Rolling over a 401(k) plan from an old employer is easy. Contact the plan sponsor of both the new and old company and they can often manage the rollover directly. If you want to roll it over to an IRA, you can also contact the IRA sponsor (e.g., your broker). In some cases, the old plan sponsor will send you a check in the amount of the 401(k), which you must submit to your new plan within 60 days in order to maintain the tax benefits.