1) Try not to rent on the last weekend of the month…it’s always busy. When that happens they increase the costs. A 16′ truck that normally rents for $29.00/.59 cents a mile will now rent for $49.00 and .79 cents a mile.

2) It costs more on Friday and Saturday. Try renting on other days.

3) Call all of the companies in your area. Budget, U-Haul, Penski. As you do, tell them that you already called <insert truck company here> and they offered you <insert quote here>. They will usually beat that price. Then call back the first company….and on and on. Make them compete for your business, and you could cut 50% off the cost of your rental.

Just note that U-Haul has the absolute worst customer service and worst trucks. Try to work with Budget if they will give you a good deal.
References :