Funds that are left over in a 529 account after all college expenses have been paid go back to whom?

Any leftover funds in a 529 account after all qualified college expenses have been paid typically remain in the account and can be used for future educational expenses. The account owner can also withdraw the remaining funds, but they may incur taxes and penalties on non-qualified withdrawals. Alternatively, the funds can be transferred to another eligible family member's 529 account.