Pension Rollover to 401(k) vs IRA: Which Is Better?

Most people automatically roll a pension lump sum to an IRA. But if you're still working, rolling into your current employer's 401(k) can preserve the Rule of 55, delay RMDs by years, and give your balance unlimited federal ERISA creditor protection that IRAs can't match. Here's when each choice wins — and a split strategy that captures both.

Can you roll a pension into a 401(k)?

Yes — with one condition. Under IRC § 401(a)(31) and IRS Topic No. 413, an eligible rollover distribution from a qualified pension plan (corporate defined-benefit, cash balance, or DROP account) can roll to:

• A traditional IRA, or
• Another employer's qualified plan — including a 401(k), 403(b), or governmental 457(b) — if that plan accepts incoming rollovers

The receiving 401(k) is not required to accept rollovers from other plans. Most large-employer plans do, but it's plan-document-dependent. Before initiating anything, get written confirmation from your current 401(k) plan administrator that the plan accepts incoming rollovers from defined-benefit pension plans. Ask for it in writing — verbal confirmation isn't enough when $300K+ is in motion.

Reason 1: Preserve the Rule of 55

This is the most powerful reason to consolidate pension money into your current employer's 401(k) before separating from that job.

Under IRC § 72(t)(2)(A)(v), distributions from a 401(k) are exempt from the 10% early withdrawal penalty when you separate from service in or after the calendar year you turn 55. This is the Rule of 55.

Key mechanics:

• The exception applies to the plan of the employer you're separating from. If you roll old pension money into that plan before separating, the combined balance qualifies.
• The Rule of 55 does not carry over to an IRA. Once you move 401(k) or pension money to an IRA, any withdrawals before 59½ face the 10% penalty (unless you run a 72(t) SEPP program, which locks you in for 5 years or to 59½, whichever is later).
• For public safety employees — police, firefighters, EMTs — the threshold is age 50 under IRC § 72(t)(10).

Timing matters. The rollover must be complete before you separate. You cannot roll assets into your 401(k) after you've left that employer. Give yourself at least 6–8 weeks — plan administrators routinely take that long to process incoming rollovers from pension plans.

Reason 2: Delay RMDs while still working

Under IRC § 401(a)(9)(C)(i) — the still-working exception — if you are still employed by the company sponsoring your 401(k) after your required beginning date, you can defer RMDs on that plan until April 1 of the year after you retire.

How this interacts with a pension rollover:

• RMD start ages under SECURE 2.0: 73 for those born 1951–1959; 75 for those born 1960 or later.
• If you roll your pension into your current 401(k) and continue working past 73 (or 75), that combined balance avoids RMDs until you retire.
• IRA balances do not get the still-working exception. RMDs on IRAs begin at your start age regardless of employment status.

The >5% owner restriction: The still-working exception is not available if you own more than 5% of the company sponsoring the plan. Business owners and major shareholders must begin RMDs on schedule even if still employed.

Dollar illustration: A $700,000 combined balance (401k contributions + rolled-in pension) that remains in the plan under the still-working exception at age 73 avoids a first-year RMD of roughly $26,415 (dividing by the Uniform Lifetime Table factor of 26.5 for a 73-year-old). At a 24% marginal rate, that's ~$6,340 of tax deferred — and the full balance continues compounding untouched. Each year of continued employment repeats that benefit on a now-larger balance.

Reason 3: ERISA creditor protection

A qualified employer plan — 401(k), pension — has unlimited federal creditor protection under ERISA § 206(d) and the Supreme Court's Patterson v. Shumate (1992) ruling. Judgments, lawsuits, and most other creditor actions cannot reach that money. This protection is federal, unlimited in amount, and applies in all 50 states.

IRA protection is more variable:

• In bankruptcy: BAPCPA (2005) protects traditional and Roth IRA balances up to $1,711,975 per person (current cycle: April 1, 2025 through March 31, 2028, per 11 U.S.C. § 522(n)).⁴ That covers most people — but large IRA balances can exceed it.
• Rolled-over funds — important nuance: Funds in an IRA that were rolled directly from a 401(k) or pension plan are separately and fully protected in bankruptcy, without the $1,711,975 cap. The dollar limit applies only to direct IRA contributions accumulated in the account. A pure rollover IRA (all employer-plan dollars) effectively has unlimited bankruptcy protection.
• Outside bankruptcy: IRA protection against non-bankruptcy creditor judgments is purely state law — strong in some states (Texas, Florida give full protection), limited in others.

Who this matters most to: physicians, attorneys, contractors, business owners, and other professionals who face higher-than-average litigation exposure. If you already have an all-rollover IRA with no direct contributions mixed in, the protection gap may be smaller than it appears — but tracing is the IRA holder's burden to document, not automatic.

When the IRA wins instead

The 401(k) advantages disappear or shrink in several common situations:

• You're already 59½. The Rule of 55 only matters between ages 55 and 59½. Once you're past that window, both accounts treat withdrawals identically — and the IRA wins on flexibility.
• Roth conversion strategy. An IRA gives you complete control over how much to convert, when, and at which custodian. While SECURE 2.0 and many large plans now allow in-plan Roth conversions, IRA conversions are simpler, more flexible, and easier to manage across the prime conversion window (ages 63–73, between retirement and RMD onset). See the pension rollover Roth conversion guide.
• Investment options. A 401(k) plan is limited to its investment menu — often 15–30 funds, with expense ratios above what you'd find at Fidelity, Vanguard, or Schwab. On a $500,000+ balance, a 0.25% annual fee difference compounds to $30,000–$50,000 over 15 years.
• Distribution flexibility. Qualified plans typically restrict distributions to specific triggering events (separation, age 59½, hardship, disability). IRAs let you withdraw at any time for any reason — the only cost is the early withdrawal penalty before 59½, which a 72(t) SEPP election can eliminate if needed.
• Estate planning. Post-SECURE Act, both inherited IRAs and inherited 401(k)s are generally subject to the 10-year rule for non-spouse heirs. The distinction is smaller than it once was, but IRA beneficiary designations tend to be more flexible and better understood by custodians.

The split strategy: both destinations

You don't have to choose one. If you want penalty-free access and Roth conversion flexibility, split the pension rollover:

1. Calculate how much you'd need penalty-free between separation (age 55–59) and age 59½ — your planned annual distributions times the number of years.
2. Roll that amount into the current employer's 401(k), preserving Rule of 55 access.
3. Roll the remainder to a traditional IRA, where it's available for Roth conversions, broader investment options, and estate planning.
4. At 59½, roll the remaining 401(k) balance to the IRA and consolidate everything.

Decision table