Changing jobs is exciting, stressful, and busy — which is exactly why so many people forget about their old 401k. It just sits there with a former employer while you focus on the new role. Months turn into years, and suddenly you have two or three old accounts scattered across companies you barely remember.
A 401k rollover is the process of moving that money into a new account — cleanly, without taxes or penalties — so it keeps growing and you stay in control of it. This guide walks through every step.
What Is a 401k Rollover?
Quick Answer: A 401k rollover is when you transfer the money in an old 401k into a new retirement account — either a new employer's 401k plan or an Individual Retirement Account (IRA). Done correctly (as a direct rollover), no taxes are withheld and no penalties apply. The money moves from one tax-advantaged account to another without interruption.
Your Options When Leaving a Job
When you leave an employer, you have four options for your 401k:
- Leave it with your old employer — Most plans allow this if your balance is above $5,000. The money stays invested, but you have no ability to contribute and may have limited investment options.
- Roll it over to your new employer's 401k — If your new employer's plan accepts rollovers, this consolidates everything in one place.
- Roll it over to an IRA — Gives you the widest investment choices and full control. This is the most common choice for people who want flexibility.
- Cash it out — Triggers income tax plus a 10% early withdrawal penalty if you're under 59½. This is almost always the worst option. See the full 401k withdrawal rules before going this route.
Direct Rollover vs. Indirect Rollover
This distinction is critical — confuse them and you could accidentally trigger a big tax bill.
| Feature | Direct Rollover | Indirect Rollover |
|---|---|---|
| How it works | Funds go straight from old plan to new plan | Funds paid to you, then you deposit them |
| Tax withheld? | No | Yes — 20% withheld automatically |
| Time limit | None (it's immediate) | Must re-deposit within 60 days |
| Penalty risk? | None | High if you miss the 60-day window |
| Recommended? | Yes — almost always | Use only as a last resort |
With an indirect rollover, your old employer withholds 20% for taxes. To avoid a taxable event, you must deposit the full original amount (including the 20% that was withheld) into the new account within 60 days — using your own money to make up the difference. If you don't, that 20% becomes a taxable distribution.
Always request a direct rollover to avoid this entirely.
Step-by-Step: How to Roll Over Your 401k
1. Decide where the money is going
Figure out whether you're rolling into a new employer's 401k or an IRA. If it's a new 401k, check that the plan accepts incoming rollovers — not all do. If it's an IRA, choose a provider and open the account first.
2. Contact your old plan administrator
Call or log in to your old employer's 401k provider. Tell them you want to initiate a direct rollover. They'll ask where to send the funds and will provide the necessary paperwork or online process.
3. Provide the receiving account details
Give your old provider the account number and routing information for the new plan or IRA. If rolling into a new employer's 401k, get these details from your HR team or new plan provider.
4. Confirm the transfer
The old provider will either send the funds electronically or by check made out to the new plan (not to you). Either way, no taxes should be withheld. Confirm the timeline — transfers typically take 3–10 business days.
5. Re-invest the funds in your new account
Once the money arrives in the new account, it often sits in a default money market fund. Log in and choose your investment allocations. Don't leave it in cash — get it invested so it starts working again.
6. Keep the tax forms
You'll receive a Form 1099-R showing the distribution from your old plan, and a Form 5498 confirming the contribution to the new account. You'll need to report the rollover on your tax return, even though it's not taxable. Keep these with your tax records. The tax forms guide explains exactly how to handle these.
Rolling Into an IRA vs. a New 401k — Which Is Better?
IRA advantages: Broader investment options, easier to manage, more provider competition, no plan-specific rules
New 401k advantages: Protection from creditors (stronger under ERISA), ability to borrow against it, possible access to institutional-rate funds
Roth consideration: If rolling a traditional 401k into a Roth IRA, it's a taxable conversion — plan for the tax bill. Compare your options with our Roth vs traditional 401k comparison.
What About Vesting Before You Roll Over?
You can only roll over money that's fully vested. Your own contributions are always 100% vested, but employer match contributions vest on a schedule. If you haven't met your employer's vesting requirements, you'll only roll over your portion — the unvested employer contributions stay behind. Learn more about how 401k vesting schedules determine what's yours before you leave.
Conclusion
A 401k rollover is a straightforward process when done right — and the direct rollover method makes it almost entirely risk-free. The key is to act intentionally rather than leaving old accounts scattered and forgotten.
If you have money in an old 401k right now, the best time to roll it over is before you forget the login details and the old HR team is harder to reach. A few phone calls today protects years of retirement savings.
Frequently Asked Questions
How long do I have to roll over a 401k after leaving a job?
For an indirect rollover (where a check is made out to you), you have 60 days to deposit the funds into a new retirement account or it becomes a taxable distribution. For a direct rollover (account to account), there's no time limit — but it's wise to act within a few months so funds don't sit in a mismatched investment.
Is a 401k rollover taxable?
A direct rollover from a traditional 401k to another traditional 401k or traditional IRA is not taxable. You do need to report it on your tax return, but no tax is due. Rolling a traditional 401k into a Roth IRA is a conversion and is taxable in the year it occurs.
Can I roll over a 401k while still employed?
Generally no — 401k plans don't allow in-service rollovers unless you're 59½ or older. Some plans allow it earlier under specific rules. Once you leave the employer, the rollover option opens up.
What happens to unvested employer contributions when I roll over?
Unvested employer contributions stay with the plan — you forfeit them when you leave. Only your own contributions and vested employer contributions can be rolled over. Always check your vesting status before leaving a job.
