Rollover IRA

A Rollover IRA is a Traditional IRA used to hold money transferred from a qualified employer retirement plan — most commonly a 401(k), 403(b), or governmental 457(b) — rather than money contributed directly by the account owner. There's no separate IRS account category called a "rollover IRA"; it's the same Traditional IRA anyone can open, simply designated by the brokerage (and often kept separate) to reflect that its balance originated from a workplace plan rather than annual contributions.

Why keep rollover money separate at all, if it's legally just a Traditional IRA? Historically, mixing rollover money with regular annual IRA contributions could complicate rolling that money back into a new employer's plan later, because some plans only accepted rollovers from an account that held pure rollover money. Federal pension law changed years ago to remove that restriction for most plans, so commingling rollover and contributory money in one IRA is now generally fine from a tax-law standpoint. Even so, many people still keep them separate for cleaner recordkeeping — it's easier to track "this $180,000 came from my old 401(k)" than to untangle it from years of smaller annual contributions. Nothing limits you to one: a person who has changed jobs several times can hold several Rollover IRAs, or consolidate them, without tax consequence either way.

How the money gets there is a separate subject. A direct rollover moves it institution to institution; an indirect rollover routes a check through the account owner, which for an employer-plan distribution triggers mandatory federal withholding and starts a 60-day deadline. Those mechanics belong to the pages on each; what matters here is the account you end up holding.

And holding one has a consequence that is easy to miss and expensive to discover late: a pre-tax Rollover IRA balance is counted by the pro-rata rule, which is what breaks the backdoor Roth IRA. That rule aggregates every traditional, SEP, and SIMPLE IRA a person owns — measured by their combined December 31 balance — when it calculates the taxable share of a Roth conversion, and a Rollover IRA is a Traditional IRA, so its pre-tax balance sits in that pool. Someone with a substantial rollover balance who makes a nondeductible contribution and converts it cannot convert only the new after-tax dollars; the conversion comes out as a proportional blend of pre-tax and after-tax money, and with a large rollover balance most of it is taxable. The standard remedy runs the rollover backwards: employer plans are not counted in the pro-rata calculation, so rolling the pre-tax balance into a current employer's plan that accepts incoming rollovers — sometimes called a reverse rollover — takes it out of the pool and clears the way. Not every plan accepts roll-ins, so that's worth confirming before counting on it.

A hypothetical example: Dana holds $180,000 in a Rollover IRA from a job she left three years ago. She can leave the account exactly as it is, start adding regular annual IRA contributions to it, or open a second Rollover IRA when she leaves her current job — nothing in the tax code forces one account or forbids several, and the investment menu is whatever her brokerage offers rather than the handful of funds her old plan had.

Two things follow from what she decides. Keeping the account as pure rollover money preserves the cleanest path to moving it into a future employer's plan, since that's the confirmation some plans still ask for. And either way, that $180,000 is a pre-tax Traditional IRA balance for pro-rata purposes — so if Dana ever wants to make a backdoor Roth contribution, this account is what stands in the way, and rolling it into an employer plan that accepts roll-ins is the usual fix. (Illustrative numbers.)

Pros

• Typically unlocks a much wider range of investment choices than a workplace plan's limited fund lineup.
• Consolidates old employer accounts into one place that's easier to track and manage.
• Keeping the money separate preserves the option to roll it into a future employer's plan.

Cons

• Employer 401(k) plans sometimes offer institutional-priced funds or creditor protections a Rollover IRA doesn't automatically match.
• A pre-tax balance here counts under the pro-rata rule, which can make a backdoor Roth IRA mostly taxable for anyone who would otherwise use one.
• There is no such thing as a loan from an IRA, so the 401(k) loan feature doesn't carry over to the account the money lands in.