Exactly. In some states, CS ends at 18. In others, it extends to 21. Massachusetts and a few other states require the non-custodial parent to contribute to college costs. I personally think that’s a gross overstep on the part of the state as isn’t required of married couples. I plan to help my children with their college tuition but I don’t wish to be obligated for it. My daughters were 4 and 6 when my ex and I split. There’s too much that can happen between then and them going college. I could get sick or injured and not be able to work. Or, god forbid, one of the girls gets sick and requires the financial resources I would have devoted to tuition. It’s not ideal but they can always take out student loans.
In my state, either party can request a review of CS every 3 years. In all 50 states, CS is a simple calculation based off plugging each parents’ income into an online calculator. Extraordinary additional expenses are not part of that formula. Instead, they are determined by the court as needed. My children weren’t riding at the time of the divorce. I could certainly go back to court and ask for riding expenses to be split. It would be risky, though. My ex got fired from the job he had at the time of our divorce. He’s secretive about his current earnings, but I believe it to be only half of what it used to be. There’s a good chance that the judge would adjust the base CS downward if I hauled him into court to get horse money.