Your 401(k) stays in your name no matter what, but you need to decide what to do with it. When you leave a job, you generally have four options: leave the money in your former employer’s plan, roll it into an IRA, roll it into your new employer’s plan, or cash it out. Each path has different tax consequences, and the wrong move can cost you thousands in penalties and lost growth.
Leave It in Your Former Employer’s Plan
Most plans let you keep your 401(k) right where it is after you leave. Your money continues to grow tax-deferred, and you can still adjust your investments. The catch is you can no longer contribute to the account. This option works well if you like the plan’s investment choices or need time to figure out your next step.
If you go this route, stay on top of your account. Check periodically that your investments still match your goals, and verify whether the plan requires you to take a distribution by a certain date. It’s easy to lose track of an old 401(k), especially if you change addresses or phone numbers. Keep your contact information updated with the plan administrator.
There’s one situation where the choice may be made for you. If your balance is $7,000 or less and you don’t take action after receiving a notice, your former employer’s plan can automatically roll your savings into a Safe Harbor IRA. Under rules from the SECURE 2.0 Act, that money can then be automatically transferred to your new employer’s retirement plan if you have one, helping prevent small balances from getting lost or cashed out.
Roll It Into an IRA
Opening an IRA and rolling your 401(k) into it gives you full control over your investments. IRAs typically offer a much wider range of funds, stocks, and bonds than most employer plans, and you can open one at nearly any brokerage. A rollover IRA has the same tax-deferred treatment as your old 401(k), so you won’t owe taxes on the transfer as long as you do it correctly.
The cleanest way to move the money is through a direct rollover (sometimes called a trustee-to-trustee transfer), where your old plan sends the funds straight to your new IRA provider. If the plan instead mails a check to you personally, they’re required to withhold 20% of your balance for taxes. You then have 60 days to deposit the full amount, including that withheld 20% out of your own pocket, into a tax-advantaged account. If you miss that window, the IRS treats the money as a distribution, meaning income taxes plus a potential 10% early withdrawal penalty if you’re under 59½.
Roll It Into a New Employer’s Plan
If your new job offers a 401(k), you may be able to consolidate everything into one account. Check with your new employer first, since not all plans accept incoming rollovers. Combining accounts makes it simpler to track your retirement savings and manage your asset allocation in one place.
The same rollover mechanics apply here. Request a direct rollover so the funds go straight from your old plan to your new one without passing through your hands. This avoids the 20% withholding and the 60-day deadline pressure that come with an indirect rollover.
Cash It Out
You can withdraw the entire balance as cash. This is almost always the most expensive option. The distribution counts as taxable income in the year you receive it, which could push you into a higher tax bracket. On top of that, if you’re under 59½, the IRS charges an additional 10% early withdrawal penalty.
Here’s what that looks like in practice. Say you have $50,000 in your 401(k) and you’re 35 years old. If you cash out, you’ll owe federal income tax on the full $50,000 at your marginal rate, plus the 10% penalty of $5,000, plus any applicable state income tax. Depending on your bracket, you could lose $15,000 to $20,000 or more. You’re also giving up decades of tax-deferred compounding on that money.
What Happens to an Outstanding 401(k) Loan
If you borrowed from your 401(k) and still have an outstanding balance when you leave, your plan sponsor can require you to repay the full amount. The exact timeline depends on your plan’s rules, but many require repayment shortly after your last day.
If you can’t pay it back, the remaining loan balance is treated as a distribution. That means it becomes taxable income, and if you’re under 59½, you’ll also owe the 10% early withdrawal penalty on the unpaid amount. There is a way to avoid this: you can roll over all or part of that outstanding loan balance into an IRA or another eligible retirement plan. The deadline to complete this rollover is your federal tax return due date (including extensions) for the year the loan was treated as a distribution.
Vested vs. Unvested Money
Everything you personally contributed to your 401(k) is always yours. But employer contributions, such as matching funds, may be subject to a vesting schedule. Vesting is the process by which you earn full ownership of your employer’s contributions over time, typically over three to six years of service.
If you leave before you’re fully vested, you forfeit the unvested portion of employer contributions. Your own contributions and any earnings on them stay with you. Before you resign, it’s worth checking your vesting schedule. Sometimes waiting a few extra months can mean keeping thousands of dollars in matching funds you’d otherwise lose.
How to Decide
For most people, a direct rollover into an IRA or a new employer’s plan is the strongest move. You avoid taxes and penalties, keep your money growing, and maintain control over your investments. Leaving money in an old employer’s plan is fine temporarily, but consolidating accounts reduces the chance of losing track of your savings over a career that might span a dozen employers.
Cashing out should be a last resort. Even a modest 401(k) balance left invested for 20 or 30 more years can grow substantially. A $30,000 balance at age 30, earning an average 7% annual return, would grow to roughly $228,000 by age 60 without a single additional contribution. Cashing out trades that future security for a smaller, tax-reduced lump sum today.
Whatever you choose, act within a reasonable timeframe. Set a reminder to handle the rollover within your first few weeks at a new job, while the details are fresh and the paperwork is straightforward.