What is the 80% rule for towing?


Editorial team Published on

The 80% rule for towing is a safety guideline that suggests keeping your total loaded trailer weight at or below 80% of your vehicle's maximum rated towing capacity.

Why the 80% Rule Exists

  • Factory ideal conditions: Maximum tow ratings assume a brand-new vehicle, a flat road, calm wind, and a light driver. Real-world driving involves hills, wind, heat, and traffic.
  • Added safety margin: Staying under 80% gives you extra stopping power, easier acceleration up steep hills, and better control against crosswinds.
  • Less wear and tear: Pulling lighter than the max rating reduces stress on your truck's engine, transmission, brakes, and suspension over long distances.

How to Calculate It

  • Towing capacity: Multiply your vehicle's maximum tow rating by 0.80. If your truck can tow 10,000 pounds, your target limit is 8,000 pounds.
  • Payload capacity: The 80% guideline also applies to your vehicle's payload (the total weight of passengers, cargo, and the trailer's downward tongue weight on the hitch). You will often reach the payload limit before hitting the towing limit.