When you retire, deciding what do you do with a 401k when you retire is one of the most consequential financial moves you will make. According to the Investment Company Institute's 2024 annual report, Americans held approximately $7.4 trillion in 401(k) plans, making these accounts the largest single source of retirement savings for most workers.
The challenge is that your 401(k) was designed for the accumulation phase of your life — not the distribution phase. Once paychecks stop, the rules change entirely. You face required minimum distributions, tax implications, and investment choices that can either preserve your nest egg or erode it.
This article breaks down the five main options for anyone asking what do you do with a 401k when you retire, the tax consequences of each, and the practical steps to execute your choice with confidence.
1. Leave the Money in Your Former Employer's Plan
The simplest option is often overlooked: you can usually do nothing and leave your 401(k) balance right where it is. For many retirees weighing what do you do with a 401k when you retire, staying put removes the pressure of making an immediate decision.
Most plans allow former employees to remain in the plan indefinitely, provided the balance exceeds a minimum threshold — commonly $5,000, though some plans set the bar at $7,000 under SECURE 2.0 rules that took effect in 2024.
Leaving money in place has real advantages. Employer-sponsored plans often negotiate institutional-class fund fees that are lower than what you could get in an IRA. The U.S.
Department of Labor notes that 401(k) plans also carry strong creditor protection under ERISA, which shields your assets from most lawsuits and bankruptcy claims — a protection IRAs do not always match at the federal level.
The downside is control. You are limited to the investment menu your former employer selected. Some plans offer only a dozen funds, and if the plan administrator changes recordkeepers, you may face temporary disruptions.
You also need to track the plan's rules around withdrawals and beneficiary designations, which matters when deciding what do you do with a 401k when you retire.
How to apply this: Contact your plan administrator and request a copy of the Summary Plan Description (SPD). Review the fee disclosure, investment options, and withdrawal rules before deciding to stay put.
2. Roll Over to a Traditional IRA
A rollover to a traditional IRA is the most common answer to what do you do with a 401k when you retire. This moves your money from the employer plan into an individual retirement account that you fully control.
According to data published by the IRS in its 2024 retirement plan statistical summaries, millions of rollovers occur each year, making this the default path for most retirees considering what do you do with a 401k when you retire.
An IRA gives you access to thousands of mutual funds, ETFs, individual stocks, bonds, and CDs. You can shop for lower fees, build a diversified portfolio tailored to your risk tolerance, and consolidate multiple old 401(k) accounts into one place. Major brokerages like Fidelity and Charles Schwab offer rollover IRAs with no account minimums and extensive research tools.
The tax treatment stays the same: the rollover is not a taxable event as long as you complete it within 60 days if done indirectly, or use a direct trustee-to-trustee transfer. The IRS explains that "a direct rollover is not included in your income" — this is the cleanest way to move the money.
Because of this simplicity, financial planners frequently recommend the rollover as the answer to what do you do with a 401k when you retire.
How to apply this: Open a rollover IRA at a low-cost brokerage, then request a direct rollover from your 401(k) provider. Never accept a check made out to you personally if you can avoid it — insist on a trustee-to-trustee transfer.
3. Convert to a Roth IRA
If you anticipate being in a higher tax bracket later in retirement, or you want tax-free withdrawals, a Roth conversion addresses what do you do with a 401k when you retire with a strategic tax move. You roll the 401(k) into a traditional IRA first, then convert some or all of it to a Roth IRA.
Knowing what do you do with a 401k when you retire often comes down to this question: pay taxes now or later?
The catch: you owe ordinary income tax on the converted amount in the year of conversion. The IRS treats a Roth conversion as a taxable distribution. This can push you into a higher bracket if you convert a large balance all at once.
The benefit is substantial for the right person. Roth IRAs have no required minimum distributions during your lifetime, and qualified withdrawals are completely tax-free. The Tax Cuts and Jobs Act of 2017, still in effect through 2025, created historically low tax brackets — a window many financial planners cite as an opportunity for partial conversions.
How to apply this: Work with a CPA or use tax software to model a partial Roth conversion. Convert only enough each year to stay within your current marginal bracket, spreading the tax hit over several years.
4. Take a Lump-Sum Distribution
Cashing out the entire 401(k) in one shot is almost always the worst answer to what do you do with a 401k when you retire — but it is technically an option. The IRS will withhold 20% of the distribution automatically for federal taxes, and the full amount counts as ordinary income in the year you receive it.
The damage compounds quickly. A large lump sum can push you from the 12% bracket into the 22%, 24%, or even 32% bracket. On top of that, if you are under age 59½, a 10% early withdrawal penalty applies. The IRS states this penalty is in addition to regular income tax.
There are narrow exceptions. If your 401(k) balance is small — under $5,000 — the plan may force a distribution anyway. Some retirees with very short life expectancies or urgent medical needs may also consider it. But for most people thinking through what do you do with a 401k when you retire, a lump sum destroys decades of tax-deferred growth.
How to apply this: If you are considering a lump sum, run the numbers through a tax calculator first. Then compare the after-tax result against what a rollover IRA would provide over a 10-year period.
5. Purchase a Qualified Longevity Annuity Contract (QLAC)
A less common but increasingly relevant option for what do you do with a 401k when you retire is using a portion of the balance to buy a QLAC.
The IRS allows you to use up to $200,000 (indexed for inflation; $210,000 in 2025) from your 401(k) or IRA to purchase a deferred income annuity that begins payouts later in retirement — typically at age 80 or 85.
The QLAC amount is excluded from required minimum distribution calculations, which lowers your taxable RMDs in your 70s. This appeals to retirees worried about outliving their money, a core concern behind the question of what do you do with a 401k when you retire.
The trade-off: you give up liquidity on that portion of your savings, and annuity fees can be opaque.
The Treasury Department's regulations on QLACs, finalized in 2014 and updated under SECURE 2.0, set the rules for how these contracts work inside retirement accounts.
How to apply this: If longevity risk keeps you up at night, request QLAC quotes from at least three highly rated insurers. Compare the guaranteed payout rates and read the contract's inflation provisions carefully.
Comparing Your 401(k) Options at a Glance
| Option | Tax Impact | Control Level | Best For |
|---|---|---|---|
| Leave it in the plan | No immediate tax | Low | Low-fee plans, strong creditor protection |
| Rollover to traditional IRA | No immediate tax | High | Most retirees wanting flexibility |
| Roth conversion | Taxable in conversion year | High | Lower-bracket years, legacy planning |
| Lump-sum distribution | Fully taxable + possible penalty | Immediate access | Rare emergencies only |
| QLAC annuity | Tax-deferred, lowers RMDs | Low | Longevity protection |
Frequently Asked Questions About what do you do with a 401k when you retire
Can I move my 401(k) to a new employer's plan after I retire?
Yes, if you take a part-time job or consulting role with a company that offers a 401(k), you can often roll your old balance into the new plan. This preserves ERISA creditor protection and may give you access to institutional funds.
The new plan must accept incoming rollovers — not all do — so check the plan document before initiating anything. It is one more valid answer to what do you do with a 401k when you retire.
What happens to my 401(k) if I retire before age 59½?
The IRS allows penalty-free withdrawals from a 401(k) if you leave your job in the year you turn 55 or later — the "Rule of 55." This applies only to the plan at the employer you just left, not IRAs or old 401(k)s.
If you roll the money to an IRA, you lose this early-access benefit, so weigh that before deciding what do you do with a 401k when you retire early.
Do I have to take required minimum distributions from my 401(k)?
Yes, starting at age 73 (age 75 for those born in 1960 or later, under SECURE 2.0), the IRS requires RMDs from traditional 401(k)s and IRAs. Roth 401(k)s also had RMDs, but starting in 2024, designated Roth accounts in employer plans are exempt from RMDs during your lifetime. Roth IRAs have never had lifetime RMDs.
RMD rules are a key factor in what do you do with a 401k when you retire.
Can I take partial withdrawals from my 401(k) after I retire?
Most plans allow partial withdrawals after separation from service, but some restrict the frequency — for example, one withdrawal per quarter or per year. Others may require you to take the full balance if you withdraw at all.
Review your plan's distribution rules before deciding what do you do with a 401k when you retire, especially if you plan to draw income gradually.
What if my 401(k) has company stock in it?
If your plan holds employer stock that has appreciated significantly, the IRS offers "net unrealized appreciation" (NUA) treatment. You can move the stock to a taxable brokerage account, pay ordinary income tax only on the cost basis, and then pay long-term capital gains rates on the appreciation when you sell.
This can save substantial taxes compared to rolling the stock into an IRA where all withdrawals are taxed as ordinary income. For those wondering what do you do with a 401k when you retire and it holds concentrated stock, NUA deserves a close look.
Conclusion
Deciding what do you do with a 401k when you retire requires weighing taxes, control, fees, and your personal income needs. There is no single answer to what do you do with a 401k when you retire — the right choice depends on your bracket, your timeline, and your goals.
- Leaving money in the plan preserves ERISA protections and institutional pricing, but limits your investment choices.
- A rollover to a traditional IRA offers maximum flexibility and is the right choice for most retirees.
- Roth conversions and QLACs are tactical tools for specific tax and longevity situations.
- Lump-sum distributions should almost always be avoided due to the tax damage.
Your next step is to pull your most recent 401(k) statement, note your balance, fees, and investment options, then schedule a conversation with a fee-only fiduciary financial planner. A one-time planning session typically costs a few hundred dollars and can save you tens of thousands in avoidable taxes over your retirement.
