Terms of Use
Amounts can be left in the account for up to 30 days after the date the designated beneficiary turns 30. After this point, the distribution earnings would become fully taxable and a 10% penalty would apply. 

If the assets are not going to be used for the designated beneficiary after he or she attains age 30, the balance can be rolled over to a Coverdell Education Savings Account for another designated beneficiary who is a qualified family member under the age of 30.