A 401(k) rollover moves money from an employer plan into an Individual Retirement Account you control

When you leave a job, you have choices about what happens to the money in your 401(k). One option is to roll it into an IRA — a separate retirement account you open and manage yourself. The money moves directly from your old employer's plan to the new account, and you keep the same tax-deferred status. No taxes are owed on the transfer itself if you do it correctly.

A rollover is not automatic. Your former employer will hold the money until you decide what to do with it, and the longer you wait, the fewer options remain open to you. Understanding what a rollover actually costs, what it gives you, and what the alternatives are helps you make a decision that fits your situation.

Key Takeaways

  • A direct rollover moves money straight from your old 401(k) to an IRA without you handling the funds, which avoids tax withholding and penalties.
  • IRAs typically offer more investment choices and lower fees than employer plans, but you lose access to employer plan protections and borrowing options.
  • If you have after-tax contributions in your 401(k), a rollover becomes complicated and may trigger unexpected taxes unless you handle the pro-rata rule correctly.
  • Leaving money in your old 401(k) is sometimes the better choice if you have low-cost funds, plan to retire before 59½, or want to borrow against the account.
  • The rollover decision should account for your age, the size of the account, your investment knowledge, and whether you have other retirement savings.

How a direct rollover works and why it matters

A direct rollover means the money moves from your old plan administrator directly to your new IRA custodian. You never touch the money. This is the safest route because it avoids a 60-day deadline and automatic tax withholding.

If you take the money yourself instead — called an indirect rollover — your former employer withholds 20 percent for federal taxes. You then have 60 days to deposit the full amount (including the withheld portion) into an IRA, or the withheld money becomes taxable income and subject to a 10 percent early withdrawal penalty if you are under 59½. Most people cannot come up with the extra cash to cover the withholding, which turns a tax-deferred move into a taxable event.

To request a direct rollover, contact your former employer's benefits department or plan administrator. They will ask where you want the money sent — you need the name and address of the IRA custodian you have chosen (or plan to open). The process typically takes two to four weeks.

What you gain: investment choice and lower costs

An IRA gives you access to thousands of investments — individual stocks, bonds, mutual funds, exchange-traded funds, and other options — whereas most 401(k) plans limit you to 10 to 30 pre-selected funds. If your old plan's funds carried high expense ratios or poor performance, an IRA can reduce what you pay in fees over time.

IRA custodians vary widely in cost. Some charge no annual account fees, while others charge $25 to $100 per year. Some offer low-cost index funds with expense ratios below 0.1 percent; others push higher-cost actively managed funds. Comparing custodians before you roll over matters, because switching later is possible but adds friction.

You also gain flexibility in how you manage the account. You can rebalance whenever you want, move money between investments without restriction, and make changes without asking a plan administrator for permission. For people who want to take an active role in their retirement savings, this control is valuable.

What you lose: protections and borrowing options

401(k) plans offer legal protections that IRAs do not. Money in a 401(k) is protected from creditors in bankruptcy under federal law. An IRA has some protection, but it varies by state and is less comprehensive. If you work in a field with high liability risk or have significant debt, this difference matters.

A 401(k) also lets you borrow against your balance — typically up to 50 percent of the account or $50,000, whichever is less — and repay it over five years without tax consequences. An IRA has no loan option. If you think you might need to access your retirement money before 59½ for a major expense, a 401(k) is more flexible.

Additionally, 401(k) plans offer a rule called the Rule of 55: if you leave your job in the year you turn 55 or later, you can withdraw from that specific 401(k) without the 10 percent early withdrawal penalty. An IRA does not allow this. If you plan to retire at 55 or 56 and need to live on retirement savings before Social Security starts, leaving money in your 401(k) can save you thousands in penalties.

The pro-rata rule trap with after-tax contributions

If your 401(k) contains after-tax contributions — money you put in after paying income tax on it — a rollover triggers the pro-rata rule. This rule says that when you roll over any pre-tax money from any of your IRAs or 401(k)s, the IRS treats a proportional share of the rollover as after-tax money, and that portion becomes taxable.

Example: You have $100,000 in a 401(k) — $80,000 pre-tax and $20,000 after-tax. You also have a $50,000 traditional IRA from an old rollover. If you roll the 401(k) into the IRA, the IRS calculates that 20 percent of your total retirement savings ($30,000 out of $150,000) is after-tax. That means 20 percent of the $100,000 rollover — $20,000 — is treated as taxable income in the year you roll it over.

The only way to avoid this is to roll the after-tax portion into a Roth IRA (which accepts after-tax money) and the pre-tax portion into a traditional IRA. This requires separate rollovers and careful coordination. If you have after-tax contributions, consult a tax professional before rolling over, because the math can be complex and a mistake costs real money.

When leaving money in your 401(k) makes sense

A rollover is not always the right move. If your 401(k) has low-cost index funds, stable value funds, or other investments you are satisfied with, staying put avoids the hassle and keeps your money in a protected account. Some employer plans have institutional-class funds with expense ratios lower than what you would find in an IRA.

If you plan to retire before 59½ and need to live on your savings, the Rule of 55 makes a 401(k) valuable. Withdrawals from a 401(k) after you leave your job at 55 or older carry no 10 percent penalty, whereas IRA withdrawals before 59½ do (with narrow exceptions). This can save tens of thousands of dollars if you retire in your mid-50s.

If you have significant debt or work in a high-liability profession, the creditor protection of a 401(k) is worth keeping. If you think you might need to borrow against retirement savings for a major expense, a 401(k) loan is an option an IRA does not offer.

Steps to take before you decide

Start by reviewing your current 401(k) statement. Write down the fund names, expense ratios, and current balance. Then research what an IRA would cost you — compare at least three custodians on annual fees and the expense ratios of funds you would actually invest in. Calculate the difference over 10 years.

Check whether you have after-tax contributions in your 401(k). Your plan statement should show this, or you can ask your benefits department. If you do, get a tax professional involved before you roll over.

Consider your age and retirement timeline. If you are under 55 and plan to retire before 59½, the Rule of 55 matters. If you are 55 or older when you leave your job, you have more flexibility. If you are over 59½, early withdrawal penalties are not a concern.

Finally, think about your investment knowledge and how much time you want to spend managing your retirement account. An IRA requires you to choose investments and rebalance. A 401(k) requires less active management. If you prefer a hands-off approach, staying in your 401(k) or rolling into a target-date fund IRA might suit you better than picking individual investments.

Frequently Asked Questions

What happens to my 401(k) if I do not roll it over?

Your money stays in your old employer's plan. You can leave it there indefinitely if the balance is above a certain amount (usually $5,000). You continue to receive statements and can request withdrawals, but you cannot make new contributions. Some plans charge higher fees for former employees, so check your plan documents.

Can I roll over a 401(k) if I am still working at the company?

No. You can only roll over a 401(k) after you leave the job. Some plans allow in-service rollovers while you are still employed, but this is rare and requires specific plan language. Check with your benefits department.

How long do I have to complete a rollover after I leave my job?

There is no deadline for a direct rollover — you can do it months or years after you leave. For an indirect rollover, you have 60 days to deposit the money into an IRA or face taxes and penalties. Direct rollovers are safer because they have no time limit.

Will rolling over my 401(k) affect my taxes this year?

A direct rollover does not create a taxable event — no income is reported to the IRS. An indirect rollover can create taxes if you do not deposit the full amount within 60 days. After the rollover is complete, you pay taxes only when you withdraw money in retirement.

Can I roll over a 401(k) to a Roth IRA?

Yes, but you pay income tax on the entire amount in the year you roll it over. This is called a Roth conversion. It makes sense if you expect to be in a lower tax bracket now than in retirement, but it is a major tax event and should be planned with a tax professional.