What to Do with Your 401(k) When You Leave Your Job: 4 Options Compared

You've left your job — whether by choice, layoff, or retirement. Now you have a 401(k) sitting with your old employer and four options for what to do with it. The wrong choice can cost you thousands in taxes and penalties. Here's how to decide.

Your Four Options

Option 1: Leave It in Your Old Employer's Plan

Best for: People who like their current plan's investment options, or those between 55-59½ who might need the Rule of 55.

Pros:

• No action required — money stays invested
• Creditor protection (401k has stronger protection than IRA in some states)
• Rule of 55: if you left your job at 55+, you can withdraw penalty-free
• Some plans offer institutional fund classes with lower fees than retail

Cons:

• Limited investment options (whatever the plan offers)
• Can't contribute more
• May have higher fees than a good IRA
• Harder to manage multiple old 401ks across different employers

Option 2: Roll Over to a Traditional IRA

Best for: Most people. Maximum flexibility and investment choice.

Pros:

• Unlimited investment options (stocks, bonds, ETFs, mutual funds)
• Often lower fees (Fidelity, Vanguard, Schwab charge near-zero)
• Consolidate multiple old 401ks into one account
• Easier to manage beneficiaries and estate planning
• No tax impact if done as a direct rollover

Cons:

• Lose Rule of 55 access (can't withdraw penalty-free until 59½)
• Slightly weaker creditor protection in some states
• Complicates backdoor Roth conversions (pro-rata rule)

Option 3: Roll Over to Your New Employer's 401(k)

Best for: People who want simplicity and their new plan has good options.

Pros:

• Consolidation — everything in one place
• Loan provisions (can borrow from 401k, can't from IRA)
• Avoids pro-rata rule for backdoor Roth
• Rule of 55 applies if you leave this employer at 55+

Cons:

• Limited to new plan's investment options
• New plan may have higher fees
• Not all plans accept rollovers

Option 4: Cash Out (Almost Always Wrong)

Best for: Almost nobody. Only consider in extreme financial emergencies.

Cons:

• 20% mandatory tax withholding
• 10% early withdrawal penalty if under 59½
• Taxed as ordinary income (could push you into a higher bracket)
• Lose decades of compound growth

Example: Cashing out $200K at age 45 in the 24% tax bracket: you lose $20K to penalty + $48K to federal tax + state tax. You keep roughly $120K. If you'd rolled it to an IRA instead, that $200K would grow to $775K by age 65. Cashing out cost you $655,000 in future wealth.

The Roth Conversion Opportunity

If you leave your job mid-year and have low income for the rest of the year, consider rolling to a Traditional IRA and then converting some to Roth. You'll pay tax on the conversion, but at a lower rate than usual. This is especially powerful if:

• You're between jobs for several months
• You're retiring early and have low-income years before SS starts
• You want to reduce future Required Minimum Distributions (RMDs)

Use our Roth conversion calculator to see the tax impact of converting different amounts.

How This Affects Your Retirement Plan

Regardless of which option you choose, the money stays invested and growing. In our retirement calculator, add each account on the My Info → Financial Snapshot tab with its type (Traditional 401k, Traditional IRA, Roth IRA, etc.). The tool calculates your total nest egg from all accounts combined.

If you're considering the Rule of 55 for early access, use the early withdrawal penalty toggle on the Plan tab to see how penalty-free access changes your projections.

Step-by-Step: How to Do a Rollover

1. Open an IRA at Fidelity, Vanguard, or Schwab (free, takes 15 minutes online)
2. Contact your old 401(k) provider and request a "direct rollover" to your new IRA
3. Important: Make sure the check is made payable to the new custodian (e.g., "Fidelity Investments FBO [Your Name]"), NOT to you personally
4. Invest the funds once they arrive in your IRA (they may sit in a money market until you choose investments)
5. Update your retirement plan — change the account type from 401k to IRA in our calculator

Common Mistakes to Avoid

• Indirect rollover: If the check is made to you, you have 60 days to deposit it in an IRA or you'll owe taxes + penalties
• Forgetting about old 401ks: Americans have $1.65 trillion in forgotten retirement accounts. Consolidate them.
• Rolling Roth 401k to Traditional IRA: This triggers taxes. Roll Roth 401k to Roth IRA only.
• Not considering the pro-rata rule: If you do backdoor Roth conversions, having a Traditional IRA complicates things

Model the Impact

Use our free retirement calculator to see how your rollover decision affects your long-term plan. Add your accounts with their correct types, and the tool will factor in the appropriate tax treatment and withdrawal rules for each account type.

See your numbers in action

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