With an American Funds 401(k), one firm both runs the plan and manages many of the funds in it. That overlap is the conflict of interest. The firm can earn money when its own funds stay on the list. The menu it builds may serve its profit as much as your staff.
What the American Funds 401(k) Conflict of Interest Really Means
If your company plan runs on the American Funds platform, you are working with one of the largest active managers in the country. The American Funds 401(k) conflict of interest is structural, not personal. The same parent firm that keeps the books on your plan also builds and runs many of the investments your employees hold. When one company sits on both sides of that relationship, its own funds carry a quiet home-field advantage on the menu.
None of this is hidden in a legal sense. It is disclosed. The problem is that disclosure and understanding are not the same thing, and the duty to understand it sits with you as the plan sponsor, not with the provider.
How the Platform Makes Money from Your Plan
A bundled provider earns money in more than one place. There is the stated recordkeeping fee, which is easy to see. Then there is the money that flows out of the funds themselves, which is harder to see and often larger over time.
Two mechanisms do most of the work. The first is the 12b-1 fee, a distribution charge baked into a fund’s expense ratio. The second is a sub-transfer agency payment, often shortened to sub-TA, which the fund pays the recordkeeper for tracking participant accounts. Both are forms of revenue sharing, and both come out of fund assets rather than a separate invoice you can question line by line.
American Funds offers several retirement share classes, commonly labeled R-1 through R-6. The lower-numbered classes carry more revenue sharing and cost participants more each year. The R-6 class strips revenue sharing out entirely. Two plans holding the very same fund can pay very different amounts depending on which share class the plan was placed in.
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Why Proprietary Funds Create a Hidden Incentive
Here is where the structure starts to matter. Because revenue sharing flows from the fund to the affiliated provider, keeping in-house funds on the lineup is not a neutral choice. Every dollar that stays invested in a proprietary fund can produce fund-level revenue for the same corporate family that administers the plan.
That does not make the funds bad. It does mean the menu may be built around what is comfortable and profitable for the provider rather than what is sharpest for your workforce. A truly independent review would ask whether a lower-cost share class, an index option, or an outside fund belongs in a given seat. A provider reviewing its own shelf has little reason to ask that question.
Where This Lands on You as a Plan Fiduciary
Under federal retirement law, the plan sponsor is a fiduciary. ERISA requires you to act prudently, to pay only reasonable fees, and to monitor the plan’s investments and costs on an ongoing basis. The Department of Labor reinforces this through the 408(b)(2) fee disclosure rule, which requires covered providers to report both direct and indirect compensation, including revenue sharing. This duty runs across all of your workplace retirement plans, not just the investment menu.
Receiving that disclosure is not the end of your duty. You are expected to read it, understand the indirect compensation, and benchmark it against the open market. When a plan leans heavily on an affiliated fund family, regulators and plaintiffs’ attorneys look closely at whether the sponsor questioned the arrangement or simply accepted it. Proprietary fund lineups have been a recurring theme in retirement plan litigation for years.
Is American Funds a Bad Choice for Your 401(k)?
No. American Funds has a long, competitive record in active management, and its expense ratios are often reasonable for that style. The concern is not the funds themselves. It is whether you have independently confirmed that the lineup, the share class, and the all-in fees are right for your people.
How to Review the Conflict Without Losing a Good Plan
You do not have to rip out the platform to take the conflict seriously. The goal is a documented, arm’s-length review you can defend later. That starts with confirming your share class, comparing your all-in cost against benchmark data, and asking whether revenue sharing is credited back to participants or quietly retained.
Many sponsors bring in an independent fiduciary as broker of record to run that review and to keep running it. An outside advisor can benchmark the lineup as part of how you maximize a 401(k) plan and weigh outside funds against the in-house options. The work is documented with the same investment risk management discipline a prudent review expects. For high-balance employees who want professional management without forcing a 401(k) rollover out of the plan, a self-directed brokerage window is a plan design option the sponsor elects to offer. It opens access to a wider set of investments while assets stay inside the plan.
The point is not to assume bad faith. It is to make sure the parties sitting on both sides of your plan are not the only ones deciding what is reasonable. That independent check is the heart of the fiduciary duty, and it is what protects your employees and you. It reflects the same discipline behind Preserve. Strengthen. Grow.â„¢
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Frequently Asked Questions
Is American Funds a Fiduciary on My 401(k)?
Usually not in the way sponsors assume. A bundled fund provider and recordkeeper generally acts in a sales and service role, not as a hired fiduciary watching your interests. The plan sponsor keeps the fiduciary duty to select and monitor investments, so the responsibility to question the lineup stays with you.
What Is Revenue Sharing in a 401(k)?
Revenue sharing is money that flows out of fund assets to pay the recordkeeper or distributor. It includes 12b-1 fees and sub-TA payments. Because it is embedded in the expense ratio rather than billed separately, it can be easy to miss when you review your plan’s true all-in cost.
What Are 12b-1 and Sub-TA Fees?
A 12b-1 fee is a distribution and marketing charge built into a fund’s expense ratio. A sub-TA fee pays the recordkeeper for tracking individual participant accounts. Both are paid from fund assets, which means participants fund them indirectly through lower net returns rather than through a visible invoice.
Can I Remove American Funds from My Plan Menu?
Yes. As the sponsor, you control the investment lineup and can add, replace, or remove funds through a documented review. Many plans keep strong American Funds options while moving to the lower-cost R-6 share class or adding outside and index choices to round out the menu.
Does Revenue Sharing Make a 401(k) More Expensive?
It can, when it is not credited back to the plan. If revenue sharing offsets recordkeeping costs and the credit is passed to participants, the net effect may be fair. The risk is paying for the same service twice, once visibly and once inside the funds.
What Share Class Should My Plan Use?
That depends on plan size and how recordkeeping is paid, so there is no single answer. Many fiduciaries benchmark the R-6 class, which removes revenue sharing, against revenue-sharing classes to see which produces the lowest reasonable all-in cost once recordkeeping is paid directly. Document the comparison either way.
How Do I Document a Prudent Fund Review?
Keep a written record of what you compared, when, and why. That includes fee benchmarking, share class analysis, and the reasoning behind keeping or changing each fund. A consistent, dated process is what regulators and courts look for, and it is far easier to maintain with an independent advisor involved. Our 401(k) Plan Fees & Conflicts guide covers related considerations in more depth.
