401(k) Fees: How Much Am I Really Paying? - 0.99% vs 3.77%
Last spring I finally opened the envelope.
Not the statement — the other one. The boring one titled something like "Annual Participant Fee Disclosure" that shows up once a year and goes straight into the recycling.
I had been contributing to a 401(k) for years and I could not have told you, within a factor of five, what it cost me.
Have you actually opened yours?
If not, you're in enormous company, and there's a very specific reason for it: 401(k) fees are designed to be invisible. Not illegal, not hidden in the criminal sense — just deducted in a way that never shows up as a line item you can see.
Here's the part that got my attention, and it isn't a survey stat. It's audited data. Two 401(k) plans with 50 participants and $500,000 in assets — same size, same shape — were priced anywhere from 0.99% to 3.77% a year. Nearly a 4x spread. Which one you're in has nothing to do with how smart a saver you are. It depends on which vendor your employer's HR director signed with, possibly before you were hired.
Let's go find your number.
Why does one 50-person 401(k) plan cost 0.99% and another 3.77%?
Because the price is set by your employer's purchasing decision, not by you — and there's no sticker price anyone has to advertise.
That 0.99%-to-3.77% range comes from the 401k Averages Book, a commercial benchmarking publication sold to advisers (worth disclosing — it's an industry product, not a regulator's report). Its 25th edition, published June 2025, priced a standard 50-participant plan with $500,000 in assets and found total plan costs spanning that entire range depending on the provider.
Put it in dollars, because percentages don't hurt enough.
On $500,000 of plan assets, 0.99% is about $4,950 a year. 3.77% is about $18,850 a year. The gap is roughly $13,900 a year, coming out of 50 people's retirement accounts. Spread evenly, that's about $278 per person per year — on an average account of only $10,000.
(Simple one-year arithmetic: percentage times balance. No compounding, no contributions.)
Two people doing the exact same job, saving the exact same amount, at two companies across the street from each other. One is paying nearly four times the other. Neither has any idea.
That's the actual story here. Not "fees are rising" — they're not, as you'll see. The story is dispersion.
How much am I actually paying in 401(k) fees?
The honest answer: it depends almost entirely on how big your employer's plan is, and the range runs from about 0.25% to about 1.47% a year.
The best public dataset on this is the ICI/ISS MI Defined Contribution Plan Profile, built from 49,234 audited Form 5500 filings covering $6.3 trillion in 401(k) assets (2023 plan year, published March 2026). "Total plan cost" there means the all-in number — asset-based investment management fees, administrative and advice fees, and other charges pulled from audited financial statements.
Here's what it found for 2023:
| Plan assets | Total plan cost (2023) | On a $100,000 balance |
|---|---|---|
| Less than $1M | 1.47% | $1,470/yr |
| $1M–$10M | 0.97% | $970/yr |
| $10M–$50M | 0.70% | $700/yr |
| $50M–$100M | 0.54% | $540/yr |
| $100M–$250M | 0.42% | $420/yr |
| $250M–$500M | 0.38% | $380/yr |
| $500M–$1B | 0.33% | $330/yr |
| More than $1B | 0.25% | $250/yr |
| All plans | 0.74% | $740/yr |
(Dollar column is my own one-year arithmetic on a hypothetical $100,000 balance, for scale.)
Three numbers from that report worth memorizing:
- The average plan cost 0.74% of assets.
- The average participant was in a plan costing 0.48%.
- The average dollar sat in a plan costing 0.30%.
Those three differ because most plans are small, but most people and money are in big plans. Big plans are cheap.
And the spread inside that average is brutal. Across all plans, 10% cost 0.28% or less, and another 10% cost 1.26% or more. On a $100,000 balance that's $280 a year versus $1,260 a year — a $980 annual difference for doing the exact same thing.
One more thing that surprises people: fees have collapsed, not risen. The asset-weighted average expense ratio for equity mutual funds held in 401(k)s fell from 0.76% in 2000 to 0.26% in 2024 — a 66% decline. Target date mutual funds went from 0.67% in 2008 to 0.29% in 2024. Total plan cost dropped from 1.02% in 2009 to 0.74% in 2023.
So no, nobody is quietly jacking up your fees. The problem is that the cheap end got dramatically cheaper while the expensive end stayed expensive, and nothing tells you which end you're on.
Why doesn't my 401(k) statement show a fee?
Because most of what you pay is subtracted from your investment returns before the return is ever reported to you.
The IRS groups retirement plan charges into three buckets — plan administration fees, investment fees, and individual service fees — and then says the quiet part in writing: administration and investment fees "can be deducted from the account either as a direct charge or indirectly as a reduction of the account's investment returns."
That second path is the whole trick. Think of it like a restaurant where the tip is already baked into the menu price. You paid it. You just never saw a line for it.
In practice you're paying up to three stacked layers:
Layer 1 — the fund's expense ratio. Taken out daily inside the fund's share price. It will never, ever appear as a debit on your statement.
Layer 2 — plan administration / recordkeeping. Might be a flat dollar amount per head, might be a percentage of assets, might be paid by your employer, might be paid out of plan assets. This is the layer that varies most between employers.
Layer 3 — revenue sharing. A slice of the fund's expense ratio gets rebated back to the recordkeeper. It has two common names: 12b-1 fees (to the broker) and sub-transfer agency fees (to the 401(k) provider for recordkeeping).
Layer 3 is why some plans look free. If revenue sharing covers the recordkeeping bill entirely, your employer sees "$0 administration cost" — and the money comes out of your returns instead.
How big can Layer 3 get? In an older edition of the 401k Averages Book (2020 reporting on 2019 pricing — genuinely historical, don't treat it as today's number), a 100-participant/$5M plan's total cost broke down as 52% revenue sharing, 41% investment, 6.5% recordkeeping. Revenue sharing ran as high as 1.19% in the smallest plans and as low as 0.16% in larger ones.
More than half the cost, invisible by design.
How much do 401(k) fees cost me over 30 years?
The Department of Labor's own published example says a 1 percentage point difference cuts your final balance by about 28%.
Here it is verbatim from A Look at 401(k) Plan Fees, the DOL's participant booklet:
A worker with 35 years until retirement and a $25,000 balance today, earning 7% a year, with fees reducing returns by 0.5%, ends up with about $227,000. If fees are 1.5% instead, the same worker ends up with about $163,000.
The gap is $64,000 — 28% of the final balance.
Read the assumptions carefully, because almost every article that quotes this number drops them:
- Starting balance: $25,000
- No further contributions at all — this is one lump sum left to grow
- 35 years, 7% gross return
- Fee difference: exactly 1.0 percentage point
That "no further contributions" line matters. This is a clean illustration of what a fee gap does to money that's already there — not a projection of your career.
One caution before you go looking for scarier versions of this. You'll find headlines like "a $500,000 401(k) can lose $140,000 to hidden fees." That $140,000 is just 28% of $500,000 — the DOL's ending-balance percentage applied to a current balance, which is not what the DOL example says. I also found a widely republished illustration ("$829,000 vs $669,000, a gap of roughly $214,000") where the two figures differ by $160,000, not $214,000, and neither endpoint reconciles with the stated assumptions. Skip those. The DOL numbers hold up; the recycled ones often don't.
Where do I find my 401(k) fee disclosure?
Four documents. Two are mailed to you by law, one goes to your employer, and one is public record for every plan in America — including the company you're interviewing at.
This is the part almost nobody knows, so I'm going to be specific.
Step 1 — Your annual fee disclosure, ERISA § 404(a)(5)
Under 29 CFR § 2550.404a-5, your plan administrator must give every eligible participant, at least once a year, three things: general plan information, administrative expenses (legal, accounting, recordkeeping — the ones not inside expense ratios) and how they're allocated to your account, and individual expenses (loan processing, advice, brokerage windows).
Plus, for every single investment option in your menu:
- 1-, 5-, and 10-year average annual returns
- Total annual operating expenses as a percentage AND as dollars per $1,000 invested
- A benchmark index comparison
- All of it in a comparative chart, side by side
That comparative chart is the single most useful page in your entire benefits packet. It's usually titled something like "[Plan Name] Investment and Fee Notice." Search your email for "fee notice" or "annual disclosure" right now — it's probably sitting there.
Step 2 — Your quarterly statement (the actual dollars)
The same regulation requires a quarterly statement showing the dollar amount of fees and expenses actually charged to your account in the previous quarter, plus a description of what those charges were for.
Actual dollars. Last quarter. Multiply by four.
That, plus the expense ratios from Step 1, gets you very close to your real all-in number.
Step 3 — The document you were never sent: ERISA § 408(b)(2)
The 408(b)(2) service provider fee disclosure goes from the recordkeeper to your employer's plan fiduciaries — not to you. It exists so plan sponsors can judge whether the deal is reasonable.
The difference matters:
| 408(b)(2) | 404(a)(5) | |
|---|---|---|
| Who gets it | Plan sponsor / fiduciaries | You |
| How often | Once at contract, then on material change | Annually + quarterly dollar statement |
| What's in it | Direct and indirect compensation (revenue sharing, 12b-1, sub-TA) | Plan-level and investment-level fees |
| Penalty if missed | Prohibited transaction — may require returning compensation plus excise tax | Fiduciary breach, no specific statutory penalty |
Here's the irony: the document that itemizes revenue sharing is the one you don't receive. Nothing stops your employer from sharing it, though. You can ask HR or the plan committee. You just can't demand it.
Step 4 — Form 5500 on EFAST2: the public back door
Every ERISA-covered plan files a Form 5500 every year, and those filings are public record, all-electronic since 2010.
- Go to efast.dol.gov and open Form 5500 Search.
- Search by plan name, company name, or EIN (most precise).
- Open the filing and go to Schedule C — "Service Provider Information." That's where service provider compensation, including indirect compensation, is reported.
- It's free. No login.
Yes, this means you can look up any employer's plan. The company you're interviewing with. Your spouse's employer. A competitor. Almost nobody does this, and it's a genuinely useful thing to check before accepting an offer.
Two limits to know: Schedule C is generally only required of large plans (100+ participants) — small filers using Form 5500-SF report much less. And ICI/ISS MI notes that Form 5500-derived averages are "not intended for benchmarking the costs of specific plans," so treat it as directional.
Even with all four documents, the disclosures aren't perfect. The GAO reviewed samples from 10 large plans and found the disclosures aren't required to include fee benchmarks or ticker symbols, which makes it genuinely hard to tell whether your options are reasonably priced. GAO made five recommendations to DOL — consistent terminology, quarterly actual-dollar disclosure, cumulative fee effects, benchmarks, ticker symbols. I found no reporting that these have been adopted into a final rule, so don't assume they have.
That viral 401(k) fee stat? Check who paid for the survey.
Here's a statistic making the rounds in 2026: nearly half of 401(k) holders think they pay under 0.5%, but only about 10% of plans actually charge below 0.4%.
I almost opened this article with it. Then I traced it.
It comes from a survey of 500 people, run by Capitalize — a for-profit company that sells 401(k)-to-IRA rollovers. Not the DOL, not the GAO, not ICI. A company whose business model improves every time you conclude your workplace plan is a ripoff. No margin of error or panel methodology was published in the coverage I could find.
And the "only ~10% of plans charge below 0.4%" part is Capitalize's own estimate, with no published methodology — and it conflicts with the audited data.
Remember the ICI/ISS MI figures from 49,234 audited plans? The 10th percentile total plan cost is 0.28%. If one in ten plans is at or below 0.28%, then substantially more than 10% of those plans come in under 0.4%. The vendor number doesn't hold for that universe.
To be fair to Capitalize: the ICI/ISS MI sample only covers plans with audited filings, which generally means 100+ participants. There are hundreds of thousands of tiny plans with much higher costs that aren't in it. So their 10% could conceivably be defensible on a raw plan count while being clearly wrong for the plans most people are actually in.
The better-sourced version of the same hook is more useful anyway: half of surveyed people guess they pay under 0.5%, and the median large plan costs 0.66% while 10% of plans cost 1.26% or more.
There's a second sourcing problem in the same news cycle. The often-quoted stat that 41% of American workers believe they pay no 401(k) fees at all got attributed in July 2026 coverage to "a 2026 PensionBee study." That's wrong. The 41% is GAO-21-357, a nationally representative government survey published in 2021 — and PensionBee's own 2026 report cites GAO for it rather than claiming it. The GAO study is the stronger citation anyway: alongside the 41%, it found 40% didn't fully understand fee information and 45% couldn't use their own disclosure to work out what an investment actually cost them.
Same lesson both times: before you believe a number about your money, look at who benefits from you believing it.
Honestly, a high number isn't automatically a reason to bail
I want to be careful here, because "your fees are eating your retirement" is a sales pitch as often as it's advice.
A high total plan cost is not, by itself, a reason to move money out. Large plans buy institutional share classes retail investors can't touch. An employer match dwarfs almost any fee difference — a 50% match is a 50% instant return that no expense ratio can undo. And 401(k)s carry creditor protections and loan access that IRAs don't.
Notice, too, who's loudest about rollovers. Capitalize, PensionBee, Beagle, Mezzi — these are rollover businesses that earn revenue on the transaction. An IRA is not automatically cheaper. You have to compare the IRA's actual fund lineup and any advisory wrap fee against your plan's total cost, and rolling out forfeits those institutional share classes.
So what actually helps?
1. Move to the cheapest share classes already in your menu. This is the highest-leverage move and it needs nobody's permission. Index funds inside 401(k) plans averaged 0.06% in 2023 versus 0.31% for domestic equity funds overall. On a $100,000 balance that's $60 a year versus $310 a year — same market exposure, $250 back in your pocket annually.
2. Read the comparative chart in your 404(a)(5) notice. Every option's cost, as a percentage and as dollars per $1,000, on one page.
3. Ask HR for the 408(b)(2) disclosure. That's where revenue sharing is itemized.
4. If you're 59½ or older, ask about in-service rollovers. Many plans use 59½ as the threshold for moving money to an IRA while still employed, without taxes or penalty — but some plans allow only certain money sources, and some block in-service rollovers entirely until you leave. The controlling document is the plan document. You have to ask the plan administrator.
And if you're wondering whether raising this with HR makes you a nuisance — it doesn't. Plan fiduciaries are legally required to ensure fees are reasonable for the services provided. Over 500 excessive-fee lawsuits have been filed against ERISA plans since 2016, with settlements exceeding $1 billion in aggregate over the past decade. UnitedHealth settled for $69 million covering more than 350,000 participants; General Electric settled for $61 million before that.
An email asking what the plan's total cost is raises exactly the issue that has produced a billion dollars in settlements. Employers take it seriously.
Frequently asked questions
Q. How do I find out what my 401(k) fees are?
A. Start with your annual participant fee disclosure (required under 29 CFR § 2550.404a-5) — it lists every fund's expense ratio as a percentage and as dollars per $1,000. Then check your quarterly statement, which by regulation must show the actual dollar amount deducted from your account last quarter. Those two documents together cover almost everything except revenue sharing already netted inside expense ratios.
Q. What is a reasonable 401(k) expense ratio?
A. Commercial financial sites commonly use the rule of thumb that under 0.5% is good, 0.5%–1% is average, and above 1%–1.5% is high — but those are marketing sites, not regulators, so use them loosely. The regulator-grade benchmarks are better: the average plan cost 0.74% in 2023, the average participant was in a plan costing 0.48%, and the average dollar sat in a plan costing 0.30%. Index funds inside 401(k)s averaged 0.06%.
Q. Is a 1% 401(k) fee too high?
A. It's above average but not extreme. In 2023, 10% of audited plans cost 1.26% or more, so 1% sits in the upper range without being an outlier. It depends heavily on plan size — 1% is unremarkable for a plan with under $10M in assets (average 0.97%) and very expensive for a plan over $1B (average 0.25%).
Q. Can I look up another company's 401(k) fees?
A. Yes. Every ERISA-covered plan files a public Form 5500. Search by company name or EIN at efast.dol.gov and read Schedule C for service provider compensation. Schedule C detail is generally only required of plans with 100+ participants.
Q. Should I roll over my 401(k) to an IRA to avoid fees?
A. Not automatically. Compare the IRA's actual fund costs and any advisory fee against your plan's total cost first, and remember that large plans often offer institutional share classes unavailable retail. Also note that the companies most loudly recommending rollovers earn revenue when you do one.
Q. Do 401(k) fees come out of my balance or my employer's pocket?
A. Both are allowed. Per the IRS, plan administration and investment fees can be deducted from your account either as a direct charge or indirectly as a reduction of your investment returns. Which one applies to you is spelled out in your annual fee disclosure.
One thing to do before your next paycheck
Don't overhaul anything. Just find one number.
Search your email for "fee disclosure" or "fee notice." Open the comparative chart. Look at the expense ratio next to the funds you actually own, and look at the cheapest index option in the same menu.
If the gap is 0.25 percentage points, that's $250 a year on a $100,000 balance — for identical market exposure.
That's it. That's the whole assignment. Ten minutes, one document, and you'll know something about your own money that, per the GAO, 41% of American workers currently believe doesn't exist.
Then tell me where you landed:
- Under 0.5% — cheap plan, nice work
- 0.5% to 1% — right around average
- Over 1% — worth an email to HR
- Still can't find the document
Drop your number in the comments. I'm genuinely curious how wide the spread runs among people reading the same article.
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