When you start a new job, you have the option to roll your old 401(k) into your new employer’s plan — keeping everything under one roof. This can be smart in the right situation, but the new plan has to earn it.
When Rolling to a New Employer Plan Makes Sense
Keep the Rule of 55 option: If you might retire between 55 and 59½, keeping funds in a 401(k) — not an IRA — preserves the Rule of 55, which allows penalty-free withdrawals from your current employer’s plan after separation. IRAs do not qualify.
Simplify administration: One account is easier to manage, rebalance, and track than multiple scattered accounts.
Take advantage of an excellent plan: Federal employees with the Thrift Savings Plan (TSP), or employees at companies with institutional-class funds, may have access to expense ratios below 0.05% — lower than most retail IRA options.
Borrow against it: If your new plan allows loans, rolling in your old balance increases the amount you can borrow (50% of vested balance up to $50,000). IRAs do not allow loans.
Creditor protection: In most states, 401(k) assets have stronger federal ERISA protection from creditors than IRA assets.
When an IRA Is Better
| Factor | New 401(k) | IRA |
|---|---|---|
| Investment options | Plan-limited (often 15–30 funds) | Nearly unlimited |
| Expense ratios | Varies widely (0.05%–1.5%+) | As low as 0.03% |
| Roth option | Only if plan offers Roth 401(k) | Yes — Roth IRA available |
| Loans | Often available | Not allowed |
| RMDs | Required at 73 (unless still working) | Required at 73 (traditional) |
| Rule of 55 | Yes — current employer’s plan only | No |
If your new employer’s plan has limited options or high fees, an IRA rollover almost always wins on long-term returns.
How to Roll Over to a New Employer Plan
- Confirm acceptance: Ask your new plan administrator or HR if the plan accepts incoming rollovers and what account types are eligible
- Get rollover forms: Your new plan provides forms or an online process for incoming rollovers
- Initiate at the old plan: Contact your old administrator and request a direct rollover payable to your new plan’s trustee
- Submit paperwork: Send the completed forms to both plans; some require originals, not copies
- Follow up: Track the transfer — typical timeline is 2–4 weeks
Comparing Old Plan, New Plan, and IRA
Before deciding, request the Summary Plan Description (SPD) from your new employer — it lists all available funds and their expense ratios. Compare to rolling into a Fidelity or Schwab IRA at 0.03–0.05% index fund fees.
Example: $150,000 balance, 30-year horizon, 7% gross return
| Option | Avg Annual Fee | Balance at Year 30 |
|---|---|---|
| IRA (index funds) | 0.05% | ~$1,121,000 |
| New plan (decent) | 0.50% | ~$1,060,000 |
| New plan (expensive) | 1.20% | ~$943,000 |
The $178,000 difference between a low-cost IRA and an expensive plan is entirely attributable to fees compounding against you over time.
To compare the alternative, see 401(k) rollover to IRA. Before making the move, review before you rollover your 401(k) for the full decision checklist. Return to the 401(k) Rollover Guide hub.
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