401(k) Fee Audit in 2026: Find Hidden Retirement Costs

How to Audit Your 401(k) Fees in 2026: Find Expense Ratios, Recordkeeping Charges, and Hidden Plan Costs

A 401(k) fee audit helps answer a basic question: How much of your retirement account is being spent each year on investments, administration, advice, and optional services? The answer is rarely contained in one place. Investment expenses may be deducted inside a fund, recordkeeping charges may appear on quarterly statements, and transaction fees may apply only when you take a loan or distribution.

The goal is not necessarily to find the cheapest plan or fund. It is to identify what you pay, understand what you receive, and compare the cost with reasonable alternatives. The following process can help you complete a practical 401(k) fee audit in 2026.

Why a 401(k) Fee Audit Matters

Fees reduce the amount of money that remains invested and able to compound. A difference that looks minor over one year can become significant over several decades.

For example, assume you begin with $100,000, make no additional contributions, and earn a hypothetical 6% annual return before fees:

Annual fee	Approximate net return	Balance after 20 years	Balance after 30 years
0.50%	5.50%	$291,800	$498,400
1.00%	5.00%	$265,300	$432,200
Estimated difference	0.50 percentage point	$26,500	$66,200

This is an illustration, not a forecast. It assumes constant returns, annual fee deductions, no taxes, and no deposits or withdrawals. Actual investment returns and fee calculations will vary.

Start by separating fees into three broad categories:

Investment expenses: Costs deducted within mutual funds, collective investment trusts, target-date funds, stable-value products, and other investments.
Plan administration expenses: Recordkeeping, custody, compliance testing, legal work, accounting, participant communications, and plan audits.
Individual service fees: Charges linked to actions such as taking a loan, processing a distribution, reviewing a domestic-relations order, or using managed-account advice.

A higher fee is not automatically unreasonable. A plan may provide personalized advice, extensive employee education, complicated compliance support, or specialized investments. The useful question is whether the cost is reasonable for the services and investment options provided.

Gather the Documents You Need

Before calculating anything, assemble the records that describe your account and the plan’s fee arrangements.

Start with participant documents

Download your latest quarterly statement and, if available, the previous three statements.
Download the plan’s most recent annual participant fee disclosure, sometimes labeled a “404a-5 disclosure,” “participant disclosure,” or “investment and fee disclosure.”
Collect the fact sheet and prospectus for every fund you own.
Save the plan’s full investment menu, including ticker symbols, benchmarks, performance figures, and expense ratios.
Find descriptions and pricing for loans, distributions, managed accounts, brokerage windows, and other optional services.

If the disclosure is missing from the participant portal, request it from human resources or the plan administrator. Also ask for a breakdown showing which costs are paid by the employer and which are deducted from participant accounts.

Review the plan’s Form 5500

Many retirement plans file an annual Form 5500 with the U.S. Department of Labor. You can search filings through the Department of Labor’s Form 5500 search.

A filing may identify service providers, plan assets, participant counts, and certain expenses paid by the plan. Schedule C can contain information about service-provider compensation for plans required to file it. However, Form 5500 data may be historical, aggregated, or difficult to connect directly to your account. Use it as a cross-check rather than as your only source.

How to Find Your 401(k) Expense Ratios

An expense ratio represents a fund’s annual operating expenses as a percentage of its assets. These costs are generally deducted within the investment, so they usually do not appear as a separate withdrawal on your statement.

Match each holding to the correct share class

Write down the full name and ticker symbol of every investment on your statement. The share class matters: two versions of the same strategy can have different expense ratios and revenue-sharing arrangements.

On the fact sheet or prospectus, look for the net expense ratio. This reflects ongoing fund expenses after applicable contractual or voluntary waivers. Also record the gross expense ratio and the expiration date of any waiver. The net cost can increase if a temporary waiver ends.

Fund operating expenses can include:

Investment management fees
Fund administration and accounting expenses
Distribution or 12b-1 fees
Shareholder servicing expenses
Other operating costs

Do not add these components to the published total expense ratio unless the document says they are excluded. They are commonly components of the reported ratio, and adding them again would double-count costs.

Compare like with like

A ratio below 0.50% can be a useful comparison point, but it is not a universal pass-fail standard. An actively managed small-company fund, for example, should not be compared only on price with a broad-market index fund because the two investments have different strategies and risks.

For target-date funds, compare funds with similar target years while examining:

The net expense ratio
The mix of underlying investments
The glide path, including whether it reaches its final allocation “to” or “through” retirement
Risk level and international exposure
Historical performance after fees

Ask whether the plan offers a lower-cost institutional share class, an index alternative, or a collective investment trust. A collective investment trust may have lower operating costs, but it is not a mutual fund and may provide different disclosures, pricing schedules, and portability features.

Find Recordkeeping and Administrative Charges

Search each quarterly statement for terms such as “recordkeeping fee,” “plan fee,” “administrative fee,” “participant fee,” or “account maintenance fee.” These charges may be assessed in several ways:

A flat amount, such as $15 per quarter
A fixed annual per-participant charge
A percentage of account assets
A combination of flat and asset-based pricing
Revenue sharing embedded in certain investment expenses

Recordkeeping generally covers account maintenance, contribution processing, statements, websites, call centers, loans, and distributions. Other administrative costs may cover plan design, compliance testing, tax filings, custody, legal support, independent audit work, and participant communications.

Understand revenue sharing

Some mutual funds pay a portion of their fees to a recordkeeper or another service provider. This arrangement is commonly called revenue sharing. It can offset the employer’s direct recordkeeping bill, but it may also make the fund more expensive than a share class without revenue sharing.

Ask the administrator:

Does any investment generate revenue sharing?
How much revenue is credited to the plan or service provider?
Does it reduce recordkeeping charges?
Are excess amounts returned to affected participants or placed in an expense account?
Could the plan use lower-cost, zero-revenue-sharing share classes instead?

Confirm who ultimately pays each administrative cost: the employer, all participants, participants invested in particular funds, or only people using a specific service.

Audit Hidden and Individual Service Fees

“Hidden” usually means easy to overlook, not necessarily undisclosed. The annual fee notice and service documents may list charges that never appear on your statement unless you use the associated service.

Review the disclosure for:

Loan origination and annual loan-maintenance fees
Distribution and installment-payment charges
Qualified domestic relations order review fees
Account-closeout or termination fees
Brokerage-window setup and trading charges
Paper statement or overnight-delivery fees
Managed-account and advisory fees

Managed-account services deserve particular attention. An advisory fee of, for example, 0.30% is generally charged in addition to the expenses of the underlying funds. Determine whether you are enrolled, what advice you receive, and whether the service provides value beyond the plan’s standard target-date or allocation options.

If the plan offers annuities, stable-value funds, or other insurance-related products, ask about contract charges, insurance expenses, market-value adjustments, surrender restrictions, and transfer limitations. Stable-value products may also have crediting-rate formulas and withdrawal rules that cannot be evaluated through a simple expense ratio alone.

You can also ask whether costs are embedded in proprietary investments, sub-transfer-agent arrangements, or revenue-sharing agreements. Compare the plan’s total cost with the services you actually use rather than assuming every available feature benefits every participant.

Calculate Your Total Annual 401(k) Cost

Create a worksheet with separate lines for recurring and one-time costs. For recurring percentage fees, use your average account balance for the year rather than only the December 31 balance.

If monthly balances are available, add them and divide by 12. Otherwise, a rough estimate can use the average of the beginning and ending balances, although contributions and market movements make that method less precise.

Example calculation

Assume an average balance of $80,000 with the following costs:

Weighted investment expense ratio: 0.35%, or approximately $280
Recordkeeping and administration: 0.25%, or approximately $200
Managed-account service: 0.15%, or approximately $120

The estimated recurring total is 0.75%, or approximately $600 per year before market changes. If the participant also pays a one-time $75 loan fee, report that separately:

Recurring annual cost: $600
One-time service cost: $75
Total deducted during the example year: $675

For multiple investments, calculate a weighted expense ratio. If 70% of the account is in a fund costing 0.10% and 30% is in a fund costing 0.80%, the weighted investment cost is 0.31%:

(70% × 0.10%) + (30% × 0.80%) = 0.31%

When comparing alternatives, consider total cost, diversification, strategy, risk, and performance after fees. The lowest-priced option is not automatically the best fit.

What to Do If Your Fees Look High

Participants usually cannot replace the provider or redesign the plan themselves, but they can request information and suggest improvements.

Request a written explanation. Ask the plan administrator to identify every unclear charge, who receives it, how it is calculated, and whether the employer pays any portion.
Ask about lower-cost investments. Possible alternatives include broad-market index funds, institutional share classes, collective investment trusts, and competitively priced target-date funds.
Question asset-based administration fees. As plan assets grow, an unchanged percentage can produce substantially more revenue even if servicing costs do not rise proportionally.
Ask about employer-paid costs. The employer may be willing to cover some recordkeeping expenses or renegotiate provider pricing.
Use relevant benchmarks. Compare the plan with plans of similar size and complexity. Small plans often lack the purchasing power of very large plans, while plans offering extensive services may reasonably cost more.
Escalate documentation problems. If repeated requests do not produce required participant information, contact the plan’s named fiduciary, benefits committee, or plan administrator.

Recheck fees after a recordkeeper change, an investment-menu update, the addition of a managed-account service, or the release of the annual participant disclosure. An audit is most useful when repeated regularly because fund waivers, share classes, service arrangements, and account usage can change.

What to Do Next

Download your latest statement and annual fee disclosure, then list every investment and direct account charge. Calculate the weighted expense ratio, add recurring administrative and advisory costs, and keep one-time transaction fees separate. If any charge remains unclear, send the administrator a written request for its amount, purpose, recipient, and payment method.

A good 401(k) fee audit produces a dollar estimate, not merely a collection of percentages. Once you know what the plan costs each year, you can make better investment comparisons and give your employer specific, evidence-based suggestions.

This article provides general educational information and is not individualized investment, tax, or legal advice. Plan terms and fee arrangements vary, so review your plan documents and consult an appropriate professional when necessary.