What a truck logbook is and why the government requires one

A truck 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 reduce crashes. The logbook proves you are following those rules.

If you drive a commercial vehicle that requires a Commercial Driver's License (CDL), you almost certainly need a logbook. The main exception is drivers of vehicles under 10,001 pounds gross vehicle weight rating (GVWR), though some states and specific carriers have their own rules. Your employer or dispatcher should tell you whether you are required to keep one.

Logbooks come in two forms: paper (the traditional method) and electronic (called an Electronic Logging Device, or ELD). The FMCSA has required most drivers to use an ELD since December 2019, though some drivers can still use paper under specific conditions.

Key Takeaways

  • The FMCSA requires most CDL drivers to record their driving time, on-duty time, off-duty time, and sleeper berth time in a logbook to enforce hours-of-service limits.
  • Electronic Logging Devices (ELDs) are now the standard method, though paper logbooks remain legal for certain drivers and situations under FMCSA exemptions.
  • Logbooks must be kept current and available for inspection by law enforcement or FMCSA officers, and violations can result in fines for both drivers and carriers.
  • Your carrier is responsible for ensuring you have the right equipment and training, but you are responsible for accurate entries and compliance with hours-of-service rules.

Hours-of-service rules that logbooks enforce

The logbook exists to track compliance with federal hours-of-service limits. For most drivers, the rules are: no more than 11 hours of driving in a 14-hour window, no more than 60 hours of on-duty time in 7 days (or 70 hours in 8 days if you run a 8-day cycle), and a mandatory 10-hour off-duty period before starting a new shift. These limits reset after you take a 34-hour break.

Your logbook shows which category you are in at any given time: driving, on-duty (not driving), off-duty, or sleeper berth. An ELD records these automatically based on engine status and vehicle movement. A paper logbook requires you to write them in manually, which is why accuracy and honesty matter — falsifying a logbook is a federal violation.

Different carrier types and routes have different rules. For example, some agricultural drivers, utility service drivers, and short-haul drivers (those operating within a 100-air-mile radius of their base) may be exempt or have modified rules. Your carrier should provide you with the specific rules that explore to your job.

Electronic Logging Devices (ELDs) versus paper logbooks

An Electronic Logging Device is a piece of hardware or software that connects to your truck's engine and automatically records your driving and on-duty time. It syncs with your carrier's system, making records available to dispatchers and compliance officers in real time. Most modern ELDs are smartphone apps or dashboard-mounted devices that require minimal manual input from you.

Paper logbooks require you to fill in each line by hand, noting the date, time, and category for each change in status. You must keep the current day's log with you and turn in completed logs to your carrier. Paper logs are harder to falsify in some ways (handwriting is traceable) but easier to misrecord by accident.

The FMCSA requires ELDs for most drivers, but exemptions exist. Drivers of vehicles manufactured before 2000, drivers on short-haul routes under 100 miles, certain agricultural and utility drivers, and drivers in their first year of operation may still use paper. Your carrier will tell you which method applies to you. If your carrier requires an ELD, they must provide it and train you on how to use it.

What you must record and how often

You must record your status for every change throughout the day. If you start driving at 6 a.m., stop for a break at 9 a.m., resume driving at 9:30 a.m., and finish at 5 p.m., your logbook shows four separate entries. Each entry includes the time, the status (driving, on-duty, off-duty, or sleeper berth), and the number of hours in that status.

You must also record vehicle information: the vehicle number or unit number, the odometer reading at the start and end of your shift, and the total miles driven. If you switch vehicles during a shift, you record that change. Your carrier's name, your name, your driver's license number, and the date must appear on every logbook page.

With an ELD, most of this happens automatically. You may need to manually confirm your status at certain points or add notes about vehicle changes, but the device records the time and calculates hours. With paper, you write everything in by hand. Either way, the logbook must be current — you cannot fill in yesterday's entries today.

Inspection, violations, and penalties

Law enforcement and FMCSA officers can inspect your logbook during a traffic stop or at a weigh station. They check whether your hours comply with federal rules, whether the logbook is current and legible, and whether the vehicle information is accurate. If you are found to be in violation, the officer issues a citation.

Common violations include falsifying a logbook (recording time you did not actually work), exceeding hours-of-service limits, failing to record all required information, and not having a logbook available for inspection. Penalties for drivers range from fines to out-of-service orders (you cannot drive until the violation is corrected). Your carrier can also face fines and may lose its operating authority if violations are serious or repeated.

Falsifying a logbook is a federal crime. It can result in criminal charges, not just civil fines. If you are pressured by a dispatcher or carrier to falsify your logbook, you have the right to refuse. The FMCSA and the Department of Transportation take this seriously, and whistleblower protections exist for drivers who report violations.

Your responsibilities and your carrier's responsibilities

You are responsible for keeping your logbook accurate and current, understanding the hours-of-service rules that explore to your job, and refusing to drive if you have reached your legal limit. You must have your logbook available for inspection and must not falsify it under any circumstances.

Your carrier is responsible for providing you with the right equipment (an ELD if required, or paper logs if exempt), training you on how to use it, monitoring your logs for compliance, and not pressuring you to violate hours-of-service rules. They must also keep copies of your logs for at least six months and make them available to regulators upon request.

If you believe your carrier is pressuring you to falsify logs or violate hours-of-service rules, you can report it to the FMCSA's Safety and Fitness Electronic Records (SAFER) system or contact the Federal Motor Carrier Safety Administration directly. You can also contact your state's labor department or a trucking industry union if you are a member.

Transitioning from paper to electronic logbooks

If your carrier is switching you from paper to an ELD, they must provide the device and training. The transition usually takes a few days to a week. You will learn how to log in, confirm your status, add notes, and access your records. Most ELDs have a learning curve, but they are designed to be simpler than paper once you are familiar with them.

During the transition, your carrier may run both systems in parallel for a short time so you can adjust. Ask your dispatcher or safety manager for hands-on training, not just a manual. If you have trouble with the ELD, report it to your carrier when ready — technical problems are not an excuse to falsify records, but your carrier should help you resolve them quickly.

If you switch carriers, your new carrier may use a different ELD system. Each system has slightly different steps, but the underlying rules are the same. Your new carrier must train you on their specific system before you start driving.

Frequently Asked Questions

Can I use my phone as an electronic logbook?

Yes, if your carrier provides an ELD app that meets FMCSA standards. Many carriers use smartphone apps instead of separate hardware devices. The app must connect to your vehicle's engine and automatically record your driving time. Your carrier will specify which app to use and how to install it.

What happens if I make a mistake on my paper logbook?

You must draw a single line through the error, write the correct information next to it, and initial and date the correction. Do not use white-out or erase. The correction must be visible and traceable. If you make multiple errors, your logbook may be flagged during an inspection, so accuracy matters.

Do I need a logbook if I only drive locally?

It depends on your vehicle's weight and your route. Drivers of vehicles under 10,001 pounds GVWR are generally exempt. Some short-haul drivers (operating within 100 air miles of their base) may also be exempt or use simplified records. Ask your carrier or check the FMCSA website for your specific situation.

Can my carrier require me to drive beyond my hours-of-service limit?

No. It is illegal for a carrier to require, permit, or pressure you to violate hours-of-service rules. If your dispatcher tells you to drive beyond your limit or falsify your logbook, you can refuse and report it to the FMCSA. Refusing an illegal order is protected.

How long must I keep my logbooks?

Your carrier must keep copies for at least six months. You should keep your own copies as well for your records. If you are involved in an accident or inspection, having your logbooks available can protect you if questions arise about your hours or compliance.