An estimated 31.9 million 401(k) accounts worth around $2.1 trillion are currently sitting abandoned at former employers as of 2025, with the number expected to grow to 32.8 million accounts by 2026. These aren’t accounts that have been forgotten forever—they’re accounts that workers left behind when they changed jobs, often without realizing the money was still there or understanding what they needed to do to reclaim it. The $1.65 trillion figure frequently cited represents accounts from 2023, but the real number today is significantly higher.
For example, a 45-year-old worker who left a $65,000 401(k) at a company five years ago and never rolled it over is likely still paying administrative fees on that money, watching it slowly dwindle while earning minimal returns. These forgotten accounts represent approximately 25 percent of all 401(k) plan savings in the United States, making them a major financial blind spot for millions of workers. Between three and four million new accounts are abandoned each year as people change jobs, and far too many never retrieve them. The problem has grown so severe that the federal government stepped in with a dedicated database to help people locate lost retirement accounts, yet even with this tool, many Americans remain unaware that their money is still waiting for them.
Table of Contents
- How Much Money Is Trapped in Forgotten 401(k) Accounts at Your Former Employer?
- The Hidden Cost of Forgotten Accounts: Up to $115 Billion Annually in Lost Value
- How Many People Are Leaving 401(k)s Behind, and Where Is the Growth Happening?
- The Labor Department’s New Database: Can It Help You Find Your Money?
- Why Forgotten Accounts Are Risky and What Can Go Wrong
- What Happens to Your 401(k) When You Leave Your Job?
- Protecting Your Retirement Savings: Prevention and Future Policy Changes
- Conclusion
How Much Money Is Trapped in Forgotten 401(k) Accounts at Your Former Employer?
The sheer size of forgotten retirement assets is staggering. As of 2025, approximately 31.9 million accounts contain $2.1 trillion in assets, with projections showing 32.8 million accounts by the end of 2026. The average balance in these abandoned accounts ranges from $56,616 to just under $70,000, depending on the data source and time period measured. To put this in perspective, this one category of forgotten money represents more wealth than the gross domestic product of most countries.
A single worker with a $65,000 abandoned account is sitting on a significant nest egg that could be earning returns in a self-directed IRA or a new employer’s plan. What makes this figure even more striking is how much of the overall retirement system it represents. These forgotten accounts constitute roughly 25 percent of the total assets held in 401(k) plans nationwide. This isn’t pocket change that most people can afford to overlook—for many workers, especially those in their 50s and 60s, these funds could represent years of retirement income. The gap between what people think they have saved and what they actually have saved can be measured in hundreds of thousands of dollars when you account for this forgotten money across a worker’s entire career.
The Hidden Cost of Forgotten Accounts: Up to $115 Billion Annually in Lost Value
Abandoned 401(k)s don’t just sit static and waiting; they actively lose value through administrative fees and underperformance. The total annual cost to savers from higher fees and lower investment returns on forgotten accounts reaches as much as $115 billion per year. This isn’t a one-time hit—it’s money draining away year after year, compounding losses that most workers never see until it’s far too late. Consider a concrete example: a typical abandoned 401(k) might charge $4.55 per month in administrative fees.
Over 30 years, that single fee compounds to more than $1,600 in direct costs, not counting the opportunity cost of what that money could have earned if invested elsewhere. A worker with a $70,000 forgotten account paying this fee would watch nearly 2.3 percent of their balance disappear to fees alone each year. Many abandoned accounts earn significantly lower investment returns because they’re often parked in conservative, low-yielding money market funds or stable value funds, which offer minimal growth. The combination of fees and underperformance can mean losing 3 to 4 percent annually—money that will never be recovered.
How Many People Are Leaving 401(k)s Behind, and Where Is the Growth Happening?
The number of forgotten accounts is growing at an alarming rate. In 2023, approximately 3.5 million accounts were abandoned as workers changed jobs. By 2024, that number jumped to 4 million accounts. Projections for 2025 suggest another 4.2 million accounts will be left behind—suggesting this trend shows no signs of slowing.
Job mobility remains high, particularly among younger workers, and many people don’t understand that their 401(k) money doesn’t automatically follow them to a new employer. Federal workers represent a particularly large segment of this problem. The federal government’s Thrift Savings Plan, which serves federal employees and military personnel, is expected to have 2.8 million abandoned accounts by the end of 2025—a 14 percent increase from 2024. This growth among TSP accounts underscores the fact that forgotten retirement accounts affect both private sector and government workers alike. The pattern is clear: job transitions are increasing, and education about what happens to 401(k)s when workers change jobs is lagging far behind the rate at which accounts are being abandoned.
The Labor Department’s New Database: Can It Help You Find Your Money?
In December 2024, the U.S. Department of Labor launched the Retirement Savings Lost and Found Database, a government resource designed specifically to help workers locate abandoned 401(k)s, pensions, and other workplace retirement accounts. This database was created under authority of the SECURE 2.0 Act of 2022, which recognized that millions of Americans needed help finding accounts they had long forgotten about. You can access this database through the Department of Labor’s Employee Benefits Security Administration website.
Early results suggest the database is helping. Of 236,269 unique visitors between the database’s launch in December 2024 and the end of 2025, 69,712 people found an old 401(k), pension, or workplace retirement plan—a 29.5 percent success rate. However, the database has a significant limitation: it was initially restricted to people age 65 and older at launch, which excludes younger workers who may have even more years of lost earnings ahead of them. Even with this government tool available, many people don’t know it exists, and others don’t realize they have forgotten accounts waiting for them until they’re much closer to retirement.
Why Forgotten Accounts Are Risky and What Can Go Wrong
Forgotten accounts are vulnerable to several risks that many workers don’t anticipate. First, there’s the fee problem—abandoned accounts often charge higher fees than active accounts or may shift automatically into conservative investments that provide minimal growth. Second, the longer money sits in an abandoned account, the less likely you are to remember details like the exact amount, the plan administrator’s name, or the vesting schedule. These details become crucial when you eventually try to retrieve or roll over the money.
There’s also the risk of account liquidation. Some plans have rules that allow them to involuntarily distribute accounts below a certain balance (often $5,000) if the account owner cannot be located. In those cases, your money might be sent to your last known address, transferred to a state’s unclaimed property program, or even paid out as a taxable lump sum without your knowledge. If the distribution goes to unclaimed property, you’ll need to file a claim with your state to retrieve it—an additional step that can take months. The limitation here is significant: once an account is liquidated or transferred, it becomes far more complicated to track down and recover your money.
What Happens to Your 401(k) When You Leave Your Job?
When you change jobs, you have several options for your 401(k), and choosing wisely is crucial. You can roll the money into an IRA, transfer it to a new employer’s plan (if that plan allows it), leave it at your former employer’s plan, or cash it out. Most financial advisors recommend either rolling it to an IRA or transferring it to your new employer’s plan, as both options give you more control and typically lower fees. However, many workers do nothing, and their account simply sits dormant.
If your account falls into unclaimed property status—which varies by state but typically happens after a period of inactivity like three to five years—your state’s treasury department may take custody of the money. This doesn’t mean your money is lost, but it does mean an extra step is required to recover it. You’ll need to file a claim with your state’s unclaimed property program, which can be done online in most states. The key difference between leaving money at your former employer versus letting it become unclaimed property is that unclaimed property claims can be more time-consuming and may require more paperwork, though the money itself is still rightfully yours.
Protecting Your Retirement Savings: Prevention and Future Policy Changes
The best defense against forgotten accounts is to keep track of all your retirement savings and make intentional decisions about where that money goes whenever you change jobs. Within 60 days of leaving a job, contact your old plan administrator and decide whether you want to roll over the money. Document the details, including the plan administrator’s contact information, your account number, and the current balance. A simple spreadsheet listing every 401(k), IRA, and retirement account you have ever had—with the plan name, provider, and account number—can save you significant headache and money later.
Looking ahead, policy is beginning to change in ways that may help workers. The Department of Labor’s Lost and Found Database represents the first significant federal effort to aggregate this information in one searchable location. Future expansions of this database may lower the age restriction, include more plan types, and reach more workers. Meanwhile, some states are strengthening their unclaimed property laws and making it easier to search for and claim abandoned retirement accounts. The trend is toward making it easier to find forgotten money, though awareness remains the biggest barrier.
Conclusion
Forgotten 401(k) accounts represent one of the largest and most accessible sources of unclaimed money in America. With an estimated $2.1 trillion sitting in 31.9 million abandoned accounts as of 2025, countless workers are losing money every year through fees and underperformance on accounts they may have completely forgotten about. The problem grows every year as millions more workers abandon accounts during job transitions. Your next step is straightforward: take inventory of every employer-sponsored retirement account you’ve ever had.
Use the Department of Labor’s Lost and Found Database if you’re unsure whether you have money waiting for you. If you find an old account, decide whether to roll it into an IRA, transfer it to your current employer’s plan, or leave it where it is—but make an active decision rather than letting your money languish. For those whose accounts have already been transferred to state unclaimed property, begin a claim process through your state’s treasury department. Your forgotten money is still yours; you just need to claim it.