401(k) fees are the household leak that never shows up as a line item called “we took this.” They come out of the return. You see a balance. You do not see the skim. The U.S. Department of Labor’s own example is blunt. Start with $25,000, 35 years, a 7 percent average return, and no further contributions. If fees cut that return by 0.5 percent, the account grows to $227,000. If fees cut it by 1.5 percent, it grows to $163,000. A 1 percent difference in fees and expenses reduces the ending balance by 28 percent.
That is not a hot take from a newsletter. That is the Labor Department trying to get workers to open the fee disclosure. Open it.
Where 401(k) fees actually hide
Investment management fees, usually the expense ratio on each fund, are the big one. Plan administration and recordkeeping can be charged to the plan, to participants, or both. Some funds also carry revenue sharing that is not obvious unless you read the annual fee disclosure your plan must send under ERISA rules. You should get plan and investment information at least annually, and a statement of fees actually charged to your account at least quarterly.
The law does not cap the fee at a magic number. It says fees must be reasonable and that fiduciaries have to act in participants’ interest. “Reasonable” is doing a lot of work in that sentence. Your job is to add the layers you can see.
How to read 401(k) fees without becoming an analyst
Find the 404(a)(5) participant fee disclosure. List every fund you hold. Write the expense ratio. Find the recordkeeping or administrative charge, which may be a percent of assets or a flat dollar amount. Add them. A cheap, broad index fund inside a cheap plan is the quiet win. A “target date” fund is fine if the expense ratio is not a luxury tax. A specialty fund with a fat ratio is a story, not a strategy.
- Prefer the lowest-cost index option that matches a U.S. stock, international, and bond mix you can live with.
- Ask HR, in writing, what the plan’s total administrative fee is and whether cheaper share classes exist.
- If you have an old 401(k) from a tiny employer, compare rolling it to an IRA with rock-bottom index funds. Do not roll it to a salesperson’s favorite annuity unless you like paying for the pitch.
- Never leave an employer plan unattended for years without checking the fund list. Plans change. Fees change.
Contribute anyway. Then hunt the 401(k) fees
Fees are not a reason to skip the match. The match is free money. For 2026 the employee elective deferral limit is $24,500, with an $8,000 catch-up if you are 50 or older by year-end, and a higher catch-up in the 60–63 window set by statute. Use the room you can. Then stop donating extra basis points to the recordkeeper.
If your only options are expensive, put in enough to get the match, and invest extra in a low-cost IRA or HSA if you qualify. The 401(k) is a tax wrapper, not a personality. It does not deserve loyalty it did not earn on price.
The slightly contrarian retirement move
Target-date funds are not the enemy. High-cost target-date funds are. If the plan’s default is a 0.7 percent all-in target-date option and there is a 0.03 percent total-market index sitting two rows down, the default is a raise you give the fund company every year you stay asleep. Auto-enrollment is useful. Auto-expensive is not.
Read one quarterly statement all the way through, including the footnotes about fees deducted. If you cannot find a dollar amount or a percentage, that is your question for HR, in email, so there is a paper trail.
Wall Street will talk about beating the market. Your household should talk about not paying 1 percent a year for the privilege of owning the market. The Labor Department already ran the 35-year math. A 28 percent haircut is not a rounding error. It is a delayed Social Security panic with a nicer logo.
Open this year’s fee disclosure. Circle the expensive funds. Move. Then go back to living. 401(k) fees compound in the dark. Turning on the light is a one-hour job with a three-decade payoff.
