Trailer Tracking Software: How to Choose and Test It

Trailer tracking software shows where each of your trailers is, how long it has been there and whether that is a problem. It sits on top of a GPS device bolted to the trailer, and it is the part that decides whether anyone ever does something with the location.

Plenty of fleets own trackers and still cannot answer "which trailers are free?" without calling a driver. That is the gap this guide is about. It explains what the software has to do, what the main device types report, how to test a product before signing, and how to cost it. If you want the price side of GPS in general, our guide to the real cost of fleet GPS tracking covers tractors and subscriptions. This one stays on trailers.

What does trailer tracking software actually do?

A trailer tracking system has three layers. The device reports a position. The software stores those positions, draws them on a map and compares them with rules. The workflow decides who is told and what happens next. Most buying mistakes come from judging the first layer and assuming the other two come with it.

The rules are where the value sits. A map answers "where is it now?" A rule answers "which trailer has sat in one place past its limit?" Motive, for example, describes geofence alerts for when equipment leaves a perimeter, sent by email and limitable to a time window such as after hours, along with a utilization and dormancy report (Motive trailer tracking page, checked November 2, 2026). Samsara describes alerts by email or SMS when assets move outside designated areas (Samsara unpowered asset gateway page).

Notice what those pages leave out. Neither says what the alert triggers in your dispatch or yard process, because that depends on your own systems. That is the third layer, and it is why a TMS question belongs in a trailer tracking decision.

Which trailer tracking device types report how often?

Trailer tracking GPS devices fall into two families, and the check-in rate follows from the power source.

Battery devices are built for trailers that have no power for a tracker, such as dry vans and flatbeds that sit in yards. Motive says its Asset Gateway Mini has a five-year battery life with two daily location check-ins (Motive). Samsara lists typical battery life of 3 to 5 years at two check-ins per day, on three user-replaceable AA batteries, and notes that extreme temperature or weak cellular signal can shorten it (Samsara). Samsara adds that the default of two check-ins a day can be customized.

Powered or solar devices draw from the trailer's 7-way connector or a solar panel instead. Motive describes its Asset Gateway as running on a built-in solar panel or the 7-way connection, though that page gives no battery or check-in figure for it. Spireon says its FL Flex base unit can be configured with sensors and fitted with a solar panel, and does not state battery life or reporting intervals (Spireon trailer tracking page). None of these three pages lists a price. All three point you to a demo or a sales contact.

The practical reading: if a vendor will not put the check-in rate and the battery life in writing for the exact device quoted, treat the rate as unknown. Ask for it before you compare anything else.

How much does a slow check-in cost you?

Check-in frequency sets the longest time a trailer can be somewhere you do not know about. With two check-ins a day, the default both Motive and Samsara describe, spaced evenly (an assumption, since neither page says how they are spaced), the gap between known positions is 24 divided by 2, or 12 hours. A trailer can leave a yard just after one check-in and not be seen moving until nearly twelve hours later.

For a trailer that sits in a pool for days, that is fine. For a stolen trailer it is not. CargoNet, part of Verisk, counted 3,594 supply chain crime incidents in 2025 and estimated losses of nearly $725 million, up 60% from 2024, with an average value of $273,990 for thefts that reported a value (Fleet Equipment, January 28, 2026). The article we read does not break out trailer-only thefts, so we cannot tell you how many involved an empty trailer. It does tell you why a twelve-hour blind spot deserves a decision rather than a default.

The answer depends on the job. A trailer pool with a three-day dwell rule can live with two check-ins a day. A reefer with product on board, or a trailer parked somewhere you worry about, may need a faster rate or a powered unit. Ask what the faster rate does to battery life or the subscription, and get the answer in writing.

What does an idle trailer cost, and what does tracking cost against it?

Here is an example with invented inputs, built on a sourced rental rate. REPOWR reported that its average daily rate to lease a dry van rose to $19.42 in 2025, and that the average dry van lease ran 45 days (FreightWaves, December 23, 2025). Use it as a rough price of an idle day: what the trailer could earn if someone could find it and hand it over.

Say a fleet of 40 trailers (invented) finds that six dry vans sat unused in yards for 30 days each during the year because nobody could tell they were free. The tracker costs are invented placeholders, not quotes, because none of the vendor pages we read publish prices.

Line	Inputs (invented unless noted)	Result
Idle trailer days	6 trailers x 30 days	180 days
Rental ceiling	180 days x $19.42 (2025 REPOWR average, FreightWaves)	$3,495.60
Rental at half utilization	$3,495.60 x 50%	$1,747.80
Tracking cost, 5 years per trailer	$100 device + $5 a month x 60 months	$400
Tracking cost, 40 trailers per year	40 x $400 / 5 years	$3,200

The result is a sober one. Using the REPOWR rate, at the ceiling, six recovered trailers pay for the year of tracking ($3,495.60 against $3,200) with $295.60 to spare. At half utilization they do not ($1,747.80 against $3,200). Rental income alone does not justify tracking all 40 trailers on these invented numbers. What changes the answer is the rest of the list: pool detention you can dispute, theft you notice sooner, and the hours a dispatcher spends hunting. Your own numbers will differ, so replace each input with a real quote and a real idle-day count.

That is also the case for tracking only part of the fleet at first. Put devices on the trailers that move through pools and customer yards, where the dwell is, before the ones that live on your own lot.

Is the signal complete? A fleet-data check before you trust the map

Tracking data degrades quietly, and the dashboard rarely says so. In carrier data we have looked at, one fleet saw the number of trailer devices reporting fall from 502 to 340 while truck location feeds were also failing for several fleets at once. The two turned out to be unrelated. It would have been easy to blame the wrong cause for that drop.

The lesson is to track the count of reporting devices as its own number. Ask each vendor for a list of devices that have not checked in for a set number of days, and who gets that list. A trailer that has silently stopped reporting looks, on a map, exactly like a trailer that has not moved.

What should you ask a trailer fleet tracking vendor?

Use these questions in a demo, with your own trailer numbers and your own yard addresses loaded in.

• What are the check-in rate and the battery life for the exact device quoted, and what happens to both if I raise the rate?
• Can I draw a zone around each pool yard and set a limit in days, and who is alerted when a trailer passes it?
• Can a trailer that stopped reporting appear on a list by itself?
• What is the contract term, and what does a replacement cost when a device fails or goes missing?
• Can I export position history for a trailer, for a detention dispute or an insurance claim?
• Who owns the data if I leave?

Also ask how trailer identity is held. Large brokers sometimes pre-assign a trailer number inside the EDI 204 load tender, and many systems parse it and throw it away, so dispatch cannot see which trailer the broker expects. A tracker that knows where trailer 4417 is helps less if your load record does not say whether 4417 was the one the broker asked for.

How does this connect to a TMS?

A tracking tool that lives in its own tab creates a second place to look. The better test is whether the trailer's location and dwell appear where dispatch already works, on the load and the equipment record, so the question "which trailer can I send?" has one answer.

That matters most for the fleets that can least afford a trailer manager. A small carrier running drop-and-hook freight can end up with more trailers than tractors, and ATRI put the industry-average cost to operate a truck at $2.336 per mile in 2025, the highest in the report's history (ATRI, July 15, 2026). An idle trailer is a cost that keeps running while it sits. Our overview of load tracking software covers the load side of the same visibility problem.

Where does Hemut fit?

Hemut Command is a TMS built for asset-based trucking carriers. For carriers that run trailer pools, Hemut can track those pools: where trailers sit and how long they have been there against a pool SLA. That is the question the example above turned on.

Hemut also includes playbooks, ready-made automations a carrier can switch on, aimed at the trailer problems this guide describes. Examples are "Go recover a trailer that's sat too long," "Flag a trailer that moved when it shouldn't have," "Flag a tractor that's left its trailer behind," and "Zone Sentinel: catch a trailer overstaying its pool SLA." We do not claim numbers from them here, and any carrier should run them against its own trailers before relying on them. Ask in a demo which trailer location sources a carrier's own devices can use.

That is a fair thing to weigh, and the way to weigh it is a trial on your own trailers: the free trial runs 30 days with no credit card and no load limit. See the pricing page for plan prices.

Your trailer tracking checklist for this week

1. Count your trailers, then note when and by whom each was last seen. Put anything unseen for over a week on a search list.
2. Pick your three highest-dwell locations (customer yards and pools) and note the free time each allows.
3. Price an idle day using a real rental quote for your market, then multiply by the idle days you can count.
4. Get the check-in rate and battery life in writing for every device you are quoted, and decide what blind spot you can accept.
5. Run one vendor demo with your own trailer numbers and pool zones loaded.
6. Name the person who receives a dormancy or stopped-reporting alert, and what they do in the first hour.
7. Re-check the count of reporting devices every month.

Frequently asked questions

What is trailer tracking software?

It is software that stores and displays the positions reported by trackers on trailers, and applies rules such as geofences and dwell limits. The device supplies location; the software supplies the alerts and history.

How often does a trailer tracker report its location?

For battery models, two check-ins a day is the default Motive and Samsara describe, and Samsara says it can be customized. Powered and solar units can differ, so ask each vendor.

How long does a battery trailer tracker last?

Motive lists five years for its Asset Gateway Mini at two daily check-ins. Samsara lists typically 3 to 5 years at two check-ins per day, shortened by extreme temperature or weak signal.

Do I need a trailer tracking system for a small fleet?

Not necessarily for every trailer. Start with the trailers that sit in pools and customer yards, where dwell and loss risk are highest, and expand if the alerts pay for themselves.

How much does trailer fleet tracking cost?

The vendor pages we read for this article do not publish prices, so ask for quotes. Our table uses invented placeholders to show the method, not a market price.