A delay of 1 or 2 years shouldn't matter, but if your child postpones college indefinitely, you should read the details of the 529 plan. Look to see if the plan you own (or are considering) has any time limits. Most prepaid tuition plans require that the funds in the plan be paid out within 10 years of the date the beneficiary is scheduled to attend college. College savings plans generally have no such requirement, and in most states, money in the account can be left indefinitely.