Retirement Planning

What Happens to Your 401(k) When You Change Jobs?

4 min read

You've landed a new job — congratulations. Now, what do you do with the 401(k) sitting at your old employer? You have four options, and the wrong choice can cost you thousands in unnecessary taxes and fees.

Option 1: Leave It With Your Old Employer

The simplest choice — but not always the best.

Most plans allow former employees to keep their balance as long as it exceeds $5,000 (if your balance is below that, the plan can force you out — more on that below). The money stays invested and continues to grow tax-deferred.

Pros: Zero effort required. Maintains creditor protections under ERISA (stronger than IRA protections in most states).

Cons: You lose the ability to contribute. You're stuck with that plan's investment menu and fees. Managing multiple old 401(k)s across several former employers becomes an administrative headache. You might forget about an account entirely — the Department of Labor estimates there are millions of orphaned 401(k)s worth collectively over a trillion dollars.

Option 2: Roll Over to Your New Employer's 401(k)

Clean consolidation — if the new plan is good.

A direct rollover (trustee-to-trustee transfer) is tax-free and combines your old balance with your new contributions, keeping everything in one place.

Pros: One account, one login. Preserves ERISA creditor protections. Allows you to take a 401(k) loan against the combined balance (if your plan allows loans). Keeps the door open for backdoor Roth IRA contributions by avoiding a Traditional IRA balance that would trigger the pro-rata rule.

Cons: You're limited to the new plan's investment options. If the new plan has high fees or poor fund choices, you've traded one mediocre plan for another.

Option 3: Roll Over to a Traditional IRA

Maximum control, lowest cost — usually the best option.

Open a Traditional IRA at Vanguard, Fidelity, or Schwab and request a direct rollover from your old plan. This is also tax-free if done properly.

Pros: Unlimited investment choices — low-cost index funds, ETFs, individual stocks. Typically lower fees than employer plans. Consolidation — roll every old 401(k) into the same IRA over your career.

Cons: Loses ERISA creditor protection (IRA protections vary by state). A Traditional IRA balance complicates backdoor Roth IRA conversions due to the pro-rata rule. No 401(k) loan option.

Important: Always request a direct rollover where the check is made payable to the receiving institution (e.g., "Fidelity FBO Your Name IRA"), not to you personally. An indirect rollover — where you receive the money and have 60 days to deposit it — triggers mandatory 20% federal withholding and opens the door to a taxable event if you miss the deadline.

Option 4: Cash Out (Don't Do This)

Almost always a mistake.

Cashing out triggers:

Ordinary income tax on the full amount
10% early withdrawal penalty if you're under 59.5
Mandatory 20% federal withholding (which might not cover your full tax bill)

Example: You're 35, in the 22% bracket, and cash out a $50,000 401(k). You lose $5,000 to the 10% penalty immediately. The plan withholds $10,000 (20%). At tax time, you owe roughly $11,000 in income tax on the $50,000 — but only $10,000 was withheld, so you write another $1,000 check. Total loss: roughly $16,000. You walk away with ~$34,000 out of $50,000. Then you lose decades of tax-deferred growth on top of that.

What If Your Balance Is Under $5,000?

If your balance is between $1,000 and $5,000, your old employer can force you into an IRA in your name — a "safe harbor" or "auto-rollover" IRA. These are often parked in money market funds earning near-zero interest. If this happens, roll it to your own IRA promptly.

If your balance is under $1,000, the plan can simply cut you a check. You can still roll it over within 60 days to avoid taxes and penalties.

The Bottom Line