Old 401(k) or IRA? Compare Costs and Protections

Rolling an old 401(k) into an IRA can be sensible when the IRA provides a meaningfully cheaper version of the portfolio you want, useful investments unavailable in the plan and easier account management. It is not automatically the best choice: retaining the old plan or transferring the balance to a competitive new employer plan may preserve early-withdrawal access, institutional investments, borrowing features or stronger creditor protection.

Compare all three destinations before authorizing a transfer. If the IRA wins after accounting for the benefits you would lose, request a direct rollover; payment made to you generally creates mandatory withholding and a deadline that a direct rollover avoids.

Start with the three realistic destinations

After leaving an employer, you can usually consider keeping the account in the former employer’s plan, transferring eligible assets to a new employer’s plan or opening a rollover IRA. Cashing out is a separate choice because the taxable portion that is not rolled over becomes current income and may also be subject to an additional tax.

Keep the old 401(k): favor this option when its total costs are competitive and it contains investments or withdrawal provisions you expect to use.
Move to the new 401(k): consider consolidation when the new plan accepts rollovers and offers suitable investments, fees and plan features.
Roll into an IRA: consider this when investment flexibility, account control and administration outweigh workplace-plan benefits.

A new employer plan does not have to accept rollover contributions, and it may accept some tax sources but not others. Obtain its current rollover instructions before asking the old plan to release the assets.

Compare fees using the portfolio you will actually hold

An IRA is not inherently cheaper than a 401(k). For each destination, list plan or account charges, fund expense ratios, advisory fees, transaction costs and any service fees applied to former employees.

Compare investments that perform the same job. An old plan may provide a low-cost institutional index or target-date fund that is unavailable to retail IRA investors. Conversely, a self-directed IRA holding inexpensive diversified funds may cost less than a plan with substantial administration or managed-account charges.

Convert percentage differences into dollars without treating the result as a return forecast. In a conditional example, a 0.30 percentage-point annual cost difference on a $200,000 balance is $600 in the first year before market movements. The relevant question is whether that saving compensates for every feature surrendered in the transfer.

Use the plan’s participant fee disclosure and the IRA provider’s complete pricing schedule. A headline such as “no account fee” does not account for fund expenses, advice charges, sales loads or costs embedded in another investment product.

Decide whether broader investment access is useful

An IRA may provide access to more mutual funds, exchange-traded funds, individual securities and fixed-income products than an employer-selected menu. It can also consolidate several former-employer accounts under one custodian.

More choice is valuable only if it improves the portfolio you intend to maintain. A well-priced 401(k) with diversified index funds, an appropriate target-date series or a stable-value option may already cover your needs. Certain institutional or stable-value products may not have close IRA substitutes.

Ask whether each holding can transfer in kind. Proprietary or plan-only investments may need to be sold, leaving the proceeds in cash until you place new orders. Document the liquidation, transfer and reinvestment sequence so that an administrative move does not create an unintended period outside the market.

Protect Rule of 55 access before moving the account

Comparison of retaining a qualifying former-employer plan for Rule of 55 access versus transferring the balance to an IRA

FINRA’s rollover guidance identifies investment options, fees, plan-based withdrawal access, borrowing and creditor treatment as distinct factors in a 401(k)-to-IRA decision. These factors should be evaluated separately rather than reduced to a single fee comparison.

The Rule of 55 can provide an exception to the additional tax on distributions from the plan sponsored by an employer you separate from during or after the calendar year in which you turn 55. It does not transfer to a rollover IRA, and ordinary income tax can still apply to taxable withdrawals.

The exception is linked to the qualifying employer plan, not to every 401(k) you happen to own. If you may need retirement assets before age 59½, verify your separation date and the plan’s distribution rules before transferring the balance. A plan can impose operational limits, such as restrictions on partial or installment withdrawals, even when the tax exception is potentially available.

Do not roll first and assume the transaction can easily be reversed. A receiving plan may decline later rollovers, and the lost access could be worth substantially more than a modest annual fee difference.

Loans and creditor protection may favor a workplace plan

An IRA cannot offer a participant loan. A current employer’s 401(k) may permit loans under its plan document, but availability, costs and repayment terms vary. Moving an old balance into the current plan may increase the account balance used in its loan calculation, although the plan’s limits still control.

Keeping a former employer’s account does not necessarily preserve borrowing access. Plans commonly restrict new loans to active employees, so confirm eligibility rather than relying on a general description of 401(k) features. If borrowing matters, also consider the consequences of leaving the new job while a loan is outstanding.

Creditor protection requires a more individualized comparison. Assets in an ERISA-covered workplace plan generally receive broad federal protection, while IRA protection outside bankruptcy depends significantly on state law; exceptions and different rules can apply to particular plans, claims and domestic-relations orders.

Preserve statements showing that IRA assets came from a qualified employer plan, especially if rollover money will be combined with annual IRA contributions. If your occupation, business ownership or an existing dispute creates material creditor exposure, obtain state-specific legal advice before consolidating.

Check the backdoor Roth effect

A pre-tax rollover IRA can make a future backdoor Roth conversion partly taxable. Giving the rollover IRA a separate account name or placing it at another custodian does not, by itself, isolate its pre-tax balance for the conversion calculation.

Fidelity’s explanation of the IRA aggregation rule notes that the taxable share of a conversion is based on deductible contributions and earnings versus nondeductible contributions across the relevant traditional IRAs. You generally cannot select only the nondeductible dollars for conversion while ignoring existing pre-tax IRA assets.

If you expect to use backdoor Roth conversions, determine whether a suitable old or new 401(k) can hold the pre-tax money instead. Confirm that the employer plan accepts the rollover before initiating either transaction, and have a tax professional model the conversion effect when your accounts contain mixed basis.

This issue does not make every IRA rollover unsuitable. Compare the expected tax cost during the years you intend to make conversions with the IRA’s investment, fee and administrative advantages.

Use a direct rollover to avoid the withholding gap

Indirect rollover example showing $20,000 withheld from a $100,000 distribution and the resulting rollover funding gap

Choosing a destination and choosing a transfer method are separate decisions. In a direct rollover, the old plan sends the eligible distribution to the receiving IRA or employer plan. A check can still represent a direct rollover when it is payable to the receiving institution for your benefit rather than payable to you personally.

Under IRS rollover rules, a retirement-plan distribution paid to you is generally subject to 20% mandatory withholding even if you intend to roll it over, while a direct rollover avoids that withholding; a distribution received by you ordinarily must be redeposited within 60 days. Rolling over the full eligible amount after withholding requires you to replace the withheld money from another source.

Consider a conditional $100,000 eligible pre-tax distribution paid to you. Applying the confirmed 20% withholding rate, the plan sends you $80,000 and withholds $20,000. Completing a full rollover requires depositing $100,000 within the permitted period, so you must temporarily supply the missing $20,000.

If you deposit only the $80,000 received, the withheld $20,000 is not part of the rollover and is generally treated as a distribution. It may be taxable, and an additional tax may apply depending on your age and available exceptions. The withholding can be credited on your tax return, but that later credit does not remove the immediate funding gap.

Request written payee instructions from the receiving institution and retain the transfer confirmation and tax documents. Do not classify the transaction solely by whether a physical check passes through your hands; the payee designation is critical.

Use this branching checklist

Could you need withdrawals before age 59½? If the Rule of 55 may apply, verify eligibility and distribution flexibility before moving the qualifying account.
Do you need participant-loan access? Compare the new plan’s loan terms because an IRA cannot provide a plan loan and an old plan may restrict former employees.
Is creditor exposure material? Review the applicable ERISA, bankruptcy and state-law treatment before combining accounts.
Do you plan backdoor Roth conversions? Estimate how a new pre-tax IRA balance would change the taxable proportion.
Does either plan contain valuable investments? Identify institutional, stable-value or proprietary options and price realistic replacements.
Which destination is cheaper for your portfolio? Include administration, investments, advice and transaction charges.
Will the new plan accept the assets? Confirm the treatment of pre-tax, designated Roth and after-tax sources.
How will the assets move? Prefer a direct rollover unless a reviewed, specific reason requires payment to you.

Pause for specialized tax advice if the account includes appreciated employer stock, after-tax contributions, mixed traditional and Roth sources, an outstanding plan loan or a required distribution. Those features can change the appropriate destination or processing instructions.

How the answer changes by situation

An early retiree: retaining a qualifying former-employer plan may be more valuable than modest IRA fee savings because of the Rule of 55. Ask whether the plan permits partial withdrawals or a partial rollover before deciding how much must remain.

A long-term self-directed investor: an IRA may be preferable when it offers the intended diversified portfolio at a meaningfully lower total cost and no plan-only feature is useful. Prepare the investment allocation before the transfer so cash is not left idle unintentionally.

A backdoor Roth user: holding pre-tax assets in a competitive employer plan may avoid adding them to the relevant IRA aggregation calculation. Model the tax effect before a rollover IRA receives the money.

A saver with a strong new plan: moving the balance to the current 401(k) can consolidate accounts while retaining workplace-plan features. This option works only if the plan accepts the assets and its costs, investments and distribution provisions are competitive.

Build a one-page comparison before signing

Create columns for the old 401(k), new 401(k) and proposed IRA. Add rows for administrative charges, weighted investment expenses, advice fees, desired investments, Rule of 55 eligibility, loan access, creditor treatment, backdoor Roth impact and withdrawal flexibility. Mark every benefit that disappears immediately after a rollover.

Then obtain written receiving instructions and confirm the registration and tax character of each destination account. After the transfer, verify that each source reached the correct account, invest transferred cash according to your allocation, update beneficiaries and retain the statements and tax forms. Choose the destination that preserves the benefits you are likely to use while providing costs and investments you can manage.

Should You Roll an Old 401(k) Into an IRA? Compare Fees, Investments and Lost Protections