Moving Money From an IRA to a 401(k): What You Need to Know

Yes, you can roll over an IRA to a 401(k), but your 401(k) plan has to allow it

A rollover means moving money from one retirement account to another without paying taxes on it at the time of the transfer. You can move money from a traditional IRA or a Roth IRA into a 401(k), but only if your employer's 401(k) plan permits incoming rollovers. Not all plans do. Before you start the process, contact your 401(k) plan administrator — usually your HR or benefits department — and ask whether they accept IRA rollovers and what paperwork they need.

The rules differ depending on whether you have a traditional IRA or a Roth IRA, and the tax consequences are different too. A traditional IRA rollover into a traditional 401(k) is straightforward. A Roth IRA rollover is more complicated because of how the IRS treats the two account types.

Key Takeaways

Your 401(k) plan must allow incoming rollovers before you can move money from an IRA into it — contact your HR or benefits department to confirm.
A traditional IRA can roll into a traditional 401(k) without tax consequences, but a Roth IRA rollover into a Roth 401(k) may trigger taxes depending on how much you earn.
The rollover must happen through a direct transfer between the two institutions, not through your own hands, or you risk losing the tax-deferred status.
Once the money lands in your 401(k), it follows 401(k) withdrawal rules, including the 10% early withdrawal penalty if you take it out before age 59½.

Traditional IRA to Traditional 401(k): The simpler path

Rolling a traditional IRA into a traditional 401(k) is the most straightforward scenario. Both accounts are funded with pre-tax dollars, so the IRS treats the transfer as a like-for-like move. You do not owe income tax on the money when it moves, and you do not owe tax on any growth it earned while sitting in the IRA.

The process works like this: you contact your IRA custodian (the bank or brokerage holding the account) and request a direct rollover to your 401(k). You provide them with your 401(k) plan's name, your account number, and the receiving institution's routing information. The IRA custodian sends the money directly to your 401(k) plan. This direct transfer is critical — if the money passes through your hands first, the IRS treats it as a distribution, and you have only 60 days to deposit it into the 401(k) or face taxes and penalties.

Roth IRA to Roth 401(k): Tax rules you need to know

Rolling a Roth IRA into a Roth 401(k) is more complex because the IRS cares about how long the money has been in Roth accounts. Roth accounts are funded with after-tax dollars, and the main benefit is that withdrawals in retirement are tax-free — but only if the account has been open for at least five years and you are at least 59½ when you withdraw.

When you roll a Roth IRA into a Roth 401(k), the five-year clock resets. The IRS starts counting from the date the money enters the 401(k), not from when you originally opened the Roth IRA. This matters if you are close to the five-year mark or if you plan to withdraw the money soon. Additionally, some Roth 401(k) plans require you to take required minimum distributions (RMDs) starting at age 73, whereas Roth IRAs do not. Before rolling over, understand what your specific 401(k) plan requires.

What happens to your money after the rollover

Once the money lands in your 401(k), it is no longer an IRA. It follows 401(k) rules, not IRA rules. That means you cannot withdraw it penalty-free before age 59½ — the 10% early withdrawal penalty applies. You also cannot take a loan against it unless your 401(k) plan specifically allows loans, which many do but not all.

Your investment choices also change. IRAs typically offer a wide range of investment options — individual stocks, bonds, mutual funds, exchange-traded funds. 401(k) plans usually limit you to a menu of mutual funds and target-date funds chosen by your employer. If you have money invested in individual stocks or specialized funds in your IRA, you will need to sell those positions and reinvest the proceeds in whatever your 401(k) offers.

The money in your 401(k) is also subject to required minimum distributions starting at age 73. If you leave your job and roll the 401(k) into an IRA later, you can avoid RMDs by rolling into a traditional IRA (though RMDs still explore at 73). This flexibility is one reason some people keep money in IRAs rather than rolling it into 401(k)s.

When a rollover makes sense

You might consider rolling an IRA into a 401(k) if you want to consolidate accounts and reduce the number of statements you receive. Fewer accounts can make record-keeping simpler, especially if you have multiple IRAs from previous jobs.

A rollover also makes sense if your 401(k) offers investment options you prefer over what your IRA custodian offers, or if your 401(k) has lower fees. Some employer plans have institutional-class mutual funds with lower expense ratios than retail versions available through IRA custodians.

Another reason is if you plan to use the 401(k) loan feature. IRAs do not allow loans, but many 401(k) plans do. If you need access to your retirement savings before 59½ and your plan permits loans, rolling an IRA into the 401(k) gives you that option.

When a rollover does not make sense

Do not roll an IRA into a 401(k) if you lose investment flexibility you need. If you hold individual stocks, real estate investment trusts, or other specialized investments in your IRA that your 401(k) does not support, you will have to liquidate them. That forces you to pay capital gains tax on any appreciation, which defeats the purpose of rolling over tax-free.

A rollover also does not make sense if your 401(k) has high fees or limited investment options. Some employer plans charge administrative fees or offer only high-expense mutual funds. In that case, keeping money in an IRA with a low-cost custodian is the better choice.

If you are close to retirement and plan to retire before 59½, think carefully before rolling an IRA into a 401(k). IRAs have a Rule of 55 exception that lets you withdraw money penalty-free at 55 if you leave your job. 401(k)s do not have this exception. Once money is in a 401(k), you cannot access it penalty-free until 59½ unless your plan allows loans.

The direct rollover process step by step

First, confirm with your 401(k) plan administrator that they accept IRA rollovers and what forms you need. Second, contact your IRA custodian and request a direct rollover. Provide them with the receiving 401(k) plan's name, your account number at the 401(k), and the custodian's routing and account information. Do not ask for a check made out to you — that triggers the 60-day rule and tax consequences.

The custodian will process the transfer, which typically takes one to two weeks. Once the money arrives at your 401(k), it will be invested according to your instructions or held in a default investment until you direct otherwise. Keep copies of all paperwork — the rollover request, confirmation from the IRA custodian, and confirmation from the 401(k) plan that the money was received. You will need these for your tax records.

Frequently Asked Questions

Can I roll over an IRA to a 401(k) if I am still working?

Yes. You do not have to be retired or separated from your employer. As long as your current 401(k) plan permits incoming rollovers, you can move money from an IRA into it while you are still employed.

What if my 401(k) plan does not allow rollovers?

Some plans do not accept incoming rollovers. If yours does not, you have two options: keep the money in the IRA, or wait until you leave the job and roll the 401(k) into an IRA instead. Contact your HR or benefits department to find out your plan's policy.

Do I have to roll over the entire IRA, or can I roll over just part of it?

You can roll over a partial amount. You do not have to move all the money at once. However, if you have a traditional IRA and a Roth IRA, you cannot mix them in a single rollover — each type must go to its matching 401(k) type.

Will the rollover show up on my tax return?

A direct rollover does not appear as income on your tax return. The IRA custodian will send you a Form 1099-R showing the rollover, but it will be marked as a rollover, not a distribution. You do not owe tax on it.

Can I undo a rollover if I change my mind?

Once a direct rollover is complete, you cannot reverse it. If you want to move the money back to an IRA, you would have to roll it out of the 401(k) later, which is a separate transaction. Plan carefully before initiating the rollover.

This guide is for general information only and is not medical, financial, legal, or other professional advice. For decisions specific to your situation, consult a qualified professional. See our Editorial Policy.