The average American changes jobs roughly 12.9 times over a career. Every one of those changes leaves behind a decision that's easy to defer indefinitely: what happens to the 401(k) at the employer you just left. According to recent research from Capitalize, there are now 31.9 million forgotten 401(k) accounts in the United States, holding a combined $2.1 trillion — an average of about $66,000 sitting in each orphaned account.
That's not a rounding error. It's tens of millions of people quietly carrying meaningful retirement savings in accounts they've stopped paying attention to, often at more than one former employer at once.
Why "leave it" isn't as neutral as it feels
Doing nothing feels like the safe, low-effort choice, and legally, it's a valid one — you're not required to move an old 401(k) anywhere. But a few practical problems tend to accumulate quietly:
- You lose track of the paperwork. Old plan administrators change record-keepers, merge, or get acquired. A decade later, tracking down an account you haven't touched can take real effort.
- You can't always keep contributing. Once you leave an employer, you typically can't add new money to that plan — it's frozen at whatever balance it had when you left.
- You're stuck with that plan's specific investment menu and fees. Some employer plans have excellent, low-cost fund options. Others are mediocre. You don't get to choose after you leave.
- Regulatory "help" has real limits. SECURE 2.0's auto-portability provision — designed to automatically move small balances into a new employer's plan — only applies to balances under $7,000. The average orphaned account, at roughly $66,000, is nearly ten times that threshold and requires you to act manually.
The four real options
1. Leave it where it is. Sometimes genuinely reasonable — if the old plan has unusually good, low-cost investment options, or if you're rolling into a new job soon and don't want to move money twice. The tradeoff is exactly the list above: it's easy to lose track of, and you can't add to it.
2. Roll it into your new employer's 401(k), if the new plan accepts incoming rollovers. This consolidates your retirement savings into one account with one login, one beneficiary designation to keep current, and one investment menu to manage — at the cost of being limited to whatever funds that plan offers.
3. Roll it into a Traditional IRA. This typically opens up a much wider universe of investment choices than any single employer plan offers, and consolidates old accounts from multiple former employers into one place. The one thing to check first: if you plan to use a backdoor Roth strategy in the future, having a large pre-tax balance in a Traditional IRA can complicate that conversion under the pro-rata rule.
4. Convert it to a Roth IRA. This triggers ordinary income tax on the converted amount now, in exchange for tax-free growth and withdrawals later. Whether this makes sense depends heavily on your current tax bracket versus your expected bracket in retirement — the same tradeoff at the heart of the Roth-versus-Traditional decision generally.
What you should almost never do is cash it out. An early withdrawal before age 59½ typically triggers ordinary income tax plus a 10% penalty — turning retirement savings into a same-year tax bill, on top of losing decades of future tax-advantaged growth.
The actual first step
Before choosing among these four, the practical first move is simply finding every old account — a task that's harder than it should be if you've changed jobs multiple times and don't remember every plan administrator. Old pay stubs, old benefits enrollment emails, and your own memory of past employers are the starting point; several free national databases also exist specifically to help track down unclaimed or forgotten retirement accounts.
None of the four options above is universally correct. But all four require you to actually know the account exists and make an active choice — which is exactly the step 31.9 million accounts are currently skipping.