Should I combine my old 401(k)s into one account?

By Kaz · Published 28 September 2026 · How this site checks figures

Summary

Nothing in the tax rules stops you, and it doesn't have to be all or nothing: an old 401(k) that would lose something in an IRA can stay where it is while the others move. The IRS lists "fewer accounts to track" as one reason to consolidate, right next to questions about investment options and fees, so the count alone doesn't settle it. Where the tax rules do reward consolidation is once required minimum distributions begin, at age 73 under current rules and age 75 for anyone who reaches 74 after December 31, 2032. From then on, required minimum distributions from 401(k)s "must be taken separately from each of those plan accounts," while an IRA owner can add up the RMDs for each IRA and take the total from one of them.

Three rollovers in one year is fine

People who have heard of the once-a-year rollover limit sometimes plan to space their accounts out. There's no need. The IRS says the one-per-year limit "does not apply to" plan-to-IRA rollovers or plan-to-plan rollovers; it's an IRA-to-IRA rule. You can move three old 401(k)s in the same week.

You also don't have to move everything. Under the IRS rollover rules you can roll over "all or part of any distribution" from a retirement plan, so one account can be split, with some of it staying behind.

Accounts to hold back from the sweep

A plan from a job you left in or after the year you turned 55. The IRS table of exceptions to the 10% early-withdrawal tax marks "separation from service" as "yes" for qualified plans and "no" for IRAs. Once that money is in an IRA, the exception is gone.
A plan with a loan still outstanding. The plan may demand the rest of the loan when you leave, and whatever goes unpaid shows up as a distribution on Form 1099-R. To keep it from being taxed, the IRS allows that amount to be rolled over to an IRA or another plan by the due date, including extensions, of your federal tax return for the year it counts as a distribution.
A plan holding your employer's stock. Employer shares have their own tax treatment, known as NUA. When the shares come out of the plan in a lump-sum distribution, the IRS says the net unrealized appreciation "is generally not subject to tax until you sell the securities."

The Rule of 55 article covers how the age and the year you left fit together, the 401(k) loan article covers the deadlines, and the NUA article covers the stock.

If you want everything in your new employer's plan

That part isn't your call. The receiving plan decides whether it takes rollovers at all and "what type of contributions are accepted," according to the IRS, so its administrator is the person to ask. A plan-to-plan consolidation can end up half done, with pretax money going into the new 401(k) and something the plan won't take going to an IRA. The article on moving money into a new employer's 401(k) goes through the pretax, Roth, and after-tax cases.

Sources

Written by Kaz, an independent publisher.
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