According to a 2015 study by BrightScope, roughly one in five 401(k) plans had some form of revenue-sharing arrangement where leftover participant fees ended up in the employer's pocket. The amounts can be small per person—0.5% to 1% of assets annually—but over a career, the lost compounding adds up. This practice, known as fee recapture or revenue sharing, is legal under federal retirement law, but most participants have no idea it's happening.

How Fee Recapture Works

To understand fee recapture, you need to understand how 401(k) plans pay their bills. Most plans use a bundled service model: one provider—often a large firm like Fidelity, Vanguard, or Empower—handles recordkeeping, administration, and sometimes investment management. The provider charges a fee, typically a percentage of assets. That fee is deducted from participant accounts. But the provider's actual cost to service the plan might be lower than the fee collected. The difference is a rebate, which the provider sends back to the plan sponsor—the employer.

The employer then has a choice: credit the rebate back to participant accounts, use it to pay plan expenses, or deposit it into its own general account. According to a 2018 survey by the Plan Sponsor Council of America, about 15% of employers used revenue-sharing credits to offset their own plan-related costs, and another 5% kept the money outright. The remaining 80% either returned it to participants or used it to reduce future fees. But that 20% represents millions of workers.

Fidelity and Vanguard, two of the largest 401(k) providers, both offer plans with revenue-sharing features. In a typical Fidelity arrangement, the plan sponsor can choose to have any revenue-sharing credits deposited into a plan-level account that can be used to pay plan expenses or returned to participants. But if the sponsor doesn't explicitly direct the money to participants, it stays with the sponsor. Vanguard's structure is similar: revenue-sharing credits are disclosed in the plan's fee disclosure document, but the default is often that the sponsor keeps them.

Here's a concrete example: Say your plan has $10 million in assets and charges participants 1.2% in total fees. The recordkeeper's actual cost is 0.8%, so there's a 0.4% spread. That's $40,000 a year. If the plan has 200 participants, that's $200 per person per year. Over 30 years, assuming 7% growth, that $200 annual loss compounds to nearly $19,000 per participant. The employer, meanwhile, collects $40,000 annually—or $1.2 million over 30 years—for doing nothing extra.

The Legal Loophole: ERISA's Fine Print

ERISA's fiduciary rules require plan sponsors to act solely in the interest of participants and beneficiaries. But the law does not explicitly address what happens to revenue-sharing credits. The Department of Labor has issued several advisory opinions over the years, but they stop short of banning the practice. In Advisory Opinion 97-15A, the DOL said that revenue-sharing credits could be used to offset plan expenses, as long as the total fees paid by the plan are reasonable. It did not say the credits must go back to participants.

This ambiguity has led to a patchwork of practices. Some plans, particularly those run by large corporations with strong fiduciary oversight, return all revenue-sharing credits to participants. Others, often smaller plans with less oversight, keep the money. A 2021 study by the Employee Benefit Research Institute found that plans with more than $100 million in assets were significantly more likely to return revenue-sharing credits than plans with less than $10 million. That means the workers who can least afford to lose money—those in small plans—are the most likely to be shortchanged.

Litigation over fee recapture is rare, partly because the law is unclear and partly because the amounts per participant are small enough that class-action lawsuits are difficult to sustain. A few high-profile cases have been filed. In 2019, participants sued Pfizer alleging that its plan's revenue-sharing arrangement violated ERISA. The case was settled for $12 million, with the company agreeing to change its practices but not admitting wrongdoing. Most cases, however, never make it that far.

The lack of clarity also means that plan sponsors who want to do the right thing often don't know what's expected. A 2022 survey by the American Benefits Council found that 40% of plan sponsors were unsure whether they were required to return revenue-sharing credits. That uncertainty creates an opening for sponsors to keep the money, especially if their legal counsel advises that it's permissible. The result is a system where participants lose money by default.

One real-world example: the University of Texas System's 403(b) plan had a revenue-sharing arrangement with its recordkeeper. The recordkeeper charged participants 1.25% of assets annually, then rebated 0.50% back to the university. The university used those rebates to fund general operations. Participants were never told. When the arrangement was uncovered by a local newspaper, the university defended it, saying the rebate was disclosed in the plan's fine print. But few participants ever read the fine print.

Why Employers Keep the Money Quiet

You might think that if an employer were pocketing participant fees, it would be disclosed prominently. It's not. The fee disclosure document that you receive annually—often a dense, multi-page PDF—may mention revenue sharing in a footnote. But the language is technical. A typical disclosure might say: "The plan may receive revenue-sharing payments from the recordkeeper, which may be used to offset plan expenses or credited to the employer." That's it. No dollar amounts. No explanation of how much the employer keeps.

Plan sponsors rarely advertise the practice because it doesn't look good. If you asked your HR department, "Are you keeping any of my 401(k) fees?" you'd likely get a vague answer or a referral to the plan document. In a 2017 survey by the Defined Contribution Institutional Investment Association, only 12% of plan sponsors said they would be comfortable explaining fee recapture to participants. That's a sign that they know it's a sensitive topic.

The quiet nature of fee recapture means that most participants never question their fee structure. A 2019 study by the Pew Charitable Trusts found that fewer than one in three 401(k) participants could estimate the fees they paid. And among those who could, most underestimated the amount. The average 401(k) balance in the U.S. is about $106,000, according to Vanguard's 2023 report. At a 1% fee, that's $1,060 a year. If half of that is recaptured by the employer, the participant loses $530 annually. Over 20 years, that's more than $10,000 in lost growth.

The impact is even larger for participants with higher balances. A participant with $500,000 could lose $2,500 a year to fee recapture. Over a 30-year retirement, that's $75,000 in lost compounding. For a couple both working and saving, the combined loss could easily exceed $100,000. That's real money that could have funded a year of retirement or a grandchild's education.

The Real Cost to Your Retirement Savings

The most insidious aspect of fee recapture is that it's invisible. You don't see a line item on your statement that says "Employer kept $200 of your fees." The money just doesn't compound. Over time, the effect is dramatic. A study by the Pew Charitable Trusts found that a 1% fee—including any recaptured portion—reduces the value of a 401(k) by about 28% over 40 years compared to a 0.25% fee. That's the difference between retiring with $500,000 and $360,000.

High-cost plans are more likely to have fee recapture arrangements. A 2020 analysis by BrightScope found that plans with expense ratios above 1.5% were twice as likely to have revenue-sharing credits as plans with expense ratios below 0.5%. That makes sense: if the plan charges high fees, there's more room for a rebate. Unfortunately, high-cost plans are often found in small businesses and nonprofits, where employees have fewer options. A worker at a small company might have no choice but to participate in a plan that siphons off a portion of their savings.

The compounding effect is especially punishing for younger workers. A 25-year-old who loses $500 a year to fee recapture will have about $113,000 less at age 65, assuming 7% returns. That's a whole year of median retirement income gone. For a 35-year-old, the loss is about $52,000. Even for a 45-year-old, it's $22,000. The earlier you start saving, the more fee recapture costs you.

One way to reduce exposure is to choose low-cost index funds within your 401(k). Many plans offer at least one or two index options with expense ratios below 0.10%. If your plan has a self-directed brokerage window, you can invest in even cheaper ETFs. But if your plan's recordkeeping fee is a flat percentage of assets, switching to low-cost funds won't eliminate the recapture—it just reduces the investment management portion. The recordkeeping fee may still be subject to revenue sharing.

How to Check If Your Plan Does This

The first step is to request a copy of your plan's Form 5500. This is an annual filing that the plan sponsor must submit to the Department of Labor. It includes a schedule of fees and expenses. Look for line items labeled "revenue sharing" or "fee recapture." If you see a payment from the recordkeeper to the plan sponsor that isn't offset by an expense, that's a red flag. The Form 5500 is public record, so you can also search for it on the DOL's website.

Next, ask your HR department in writing: "Where do any revenue-sharing credits or rebates from the plan's recordkeeper go? Are they returned to participant accounts or kept by the company?" Get the answer in writing. If the answer is vague, follow up. Some employers may not even know the answer themselves. A 2018 survey by the Plan Sponsor Council of America found that 30% of plan sponsors were unsure whether their plan had revenue-sharing credits.

You can also compare your plan's expense ratios to industry benchmarks. Use free tools like BrightScope or Morningstar's plan ratings. If your plan's total fees are above the median for your plan size—typically 1.0% to 1.5% for small plans—there's a good chance some of that excess is being recaptured. The Department of Labor's fee disclosure form, which your plan must provide annually, lists the total fees you pay. Compare that to the actual cost of the services. If the gap is wide, ask why.

Finally, look at your plan's investment options. If most funds are actively managed with high expense ratios, the plan may be designed to generate revenue-sharing credits. Some plans even have a "revenue-sharing fund" that exists solely to collect and redistribute fees. If you see a fund with a name like "Stable Value Fund" charging 1.5% when comparable funds charge 0.5%, that could be a sign. Do your homework.

What You Can Do to Protect Your Savings

If you discover that your plan is pocketing your fees, you have several options. The most straightforward is to roll over your 401(k) into an IRA when you leave your job. IRAs typically have lower fees and no fee recapture. You can open one at a discount brokerage like Vanguard, Fidelity, or Schwab and invest in low-cost index funds. The rollover is tax-free if done correctly. Just be sure to compare fees: some IRAs have account fees or trading commissions.

If you're still employed and want to stay in the plan, you can lobby your employer to change the fee structure. Start by gathering information. Show your HR department the fees you're paying and the industry benchmarks. Propose that any revenue-sharing credits be returned to participant accounts or used to reduce future fees. Some employers may not realize they're keeping the money. A polite, data-driven request can sometimes lead to change.

You can also propose that the plan adopt fee benchmarking annually. Many large plans already do this. The process involves hiring an independent consultant to compare the plan's fees to those of similar plans. If the fees are high, the consultant recommends changes. Some employers are open to this because it reduces their fiduciary risk. If your plan has a fiduciary committee, ask to have fee benchmarking added to its agenda.

Another option is to use a self-directed brokerage window if your plan offers one. This allows you to invest in a broader range of securities, including low-cost ETFs and individual stocks. The brokerage window may have its own fees, but they're often lower than the plan's standard fees. Check the window's fee schedule before using it. Some plans charge a flat annual fee for the window, which can be worth it if you have a large balance.

Some employers argue that keeping revenue-sharing credits allows them to offer a more robust plan—for example, by subsidizing administrative costs or providing additional services like financial education. In a 2022 survey by the Plan Sponsor Council of America, 18% of employers said they used revenue-sharing credits to fund plan improvements, such as lower-cost share classes or enhanced participant services. This suggests that not all fee recapture is purely profit-seeking. However, critics counter that participants should have the choice to receive those credits directly, rather than having them allocated by the employer. The trade-off is between potential plan enhancements and individual participant returns. If your employer uses recaptured fees to improve the plan, you may benefit indirectly, but you lose the compounding on that money. Transparency is key: ask your employer how recaptured fees are used and whether you have a say.

If none of these options work, one general consideration is to evaluate the total cost of your 401(k) relative to outside options. For example, if your plan's total fees exceed 2% annually and your employer match is low, you might explore whether a taxable brokerage account could be more cost-effective over the long term. However, this decision depends on individual circumstances and should be discussed with a qualified professional. The important thing is to be informed and proactive.

Remember, fee recapture is legal, but that doesn't mean you have to accept it. The more participants who ask questions, the more pressure on employers to change their practices. Some states have considered legislation to require disclosure of fee recapture. California's proposed 401(k) Fee Transparency Act, introduced in 2023, would have required plans to disclose any revenue-sharing credits. It didn't pass, but similar bills may be introduced elsewhere. Public awareness is the first step toward reform.