Your 401(k) balance is not the employer’s money and never was. It sits in a trust that is legally separate from the company, so creditors cannot reach it in a bankruptcy and a buyer does not acquire it in a sale. Everything you contributed is 100% yours already.
The part genuinely at stake is the employer match you have not yet vested in. On a $20,000 match balance 3 years into a six-year schedule, that is $12,000. If the plan terminates, or if enough people are let go for the IRS to call it a partial termination, that $12,000 becomes yours in full.
Why your balance is safe even if the company is not
Money in a 401(k) is held in a trust that is legally separate from the employer's own assets. That separation is required by ERISA, the federal law governing workplace retirement plans, and it is not a formality. The company does not own the trust, cannot borrow from it, and its creditors have no claim on it.
So the headline answer is simple. If your employer files for bankruptcy, your 401(k) balance does not become part of the estate and is not distributed to creditors. The same is true if the business is sold, wound up, or simply stops trading.
This is worth separating from a related question people often blur into it. The Pension Benefit Guaranty Corporation insures traditional defined benefit pensions, and it does not cover 401(k) plans. That is not a gap: a pension promises a future payment that a failed employer might not make, which is a risk worth insuring. A 401(k) is an account already holding your money, so there is no promise to guarantee.
What can go wrong is narrower and more specific.
What is genuinely at risk
Three things, in order of how much money is usually involved.
The employer match you have not vested in. Your own contributions are always immediately and entirely yours. Employer contributions usually come with a vesting schedule, and leaving before you finish it forfeits the unvested part. In a redundancy this is often the largest sum in play, and it is also the one most likely to be recoverable, for reasons covered below.
Contributions deducted but not yet deposited. Money taken from your pay does not reach the plan instantly. It leaves the employer's payroll account, sits briefly with the employer, and is then deposited into the trust. While it sits there it is not yet protected by the trust, and if the company fails in that window it can be lost.
The Department of Labor requires employers to deposit deferrals as soon as they can reasonably be separated from general assets, with an outer limit of the fifteenth business day of the following month. Plans with fewer than 100 participants have a safe harbour of seven business days. The practical exposure is therefore a few weeks of contributions at most, not your balance.
A match promised for the year but never funded. Some employers deposit the match annually rather than each payroll. A company that fails before making that deposit may simply never make it, and you become an unsecured creditor for it, which in practice usually means nothing.
Your own contributions are always fully yours and are not included here. The law caps employer vesting at a 3-year cliff or a 6-year graded schedule, so anything slower is not permitted and this calculator will not model it.
$8,000
40% vested. $12,000 of employer money would be forfeited, and you are 3 years from keeping all of it.
$20,000
$12,000 more, because a full or partial termination vests affected participants at 100% whatever the schedule says.
How vesting schedules work
The law caps how slowly employer contributions may vest: a 3-year cliff, or a 6-year graded schedule. A plan may be faster and many are. On a $20,000 match balance, the two slowest schedules the law permits look like this.
| Years of service | 6-year graded | 3-year cliff | If the plan terminates |
|---|---|---|---|
| 0 | 0% · $0 | 0% · $0 | $20,000 |
| 1 | 0% · $0 | 0% · $0 | $20,000 |
| 2 | 20% · $4,000 | 0% · $0 | $20,000 |
| 3 | 40% · $8,000 | 100% · $20,000 | $20,000 |
| 4 | 60% · $12,000 | 100% · $20,000 | $20,000 |
| 5 | 80% · $16,000 | 100% · $20,000 | $20,000 |
| 6 | 100% · $20,000 | 100% · $20,000 | $20,000 |
The last column is the same figure on every row. Vesting schedules decide what you keep when you leave an ongoing plan. They do not decide what you keep when the plan itself ends.
The rule that may make your unvested match yours
A full termination is straightforward: the plan closes, and every affected participant becomes 100% vested in employer contributions regardless of length of service.
A partial termination happens without anybody closing anything. If enough participants leave because of employer action, a redundancy round or a division being sold, the IRS treats it as a partial termination and the same 100% vesting applies to those who left.
The threshold is a turnover rate of 20% or more in a plan year, set out in Revenue Ruling 2007-43. It is a presumption rather than a hard line: an employer can argue against it, and the count can accumulate across more than one year. Affected participants generally means anybody who left during that plan year and still has a balance.
For the example above that rule is worth $12,000. It is not a claim you file or a favour you ask for. It is an obligation on the plan, and the reason to know about it is that plans get it wrong, particularly when the employer is distracted by the same event that triggered it.
If you were made redundant in a round that took out a fifth or more of the plan's participants, this is the single most valuable thing on this page. Ask the plan administrator, in writing, whether a partial termination occurred for the plan year in which you left and whether your account was fully vested as a result.
What happens in an acquisition
A sale is not a bankruptcy and the outcomes are different. There are three, and which one applies determines what you can do.
- Your plan continues unchanged. Common when the buyer acquires the company as a going concern and is in no hurry to consolidate. Nothing happens to your account and there is nothing to do.
- Your plan is merged into the buyer's plan. Your balance transfers across, your vesting service usually carries with it, and the investment options change to the new plan's menu. Read what the new menu costs: an involuntary move into a plan with higher fund fees is a real, permanent cost that nobody will flag for you.
- Your plan is terminated. The seller closes the plan, generally before the deal completes. Everybody becomes 100% vested, and termination is a distributable event, so you can roll your balance to an IRA or to a new employer's plan.
The third case is the one to watch, because it puts a cheque within reach. Termination gives you access to the money, and taking it as cash rather than rolling it over means income tax on the whole amount, a 10% penalty if you are under 59 and a half, and mandatory 20% withholding on the way out. A direct rollover avoids all three. There is more on doing that correctly in our guide to direct rollovers.
What to do, in order
- Download your statements now. Before access changes, save your most recent statement and your Summary Plan Description. Portal access can be switched off during a transition and getting records afterwards is far harder than getting them today.
- Check your last few payslips against the plan. Compare what was deducted with what was deposited. A gap is the in-transit exposure described above, and it is also a fiduciary breach worth reporting.
- Find out whether a partial termination applied. In writing, to the plan administrator. See above.
- Do not take a cash distribution by default. A rollover keeps the tax treatment intact. Cash costs you tax, possibly a penalty, and the compounding.
- Watch for the plan going quiet. If nobody is administering the plan and the sponsor has vanished, the Department of Labor's Abandoned Plan Program allows a qualified financial institution to wind it up and distribute the accounts. It exists precisely for this and is worth asking about if a plan has been silent for months.
Where this fits with everything else
If you have left an employer and the plan is still running normally, the ordinary options apply rather than anything on this page: our guide to transferring a 401(k) from a previous employer covers them. For how vesting works in a defined benefit pension, which follows different rules from the ones here, see pension vesting.
And if the reason you are reading this is that your balance has fallen rather than that your employer is in trouble, that is a different problem with a different answer: what to do when your 401(k) is losing money.
How this is calculated
- Vesting maximums. Since the Pension Protection Act a defined contribution plan cannot vest employer contributions more slowly than a three-year cliff or a six-year graded schedule. Many plans are faster. Yours is in the Summary Plan Description and that document governs.
- Graded steps at whole years of service. Somebody eleven months into their third year is on the second year's percentage, which is what a statement will show.
- The calculator excludes your own contributions, because they are never at risk. It models only the employer match, which is the only part a vesting schedule applies to.
- The termination figure assumes you are an affected participant. For a full termination that is everybody. For a partial termination it generally means those who left during the plan year in question.
The 20% turnover threshold and the definition of a partial termination come from IRS guidance on partial plan termination. Deposit deadlines for employee contributions come from the Department of Labor rule on depositing participant contributions.
Frequently asked questions
Can I lose my 401(k) if my company goes bankrupt?
Not your balance. Plan assets are held in a trust that is legally separate from the employer, so creditors cannot reach them. What can be lost is employer match you have not vested in, and any contributions deducted from your pay but not yet deposited when the company failed.
What happens to my 401(k) if my company is acquired?
One of three things: the plan continues as it is, it is merged into the buyer's plan with your balance and usually your vesting service carried across, or it is terminated. Termination makes everybody fully vested and lets you roll the balance over.
Do I become fully vested if I am made redundant?
Not automatically, but often yes. If the redundancy round removed 20% or more of plan participants, the IRS presumes a partial termination, and affected participants must be 100% vested in employer contributions whatever the schedule says. Ask the plan administrator in writing whether a partial termination applied.
Is my 401(k) insured like a bank account?
No, and it does not need to be in the same way. FDIC insurance covers bank deposits against bank failure, and the PBGC insures traditional pensions against employer failure. A 401(k) is an account holding investments that already belong to you, so the protection is the trust structure rather than an insurance scheme. Investment losses are a separate matter and are not insured by anyone.
What if nobody is administering my old plan?
The Department of Labor runs an Abandoned Plan Program for exactly this. A qualified financial institution can take over winding the plan up and distributing accounts when the sponsor has disappeared. If a plan has been unreachable for months, ask about it.
Should I move my 401(k) out as soon as I hear the company is struggling?
Your balance is not the thing at risk, so there is rarely a need to rush. If you are still employed you usually cannot move it anyway. If you have left, a rollover is worth doing on its own merits rather than out of alarm, and doing it calmly avoids the mistake of taking cash and paying tax and a penalty on it.