What to Do with an Old 401(k) After Leaving a Job

1. Start with the account’s rules, not a rollover pitch

Get a current statement, the plan’s participant fee disclosure and its distribution instructions. Check your vested balance rather than assuming the entire displayed balance belongs to you. Your own contributions are fully vested, but some employer contributions may not be. Also identify any outstanding plan loan; leaving a job can change repayment arrangements and create a taxable loan offset if repayment stops.

You may not have unlimited time to decide. A plan can generally require distribution of a former employee’s vested benefit of $7,000 or less if its terms allow. For a mandatory distribution over $1,000, the plan generally must send the money to an IRA unless you elect otherwise. Smaller balances may be paid directly. Read every notice and keep your mailing address and beneficiary information current.

Use the table as a starting point, not a verdict. A low-cost workplace plan can be better than an expensive IRA, while an inexpensive IRA can improve on a high-fee plan. Ask what applies to your particular account.

• Separate pretax, designated Roth and non-Roth after-tax balances.
• Identify employer shares, loan balances and pending employer contributions.
• Ask about distribution deadlines, installment options and former-employee fees.

2. Leaving it in place can be a sensible holding pattern

Keeping the old 401(k) can work well if its investment menu is solid and its total costs are low. Large plans sometimes offer institutional pricing or stable-value investments that are not available in an IRA. You generally cannot make new payroll contributions after leaving, but the account can remain invested. Confirm whether former employees pay additional administrative charges or face restrictions on partial withdrawals.

Creditor protection is another reason to pause. Most private-sector 401(k) plans covered by the Employee Retirement Income Security Act, or ERISA, have strong federal protection from creditors, both inside and outside bankruptcy. That protection is not absolute: exceptions include certain domestic relations orders and federal tax collection. Governmental and church plans can follow different rules, so do not assume every workplace account has identical protection.

Leaving money in this particular plan may also preserve early access. If you separate from service during or after the calendar year you turn 55, distributions from that employer’s plan may avoid the 10% additional tax on early distributions. Ordinary income tax still applies to taxable amounts. This exception generally does not follow money into an IRA, and the plan must permit the withdrawal arrangement you need. Special rules can apply to certain public safety workers.

3. A new employer’s plan can simplify your finances

Moving the old balance into your new employer’s 401(k) puts more savings under one login and one investment menu. It can make rebalancing and beneficiary updates easier while retaining workplace-plan creditor protections. But the receiving plan is not required to accept rollovers. Ask which contribution types it accepts, whether you must wait until becoming eligible and what documentation it needs.

Compare actual costs before consolidating. Review investment expense ratios, account-level administrative charges and any advisory or managed-account fees. A fee quoted as a small percentage can matter on a large balance: 0.50% costs $500 annually per $100,000 invested, before underlying fund expenses if those are additional. Also compare investment quality, not simply the number of funds. A short, inexpensive menu may cover everything you need.

• Confirm that the new plan accepts each tax category in your old account.
• Ask whether incoming rollover money becomes eligible for plan loans; borrowing carries risks.
• Check withdrawal rules, especially if you expect to leave work before age 59½.
• If you are near required-distribution age, ask about the still-working exception and its ownership limits.

4. An IRA offers flexibility, but compare the trade-offs

A rollover IRA often offers a wider selection of investments and more flexible withdrawals than a workplace plan. You can choose a low-cost brokerage account, pay for advice or use another arrangement. Those are different products with different costs. Look for fund expenses, advisory charges, account fees, trading costs and surrender restrictions before signing. A rollover recommendation is not proof that moving the money benefits you.

Tax treatment depends on the destination. Pretax 401(k) money generally moves tax-deferred into a traditional IRA through a properly completed rollover. Moving it into a Roth IRA is generally a taxable conversion. Designated Roth 401(k) money can go to a Roth IRA, but the Roth IRA’s five-year rules deserve attention, particularly if this would be your first Roth IRA.

An IRA also changes the legal and tax landscape. Federal bankruptcy law generally protects qualifying retirement assets, with special treatment for properly documented employer-plan rollover money. Outside bankruptcy, IRA creditor protection depends heavily on state law. Keep rollover records. Also consider future backdoor Roth contributions: pretax traditional, SEP and SIMPLE IRA balances generally enter the pro-rata calculation for Roth conversions. Workplace-plan balances do not. Consolidating into an IRA can therefore make that strategy more taxable than expected.

5. Use a direct rollover to avoid the withholding trap

For most moves, request a direct rollover between the old plan and the receiving retirement account. Money can move electronically or by a check payable to the receiving custodian or trustee for your benefit. A check mailed to you can still qualify as direct if it is payable correctly. Get the receiving institution’s exact instructions before authorizing payment.

When an eligible rollover distribution is paid to you instead, the plan generally must withhold 20% of its taxable amount for federal income tax. You generally have 60 days to complete the rollover. To roll over the full gross amount, you must replace the withheld portion using other money; the withholding is credited on your tax return. Without replacement, the unrolled amount is generally taxable and may face the additional early-distribution tax.

Some distributions cannot be rolled over, including required minimum distributions and hardship distributions. Loan offsets can involve different deadlines, with certain employment-related offsets eligible for an extended rollover deadline. Get help promptly if a loan is involved. Keep transaction confirmations and review Form 1099-R and any Form 5498. A tax-free rollover can still require reporting on your federal return.

6. Pause for employer stock and after-tax contributions

Employer stock can make an otherwise routine rollover consequential. Under the net unrealized appreciation, or NUA, rules, certain qualifying distributions of employer shares to a taxable brokerage account may receive favorable treatment. Generally, the shares’ cost basis is taxable when distributed, while qualifying appreciation is taxed at long-term capital gains rates when sold. Strict requirements apply, including rules about triggering events and lump-sum distributions.

Rolling those shares into an IRA generally eliminates the ability to use NUA treatment for them. Yet NUA is not automatically the better deal: current taxes, concentration risk, your age and future tax rates all matter. Have a tax professional evaluate the stock before selling or transferring it, not after the transaction is irreversible.

Non-Roth after-tax contributions need separate attention. They are not the same as designated Roth contributions, and their earnings are generally pretax. Properly structured distributions can direct after-tax amounts to a Roth IRA and pretax amounts to a traditional IRA or eligible plan. Allocation and distribution rules matter; you cannot simply label every dollar as tax-free.

• Request written records of employer-stock cost basis and appreciation.
• Obtain the plan’s breakdown of after-tax basis and associated earnings.
• Coordinate destination accounts and instructions before the plan releases funds.

7. Treat cashing out as a separate spending decision

Cashing out delivers money now but usually sacrifices tax-deferred growth and creates current taxes. Pretax withdrawals generally count as ordinary income. Before age 59½, an additional 10% federal tax often applies unless an exception fits. State taxes may also apply. Roth balances have separate distribution rules; do not assume every withdrawal from a Roth 401(k) is tax-free.

If you need cash, estimate your actual tax bill rather than treating withholding as the final cost. Ask whether a partial distribution is allowed, and compare other funding sources without overlooking their interest or repayment risks. An exception to the 10% tax does not necessarily eliminate income tax. Choose what solves your immediate need while preserving as much retirement money as practical.