Annual DOT Inspection for Trucks: Every Unit, Every 12 Months

A roadside inspector waves you in and asks for your annual inspection proof. Do you have it on the truck? Do you have it for the trailer too? Many drivers are surprised to learn that every unit needs its own. Here is how the annual DOT inspection for trucks works, in plain words.

What the annual DOT inspection is

The annual DOT inspection is a full check of your truck or trailer, done at least once every 12 months. Its official name is the periodic inspection. The rule is 49 CFR 396.17. The idea is simple: a qualified inspector looks at the vehicle to make sure it meets the federal safety standards. This is not the same as a roadside inspection. A roadside inspection happens when an officer stops you. The annual inspection is one you set up on your own.

Annual DOT inspection for trucks: every unit counts

The rule says every commercial motor vehicle must pass an inspection at least once in the past 12 months. In a combination, each piece is counted on its own. That means:

• The tractor.
• Each semitrailer.
• A full trailer, if you pull one.
• A converter dolly, if you use one.

If you pull three different trailers over the year, each one needs a current inspection. Ask the trailer's owner for proof before you hook up. If you do not own the trailer, you still want to know it is current.

How the 12 months are counted

The 12 months start on the last day of the month in which the inspection was done. So if your truck passed on March 5, the 12 months run from March 31. Put the date on your calendar the day you pass, and plan your next inspection before the month runs out.

Proof of inspection must be on the vehicle

You have to carry proof on the vehicle. It can be the inspection report itself, or a sticker or decal. The proof must show:

• The date of the inspection.
• The name and address of the carrier or inspection provider that did it.
• Information that identifies the vehicle.
• A statement that the vehicle passed the inspection under the rule.

Do not leave the paper in your office drawer. It has to be with the truck or trailer.

Keep the report for 14 months

The report also has to be kept. Federal rules say to keep it for 14 months from the date of the report. The copy must be kept where the vehicle is housed or maintained, and it must be available when an authorized official asks for it. If someone else did the inspection, you are still responsible for getting a copy when it is requested.

Why it matters for new carriers

If you are a new carrier, this one matters even more. Using a vehicle without a required periodic inspection is one of the violations that can fail a new entrant safety audit right away. Our new entrant safety audit guide explains what FMCSA checks in your first year. Failing to do the annual inspection can also lead to penalties for the carrier.

Mistakes to avoid

• Only inspecting the tractor. Trailers count too.
• Letting the date slip. Book early so a busy shop does not push you past your month.
• Leaving the proof at home. Keep it on the vehicle.
• Tossing the report too soon. Keep it for 14 months.
• Assuming a borrowed trailer is current. Ask for the proof.

For more on getting your records ready, read how to prepare for a DOT compliance audit.

When to call us

TCZ Permits helps owner-operators keep their filings and compliance records in order. Call us at 956-526-6727. We cannot do the inspection for you, but we can help you keep your dates and paperwork straight.

Common questions

How often does a truck need an annual DOT inspection? At least once every 12 months. The 12 months count from the last day of the month the inspection was done.

Does my trailer need its own inspection? Yes. Each unit in a combination is inspected individually, including semitrailers and full trailers.

How long do I keep the inspection report? Fourteen months from the date of the report, kept where the vehicle is housed or maintained.