US towing guide · Brake equipment
Trailer Brake Laws by State
Use this comparison to identify the likely rule type, then verify the current official code for your loaded trailer.
Updated 2026-08-12
| State | Planning summary |
|---|---|
| Alabama | 3,000 lb commonly cited threshold |
| Alaska | 4,500-5,000 lb commonly cited threshold |
| Arizona | 3,000 lb commonly cited threshold |
| Arkansas | 3,000 lb commonly cited threshold |
| California | 1,500 lb commonly cited threshold |
| Colorado | 3,000 lb commonly cited threshold |
| Connecticut | 3,000 lb commonly cited threshold |
| Delaware | 4,000 lb commonly cited threshold |
| Florida | 3,000 lb commonly cited threshold |
| Georgia | 3,000 lb commonly cited threshold |
| Hawaii | 3,000 lb commonly cited threshold |
| Idaho | 1,500 lb commonly cited threshold |
| Illinois | 3,000 lb commonly cited threshold |
| Indiana | 3,000 lb commonly cited threshold |
| Iowa | 3,000 lb commonly cited threshold |
| Kansas | Performance / configuration rules; no single simple threshold |
| Kentucky | Performance / configuration rules; no single simple threshold |
| Louisiana | 3,000 lb commonly cited threshold |
| Maine | 3,000 lb commonly cited threshold |
| Maryland | 3,000 lb commonly cited threshold |
| Massachusetts | Performance / configuration rules; no single simple threshold |
| Michigan | 3,000 lb commonly cited threshold |
| Minnesota | 3,000 lb commonly cited threshold |
| Mississippi | 2,000 lb commonly cited threshold |
| Missouri | 3,000 lb commonly cited threshold |
| Montana | 3,000 lb commonly cited threshold |
| Nebraska | 3,000 lb commonly cited threshold |
| Nevada | 1,500 lb commonly cited threshold |
| New Hampshire | 1,500 lb commonly cited threshold |
| New Jersey | 3,000 lb commonly cited threshold |
| New Mexico | 3,000 lb commonly cited threshold |
| New York | Performance / configuration rules; no single simple threshold |
| North Carolina | 4,000 lb commonly cited threshold |
| North Dakota | 3,000 lb commonly cited threshold |
| Ohio | 2,000 lb commonly cited threshold |
| Oklahoma | 3,000 lb commonly cited threshold |
| Oregon | Performance / configuration rules; no single simple threshold |
| Pennsylvania | 3,000 lb commonly cited threshold |
| Rhode Island | 4,000 lb commonly cited threshold |
| South Carolina | 3,000 lb commonly cited threshold |
| South Dakota | 3,000 lb commonly cited threshold |
| Tennessee | 3,000 lb commonly cited threshold |
| Texas | 4,500-5,000 lb commonly cited threshold |
| Utah | Performance / configuration rules; no single simple threshold |
| Vermont | 3,000 lb commonly cited threshold |
| Virginia | 3,000 lb commonly cited threshold |
| Washington | 3,000 lb commonly cited threshold |
| West Virginia | 3,000 lb commonly cited threshold |
| Wisconsin | 3,000 lb commonly cited threshold |
| Wyoming | 3,000 lb commonly cited threshold |
Showing all 50 states. Threshold descriptions are high-level and may have exemptions or additional conditions.
Why trailer brake laws cannot be reduced to one number
Some states use loaded gross weight, some use unladen weight or GVWR, and others use a stopping-distance or tow-vehicle-weight test. Requirements can also specify how many wheels or axles need brakes, driver control, breakaway activation and exemptions.
The table is a trip-planning index, not a legal determination. Verify the current code in every state on your route and follow the tow-vehicle and trailer manufacturer whenever it calls for brakes at a lower weight.
Brake controller and breakaway system
- Electric trailer brakes normally require a compatible controller in the tow vehicle.
- Many states require an automatic breakaway system once trailer brakes are required.
- Safety chains, lighting and inspection rules are separate from service-brake requirements.
- A trailer that is legal without brakes may still exceed the tow vehicle manufacturer recommendation.
Frequently asked questions
At what weight are trailer brakes required?
A 3,000-pound threshold is common, but state laws range lower or higher and some use performance tests rather than one weight number.
Does the law use actual weight or GVWR?
It depends on the state. The rule may use actual gross weight, unladen weight, registered weight or GVWR, so verify the statutory wording.
Do I need a breakaway switch?
Many states require automatic brake application if a brake-equipped trailer separates. Manufacturer instructions may also require it.
Can I rely on my home-state trailer law while travelling?
No. Equipment and road-use requirements can apply in the state where the trailer is being operated.
Related tools and guides
Official sources
Rules and penalties change. Confirm your situation with the issuing authority or a qualified professional before acting.