A Rollover IRA is a type of retirement account that lets you move money from an old employer-sponsored plan—like a 401k or 403(b)—into an IRA without paying taxes or penalties, as long as you follow certain rules. People often open a Rollover IRA when they change jobs or retire, so they can keep their savings growing tax-deferred in one place. This type of account gives you more control over your investments than most workplace plans, and you can choose to keep it as a Rollover IRA or combine it with a Traditional IRA if you prefer.