Tree Trimming, or pruning, eliminates dead or dying limbs and dangerous branches. Pruning also allows for healthy new growth and an aesthetic shape. Trimmers quote the cost of each tree separately, based on their hourly rate times their estimate of how long it will take. Typical costs: Assuming no buildings or utilities are nearby, a 30-foot high tree like a Black Mulberry, Dogwood or Russian Olive will cost $75-$437 to trim, depending on the type and condition of the tree. 1  A tree from 30-60 feet tall--including the Black Alder, Black Gum and Crabapple--in the same open area can run $150-$874.