How long do you have to keep supporting your child?

The law in Michigan isn't like this, but in other states, non-custodial parents are required to support children past their 18th birthday. See article here. Contrary to this,Michigan law says that a child support obligation ends when the child reaches 18 (or up to 19 1/2 depending on whether that child graduates from high school in their 18th year), marries, or becomes emancipated.