(1) | Identifies the unit even if its number changes |
| Name of the person who furnished the vehicle, if you don't own it | Yes, 396.3(b)(1) | Shows whose truck it is during a lease |
| Each inspection and maintenance task, and when it is due | Yes, 396.3(b)(2) | Proves the maintenance is scheduled, not only reactive |
| Date and nature of each inspection, repair, and maintenance | Yes, 396.3(b)(3) | The history an investigator samples |
| Odometer reading, shop or mechanic, work order number | Recommended | Lets anyone check the work against the schedule |
| Dates the vehicle came under your control and left it | Recommended | Starts the 6-month clock after a truck leaves |
Tire size used to be on the list. FMCSA removed it as obsolete on July 21, 2026 (91 FR 45653), so a template built before then can drop that field.
How do you write a maintenance log entry an investigator can follow?
Write each entry so someone who wasn't there can tell what happened: the date, the unit, the mileage, what was inspected, and what was repaired or replaced. The rule asks for the date and nature of the work. The rest makes the record usable.
- Weak: "3/18: maintenance done."
- Usable: "March 18, Unit 418, 284,215 miles: scheduled PM. Oil and filters changed, brakes inspected, left front brake chamber replaced, tire pressures corrected. Next PM due at 299,215 miles."
The second entry closes its own loop. It records the work and sets the next due point, which is the part of 396.3(b)(2) a folder of invoices never shows.
Close every defect in the same file
A defect usually starts on another document: a driver's report, a roadside inspection, or the annual inspection. The log entry should name that source and the repair that closed it, so the trail reads defect found, repair done, vehicle back in service.
That trail has deadlines. A defect on a driver vehicle inspection report that is likely to affect safety must be repaired, and the repair certified, before the vehicle runs again. Roadside violations are corrected and certified within 15 days of the inspection. A vehicle declared out of service may not be operated, or even towed except by crane or hoist, until the required repairs are done.
Who keeps maintenance records for leased and owner-operator trucks?
The carrier does. Once a truck has been under your control for 30 consecutive days, it needs a maintenance record like any truck you own, and that record must name the person who furnished it.
FMCSA's guidance on leased vehicles lets you do the work yourself or have another party do it, such as the owner-operator or a leasing company. It also says the carrier is solely responsible for making sure the vehicles under its control are safe and that defects have been corrected. "The owner-operator has those records" doesn't move that duty off you.
The leasing rules point the same way. Under 49 CFR 376.12, the lease gives the carrier exclusive possession, control, and use of the equipment, and complete responsibility for its operation, for the lease's duration. The lease must also state when it begins and ends, which gives you the dates for the vehicle's record.
What to collect from an owner-operator
- At lease-on: the truck's make, serial number, and year, the owner's name, a copy of its last annual inspection report, and any open maintenance items.
- During the lease: a copy of every work order or invoice, entered in your log with the next due date for each scheduled service.
- At lease-off: the end date, so the records stay for the 6 months the rule requires after the truck leaves your control.
The annual inspection copy matters on its own: if you didn't perform a truck's last annual inspection, 49 CFR 396.21 makes you responsible for getting the report when an official asks for it. How these duties line up with liability insurance is in our guide to in-service liability for leased trucks.
Where do you keep maintenance records, and how fast must you produce them?
Keep them where the vehicle is housed or maintained, for 1 year, and for 6 months after the vehicle leaves your control. If a truck isn't based at one place, FMCSA's guidance on record location lets you keep the records at a location of your choice.
Wherever they are, that guidance says the records must be current and factual, and available to FMCSA within a reasonable time, which it puts at 2 working days. Under 49 CFR 390.29, records kept at a regional office or driver work-reporting location must reach the agent within 48 hours of a request, not counting weekends and federal holidays.
That window is what makes scattered records risky. If one truck's work orders sit with three outside shops and an owner-operator's glovebox, gathering them can use up most of it. Our compliance programs keep the maintenance records and annual inspection dates in one place for that reason.
What does a missing maintenance record cost you?
In an FMCSA investigation, failing to keep minimum records of inspection and vehicle maintenance under 396.3(b) is a critical violation. A pattern, meaning more than one violation and at least 10% of the records examined, adds a point against the vehicle factor, and the factor ratings decide your DOT safety rating.
The fines run by the day. As of October 2026, failing to keep a required record, or keeping one that is incomplete, inaccurate, or false, carries a civil penalty of up to $1,584 for each day it continues, capped at $15,846. Filling gaps after the fact is worse: knowingly falsifying a required record is a separate violation.
For a new carrier, three of the 16 automatic failures in the safety audit are vehicle items your records prove or disprove: running a vehicle declared out of service before it's repaired, driving with an out-of-service defect a driver reported, and using vehicles without a periodic inspection in 51% or more of the records examined. Our new entrant safety audit checklist lists the rest.
How Simplex helps you keep maintenance records that hold up
The log, the schedule, and the audit all have to agree. We help with each one.
A file for every unit
Our DOT safety compliance team helps you set up and keep the vehicle maintenance records FMCSA samples, alongside driver files and hours of service.
Gaps found before an auditor finds them
Our compliance programs include preventive maintenance records, annual inspection tracking, CSA monitoring, and a DOT mock audit.
Ready for the review
Our audit guidance and support walks you through what FMCSA reviews, including the maintenance and inspection records it asks for.
Frequently asked questions
Is there an FMCSA maintenance records form or PDF?+
What record must be kept on trucks used in interstate commerce?+
Can maintenance records be kept electronically?+
Does an owner-operator with one truck need maintenance records?+
Who keeps maintenance records for a leased truck?+
Where this information comes from
The requirements below come from federal regulation, FMCSA's published guidance, and the Federal Register, checked on October 19, 2026.
-
1
eCFR — 49 CFR 396.3
The required maintenance records for each vehicle controlled 30 consecutive days, and where and how long to keep them.
-
2
FMCSA — Guidance on 396.3, leased vehicles
The carrier may have another party do the work, but stays solely responsible for the vehicle's condition.
-
3
FMCSA — Guidance on 396.3, computerized records
Computerized records are allowed if they hold the minimum information and can be reproduced on demand.
-
4
FMCSA — Guidance on 396.3, record location
Records may be kept at a location of the carrier's choice and must be produced within 2 working days.
-
5
eCFR — 49 CFR 376.12
Lease terms: the carrier's exclusive possession, control, and responsibility, and the lease's start and end.
-
6
eCFR — Appendix B to Part 385
396.3(b) as a critical violation, the 10 percent pattern rule, and the vehicle factor rating.
-
7
eCFR — Appendix B to Part 386
Recordkeeping penalties: up to $1,584 a day, capped at $15,846.
-
8
Federal Register — 91 FR 45653
Tire size removed from the 396.3 vehicle identification, effective July 21, 2026.
Written by
Rigo Diaz
Founder & CEO, Simplex Group
Founder and CEO of Simplex Group, with more than 25 years leading the company and helping trucking entrepreneurs navigate compliance, insurance, and the day-to-day demands of running a carrier. Before founding Simplex, he spent more than six years in risk management, experience that continues to shape how he approaches insurance, compliance, and carrier risk today.
Published · Updated
Related articles and services
If it isn't in the log, it didn't happen
An investigator can't see the brake job you did in March. They can see the entry, the due date it met, and the defect it closed. Keep that trail for every truck under your control, owned or leased.
If you want a second set of eyes on your maintenance records before FMCSA asks for them, talk to our team.