Alabama trailer laws require every trailer used on a public road to carry an annual registration tag, and most trailers must also meet specific rules for lighting, brakes, safety chains, size, and weight. Heavier trailers face stricter equipment requirements, and a few rules — like who can ride inside a towed camper — catch owners off guard.
Register and Tag Every Trailer
Every trailer operated on Alabama highways must be registered through the county tag office and display a license plate. Registration renews each year. The fees are:
- $12 for a privately owned utility or travel trailer not used for hire
- $15 for a utility trailer rented or leased for compensation
- $20 for a truck, tractor trailer, or semitrailer
These are registration fees only. The county assesses ad valorem tax separately based on the trailer’s value.1Alabama Department of Revenue. Trailer
Not every trailer needs a certificate of title. Utility trailers, boat trailers, and bumper-pull trailers are exempt from titling.2Alabama Department of Revenue. What Vehicles Are Required to Be Titled in the State of Alabama? Any trailer, semitrailer, travel trailer, or collapsible camper more than 20 model years old is also exempt. That clock resets each January 1, so a 2006-model trailer becomes title-exempt starting January 1, 2027.3Alabama Legislature. Alabama Code Title 32-8-31 – Exemptions
Travel trailers, semitrailers, and gooseneck trailers 20 model years old or newer do need a title. Bring the previous title, or the Manufacturer’s Statement of Origin for a new trailer. A bill of sale is required either way, title or no title.3Alabama Legislature. Alabama Code Title 32-8-31 – Exemptions
Homemade Trailers
A trailer you build yourself needs a Vehicle Identification Number before it can be registered. If the trailer qualifies as a utility trailer, you assign the VIN yourself and take it to the county license plate office. For other homemade trailers that require a title, you file Form INV 26-1 with the Alabama Department of Revenue. The department mails you a VIN plate and a companion form, you attach the plate, take the trailer to a designated agent for inspection, and then apply for the title.
Lights and Reflectors
Every trailer must have at least one tail lamp showing a red light visible from 500 feet to the rear. The rear license plate must be lit by a white light readable from 50 feet.4Alabama Legislature. Alabama Code Title 32-5-240 – Required Lighting Equipment and Illuminating Devices of Vehicles
Beyond that baseline, the requirements split at 3,000 pounds of gross weight. Trailers at or below 3,000 pounds need two rear reflectors, one on each side. If the trailer’s load blocks the tow vehicle’s stop light, the trailer must also carry its own stop light.
Trailers over 3,000 pounds need considerably more:
- Two clearance lamps on the front, one on each side
- Two side marker lamps and two reflectors along each side, front and rear
- Two clearance lamps, two reflectors, and one stop light on the rear
All of this lighting must work whenever the tow vehicle’s headlamps or driving lamps are on.4Alabama Legislature. Alabama Code Title 32-5-240 – Required Lighting Equipment and Illuminating Devices of Vehicles A burned-out trailer tail light is one of the more common roadside citations, and it’s easy to prevent with a quick check before each trip.
Brakes, Breakaways, and Safety Chains
Trailers with a gross weight over 3,000 pounds must have brakes on all wheels.5Cornell Law School. Alabama Administrative Code Rule 770-X-10-.17-4-1-.11 – Brakes Required On All Wheels Those brakes must include a breakaway system that activates automatically if the trailer separates from the tow vehicle, and it must hold the brakes on for at least 15 minutes after separation.6Alabama Administrative Code. Alabama Administrative Code Rule 770-X-10-.17-4-1-.12 – Breakaway and Emergency Braking
Trailers at 3,000 pounds or less don’t need their own brakes, but the tow vehicle’s brakes still have to stop the combined rig safely.
Safety chains are required on all trailers. Cross them beneath the coupler and fasten them securely to the tow vehicle’s frame. Crossed chains form a cradle that catches the trailer tongue if the hitch fails, keeping the front of the trailer off the pavement.
Size and Weight Limits
Alabama caps trailer dimensions at:
- 13.5 feet in height, including the load7Alabama Legislature. Alabama Code Title 32-9-20 – Schedule of Restrictions
- 102 inches (8.5 feet) in width on roads with lanes at least 12 feet wide, or 96 inches (8 feet) on roads with narrower lanes8Alabama Administrative Code. Alabama Administrative Code Rule 450-3-1-.02 – Definitions
- 40 feet in length for a single vehicle, up to 57 feet for a truck tractor-semitrailer combination, and no more than 28.5 feet for each trailer in a tractor-semitrailer-trailer combination7Alabama Legislature. Alabama Code Title 32-9-20 – Schedule of Restrictions
No single axle may put more than 20,000 pounds on the road. The federal 80,000-pound gross weight cap applies on Interstate highways. Exceeding any dimension or weight limit requires an oversize or overweight permit from the Alabama Department of Transportation.7Alabama Legislature. Alabama Code Title 32-9-20 – Schedule of Restrictions
No Passengers Inside a Towed House Trailer
Alabama law prohibits anyone from riding inside a house trailer while it’s being towed on a public highway.9Alabama Legislature. Alabama Code Title 32-5A-55 – Riding in House Trailers “House trailer” here covers travel trailers and fifth-wheel campers. Some online charts list Alabama as allowing passengers in towed RVs, but the statute says otherwise. Everyone rides in the tow vehicle.
When You Need a CDL to Tow
Most people towing a utility trailer, boat trailer, or travel trailer with a pickup will never need a commercial driver’s license. Alabama follows the federal threshold: a gross combination weight rating of 26,001 pounds or more. Below that, a standard Class D license is enough.10FMCSA. CDL Requirement for Combination Vehicle with GCWR Less Than 26,001 Pounds
Two situations require a CDL no matter the weight: hauling placarded hazardous materials, and driving a vehicle designed to carry 16 or more people including the driver.11Alabama Law Enforcement Agency. Intrastate Commercial Vehicle Regulations
To check where you stand, add the tow vehicle’s GVWR from the driver’s door jamb sticker to the trailer’s GVWR stamped on its VIN plate or tongue. A half-ton pickup rated at 7,000 pounds towing a travel trailer rated at 8,000 pounds comes in at 15,000 pounds combined, well under the cutoff.
Insurance Gaps to Watch For
Your tow vehicle’s auto policy typically extends liability coverage to a properly attached trailer, so if the trailer causes damage to another vehicle or property, your liability should respond. That coverage does not protect the trailer itself.
If your trailer is damaged in a collision, stolen, or hit by a falling tree in the driveway, a standard auto policy generally pays nothing toward repair or replacement. Physical damage coverage for the trailer has to be added as an endorsement or bought as a separate trailer policy. For expensive travel trailers and fifth-wheels, total loss replacement coverage pays to replace a totaled trailer with a new equivalent rather than paying depreciated value.
Towing someone else’s trailer complicates things. Your liability coverage may still apply, but damage to the borrowed trailer itself usually isn’t covered without a non-owned trailer endorsement. And towing for hire falls outside personal auto insurance entirely, so a commercial policy is needed.