The weight capacity of a pontoon boat will depend on its size and construction materials. Generally, small pontoon boats that measure up to 20 feet can hold up to 2,500 pounds, while larger boats can hold up to 5,000 pounds or more. Pontoon boats are designed to be lightweight and easy to navigate in all types of water, making them ideal for carrying heavier loads. The draft of a pontoon boat also affects how much weight it can carry. With a full prop in the water, the draft can range from 16 to 24 inches, depending on the size of the boat, while the draft is much shallower (10 to 12 inches) when the prop is out of the water.