A driver logbook is a record of your driving hours, rest periods, and vehicle use that you keep either on paper or electronically

A logbook (also called a log or driver's log) documents when you drive, how long you drive, and how long you rest between driving periods. The logbook exists for two reasons: to protect you from driving while dangerously fatigued, and to give law enforcement and your employer proof that you followed the rules about how many hours you can drive in a day or week.

Whether you need a logbook depends on what you drive and who you work for. Commercial drivers operating trucks or buses over a certain weight threshold are required by federal law to keep logbooks. Some employers require logbooks even when the law does not. Owner-operators and small fleet managers often keep logbooks to track fuel costs, mileage, and maintenance schedules, even if they are not legally required to do so.

The logbook is not optional paperwork — it is a safety tool and a legal record. A missing or falsified logbook can result in fines, out-of-service orders, and loss of your commercial driving privileges.

Key Takeaways

  • Federal law requires commercial drivers of certain vehicles to maintain a logbook showing driving hours, rest periods, and vehicle information.
  • Logbooks can be kept on paper (RODS — Record of Duty Status) or electronically (ELDs — Electronic Logging Devices), with electronic versions now mandatory for most commercial operators.
  • Hours of Service (HOS) rules limit how many hours you can drive per day and per week, and your logbook proves you followed those limits.
  • Falsifying a logbook is a federal violation that can result in fines, vehicle impoundment, and suspension of your commercial driving privileges.
  • Even if you are not legally required to keep a logbook, doing so protects you by documenting your driving patterns and vehicle maintenance.

Who is required to keep a logbook

The Federal Motor Carrier Safety Administration (FMCSA) requires logbooks for drivers of commercial motor vehicles (CMVs) that meet certain criteria. A CMV is generally a vehicle with a gross vehicle weight rating (GVWR) of 10,001 pounds or more, or any vehicle carrying hazardous materials that require placarding. If you drive such a vehicle for compensation — whether you own it or work for a carrier — you must keep a logbook.

Some drivers are exempt from federal logbook requirements. These include drivers of vehicles under 10,001 pounds GVWR, drivers who operate only within a 100-air-mile radius of their home base and return home each day, and certain agricultural and utility vehicle operators. However, your state or your employer may impose logbook requirements even if federal law does not.

If you are unsure whether you are required to keep a logbook, check your vehicle's registration and GVWR, review your employment contract, and ask your dispatcher or fleet manager. It is better to keep a logbook when in doubt than to face a violation during a roadside inspection.

Paper logbooks versus electronic logging devices

Historically, drivers kept logbooks on paper forms called RODS (Record of Duty Status). These are still legal, but the FMCSA has required most commercial drivers to use ELDs (Electronic Logging Devices) since December 2019. An ELD is a device that automatically records your driving time, engine hours, and vehicle movement by connecting to your truck's engine computer.

An ELD syncs your logbook data to your carrier's system in real time, making it harder to falsify records and easier for inspectors to review your hours. You can still use paper RODS if you operate fewer than eight commercial vehicles, drive only occasionally, or operate vehicles manufactured before 2000 — but most drivers and carriers have moved to electronic systems.

The choice between paper and electronic is often not yours to make. Your employer will specify which system you use. If you own your own truck, you will need to purchase or lease an ELD that meets FMCSA standards. Common ELD providers include Samsara, Geotab, Verizon Connect, and Omnitracs. The cost typically ranges from $20 to $50 per month per vehicle.

How Hours of Service rules work with your logbook

Your logbook proves that you followed Hours of Service (HOS) rules, which limit how much you can drive without rest. The basic federal HOS rules are: you can drive a maximum of 11 hours after 10 consecutive hours off duty, and you cannot drive beyond the 14th hour after coming on duty (though you can take breaks that do not count as driving time). You must take a 30-minute break if you have driven for 8 consecutive hours without one.

In a seven-day period, you cannot drive more than 60 hours (or 70 hours if you operate on an eight-day cycle). Your logbook records every minute of driving, on-duty time, off-duty time, and sleeper berth time so that inspectors and your carrier can verify you stayed within these limits.

Violating HOS rules is dangerous — fatigue causes crashes — and it is illegal. Your logbook is the evidence that either proves you followed the rules or shows that you did not. Falsifying your logbook to hide HOS violations is a federal crime that can result in fines up to $2,000 per violation and disqualification from driving commercially.

What information goes in your logbook

Your logbook must include your name, the vehicle's license plate and VIN, the carrier's name (if you are not an owner-operator), the date, and a breakdown of your duty status for each 24-hour period. Duty status has four categories: off-duty (not working), sleeper berth (resting in the truck), on-duty not driving (paperwork, inspections, loading), and driving.

If you use an ELD, the device captures most of this automatically. If you use paper RODS, you fill in the form by hand, marking each hour with the appropriate duty status. You must also record the total miles driven, the vehicle odometer reading at the start and end of your shift, and the name of any co-driver.

Some carriers require additional information: fuel costs, maintenance performed, shipper and receiver names, or cargo weight. These are not federal requirements, but your employer can ask you to track them. Your logbook is a legal document, so entries must be accurate and made in real time or as close to real time as possible. Backdating or altering entries is falsification.

What happens during a logbook inspection

During a roadside inspection, a law enforcement officer or FMCSA inspector will ask to see your logbook. They will review the past seven to eight days of records to check that your driving hours, rest periods, and vehicle information are complete and accurate. If you use an ELD, they will plug in a portable reader to read your data. If you use paper RODS, they will examine the forms themselves.

Inspectors look for patterns that suggest falsification: entries that do not match your vehicle's GPS data, logbook entries that conflict with fuel receipts or shipper records, or duty status changes that do not align with the time of day. If an inspector finds violations, they may issue a citation, place you out of service (meaning you cannot drive until the violation is corrected), or impound your vehicle.

Minor errors — a missed entry, a small discrepancy in mileage — may result in a warning. Serious violations, such as driving 16 hours in a day or falsifying records, can result in fines of $500 to $2,000 per violation, disqualification from driving commercially, and criminal charges if the falsification is deliberate.

Best practices for keeping an accurate logbook

If you use paper RODS, fill in your logbook at the end of each day while the information is fresh. Use a pen, not a pencil, and do not use white-out or erasers — if you make a mistake, draw a single line through the error and initial it. Keep your logbook in your vehicle at all times and present it when ready when asked by an inspector.

If you use an ELD, make sure the device is properly installed and calibrated. Check that your driving time is being recorded correctly and that your personal conveyance (driving to or from a shipper, or driving a personal vehicle off-duty) is marked correctly so it does not count against your HOS. Review your logbook weekly to catch errors before they become violations.

Whether you use paper or electronic, do not falsify your logbook to hide HOS violations. The short-term gain is not worth the legal and safety consequences. If you are running out of hours, stop and rest. If you need to adjust your schedule, talk to your dispatcher. Your logbook is a record of your compliance with the law — keep it honest.

Frequently Asked Questions

What happens if I lose my logbook or ELD data?

If you lose paper RODS, you must reconstruct your logbook as accurately as possible using receipts, fuel records, and other documentation. If your ELD fails, you must switch to paper RODS when ready and notify your carrier. You have a grace period to repair or replace the device, but you cannot drive without a logbook. Contact your ELD provider or carrier for guidance on how to proceed.

Can I use my phone or personal device as a logbook?

No. Your logbook must be either a paper RODS form or an FMCSA-certified ELD. Your phone or a generic app does not meet federal standards and will not be accepted during an inspection. If you are required to keep a logbook, you must use an approved method.

Do I have to show my logbook to a police officer who pulls me over?

Yes. If a law enforcement officer or FMCSA inspector asks to see your logbook, you must produce it. Refusing to show your logbook is a violation and can result in a citation and out-of-service order. Keep your logbook accessible in your cab at all times.

What is the difference between on-duty not driving and sleeper berth time?

On-duty not driving is time you spend working but not driving — loading cargo, doing paperwork, or performing vehicle inspections. Sleeper berth is time you spend resting in the truck's sleeper cab. Both count as off-duty time for HOS purposes, but they are recorded separately in your logbook so inspectors can see how you spent your time.

Can my employer require me to falsify my logbook?

No. Falsifying a logbook is illegal, and your employer cannot ask you to do it. If your employer pressures you to falsify records or drive beyond HOS limits, you can report the violation to the FMCSA or your state's motor carrier safety office. You have the right to refuse unsafe or illegal orders without fear of retaliation.