IRA Rollover Guide: How to Move a 401(k) Without Costly Mistakes

An IRA rollover moves eligible retirement savings into an individual retirement account. When moving an old 401(k), a direct rollover to the receiving custodian generally avoids mandatory withholding and the 60-day deadline that applies when a distribution is paid to you. Choosing the right destination and preserving the money’s tax treatment matter just as much as completing the transfer.

A rollover is optional in many situations. Compare keeping the employer plan, moving to a new employer’s plan and opening an IRA before deciding. Moving pretax savings to a Roth IRA generally creates taxable conversion income; it is not the same as moving them to a traditional IRA.

What is an IRA rollover?

A rollover preserves eligible retirement assets within a tax-advantaged account, subject to the applicable rules. A “rollover IRA” is usually a traditional IRA that receives workplace retirement money, rather than a separate kind of tax account. Read our IRA overview if you are comparing account types.

Not every retirement distribution can be rolled over. Required minimum distributions, hardship distributions and certain other payments are excluded. Governmental 457(b) assets have rollover options that generally do not apply to nongovernmental 457(b) plans. SIMPLE IRAs have special restrictions during their first two years. The IRS rollover chart identifies permitted account combinations and important exceptions.

Compare your options before moving an old 401(k)

Compare total costs, including plan administration, advisory fees, fund expenses, trading charges and cash-sweep yields. A brokerage account with no annual fee can still cost more than an institutional plan investment. Wider choice helps only if you choose appropriate investments.

Direct versus indirect rollovers

Direct rollover: payment to the receiving custodian

Ask the receiving institution for exact written payee and account instructions. A plan may send money electronically or issue a check payable to the new custodian “for the benefit of” you. Handling that check does not by itself make the rollover indirect. Deposit it as instructed rather than cashing it into your personal account.

A properly completed direct rollover avoids mandatory 20% withholding on an eligible employer-plan distribution. The indirect-rollover 60-day rule does not apply, although administrators can impose paperwork requirements and check-expiration dates. Direct does not mean tax-free in every case: a pretax-to-Roth rollover generally remains taxable.

Indirect rollover: payment to you

When an eligible taxable employer-plan distribution is paid to you, the plan generally withholds 20% for federal tax. You normally have 60 days from receipt to roll over the eligible amount. To roll over the full gross amount, you generally need other funds to replace the withholding. IRA distributions have different withholding rules; do not assume the plan’s mandatory 20% applies to an IRA withdrawal. See the IRS rollover guidance.

Example: A fully taxable $50,000 eligible 401(k) distribution paid to you could produce a $40,000 check after $10,000 withholding. Rolling over $50,000 within the deadline requires replacing the $10,000. If you roll over only $40,000, the remaining $10,000 generally stays taxable and may face an additional early-distribution tax. The withholding is credited on your tax return; it does not automatically equal the final tax owed.

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

1. Inventory the old account. Identify pretax, Roth and after-tax amounts, outstanding loans, employer stock and any distribution restrictions. Save statements and beneficiary information.
2. Compare the destinations. Ask both administrators about accepted assets, fees, protected benefits and any restrictions on a later move back to a plan.
3. Open the appropriate receiving account. A traditional IRA commonly receives pretax savings; a Roth IRA receives designated Roth money or a taxable conversion. Confirm treatment of after-tax basis before requesting a split.
4. Request a direct rollover in writing. Confirm the exact payee, account number, delivery method and tax-character breakdown with both institutions.
5. Track the transfer. Keep the distribution confirmation and check or transfer reference. Follow up if it stalls; there is no universal completion timetable.
6. Confirm investment and records. A cash rollover may remain uninvested until you place instructions. Check the asset allocation, beneficiaries and receipt amount, then retain tax forms.

A rollover may require selling investments, depending on the plan and receiving institution. Ask about time out of the market, in-kind transfer eligibility and transaction costs before approving liquidation. Market prices can rise or fall during a transfer.

Match pretax, Roth and after-tax money correctly

Pretax plan savings moved properly into a traditional IRA generally remain tax-deferred. Moving those assets into a Roth IRA generally includes the pretax amount in taxable income for that year. A conversion can also affect income-based benefits and other tax calculations; compare the timing with a qualified tax professional.

Designated Roth 401(k) assets can generally roll into a Roth IRA, but the Roth IRA’s qualified-distribution five-year period is not simply the plan’s holding period. After-tax non-Roth plan contributions have separate basis and allocation rules. Ask the administrators how they will report any split between traditional and Roth destinations instead of treating the full account as one tax category.

Existing nondeductible IRA basis also matters. Form 8606 generally considers the aggregate traditional, SEP and SIMPLE IRA balances when determining the taxable share of relevant distributions or conversions. A large pretax rollover IRA can affect a later “backdoor Roth” strategy. Preserve basis records; merely labeling a separate IRA “after-tax” does not isolate that basis. See the IRS Form 8606 instructions and our Roth versus traditional IRA comparison.

Limits, deadlines and exceptions

• Annual contribution limits: Eligible rollover amounts do not use your regular annual IRA contribution allowance. A regular contribution and a rollover are different transactions.
• One-per-year restriction: Generally, only one IRA-to-IRA indirect rollover is permitted in a rolling 12-month period across your IRAs. Trustee-to-trustee transfers, plan-to-IRA rollovers and Roth conversions are among the transactions outside that restriction.
• Missed 60-day deadline: Automatic relief, self-certification or an IRS waiver may be available under specific requirements. Self-certification is not an IRS determination that a waiver is valid. Act promptly and follow the IRS waiver procedures.
• Plan loans: A loan offset can create a distribution. Certain qualified plan loan offsets have a rollover deadline extending to the tax-return due date, including extensions. Other loan-related events can be treated differently.
• RMDs: An RMD cannot be rolled over. Resolve any required distribution before transferring the eligible remainder. See our RMD guide.
• Inherited accounts: A nonspouse beneficiary generally cannot roll inherited assets into their own IRA. An eligible direct transfer to a properly titled inherited IRA has separate requirements.

When an IRA rollover can be the wrong move

Early access: A qualified-plan separation-from-service exception can apply when you leave during or after the year you reach age 55, with separate rules for certain public-safety workers. It does not generally carry into an IRA. Governmental 457(b) distributions have different additional-tax rules, including qualifications for money rolled in from other plans. Compare the IRS early-distribution exceptions before transferring money you may need.

Employer stock: Moving appreciated employer shares into an IRA can eliminate a potential net unrealized appreciation tax strategy. Get specialized advice before selling or transferring those shares.

Creditor protection and working longer: Workplace plans and IRAs have different legal protections, and state law and bankruptcy rules matter. Some employer plans permit delayed RMDs while you remain employed, subject to plan terms, ownership and other requirements; traditional IRAs do not offer the same still-working exception. These are reasons to compare the exact plan rather than assume an IRA is always better.

In-service access: If you still work for the sponsoring employer, the plan may restrict distributions. Being eligible to open an IRA does not mean your current 401(k) is eligible to move.

Who an IRA rollover suits, and alternatives

An IRA can suit someone who wants to consolidate eligible old accounts, choose investments unavailable in a plan and manage withdrawals independently. It is less compelling when the old or new employer plan has lower costs or benefits you need. Keeping an old plan or using an accepting new employer plan can be reasonable alternatives.

For account selection, compare custody, service, investments and total costs through our IRA resources. This guide explains the mechanics; it does not determine whether a rollover or conversion is suitable for your tax and financial situation.