Moving Money from an IRA to Your 401(k): What You Need to Know

Yes, you can roll over an IRA to a 401(k), but only under specific conditions

You can move money from a traditional IRA into a 401(k) plan, but your employer's plan must permit it, and the IRA must be a rollover IRA or contain only rollover contributions. You cannot roll over a SEP-IRA or SIMPLE IRA into a 401(k) unless you wait at least two years after you stop contributing to the SIMPLE IRA. A direct rollover—where the IRA custodian sends the money straight to your 401(k) plan—is the cleanest route and avoids tax withholding and the 60-day rule.

The reason for these restrictions is that 401(k) plans are employer-sponsored and have stricter rules than IRAs. Your plan document controls what sources of money it will accept. Some plans accept rollovers from IRAs; others do not. You must check with your plan administrator or review your Summary Plan Description before you move any money.

Key Takeaways

• Not all 401(k) plans accept IRA rollovers, so you must confirm with your plan administrator that yours does before starting the process.
• A direct rollover from your IRA custodian to your 401(k) plan avoids income tax withholding and the 60-day deadline that applies to indirect rollovers.
• You cannot roll over a SIMPLE IRA into a 401(k) until at least two years have passed since you stopped making contributions to it.
• After the rollover, the money is subject to your 401(k) plan's withdrawal rules, investment options, and loan provisions rather than IRA rules.

Why someone would roll an IRA into a 401(k)

The main reason is consolidation. If you have multiple IRAs and a 401(k) at your current employer, rolling the IRA into the 401(k) puts all your retirement savings in one place. This simplifies record-keeping and makes it easier to track your balance and investment choices.

Another reason is access to 401(k) loan provisions. IRAs do not allow loans, but many 401(k) plans do. If you need to borrow from your retirement savings for a short-term need, a 401(k) loan may be available to you after a rollover, whereas it would not be through an IRA.

A third reason is the "pro-rata rule" in Roth conversions. If you have both a traditional IRA and a 401(k), and you want to convert some money to a Roth IRA, the pro-rata rule can reduce the tax benefit. Rolling the traditional IRA into the 401(k) first can sometimes help you avoid this rule, though the rules are complex and depend on your specific situation.

Which IRAs can and cannot be rolled over to a 401(k)

A traditional IRA can be rolled over to a 401(k) if the plan permits it. This includes IRAs funded with pre-tax contributions or rollovers from previous 401(k)s or other employer plans.

A rollover IRA—an IRA created specifically to hold money rolled over from an employer plan—can be rolled into a 401(k).

A SIMPLE IRA has a two-year waiting period. You cannot roll it into a 401(k) until at least two years have passed since you first contributed to it or since you stopped being employed by the employer who sponsored it. After that two-year window closes, it can be rolled over.

A SEP-IRA cannot be rolled into a 401(k) directly. SEP-IRAs are designed for self-employed people and small business owners, and 401(k) plans do not accept them as rollovers. If you have a SEP-IRA and want to move money into a 401(k), you would need to withdraw the money and deposit it as a regular contribution, which may be subject to income tax and penalties depending on your age and circumstances.

A Roth IRA can be rolled into a 401(k) only if the 401(k) plan has a designated Roth account and explicitly permits Roth-to-Roth rollovers. Not all plans offer this option. Rolling a Roth IRA into a Roth 401(k) does not trigger a tax event, but it does move the money out of an IRA and into an employer plan with different withdrawal rules.

Direct rollover versus indirect rollover

A direct rollover is when your IRA custodian sends the money directly to your 401(k) plan. You never touch the money. This method avoids federal income tax withholding and keeps you out of the 60-day rule. It is the safest and simplest approach.

To request a direct rollover, contact your IRA custodian (your bank, brokerage, or investment firm) and ask them to initiate a direct rollover to your 401(k) plan. You will need to provide your 401(k) plan's name, your account number, and the custodian's routing information. The IRA custodian will send the money directly to the 401(k) plan custodian. The entire process typically takes one to two weeks.

An indirect rollover is when your IRA custodian sends the money to you, and you then deposit it into your 401(k) within 60 days. The IRS requires that 20 percent of the amount be withheld for federal income tax. If you roll over $10,000, you receive $8,000 and $2,000 is withheld. You have 60 days to deposit the $8,000 into your 401(k). If you do not deposit it within 60 days, it is treated as a taxable distribution and you owe income tax on the full amount plus a 10 percent early withdrawal penalty if you are under 59½.

Indirect rollovers also create a timing risk. If you miss the 60-day deadline by even one day, the IRS will not waive it except in rare hardship cases. A direct rollover eliminates this risk entirely.

Steps to roll over an IRA to a 401(k)

First, confirm that your 401(k) plan accepts IRA rollovers. Contact your plan administrator, your HR department, or review your Summary Plan Description. If the plan does not accept rollovers, you cannot proceed.

Second, contact your IRA custodian and request a direct rollover. Provide them with your 401(k) plan's name, your account number in the 401(k), and ask for the custodian's wire instructions or mailing address. Some custodians have online forms for this; others require a phone call or written request.

Third, the IRA custodian will initiate the transfer. They may ask you to sign paperwork authorizing the rollover. Keep copies of all documents for your records.

Fourth, notify your 401(k) plan administrator that a rollover is coming. Provide them with the amount and the date you expect it to arrive. This helps them post the money to your account correctly.

Fifth, verify that the money arrived in your 401(k) account. Check your 401(k) statement or log into your plan's website. This usually takes one to two weeks after the IRA custodian initiates the transfer.

Tax consequences of a rollover

A direct rollover from a traditional IRA to a 401(k) is not a taxable event. The money moves pre-tax to pre-tax, and you do not owe income tax on the amount rolled over. You will owe taxes only when you withdraw the money from the 401(k) in retirement.

An indirect rollover is also not taxable if you complete it within 60 days, but the 20 percent withholding is still taken out. If you deposit only the $8,000 you received into your 401(k) and do not replace the $2,000 that was withheld, that $2,000 is treated as a taxable distribution. You will owe income tax on it, and if you are under 59½, you will also owe a 10 percent early withdrawal penalty.

A rollover of a Roth IRA to a Roth 401(k) is not taxable. The money stays in a Roth account and grows tax-free. Withdrawals in retirement are tax-free if you meet the Roth requirements.

What happens to your money after the rollover

Once the money is in your 401(k), it is no longer governed by IRA rules. It is now subject to your 401(k) plan's rules, which may be more restrictive. For example, you may not be able to withdraw the money before age 59½ without a 10 percent penalty, even if you are no longer employed by the company. Some plans allow loans; others do not. Some plans allow in-service withdrawals; others do not.

Your investment options are also limited to what your 401(k) plan offers. If your IRA held individual stocks or alternative investments, you may not be able to hold those in your 401(k). You will need to sell them and reinvest the proceeds in the plan's available funds.

The money you rolled over will be treated the same as any other money in your 401(k) for purposes of required minimum distributions (RMDs) at age 73. If you leave your job, you can roll the 401(k) balance—including the rollover amount—into an IRA or another employer plan, or take a distribution subject to the plan's rules.

Frequently Asked Questions

Can I roll over an IRA to a 401(k) if I am self-employed?

No, not in the traditional sense. If you are self-employed and have a SEP-IRA or Solo 401(k), you cannot roll the SEP-IRA into a Solo 401(k). However, if you are self-employed and also work for an employer with a 401(k) plan, you can roll an IRA into that employer's 401(k) if the plan permits it.

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

If your plan does not accept IRA rollovers, you cannot move the money into it. Your only option is to keep the IRA separate or roll it into another employer plan that does accept rollovers. Some plans are designed to be closed to outside rollovers for administrative reasons.

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

Yes, but only if your 401(k) plan has a designated Roth account and explicitly permits Roth-to-Roth rollovers. Not all plans offer this. The rollover itself is not taxable, and the money continues to grow tax-free in the Roth 401(k).

What if I made nondeductible contributions to my traditional IRA?

Nondeductible contributions complicate rollovers because of the pro-rata rule. When you roll over a traditional IRA that contains both pre-tax and after-tax (nondeductible) money, the IRS treats the rollover as a proportional mix of both. You may owe taxes on part of the rollover. Consult a tax professional before rolling over an IRA with nondeductible contributions.

Can I undo a rollover if I change my mind?

No. Once a rollover is complete, you cannot reverse it. If you want to move the money back to an IRA, you would need to roll it out of the 401(k) into an IRA, which is a separate transaction and may have different tax consequences depending on your plan's rules.