529 Plan: College Savings Plan. Saving money for college expenses is a goal I hear many young parents express, and one of the best ways to build tax-advantaged savings for college is the 529 plan. A 529 plan is a tax-advantaged savings plan designed to encourage saving for future college costs. 529 plans, legally known as “qualified tuition plans,” are sponsored by states, state agencies, or educational institutions and are authorized by Section 529 of the Internal Revenue Code.