It is not commonly understood that most indoor plants do best when their roots are kept moderately potbound. That means many indoor plants, especially larger ones, may never need to be repotted.
My rule of thumb is that when a plant needs to be watered THOROUGHLY more than twice per week, then it is probably ready for a larger pot. As long as there is enough soil to keep the roots appropriately moist, then there is no compelling reason to repot. Repotting prematurely and incorrectly can cause serious problems.
