Most People Have No Idea What They Pay
The numbers on retirement fee awareness are striking. A survey of 500 respondents by automated rollover firm Capitalize found that 71% of 401(k) holders could not identify the total annual costs their plans charge. That’s not a fringe group of disengaged savers. That’s most people enrolled in the most common retirement savings vehicle in the country.
Nearly half of those surveyed estimated that they pay less than 0.5% of total assets in fees. Only about 10% of plans across the country charge fees below 0.4%, creating a wide gap between assumption and reality. The belief that fees are negligible is, for many savers, simply wrong.
About 41% of American workers are not even aware that they pay fees on their 401(k) plans, a 2026 PensionBee study found. The confusion persists even though federal rules require plan sponsors to deliver annual fee disclosure notices to every enrolled participant.
What a 1% Fee Difference Actually Does to Your Balance
The math here is worth sitting with, because it tends to surprise people. A worker with $25,000 saved and 35 years until retirement who earns 7% average annual returns would accumulate $227,000 under a 0.5% fee. Raise the fee to 1.5%, and that same worker retires with only $163,000, a 28% reduction driven entirely by the higher annual cost. No additional contributions are factored into that scenario, which means the entire $64,000 gap comes from compounding fees alone.
Scale that principle up, and the figures become harder to ignore. The Department of Labor’s own guidance is blunt: a 1% difference in annual fees reduces a career-long 401(k) balance by roughly 28%. On a plan that would otherwise grow to $1 million, that is $280,000 handed to the fund company and record keeper instead of the retiree.
The Fee Stack You’ve Never Seen Itemized
Most savers think of fees as one number. In reality, several layers stack on top of each other, and most of them are invisible on your statement. The fee layer includes at least three separate charges: the fund expense ratio, the plan’s administrative and recordkeeping fee (often 0.30% to 0.60% at smaller employers), and any revenue-sharing embedded in the fund lineup.
Hidden fees can add up quickly. You might see a 0.75% expense ratio on your statement, but when hidden fees are included, the actual cost could be closer to 1.25%. Over a 30-year career, that extra 0.50% could cost you over $50,000 on a $100,000 investment.
Revenue-sharing payments are hidden fees paid to 401(k) providers by some mutual funds. Revenue sharing occurs when a mutual fund manager pays or “shares” part of its mutual fund’s fees with the recordkeeper for purposes that are unrelated to the management of the mutual fund, such as a marketing fee. This cost is passed along to you, embedded in your fund’s operating expenses, without any direct disclosure.
Small Plans Pay More Than Large Ones
Where you work has a significant impact on what you pay. According to Morningstar research, plans with assets of $1 million or less pay an average annual fee of 1.26%, while plans greater than $1 billion pay 0.27%. That’s almost a full percentage point difference, based purely on your employer’s size.
Large plans typically charge 0.3% to 0.5%, while small plans often exceed 1%. For employees at smaller companies, the burden is disproportionate and largely invisible. They contribute the same discipline and patience as workers at large corporations, but their fees quietly consume far more of their returns.
The Expense Ratio Is the Most Common Starting Point
The expense ratio is the most visible fee, and also the one most likely to be misread. An expense ratio is the annual cost of managing a fund, expressed as a percentage of the total assets you have invested in that fund. These fees are automatically deducted from your investment, which means they reduce your fund’s performance before you ever see a quarterly statement.
If a fund earns an annual return of 8% and has an expense ratio of 1%, your net return is reduced to 7%. Although this may seem minimal, the cumulative impact over decades of investing can significantly reduce your retirement savings due to the compounding effect of costs.
Average equity mutual fund expense ratios incurred by 401(k) plan participants have fallen by 66% from 0.76% in 2000 to 0.26% in 2024. That’s real progress. Still, the expense ratio is only one of several fee layers, and the total cost picture remains far murkier than that single number suggests.
Forgotten 401(k)s Come With Their Own Fee Problem
Job-hopping has become normal in the American workforce, and with it has come a quiet epidemic of abandoned retirement accounts. As of 2023, there were 29.2 million left-behind 401(k) accounts holding roughly $1.65 trillion in assets, up 20% from two years earlier, according to the latest data by Capitalize.
According to PensionBee’s analysis, a $4.55 monthly nonemployee maintenance fee on top of other costs can add up to nearly $18,000 in lost retirement funds over time. Not only does the monthly fee eat into the principal, but workers also lose the compound growth that would have accumulated on the balance.
Nearly half of employees leave money in their old plans during work transitions, according to a 2024 report from Vanguard. For many of them, those dormant accounts are quietly shrinking, not from bad investments, but from fees that no longer come with any employer contribution to offset them.
Actively Managed Funds Versus Low-Cost Index Funds
One of the clearest cost decisions a retirement saver can make is choosing between actively managed mutual funds and low-cost index funds. Many plans default to actively managed funds with expense ratios well above 1%, even though low-cost index funds are widely available for under 0.10%.
Paying more for high-cost funds is worth it if they deliver higher returns, net of fees, but studies show most don’t over time. The evidence on active fund performance relative to fees has been consistent for years: most actively managed funds underperform their benchmarks after expenses are applied.
A good 401(k) expense ratio benchmark is under 0.10% for index funds, under 0.20% for target-date funds, and under 0.50% for actively managed funds. Comparing what you currently pay against those benchmarks is one of the most practical steps any saver can take.
Litigation Is Rising as Workers Push Back
Retirement fee disputes have been making their way through the legal system with increasing frequency. The common practice of covering plan expenses through revenue sharing embedded in fund fees is becoming less popular as excessive-fee lawsuits targeting 401(k) plans continue to mount. In 2025 alone, there were already 51 such lawsuits, surpassing the 47 filed in 2024 and the 43 in 2023, according to legal services provider Mayer Brown.
More than 600 excessive fee and imprudent investment lawsuits have been filed against ERISA defined contribution plans over the last 10 years, not counting Employee Stock Ownership Plans. These are not obscure cases. Some involve some of the largest retirement plans in the country.
A significant legal development came in April 2025. On April 17, 2025, the U.S. Supreme Court issued a unanimous decision in Cunningham v. Cornell University that eased plaintiffs’ ability to bring cases for 401(k) and retirement account excessive fees. This means cases can now move into discovery, where documents and data about fees and services are revealed, before being dismissed.
What Plan Sponsors Are Legally Obligated to Tell You
Federal law requires that 401(k) participants receive fee disclosures. The Department of Labor’s 408(b)(2) regulations, in place since 2012, mandate that plan service providers disclose their compensation to plan administrators. A separate set of rules requires that participants receive fee-related information annually. In practice, though, while fee disclosures have improved, the information is often complex and buried in lengthy documents.
Employees cannot decode the sophisticated menu of funds offered by their employers, and a majority mistakenly believe that higher fees guarantee higher returns. That belief, unfortunately, is not supported by performance data. Higher fees reflect cost structure, not necessarily quality of management.
How to Find Out What You’re Paying Right Now
Getting a clear picture of your total fee burden is possible, even if it takes a little digging. The first step is to look up the expense ratios of every fund in your account through your plan’s website or prospectus documents. Then add any administrative or recordkeeping fees that may appear as separate line items. If you have $50,000 in your 401(k) and your total fees are 1.2%, your annual cost is $600. Put in your own numbers, and you’ll have a clearer sense of what you’re actually paying each year.
From there, compare your expense ratios against the benchmarks. At year-end 2024, 401(k) plan assets totaled $8.9 trillion, with approximately 70 million active participants across more than 715,000 plans. Even small percentage differences move enormous amounts of money at that scale. At the individual level, the same logic applies: small differences in what you pay each year add up to large differences in what you retire with.
If your plan offers low-cost index funds alongside actively managed options, switching to those lower-cost alternatives is one of the most straightforward ways to improve your long-term outcome. Simply lowering investment expenses on a $1 million portfolio by 0.01% boosts annual portfolio income by more than $200 per year. Larger reductions, naturally, produce much larger gains.
The Quiet Takeaway
Retirement fees don’t announce themselves. They don’t show up as a deduction on your paycheck or appear as a clearly labeled line on your quarterly statement. They work through reduction, slowly trimming your balance’s growth year after year, while you focus on contribution rates and market swings.
The good news is that awareness itself is the first tool. Once you know the fee layers exist, once you understand that the difference between a 0.3% and a 1.3% all-in cost can amount to six figures over a career, you’re in a far better position than the majority of savers. Managing 401(k) fees isn’t just about cutting costs. It’s about safeguarding your financial future.
Checking your fees once is a start. Making it a habit is how you actually protect the money you’ve spent decades building.
AI Disclaimer: This article was created with the assistance of AI tools and reviewed by a human editor.