|Is there an age limit on who can be a beneficiary of a 529 plan?|
There is no beneficiary age limit specified in Section 529, but a few states do impose one. You'll need to check the requirements of each plan you're considering.
Also, keep in mind that several states require that the account be open for a specified minimum length of time before funds can be withdrawn. Otherwise, a fee or penalty may be imposed by the state. This is important if you expect to make withdrawals quickly because of the beneficiary's age.