How To Report a 401k Rollover on a Tax Return: Forms, Rules, and Reporting Steps

Depending on the type of IRA selected, this may provide broader investment options and greater flexibility, although investment choices, fees and tax treatment vary by provider and jurisdiction. And, in some cases, the opportunity to continue contributing to a US retirement account while overseas.

However, filing an annual US tax return from abroad is already a complex process, and the requirement to report a 401(k) rollover can add further complications.

If you qualify as living and working outside the United States, you generally benefit from an automatic two-month filing extension, with the option to extend further via Form 4868. The extension applies to filing, not to payment of tax. Interest generally begins accruing from the regular filing deadline on any unpaid tax.

In this guide, we’ll explain how to report a 401(k) rollover on a tax return, detailing the relevant forms and reporting steps. We also outline the rules for 403(b) rollovers, transfers between IRAs, and the ways in which a qualified tax adviser can assist with accurate rollover reporting.

Do I Need To Report a 401(k) Rollover on My Tax Return?

Whether you transfer your 401(k) to a traditional or a Roth IRA, the rollover generally needs to be reported on your US income tax return, even where no tax is due. However, depending on the type of IRA and rollover you choose, you’ll have to file specific 401(k) rollover tax forms. There are two types of rollovers you can consider:

1. Direct rollovers
2. Indirect rollovers

Direct Rollovers

A direct rollover involves a direct transfer of your 401(k) funds to a traditional or Roth IRA account. No funds are paid to you, so the process avoids the 60-day redeposit rule that applies to indirect rollovers.

A direct rollover from a traditional 401(k) to a traditional IRA is generally not taxable for US federal income tax purposes because both accounts typically hold pre-tax retirement savings.

However, the rollover must still be reported on your US tax return using the information provided on Form 1099-R. Although the transaction is reported as a distribution for IRS reporting purposes, no federal income tax is generally due on a qualifying direct rollover.

If you transfer a traditional 401(k) to a Roth IRA, this is known as a Roth conversion because pre-tax retirement savings are moved into a Roth IRA, where qualified withdrawals may be tax-free under US tax law.

The conversion must be reported on your US tax return, and you will generally include the taxable portion of the conversion in your taxable income for the year in which it occurs. If your 401(k) includes any after-tax contributions, those amounts may not be taxable as part of the conversion.

The taxable portion of a Roth conversion is generally included in your US taxable income for the calendar year in which the conversion occurs and may increase your marginal federal income tax rate for that year. As a result, some higher-income taxpayers choose to spread conversions over multiple tax years to help manage their overall US tax liability.

If you are resident in a country that does not fully recognise the US tax treatment of Roth IRAs, the conversion may also have tax consequences in your country of residence.

For example, HMRC’s published guidance issued in 2025 indicates that certain Roth conversions may be taxable for UK residents despite earlier interpretations of the UK–US tax treaty.

Because the interaction between US and local tax rules can be complex and depends on individual circumstances, the cross-border tax implications should be reviewed before completing a conversion.

Indirect Rollovers

With an indirect rollover of a 401(k) to an IRA, you receive the rollover amount and deposit it into a traditional IRA. You must deposit the funds within 60 days of receiving them. Otherwise, you’ll be liable for income tax on the rollover amount and will have to pay a 10% early withdrawal penalty if you’re under the retirement age of 59½.

Indirect plan distributions are subject to mandatory 20% federal withholding. This withholding is treated as a credit against your federal income tax liability and may be refunded if your total payments exceed your final tax liability.

For example, if you roll over $10,000, you’ll receive $8,000 because the 401(k) administrator withholds the 20%. You must still deposit the full $10,000 to an IRA, meaning you must secure the withheld $2,000 yourself. If you don’t, you’ll have to pay income tax on the $2,000 and a 10% early withdrawal penalty if you’re under 59½.

How To Report a Rollover From a 401(k) to an IRA?

Before filing your annual US tax return, you must collect the necessary information to report your rollover correctly. That includes:

• Identify the retirement accounts involved in the rollover (for instance, a 401(k) and a Roth IRA) since this impacts tax liability.
• Determine whether you have any non-deductible or after-tax contributions in your rollover account, as these amounts are not taxable and must be reported separately, which may need to be reported on Form 8606 depending on the type of contribution and transaction.

For an indirect rollover, you must also determine:

1. How many days elapsed between receiving and redepositing the funds to a new retirement plan (60 days is the deadline to avoid tax penalties).
2. If you made another IRA-to-IRA rollover within the last 12 months. Note that only one such rollover is allowed per year under IRS rules. This limit does not apply to rollovers from a 401(k) or 403(b) to an IRA.
3. Whether the plan administrator withheld the mandatory 20% federal tax.

After gathering this information, complete the specific forms depending on the type of rollover you choose.

The tax return is generally due on 15 April. If you qualify for the automatic two-month extension available to US citizens and resident aliens living and working abroad, your filing deadline is generally extended to 15 June. If 15 June falls on a Saturday, Sunday, or legal holiday, the deadline moves to the next business day.

The automatic two-month extension applies to filing your return, not to paying any tax due. Interest generally begins to accrue on unpaid tax from the original 15 April due date, even if you qualify for the automatic filing extension.

Where To Report Direct Rollovers

If you opt for a direct 401(k) rollover, you will receive Form 1099-R from your former employer or 401(k) administrator. Use the information from this form to complete your Form 1040.

When you receive the 1099-R, check that it is correctly labelled as a direct rollover and includes the following information:

If a portion of the distribution is directly rolled over to an IRA and another portion is distributed to you, the 401(k) provider must prepare two Forms 1099-R.

Next, complete Form 1040—an individual tax return—entering rollover information like:

Where To Report Indirect Rollovers

You need to roll over the full distribution amount (including any amount withheld for federal tax) within 60 days to avoid tax and potential penalties. The amount withheld (shown in Box 4 of Form 1099-R) will be credited against your tax liability and may be refunded if your total withholding and credits exceed your tax due.

The total distributions must be reported on line 5a of Form 1040, while the withheld federal tax should be reported in the following places:

1. In box 4 of Form 1099-R
2. On line 25b of Form 1040

If you miss the 60-day deadline, the rollover becomes a taxable event, meaning you must report the amount you failed to deposit on line 5b (taxable amount) on Form 1040.

For both direct and indirect rollovers, the trustee of your IRA will send you Form 5498 (typically by the end of May) to report the rollover contribution to the IRS.

Form 5498 is for information only and does not need to be filed with your tax return.

Ensure you file a tax return correctly after a 401(k) rollover by consulting an expert. Our financial advisers at Titan Wealth International provide a complimentary 401(k) to IRA rollover assessment to help you streamline your retirement savings consolidation and minimise tax liabilities.

Do I Need To Report a 403(b) Rollover to a Traditional IRA on My Taxes?

You need to report 403(b) rollovers using the same forms you’d use for a 401(k) rollover to an IRA. 403(b) rollovers can also be direct and indirect, and the taxation of a rollover amount will depend on the IRA to which you transfer your retirement savings. Since 403(b) plans are tax-deferred, direct transfers to traditional IRAs will be generally non-taxable for US federal income tax purposes.

Do I Need To Report an IRA Rollover on My Taxes?

If you’re rolling over retirement savings from a non-IRA plan like a 401(k) to an IRA, you must report the rollover on your tax return. However, direct trustee-to-trustee IRA transfers generally are not reported as taxable distributions on your income tax return.

This only applies if you’re moving funds between IRAs with the same tax treatment. If you want to roll over a traditional IRA to a Roth IRA to gain more flexibility over your investments and withdrawals, you must convert pre-tax traditional IRA funds to post-tax Roth funds. In this case, you must file Form 8606 to report the converted amount.

How Can Your Country of Residence Tax a 401(k) Rollover?

Although a qualifying direct rollover generally does not trigger US federal income tax, your current country of residence may treat the rollover or conversion differently for local tax purposes. The specific tax treatment depends on:

• Regulations surrounding taxable events
• Local tax laws
• Double taxation agreement (DTA) provisions

These factors may produce notably different tax consequences, so it is critical to familiarise yourself with local regulations. For instance, lump-sum distributions from US pension plans to UK residents were not taxable in the UK under the US-UK DTA until 2025, when HMRC invoked the savings clause to make them taxable.

Although you may utilise foreign tax credits to mitigate double taxation, this change significantly impacts your overall tax position and reporting requirements.

Similarly, certain EU countries, such as Sweden, may treat 401(k) rollovers as taxable events. In 2019, the Swedish Tax Authority issued a court ruling stating that the taxable event occurs at the time of the rollover because the holder obtains unrestricted access to the funds once they reach the IRA. If appropriate, completing the rollover before becoming a Swedish tax resident may reduce adverse tax consequences.

Understanding these rules before completing a rollover can help you avoid unexpected cross-border tax consequences.

How Can a Tax Adviser Help You File a 401(k) Rollover Tax Form?

Consulting a tax adviser can ensure you choose the best rollover strategy for your retirement goals and file the necessary forms correctly. A tax adviser can assist by:

1. Advise on the most suitable rollover type
2. Reviewing your tax forms

Advise on the Most Suitable Rollover Type

Before the rollover, a tax adviser can assess your 401(k) and advise on whether you should opt for a direct or an indirect rollover. The latter is typically only recommended if your 401(k) provider doesn’t allow direct rollovers.

A tax adviser will help you determine the amount of tax you owe on the rollover amount depending on the IRA you’re transferring retirement savings to. This is especially helpful if you’re moving funds between accounts with different tax treatments, like:

• Converting 401(k) savings to a Roth IRA
• Transferring a Roth 401(k) to a Roth IRA

Review Your Tax Forms

A tax adviser can review Form 1099-R to ensure your 401(k) provider entered the correct information. They can also help you use the information from Form 1099-R to complete Form 1040 with the correct amounts, ensuring you don’t skip any fields or include the wrong information.

If you opted for an indirect rollover and missed the 60-day deadline due to circumstances beyond your control (like an error committed by your financial institution), a tax adviser can assist you with obtaining a waiver. They can help you determine if you:

1. Qualify for an automatic waiver
2. Need to file a written self-certification requesting a waiver
3. Must request and receive a private letter ruling granting the waiver

You typically qualify for an automatic waiver if the financial institution made the mistake. If you missed the deadline for another reason (such as lost or uncashed distribution check, severe damage to the principal residence, serious illness or death of a family member, postal error, restrictions posed by a foreign country, or distribution to a state unclaimed property fund), a tax adviser can provide guidance with a self-certification or private letter ruling, whichever is more suitable for your circumstances.