Asking who our 401(k) provider is usually produces one name and four jobs. Recordkeeping, administration, custody and advice are separate functions that can be bundled, and an employer who does not know which functions its one name is performing cannot tell whether it is well served or well marketed. This page separates the four, says how each is paid, and gives the single fee question that does more work than any other. It ranks nobody: the useful output here is knowing what to ask.
Recordkeeper: whose money is whose
The recordkeeper tracks each participant's balance, investments, contributions and distributions. It is the system of record for the plan's accounting and the thing participants log into. Recordkeeping is frequently priced per participant per year, and frequently paid partly out of the investments themselves, which is the arrangement that makes plan fees hard to see.
Third party administrator: does the plan obey its own document
The administrator handles compliance testing, the plan document, the filings and the eligibility and distribution mechanics. On a bundled arrangement the recordkeeper does this too; on an unbundled one it is a separate firm with a separate fee, usually a base charge plus a per-participant amount. Unbundled costs more visibly and sometimes less in total, which is the whole argument for it.
Custodian and adviser: holding the assets, and choosing them
The custodian or trustee holds the plan's assets, which is a function nobody thinks about until it matters. The adviser helps select and monitor the investment line-up and, depending on the engagement, may take on part of the responsibility for those decisions in writing. Whether they do, and in what words, is worth more attention than their performance commentary.
The one fee question
Ask for total plan cost as a percentage of plan assets, broken into what participants pay through the investments and what the employer pays directly. That single framing exposes revenue sharing, which is where the cost of a plan usually hides, and it makes two proposals comparable in a way that a list of per-participant charges never does. An employer who cannot answer that about its own plan does not yet know what the plan costs.
Questions people ask about 401k providers
Is one provider cheaper than four?
Bundled is usually simpler and often cheaper for small plans. It is also less visible, because the components are not separately priced. Get total cost as a percentage of assets either way, and the comparison becomes possible.
Who actually pays the fees?
Some are charged to the employer and some to participants through the investments. That split is the most important thing to establish and the least often volunteered, which is why asking for it as a percentage of plan assets is the question worth memorising.
Do you rank 401(k) providers?
No. A ranking of providers would require reading and comparing arrangements we have not read, and this site publishes no vendor ranking. What it gives you is the four functions and the fee framing to evaluate any proposal yourself.
Does the provider carry our responsibility as sponsor?
Only to the extent it says so in writing, and rarely all of it. Selecting and monitoring providers is itself a sponsor duty. The Department of Labor's own publication on the subject is the thing to read before signing.