The answer is it depends on the size and location of the crack. Meaning, these factors can tell you if you need or not need to replace your window immediately.
If the crack is large, it’s time to consider a window replacement immediately. Remember that keeping a broken window in your home is not ideal because it poses a potential hazard to you and your family. For instance, broken glass can cause severe lacerations, especially if the shattered glasses are sharp and pointy. Not only that, but it would be easier for small animals to enter your home. In worst-case scenarios, it can lure burglars and other delinquent people. Therefore, consider window replacement as much as possible.