What to Do With an Old 401k: Your 3 Choices Explained

Changed jobs and not sure what to do with an old 401k? You’re in good company. I’ve sat with more than one person who left an old account sitting at a former employer for years, not out of carelessness, but because figuring it out felt like one more thing on a very full plate. A new job, a move, a divorce, kids’ schedules: life doesn’t pause so you can read rollover forms. Just recently a client asked me this exact question about a 401(k) from a previous job, and said, in so many words, that they’d tried to look into it but it just wasn’t clear how to do it.

It isn’t clear, and that’s not your fault. So let’s walk through it plainly. When you leave an employer, you really have three good choices for that money. None is right for everyone, and each has trade-offs worth understanding. After that, I’ll cover how to move money the right way and the rules that keep you from a surprise tax bill.

A quick note before we start: I’m a CFP® professional, not a tax professional. This is general education, not tax or legal advice for your situation. Where taxes come into play, I’ll say so, and it’s worth a short conversation with a CPA or tax preparer.

This applies to most old employer “qualified” plans: a 401(k), a 403(b), and similar workplace accounts. I’ll say “401(k)” for simplicity.

What to do with an old 401k: your three real choices

Choice 1: Leave it in the old plan

If your balance is large enough, most plans let you leave your money right where it is, even after you’ve moved on.

Pros

• No paperwork right now. If life is overwhelming, doing nothing for a season is allowed. Your money stays invested and keeps its tax-deferred status.
• Possibly low costs. Large employers can negotiate institutional share classes with very low fees. If your old plan has good, inexpensive funds, staying put can be perfectly reasonable.
• Strong creditor protection. Employer plans covered by federal law (ERISA) generally have strong protection from creditors.
• Age-55 flexibility. If you left that employer in or after the year you turned 55 (age 50 for certain public safety employees), withdrawals from that plan generally avoid the 10% early withdrawal penalty. This flexibility applies only to the plan you left, so it’s generally lost if you move the money to an IRA or to a new employer’s plan. See IRS Topic 558, and check the details with your tax pro.
• Keeps a backdoor Roth simpler (see the backdoor Roth note below).

Cons

• Out of sight, out of mind. Old accounts get forgotten. Addresses change, statements go to old emails, and beneficiaries go out of date. I’ve seen ex-spouses still listed years later.
• Limited choices. You’re stuck with that plan’s menu, and you can’t add new money.
• Harder to coordinate. With accounts scattered across employers, it’s tough to see your whole picture or keep a sensible overall mix.
• The plan can change. Your old employer can switch providers, change funds, or raise fees, and you’ll find out by letter, if at all.
• Small balances may not be allowed to stay. Under current rules, plans may automatically cash out former employees with vested balances of $7,000 or less. Balances over $1,000 that are cashed out this way generally must be rolled into an IRA the plan picks for you if you don’t respond; $1,000 or less may simply be mailed to you as a check.

Choice 2: Roll it into an IRA

An Individual Retirement Account is an account you own and control, opened at the brokerage firm of your choice. This is the option that gives you the most freedom.

Pros

• Freedom of choice. This is the big one. Instead of a short list of funds, you can invest in nearly any mutual fund, index fund, ETF, individual stock, or bond the brokerage offers. You can build exactly the portfolio that fits your goals.
• You’re in control. No former employer can change your options. The account goes with you through every future job change.
• Consolidation. You can roll several old plans into one IRA and finally see everything in one place.
• Potentially lower costs. Many brokerages offer low-cost index funds and ETFs with no account fees.
• Often more flexible withdrawals. You can usually take money out when and how you choose, while some employer plans limit partial withdrawals.

Cons

• Freedom can be overwhelming. Thousands of choices can lead to paralysis, or to chasing whatever’s hot. Freedom works best paired with a plan.
• Costs vary widely. Low-cost ETFs are cheap; some products sold inside IRAs are not. Know what you’re paying.
• Different creditor protection. Rollover IRAs generally keep strong bankruptcy protection, but protection from other creditors depends on your state’s laws.
• No age-55 exception and no loans. IRAs don’t offer the age-55 separation rule or loans.
• Can complicate a backdoor Roth (see the note below).

Choice 3: Roll it into your current employer’s plan

If your new employer’s plan accepts incoming rollovers (often called “roll-ins”), you can move the old money there. Not every plan accepts them, so ask.

Pros

• Simplicity. One account, one login, one statement, alongside the money you’re already contributing.
• A shorter menu, and that might be perfectly okay. Most employer plans offer a curated list, often a couple dozen funds or fewer, often including a target-date fund that handles the mix for you. For many people, a few good, low-cost choices is a feature, not a flaw.
• Strong creditor protection under federal law.
• Keeps a backdoor Roth clean (see the note below).
• Possible loan access, if the plan offers loans (use with caution).
• The still-working exception. If you keep working past age 73, money in your current employer’s plan generally isn’t subject to required minimum distributions until you retire, unless you own 5% or more of the company. IRAs don’t get this. See the IRS RMD FAQs.

Cons

• Limited choices. If the menu is thin or expensive, you’re stuck with it.
• Check the fees. Some plans, especially some older 403(b) plans built around annuity products, carry higher costs. Compare before you move.
• You’ll likely do this again. If you change jobs in a few years, you’ll face the same decision.
• More paperwork up front. The receiving plan has its own forms and steps.
• Can give up age-55 access. If you left your old job in or after the year you turned 55, rolling into your new plan generally gives up the penalty-free access tied to the old plan.

Why cashing out isn’t really an option

There’s technically a fourth door, and it’s tempting when money is tight. But cashing out usually means paying income tax on the whole amount, plus a 10% early withdrawal penalty if you’re under 59½. On a $30,000 balance, losing 30% to 40% or more to taxes and penalties is common, depending on your tax bracket and state, and you lose all the future growth that money could have had. If you’re in a real pinch, let’s talk about other options first. If spending pressure is part of the story, my post on living paycheck to paycheck on a good income has five practical steps that help.

So which choice is best?

Honestly, it depends on you. If your current plan is solid and low-cost and you value simplicity, rolling into it is often a sensible choice. If you want full control and a wider range of investments, an IRA usually wins. And if your old plan is excellent, or you’re 55 or older, leaving it can be fine, as long as you keep an eye on it. The key is to compare fees and fund choices side by side before moving anything. Look at each fund’s expense ratio plus any plan or account administrative fees. For workplace plans, these appear on the plan’s annual fee disclosure (sometimes called the 404a-5 notice); for an IRA, check the brokerage’s fee schedule.

How to do a direct rollover, step by step

Here’s the process that keeps things clean. Each provider’s forms look a little different, but the steps are nearly always the same.

1. Contact the receiving account first. If you’re going to an IRA, open it first. If you’re going to your current employer’s plan, ask: “Do you accept incoming rollovers, and what are your instructions?” Get the exact name the check should be payable to (usually something like “[Provider] FBO [Your Name]”), the mailing address, any account or plan number to include, and whether they need a form from you.
2. Find out how your old money is split. Look at your old 401(k) statement to see whether you have pre-tax money, Roth money, or both. You’ll want each type to land in the matching type of account.
3. Contact your old 401(k) provider (online or by phone) and request a direct rollover. Tell them where it’s going and give them the payee name and address from step 1.
4. Watch for the check. Some providers send money electronically; others mail a check made out to the receiving account, sometimes to your home. If it comes to you, it’s still a direct rollover as long as it’s payable to the receiving account. Forward it promptly with any required form.
5. Confirm the deposit. Log in to the receiving account and confirm the full amount arrived and is labeled as a rollover, with pre-tax and Roth amounts in the right places.
6. Choose your investments. This is the step people forget. Rolled-over money may land in a default fund or a cash holding. Make sure it’s invested the way you intend.
7. Keep the paperwork. You’ll get a Form 1099-R for the year of the rollover. A direct rollover is generally not taxable, but it is reported, so hand that form to whoever prepares your taxes.

Staying within the rules (and avoiding unexpected taxes)

Rollovers are routine, but a few rules can turn a simple move into a surprise tax bill. Here’s what I want you to know, based on the IRS’s own guidance on rollovers of retirement plan and IRA distributions and Topic 413, Rollovers from retirement plans.

• Use a direct (trustee-to-trustee) rollover. The money goes from the old plan to the new account without ever being payable to you. That avoids the withholding and deadline issues below.
• The 20% withholding and 60-day trap. If the old plan pays the money to you instead, it’s required to withhold 20% for federal income taxes, even if you plan to roll it over (the IRS confirms this on its rollover pages). You then have 60 days to deposit the full amount, including the 20% that was withheld, which you’d have to make up from your own pocket. Whatever you don’t deposit in time is generally treated as taxable income, and may carry the 10% penalty if you’re under 59½.
• The once-per-12-months rule. You can generally do only one IRA-to-IRA rollover (where the money passes through your hands) in any 12-month period, counting all your IRAs together. This rule does not apply to plan-to-plan rollovers, plan-to-IRA rollovers, or trustee-to-trustee transfers, which is one more reason to keep things direct.
• Keep pre-tax with pre-tax and Roth with Roth. Pre-tax 401(k) money should go to a pre-tax 403(b) or traditional IRA; Roth 401(k) money should go to a Roth account. Moving pre-tax money into a Roth account is a taxable conversion, so mixing them up by mistake can create taxes you didn’t plan on.
• Roth 401(k) to Roth IRA: watch the five-year clock. For tax-free earnings, a Roth IRA has its own five-year rule. The years your money spent in the Roth 401(k) don’t count toward it. If you already opened any Roth IRA five or more years ago, the clock is measured from that earlier year. If this would be your first Roth IRA, the clock starts now. If you have after-tax (non-Roth) money in your old plan, it can often be split off and sent to a Roth IRA. See the IRS FAQs on designated Roth accounts and Publication 590-B.
• Outstanding 401(k) loans. If you had a loan from your old plan, leaving the job can trigger a “loan offset,” where the unpaid balance is treated as a distribution and can become taxable. The good news: when the offset happens because you left your job, the IRS generally gives you until your tax filing deadline (including extensions) for that year to roll over the offset amount with other money and avoid the tax. See the IRS page on plan loan offsets.
• Company stock: check before rolling. If your old 401(k) holds your former employer’s stock, pause before rolling it. There’s a special tax treatment called net unrealized appreciation (NUA) that may be lost once the stock is rolled over. This one is definitely worth a conversation with a tax professional first.
• Thinking about a backdoor Roth? If you’re a higher earner who might make backdoor Roth IRA contributions, pre-tax money sitting in a traditional IRA can make part of a later conversion taxable under what’s called the pro-rata rule. Rolling old pre-tax money into an employer plan, instead of an IRA, can sometimes keep this simpler. Talk to your tax professional before you decide.

For sure avoid:

• Cashing out the old account.
• Having the check made payable to you personally.
• Missing a 60-day deadline if money does pass through your hands.
• Rolling pre-tax money into a Roth account by accident.
• Forgetting an outstanding loan balance.
• Rolling company stock without checking on NUA first.
• Leaving rolled money sitting in cash, uninvested.
• Ignoring mail from your old plan about a small balance (see the automatic cash-out note in Choice 1).

Rules change and every situation is different, so please run your specifics past a tax professional before you move money.

A quick decision checklist

• Can’t find an old account? Contact the former employer’s HR department, check old W-2s and statements, or search the Department of Labor’s free Retirement Savings Lost and Found database.
• Find your latest old 401(k) statement: balance, vested amount, fees, and fund list.
• Note whether you have pre-tax money, Roth money, or both.
• Check for an outstanding loan or company stock.
• Ask your current employer’s plan whether it accepts roll-ins, and look at its fund menu and fees.
• If considering an IRA, compare a couple of brokerages for costs and investment options.
• Consider your age (55+ rules) and whether a backdoor Roth is in your future.
• Pick one of the three choices, and don’t cash out.
• If moving money: request a direct rollover, confirm the deposit, and get it invested.
• Update beneficiaries on every account you keep.

The bigger picture

To me, this is what stewardship looks like: not chasing the perfect fund, but gathering what you’ve been given, putting it in order, and making sure it keeps working for your family. Whether you’re starting over after a hard season or simply changed jobs, knowing where your money is and why it’s there is a quiet kind of peace.

If you’d like a second set of eyes

If you’d like help weighing these choices, I’m glad to help you think it through. For readers who’d rather not handle the paperwork themselves, Greenway Financial Planning can also help manage the rollover from start to finish. You can book a quick 15-minute intro call with an advisor who works only for you, with no commissions.

Full transparency: if you choose to have Greenway manage a rolled-over IRA, we’re paid an advisory fee on those assets, so we have an incentive to recommend a rollover. That’s why I’ve laid out all three choices honestly, including the ones that don’t involve us.

Not quite ready to talk? Start with my free Family Money Check-Up to get a clear picture of where your family stands.

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