ELD (Electronic Logging Device)
An ELD is a federally required device that connects to your truck's engine and automatically records your driving hours, replacing paper logs.
What you actually need to know
Since the December 2017 FMCSA mandate, most interstate commercial drivers are required to use an ELD to log Hours of Service (HOS). The device plugs into your truck's diagnostic port, syncs with your phone or tablet running the ELD provider's app, and records your driving time, on-duty time, and rest periods automatically.
You can't pick any device. It has to be on the FMCSA's list of self-certified, registered ELDs. The list is public on fmcsa.dot.gov. Provider plans typically run $20–$40 per month per truck.
Exemptions exist for short-haul drivers operating within 150 air miles of their base, drivers of pre-2000 trucks, and a few other narrow cases. Most new owner-operators do not qualify for an exemption.
Common mistakes / confusions
- ELD is not the same as AOBRD (the older device class). AOBRD is no longer compliant.
- Switching ELD providers is allowed but you have to preserve the past 6 months of logs.
- During roadside inspection, you must be able to email or fax your logs on demand. Make sure your ELD app supports that.
Related terms
Where to go next
TruckStart is an educational tool, not a law firm, accounting firm, insurance agency, freight broker, or filing service. Always verify current requirements directly with FMCSA, your state, the IRS, and qualified professionals before making business decisions.