The leading indicator of whether the change can be made is the age of the child. If the court feels they are young enough where the later added support will greatly benefit the child, they will allow it. But beware, once you graduate, your income will be imputed to what will then be known as your earning potential, and you will pay child support on that projected income, whether you are working or not. In my state, the minimum CS is around $250/month....at $350, I would tend to just leave it alone.