How to Find and Calculate Your 401(k) Fees: Steps and Benchmarks

To calculate your 401(k) fees, multiply each fund’s expense ratio by your balance in that fund, add any flat administrative and service charges, and divide the total by your overall account balance. The result is your all-in annual cost as a percentage. A one percentage point difference in fees can shrink your ending balance by 28 percent over a 35-year career, so the arithmetic is worth doing carefully.¹

Gather the Two Disclosures First

Federal rules require your plan administrator to give you the numbers you need in two documents. The annual participant fee disclosure lists every investment option side by side with each fund’s expense ratio, any administrative fees deducted from individual accounts, and individual service charges such as loan processing. Your plan must deliver it before you first direct your investments and at least once every 14 months after.²

Your quarterly account statement is the second piece. It must show the actual dollar amounts deducted from your account during the prior three months, broken out by administrative charges and individual service fees.³ Both documents usually sit in your plan’s online portal under “disclosures” or “documents.” If you can’t find them, HR is required to provide copies.

Before starting the math, pull together three things:

The comparative chart from your annual disclosure, which gives you every fund’s expense ratio.
Your quarterly statements for the past year, which show the actual dollar deductions.
A current account summary that breaks down how much you hold in each fund.

That balance breakdown matters. The same expense ratio produces very different dollar costs depending on where your money actually sits.

Step 1: Calculate Your Investment Fees Fund by Fund

Investment management fees are the largest component of what you pay, and they come out of your returns before you ever see them.¹ Each expense ratio is an annual percentage, so the dollar cost is straightforward: divide the ratio by 100 to get a decimal, then multiply by your balance in that fund.

Say you have $60,000 in a stock index fund with a 0.04 percent expense ratio and $40,000 in an actively managed bond fund charging 0.55 percent. The index fund costs $60,000 × 0.0004 = $24 per year. The bond fund costs $40,000 × 0.0055 = $220. Total investment fees: $244 on a $100,000 portfolio.

Run the same calculation for every fund you hold, even small positions. A few notes:

Use the expense ratio as printed. It’s already net of any fee waivers.
Your balance moves during the year. Averaging your beginning and ending quarterly balances gives a more accurate annual figure than a single snapshot.
Stable value funds and company stock may follow different fee structures than mutual funds. Look for a footnote on the comparative chart.

Step 2: Add Flat Administrative and Service Fees

The second category is flat dollar charges that come out of your account regardless of balance. They fall into two buckets: plan-wide administrative fees every participant pays, and individual service fees triggered only by specific actions.

Administrative fees cover recordkeeping, legal, accounting, and trustee services.¹ Check your quarterly statement for a line labeled something like “administrative fee” or “recordkeeping charge.” Fifteen dollars per quarter works out to $60 for the year. Some plans instead charge this as a percentage of assets. If yours does, treat it as part of your expense ratio calculation rather than a flat fee.

Individual service fees apply only when you use certain plan features. Common examples from the annual disclosure include a loan origination fee (often $50 to $150), a hardship withdrawal processing fee (roughly $25 to $100), and a fee for processing a domestic relations order when the plan divides assets in a divorce.

Add up every flat charge from your quarterly statements for the year. If you didn’t request any individual services, this figure is just your administrative fees. If you took a loan or requested another action, include those one-time charges too.

Step 3: Combine Into a Dollar Total and a Percentage

Take the total dollar amount from your expense ratio calculations and add the total flat charges. That sum is your all-in annual cost in dollars. Using the numbers above, $244 in investment fees plus $60 in administrative charges is $304 for the year.

To turn that into a percentage you can compare against benchmarks, divide the total by your average account balance for the year and multiply by 100. Here: $304 ÷ $100,000 × 100 = 0.304 percent.

The two formulas in plain form:

Total dollar cost = (each fund’s expense ratio × that fund’s balance, summed across all funds) + all flat administrative and service fees.
Total fee percentage = total dollar cost ÷ average account balance × 100.

The percentage is the more useful number. It captures investment management, administration, and one-time service charges in a single figure you can stack against other plans or industry averages.

How Your Number Compares

The asset-weighted average expense ratio for equity mutual funds fell to 0.40 percent in 2024, and bond mutual fund averages sat at 0.38 percent. Those are general mutual fund figures rather than 401(k)-specific ones, but they give useful context. About 74 percent of 401(k) participants are in plans where average fund costs fall below 1.00 percent, and large-employer plans often cluster around 0.27 percent or lower because those employers can negotiate institutional share classes.

If your all-in percentage lands above 1.0 percent, look at which funds or charges are driving it up. A single actively managed fund with a 1.2 percent expense ratio can pull an otherwise cheap portfolio’s blended cost above the benchmark. Swapping one expensive fund for a lower-cost index option in the same asset category, when your plan offers one, is often the fastest way to cut your total fee in half.

Why a Small Fee Difference Matters

The Department of Labor’s own example makes the compounding effect concrete. Start with a $25,000 balance, assume 7 percent average annual returns for 35 years, and make no further contributions. At 0.5 percent in total fees, the balance grows to $227,000. At 1.5 percent, it grows to $163,000. That one percentage point difference costs $64,000, a 28 percent reduction, and the gap widens if you keep contributing along the way.¹

Fees are deducted before your returns compound. Every dollar paid in fees never earns returns in future years, and those lost returns never earn returns of their own. Over short periods, the drag is barely visible. Over a full career, fees are the single largest controllable variable in your retirement outcome.

What to Do If Your Fees Look Too High

Your employer has a legal role here. Under ERISA, plan fiduciaries must select and monitor service providers prudently and solely in the interest of participants.² That includes periodically reviewing the plan’s fee structure against what other providers charge for similar services.⁴

If your math says the costs are unreasonable, raise the issue in writing with your HR department or plan committee. Bring your all-in percentage and the benchmarks you compared it against. Most employers aren’t trying to overcharge employees; they may simply not have renegotiated their provider contract in years. A written request backed by specific numbers is harder to ignore.

If that goes nowhere, contact the Department of Labor’s Employee Benefits Security Administration. EBSA benefits advisors help participants understand their rights and can investigate potential fiduciary violations. Reach them at 1-866-444-3272 or through the online inquiry form on the DOL website.⁵

1
U.S. Department of Labor. A Look at 401(k) Plan Fees
2
eCFR. 29 CFR 2550.404a-5 – Fiduciary Requirements for Disclosure in Participant-Directed Individual Account Plans
3
U.S. Department of Labor Employee Benefits Security Administration. Final Rule to Improve Transparency of Fees and Expenses to Workers in 401(k)-Type Retirement Plans
4
U.S. Department of Labor. ERISA Fiduciary Advisor
5
U.S. Department of Labor. Ask EBSA