401(k) When You Change Jobs: Don't Leave Money Behind

The average worker changes jobs more than ten times over their career. Each time, there's a question most people don't think about until it's too late: what happens to my 401(k)? Make the wrong move — or no move at all — and you could face unnecessary taxes, penalties, or decades of lost growth.

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Your Options When You Leave

When you leave an employer, you generally have four options for your old 401(k):

1. Roll it over to your new employer's 401(k)
2. Roll it over to an IRA
3. Leave it with your old employer's plan
4. Cash it out

Most of the time, options 1 or 2 are the right move. Option 4 is almost always a mistake. Let's walk through each.

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Option 1: Roll Over to Your New 401(k)

If your new employer offers a 401(k), you can transfer your old balance directly into it. This keeps everything consolidated in one place and maintains the tax-deferred status of your savings.

Pros:

• Simple — one account to manage
• Keeps high contribution limits in place
• May allow loans against the balance (if the plan permits)
• Protected from creditors under ERISA

Cons:

• You're limited to the investment options your new employer's plan offers
• Some plans have higher fees than a self-directed IRA

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Option 2: Roll Over to an IRA (Often the Best Move)

Rolling your old 401(k) into a Traditional IRA gives you full control over your investments — including low-cost broad index funds from providers like Fidelity, Vanguard, or Schwab. This is often the most flexible and cost-effective option.

Pros:

• Access to a much wider range of investments
• Ability to choose low-cost index funds with minimal expense ratios
• No dependency on an employer's plan or its fees
• Easy to consolidate multiple old 401(k)s over time

Cons:

• No longer protected by ERISA (though IRAs still have some creditor protections under state law)
• Loses the ability to take plan loans

Jordan's example: Jordan has changed jobs twice and has two old 401(k)s sitting at former employers. She rolls both into a single IRA, picks a low-cost total market index fund, and now manages everything from one account. Her expense ratio drops from 0.85% to 0.03%.

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Option 3: Leave It With Your Old Employer

You're usually allowed to leave your balance in your old employer's plan, at least temporarily. Some plans require you to move it if the balance is below $7,000.

This is a reasonable short-term choice if you're between jobs and haven't decided where to move it. But leaving money scattered across multiple old plans over many job changes creates a fragmented, hard-to-manage retirement picture.

When it makes sense:

• The old plan has excellent, low-cost investment options
• You're planning to roll it over soon and haven't set up a new account yet
• The balance is large enough that the old plan must keep it for you

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Option 4: Cashing Out — Almost Always the Wrong Move

When you cash out your 401(k), the IRS treats the full withdrawal as taxable income for that year. On top of that, if you're under 59½, you owe an additional 10% early withdrawal penalty.

Example: Alex cashes out a $20,000 401(k) balance. He's in the 22% tax bracket.

• Federal income tax: ~$4,400
• 10% penalty: $2,000
• He walks away with roughly $13,600 instead of $20,000

That $20,000, left invested and growing at the historical broad index fund average of 7%* for 30 years, would have grown to over $152,000.

*7% is a historical average for broad index funds, not a guarantee of future returns.

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How to Execute a Rollover: Direct vs. Indirect

There are two ways to move money between accounts:

Direct rollover (recommended): Your old plan sends the funds directly to your new plan or IRA provider. You never touch the money. No taxes withheld. No risk of missing the deadline.

Indirect rollover: Your old plan sends you a check. You have 60 days to deposit it into a new retirement account. The plan is required to withhold 20% for taxes upfront — and you must deposit the full original amount (including the withheld 20%) to avoid treating the shortfall as a taxable distribution.

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Don't Forget to Check Vesting

Before you leave a job, revisit your vesting schedule (covered in Article 8). Your own contributions are always yours — but employer match contributions may not be fully vested yet.

Leaving just before a cliff vesting date could mean forfeiting thousands of dollars in employer contributions. If you're close to a vesting milestone, it may be worth timing your departure accordingly.

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Tracking Down Lost 401(k)s

Changed jobs multiple times and lost track of an old account? It happens more than you'd think. Here's how to find it:

• Contact your old employer's HR department — they can tell you which plan provider holds the account
• Search the National Registry of Unclaimed Retirement Benefits at unclaimedretirementbenefits.com
• Check the Department of Labor's abandoned plan database at dol.gov
• Look for old statements in email archives or physical mail

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Key Takeaways

• When you leave a job, your 401(k) options are: roll over to new 401(k), roll over to IRA, leave it, or cash out
• Rolling to an IRA usually offers the most flexibility and access to low-cost index funds
• Cashing out triggers income tax plus a 10% penalty before age 59½ — and sacrifices decades of compounding
• Always use a direct rollover — never take an indirect rollover if you can avoid it
• Check your vesting schedule before you give notice
• Track down old accounts — scattered 401(k)s are easy to forget and hard to manage

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