What Happens to Your 401(k) When Your Employer Is Acquired
An acquisition can change who runs your retirement plan, which funds you can pick and whether you can take the money out. These are the rules the IRS and DOL set.
When your employer is acquired, the money in your 401(k) stays yours. The buyer either keeps your plan, merges it into its own plan, or terminates it. If the plan is terminated, IRS rules require every affected account to become 100% vested, and you can usually roll the balance into the new employer’s plan or an IRA. Your plan administrator’s notices say which route applies.
Nothing about a sale lets the buyer take money you contributed. What can change is who sponsors the plan, which funds you can pick, when you can move money out, and whether unvested employer matches become yours early.
What can happen to my 401(k) plan after an acquisition?
The IRS lists three outcomes on its page about retirement plans when an employer merges with another company: the combined company takes over the existing plan, the two plans are merged, or one or both plans are terminated.
| Outcome | What changes for you | Vesting | Can you take the money out? |
|---|---|---|---|
| Plan kept, new sponsor | Sponsor name and address, possibly funds and fees; you get a notice | Usual schedule continues | Only on a normal distributable event, such as leaving your job |
| Plan merged into buyer’s plan | Account moves to the buyer’s plan; new fund lineup; possible blackout period | Merged plan cannot reduce benefits you already earned | Generally no, while you keep working for the combined company |
| Plan terminated | Assets distributed, usually within a year | 100% vested, regardless of the schedule | Yes, as a distribution you can roll over, unless a successor plan rule applies |
A plan merger cannot cut benefits you have already earned, the IRS says, including your account balance and the payment options attached to it.
Does an acquisition make my employer match fully vested?
An acquisition alone does not, but a plan termination does. When a plan terminates, “the accrued benefits of all affected employees must become 100% vested,” according to the IRS, no matter what the vesting schedule says. Your own salary deferrals are always 100% vested.
Layoffs around a deal can also trigger full vesting. If 20% or more of plan participants leave because of employer-initiated cuts during a plan year, the IRS presumes a partial termination, and everyone who left in that period must be fully vested in their accounts. The employer can try to rebut the presumption, so the outcome is decided case by case. If you were laid off around a sale with an unvested match, ask the plan administrator whether a partial termination was found.
Can I roll over my 401(k) if the plan is terminated?
Usually yes. A terminated plan pays out balances, and you can move the money to an IRA or, if it accepts rollovers, the new employer’s plan.
There is one exception for 401(k) salary deferrals. If the same employer keeps another defined contribution plan (a “successor plan”), IRS rules generally bar paying out deferrals because of the termination. The money is then transferred to the other plan or stays put until you leave or reach another distributable event.
How the rollover is done matters, based on IRS rules for rollovers of retirement plan distributions:
- Ask for a direct rollover (plan pays the IRA or new plan). No tax is withheld.
- If the check is paid to you instead, the plan must withhold 20% for federal tax.
- You then have 60 days to deposit the full amount, including the 20% from your own pocket, to avoid tax on that portion.
- Any part not rolled over is taxable income, and if you are under 59 1/2 it may also face a 10% additional tax unless an exception applies.
What happens to company stock held in my 401(k)?
Shares of your employer held in the plan are treated like any other shares in the deal. In a cash deal, the plan’s company stock fund receives cash; in a stock deal, it receives buyer shares at the exchange ratio.
The plan’s notice to participants says where cash from the stock fund is invested and whether the fund stays open. If your plan had a company stock fund, check your statement after closing to see where the money landed. Our guide to what happens to your shares in a merger covers the exchange itself.
Will I lose access to my 401(k) during the transition?
You may face a short blackout period when accounts move to a new recordkeeper or plan. Under Department of Labor rules, a blackout that suspends your ability to change investments, take loans or take distributions for more than three consecutive business days generally requires notice at least 30 days in advance (DOL: What You Should Know About Your Retirement Plan).
The notice must list the dates and the rights being suspended. If you have an outstanding 401(k) loan, ask how repayment works during and after the switch, since loans that are not repaid can be treated as taxable distributions.
What should I ask HR or the plan administrator?
- Is the plan being kept, merged or terminated, and on what date?
- If terminated, is there a successor plan that blocks payout of my deferrals?
- Does the termination or any layoff make my match fully vested?
- When does the blackout start and end?
- Will my loan transfer to the new plan?
- When can I join the buyer’s plan, and is there a match from day one?
Equity awards follow separate rules; see our guides on stock options in an acquisition and your ESPP in an acquisition.
Bottom line
Download a full account statement showing vested and unvested balances before any blackout begins, because that record is what you would use to check a later vesting or partial-termination dispute. Federal pension insurance from the PBGC covers traditional pensions, not 401(k) accounts, so your 401(k) balance depends on the investments in it.
FAQ
Can the buyer take away my 401(k) money?
No. Your account belongs to you, and a plan merger cannot reduce benefits you have already earned. The buyer can change fund options, fees and future matching contributions.
Do I have to roll over my 401(k) after an acquisition?
Only if the plan is terminated and pays out balances. If the plan is kept or merged, your account simply moves with it.
Is my unvested match lost if I am laid off before the deal closes?
Not always. A plan termination vests everyone affected, and layoffs of 20% or more of participants can create a presumed partial termination that vests those who left. Ask the plan administrator in writing.
Will I get notice before my 401(k) changes?
Yes. A new sponsor must notify participants of its name and address, a terminating plan generally notifies all participants, and a blackout of more than three consecutive business days generally requires notice at least 30 days ahead.
