Quick Answer
A TMS (transportation management system) is business software for booking loads, dispatching trucks, handling rate confirmations, and invoicing customers and settling with drivers. An ELD (electronic logging device) is the FMCSA-required device that records a driver's hours of service under 49 CFR Part 395, Subpart B. Most interstate carriers must run an ELD; a TMS is optional. Integrated, the ELD feeds location, available hours and miles into the TMS.
Key Takeaways
- A TMS manages freight and money: loads, dispatch, rate confirmations, documents, invoices and driver settlements. No federal rule requires one.
- An ELD records duty status for hours-of-service compliance, and a carrier that must use one may only use a device on FMCSA's registered list (49 CFR 395.22).
- Fleet management or telematics software sits between the two: GPS tracking, engine data, DVIRs, maintenance and safety.
- An ELD-TMS integration typically shares truck location and ETA, remaining drive hours, miles by state for IFTA, and DVIR status.
- A carrier may monitor productivity with ELD data but may not use it to push a driver into an hours-of-service or fatigue violation (49 CFR 390.36).
- Bills of lading, dispatch records and settlement sheets kept in a TMS can count as hours-of-service supporting documents (49 CFR 395.11).
“A TMS (transportation management system) is optional business software for booking loads, dispatch, rate confirmations, invoicing and settlements. An ELD is the FMCSA-required device that records hours of service under 49 CFR Part 395, Subpart B. Integrated, the ELD feeds location, available hours and miles into the TMS.”
What is a TMS in trucking?
A TMS runs the business side of moving freight, tracking each load from booking until the money is in the bank. In a small fleet, it replaces the spreadsheet, the whiteboard and the folder of PDFs.
A carrier TMS usually covers these jobs:
- Load planning and booking: entering loads from brokers, shippers or load boards, with pickup and delivery windows, rate and equipment.
- Dispatch: assigning a load to a truck, driver and trailer, and sending trip details to the driver.
- Rate confirmations: storing the signed rate con and matching it to the invoice so accessorials like detention and lumper fees don't get lost.
- Document management: collecting bills of lading, proof of delivery, scale tickets and receipts, often by driver photo upload.
- Invoicing and settlements: billing the customer or factoring company, and calculating driver pay by mile, percentage or flat rate.
Carrier TMS vs broker TMS
Both are called a TMS, but they solve different problems. A carrier TMS manages your own trucks and drivers and the loads they haul. A broker TMS manages shippers on one side and outside carriers on the other: quoting customers, vetting and onboarding carriers, sending carrier rate confirmations, tracking loads it doesn't control, and paying carriers.
If you own trucks, you want carrier features. If you also broker freight under separate broker authority, you will need broker features too.
What is an ELD, and is it required?
An ELD is a device and app connected to the truck's engine that records driving time automatically and logs the driver's duty status. The detailed rules are in 49 CFR Part 395, Subpart B, which applies to any ELD used after December 18, 2017. For the basics of what it records and how it works, see our guide to what an ELD is.
Under 49 CFR 395.8(a), a motor carrier must install ELDs and require drivers to use them. The main exceptions are drivers who keep logs on no more than 8 days in any 30-day period, certain driveaway-towaway operations, and vehicles manufactured before model year 2000 as shown by the VIN.
The carrier also owns the system's admin work. Under 395.22, you must create and deactivate ELD accounts, give each user a unique username, confirm each driver's license is valid and belongs to that driver, and keep a 6-month backup of ELD records on a separate device.
TMS vs ELD: what is the difference?
The short version: the ELD keeps you legal, the TMS keeps you paid.
TMS | ELD | |
|---|---|---|
Purpose | Run loads, dispatch, billing and pay | Record hours of service for compliance |
Required by law? | No federal requirement | Yes, for most carriers that must keep records of duty status (49 CFR 395.8) |
Who uses it | Owner, dispatcher, billing or office staff | Drivers, plus the carrier's safety or compliance staff |
Core data | Loads, customers, rates, documents, invoices, pay | Duty status, engine hours, miles, location, driver and vehicle IDs |
Examples of functions | Booking a load, sending a rate con, invoicing, driver settlements | Logging drive time, HOS alerts, log certification, roadside data transfer |
Who checks it | Your customers, factoring company, accountant | DOT officers at inspections and auditors in compliance reviews |
Both may show a truck on a map, but only a registered ELD produces a legal record of duty status.
What is TMS fleet management, and where do telematics fit?
People search "TMS fleet management" because the lines blur. Think of three layers:
- ELD (compliance layer): hours of service, required by law.
- Fleet management or telematics (equipment layer): GPS tracking, engine data, DVIRs, maintenance, fuel and safety cameras.
- TMS (business layer): loads, customers, dispatch, billing and pay.
In practice, small fleets often get layers 1 and 2 from the same provider, because the ELD device already reads engine data and GPS. Our guide to what fleet management is breaks that middle layer into its seven functions, and the fleet tracking system guide explains how GPS tracking works.
How does ELD TMS integration work?
An integration is a data connection, usually an API, between your ELD or fleet platform and your TMS. Without it, dispatch calls the driver for location and hours, and someone retypes miles every quarter. What syncs depends on both vendors, but these are the common data points:
Data from the ELD side | What the TMS uses it for |
|---|---|
Truck location and ETA | Load tracking, check calls and customer updates |
Available drive and on-duty hours | Deciding which driver can legally cover the next load |
Miles by state or province | IFTA reports and per-load mileage pay |
DVIR status | Holding a truck with an open defect off the dispatch board |
Odometer and engine hours | Maintenance scheduling and cost-per-mile reporting |
Driver and vehicle IDs | Matching the right truck and driver to each load |
Example: a broker offers a load picking up in Joliet at 6 a.m. tomorrow. Your dispatcher sees two trucks nearby, but one driver has 2 hours of drive time left on a 14-hour window that ends tonight. The integrated view shows the other driver is the legal choice before anyone calls.
Clean ELD miles by state also feed the quarterly return covered in our IFTA reporting guide.
Lucid ELD integrates with TMS platforms and with the Highway and MacroPoint networks, and its Enterprise+ plan adds API and custom integrations. Before buying any system, ask both vendors which fields actually sync today and how often.
What rules apply when ELD data flows into a TMS?
Sharing ELD data with dispatch is legal and common. A few federal rules still limit how you use it.
No harassment. Under 49 CFR 390.36, a carrier may not use information from an ELD, or technology tied to it, in a way it knew or should have known would cause a driver to violate the hours-of-service rules or drive while ill or fatigued. Monitoring productivity is allowed if it doesn't result in harassment. A driver can file a written complaint with FMCSA.
The driver controls edits. Under 49 CFR 395.30, the carrier can propose edits only after the driver submits the records, and the driver must accept or reject them. A carrier may not coerce a false certification, and nobody may alter or erase the original HOS data. A TMS showing a load as delivered at 3 p.m. is not a reason to change a driver's log.
Privacy. Section 395.22(i) requires carriers to keep ELD records in a way that protects driver privacy consistent with sound business practices. Limit who in the office can see full log history. FMCSA guidance also says the ELD rule does not require real-time tracking, though carriers may track trucks for business purposes.
Supporting documents. This is where a TMS helps compliance directly. Under 49 CFR 395.11, carriers must keep supporting documents that verify on-duty not driving time, including bills of lading, dispatch or trip records, expense receipts, fleet-management messages, and payroll or settlement sheets. A TMS record qualifies when it shows the driver or unit, date, location (nearest city or town) and time.
You need to keep no more than 8 supporting documents per driver per 24-hour period, including the earliest and latest. Drivers submit them within 13 days, and carriers keep them with the logs for 6 months (395.8(k)).
Do small fleets need a TMS?
An owner-operator with one truck and two regular brokers can run fine on an ELD, a load board account and a spreadsheet. Our guide to finding loads covers how most small carriers book freight before they need software for it.
Work through this list. If three or more apply, a TMS will likely pay for itself in time saved:
- You run 3 or more trucks, or plan to within a year.
- Someone other than the driver dispatches.
- You book more than about 15 loads a week across the fleet.
- Invoices go out late because paperwork is scattered across phones and email.
- You pay drivers by mile or percentage and settlements take hours each week.
- Brokers ask for tracking and you are making check calls by phone.
- You can't quickly say which lanes or customers make money.
If only one or two apply, get more out of your ELD and fleet dashboard first, and add a TMS when billing becomes the bottleneck.
Ask how Lucid ELD connects to your TMS
Educational content, not legal advice. Confirm requirements against current FMCSA regulations and your state's rules.
FAQ
Is a TMS the same as an ELD?
No. A TMS manages loads, dispatch, billing and pay. An ELD is a registered device that records hours of service to meet 49 CFR Part 395.
Can a TMS replace an ELD?
No. Only a device on FMCSA's registered ELD list can serve as your electronic record of duty status. A TMS can display HOS data it receives from an ELD, but it cannot be the ELD.
Is a TMS required by FMCSA?
No federal rule requires a TMS. The legal requirement is the ELD, plus keeping supporting documents, which a TMS can help organize.
Can my dispatcher see my hours of service?
Yes. Carriers may give dispatch access to ELD data and use it to monitor productivity. They may not use it to pressure you into an hours-of-service or fatigue violation under 49 CFR 390.36.
What is the difference between a carrier TMS and a broker TMS?
A carrier TMS manages your own trucks, drivers, loads and settlements. A broker TMS manages shippers and outside carriers, including carrier vetting, rate confirmations and carrier payments.
Have questions about connecting Lucid ELD to your TMS? Contact our team or compare plans.
