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In Pennsylvania, child support usually terminates at age 18 or when the child graduates from high school (whichever is latest). However, Pennsylvania does allow a child or a parent to pursue a support order during college and the court may grant such an order if it deems proper to do so pursuant to 23 Pa. Cons. Stat. § 4327. Courts consider a variety of factors, such as the assets/incomes of the parents, whether a student is receiving loans or grants, willful estrangement between a parent and child after reaching adulthood, ability of a student to support himself, etc. In any case, if a parent of a child who has reached 18 and finished high school (or the home school equivalent) feels that support should terminate, he can petition the court and attempt to show the court that support should end or be reduced.

In the process of seeking modification, it's possible to ask the court to require the other parent to provide documentation pertaining to homeschooling to verify that a child is still attending school. Pennsylvania does not set an age limit if a child is enrolled in high school. However, if a child remains in high school too long, a parent may wish to take the matter to his attorney to see if there may be a basis to ask the court to terminate support if it appears that the child or the other parent is taking advantage of the system.