What a truck driver logbook is and why you need one

A truck driver logbook is a record of your driving time, on-duty time, off-duty time, and sleeper berth time. The Federal Motor Carrier Safety Administration (FMCSA) requires most commercial truck drivers to keep one because hours-of-service rules exist to prevent driver fatigue and protect public safety. Your logbook proves you are following those rules.

You must maintain a logbook if you drive a commercial motor vehicle (CMV) — generally a truck with a gross vehicle weight rating (GVWR) over 10,001 pounds — across state lines or for a for-hire carrier. Some intrastate drivers and certain agricultural or short-haul operations have exemptions, but if your employer requires a logbook, you follow the same rules as everyone else.

The logbook itself can be paper or electronic. Paper logbooks are still legal, but most carriers now use electronic logging devices (ELDs), which automatically record your engine status and location. Either way, the information you record is the same.

Key Takeaways

  • Federal law requires most commercial truck drivers to record driving time, on-duty time, off-duty time, and sleeper berth time in a logbook.
  • You must fill out a logbook for each 24-hour period, and the FMCSA enforces strict rules about how many hours you can drive before taking a break.
  • Electronic logging devices (ELDs) are now standard at most carriers and automatically record when your engine is running, but you still control the status changes.
  • Falsifying a logbook — writing down hours you did not actually work or sleep — is a federal violation that can result in fines, out-of-service orders, and job loss.
  • Your logbook is a legal document that law enforcement and FMCSA inspectors can review at any roadside inspection or carrier audit.

The four status categories you record each day

Off-duty time is any period when you are not working and not in the sleeper berth — time at home, at a truck stop eating, or waiting for a load. This time does not count toward your driving or on-duty limits.

Sleeper berth time is time spent resting in the sleeper compartment of your truck. Under current rules, you can split your required 10-hour off-duty break into two periods: one in the sleeper berth (at least 8 hours) and one off-duty (at least 2 hours), or vice versa. The full 10 hours must be completed before you can drive again.

On-duty time includes any work that is not driving — fueling, inspecting your truck, loading or unloading cargo, talking to dispatch, or waiting for a load. This time counts toward your 14-hour window but does not count as driving time.

Driving time is any time the vehicle is moving on a public road. This is the most restricted category. You can drive a maximum of 11 hours after a 10-hour off-duty break, and you cannot drive past hour 14 of your on-duty window, even if you have not used all 11 driving hours.

How the 11-hour and 14-hour rules work together

The 11-hour driving limit and the 14-hour on-duty window are two separate rules that work at the same time. You get 14 consecutive hours to do all your work — driving and non-driving tasks — but only 11 of those hours can be spent actually driving. Once 14 hours have passed since your last 10-hour break, you must stop working, even if you have driving time left.

Example: You start your day at 6 a.m. after a 10-hour break. You drive for 6 hours, stop to fuel and inspect (1 hour on-duty), drive for 4 more hours, and wait for a load (2 hours on-duty). You have now used 10 driving hours and 13 on-duty hours. You can drive 1 more hour before hitting your 11-hour limit, but you can only work 1 more hour before hitting your 14-hour window. Either way, you must stop at 8 p.m.

There is also a 70-hour rule: you cannot drive if you have accumulated 70 hours of driving and on-duty time in the past 8 consecutive days (or 60 hours in 7 days if you do not run every day). Once you hit 70 hours, you must take a 34-hour break before your clock resets.

How to fill out a paper logbook correctly

Each page of a paper logbook covers one 24-hour period. At the top, you write the date, your name, your truck number, and your odometer reading at the start of the day. Then you draw a line graph showing when you were in each status — off-duty, sleeper berth, on-duty, and driving.

The graph has 24 hours marked horizontally and four rows for each status vertically. You shade or mark the hours you spent in each status. For example, if you slept from 10 p.m. to 6 a.m., you shade the sleeper berth row from 10 to 6. If you drove from 6 a.m. to noon, you shade the driving row from 6 to 12. The rows must account for all 24 hours with no gaps or overlaps.

At the bottom of the page, you list each trip — starting location, ending location, miles driven, and the time you started and stopped driving. You also note your odometer reading at the end of the day and certify that the information is accurate by signing the page. Some carriers require you to note your co-driver's name if you shared the truck.

Paper logbooks must be kept for the current day and the previous six days. After that, you can store them, but you must keep them for at least one year in case of an audit or inspection.

How electronic logging devices (ELDs) record your time

An ELD is a device that connects to your truck's engine and automatically records when the engine is running, when the vehicle is moving, and your location. You do not have to manually enter driving time — the device captures it. However, you still control your status changes by telling the device whether you are on-duty, off-duty, or in the sleeper berth.

When you start your shift, you log into the ELD with your driver ID and password. The device then tracks your engine status and movement. If the engine is running and the vehicle is moving, the time is recorded as driving. If the engine is running but the vehicle is not moving, you manually select whether that time is on-duty (fueling, inspecting, waiting) or off-duty (break time). When you are not in the truck, you mark yourself off-duty or in the sleeper berth.

The ELD stores all your data and transmits it to your carrier's server. Your carrier can review your logs in real time or after each day. Law enforcement can also access your logs at a roadside inspection using a portable reader. Most ELDs show your current status, remaining driving hours, and how much time is left in your 14-hour window on a small screen in your cab.

What happens during a roadside inspection or audit

A law enforcement officer or FMCSA inspector can pull you over and ask to see your logbook at any time. They will check that your hours are within legal limits, that your entries are legible and complete, and that your odometer readings match your reported miles. If you have an ELD, they will plug in a reader to read your records.

Inspectors look for violations such as driving more than 11 hours without a break, exceeding your 14-hour window, falsifying entries, or failing to record all your time. Minor violations — like a missing odometer reading or a small math error — may result in a warning. Serious violations — like driving 15 hours in a day or altering your logbook — can result in an out-of-service order (you cannot drive until the violation is fixed), a fine, or both.

Your carrier also conducts internal audits of your logbooks. If your carrier finds violations, they may retrain you, suspend your driving privileges, or terminate your employment. Repeated violations can affect your safety record and make it harder to find work at other carriers.

Common mistakes and how to avoid them

The most common mistake is not recording all your time. If you are awake and working, it must be on-duty or driving time — there is no third category. Many drivers forget to log time spent waiting for a load, talking to dispatch, or doing paperwork. That time is on-duty, even if you are not moving.

Another mistake is not taking a full 10-hour break before driving again. Some drivers try to split their break into two short periods without using the sleeper berth correctly. Remember: you need either 10 consecutive hours off-duty, or 8 hours in the sleeper berth plus 2 hours off-duty (in any order). Anything less is a violation.

Falsifying a logbook — writing down hours you did not actually work or sleep — is a federal crime. It is also the easiest violation for an inspector to catch. Do not do it. If you are tired, take a break. If you are behind schedule, that is a dispatch problem, not a reason to lie on your logbook.

Frequently Asked Questions

Can I drive if I have not slept a full 10 hours?

No. You must complete a 10-hour off-duty or sleeper berth break before you can drive again. You can split this into 8 hours in the sleeper berth and 2 hours off-duty, but both parts must be finished. If you have only slept 7 hours, you cannot drive until you have completed the remaining 3 hours.

What if I am stuck in traffic and my 14-hour window is about to expire?

You must stop driving when your 14-hour window ends, even if you are in traffic. Pull over safely and mark yourself off-duty. You cannot drive again until you have completed a 10-hour break. Traffic does not extend your window.

Do I need to record time spent at a truck stop eating or showering?

Yes. If you are awake and not in the sleeper berth, that time is off-duty. Off-duty time does not count toward your driving or on-duty limits, so it does not hurt you, but you must record it. Do not leave blank spaces on your logbook.

Can my carrier require me to falsify my logbook?

No. Falsifying a logbook is illegal, and your carrier cannot order you to do it. If a dispatcher or manager tells you to lie on your logbook, you can report it to the FMCSA or refuse. Retaliation for refusing an illegal order is also illegal.

What happens if I lose my paper logbook?

You must reconstruct it from your records — fuel receipts, dispatch notes, tolls, or anything that shows where you were and when. If you cannot reconstruct it accurately, you may face a violation. This is one reason why ELDs are safer: they automatically back up your data.