A 401(k) investment policy statement is a written document that spells out how your plan’s investment menu will be chosen, monitored, and changed. ERISA doesn’t require one by name, but the Department of Labor has described adopting one as consistent with the fiduciary obligations set forth in ERISA, and courts routinely look for one when deciding whether a plan fiduciary acted prudently. For a plan sponsor or committee member, it’s the single most useful piece of evidence that a disciplined process sits behind every fund on the lineup.
Is an IPS Legally Required
The phrase “investment policy statement” appears nowhere in ERISA. What the statute does require is that every employee benefit plan be established and maintained under a written instrument naming one or more fiduciaries with authority to manage the plan’s operation.1GovInfo. 29 USC 1102 – Named Fiduciaries That written instrument is the plan document itself, not the IPS. The IPS is separate and voluntary.
Voluntary doesn’t mean optional in practice. The IRS instructs plan fiduciaries to “document your decision-making process to demonstrate the rationale behind the decision at the time it was made,”2Internal Revenue Service. Retirement Plan Fiduciary Responsibilities and an IPS is the most straightforward way to do that. Skip one and you aren’t violating any specific statutory provision, but you’re making it much harder to defend committee decisions if a participant ever files suit.
The document also has to reflect the core fiduciary duties ERISA imposes: acting solely in the interest of participants, with the care a knowledgeable person in the same role would use, and diversifying investments to minimize the risk of large losses.3Office of the Law Revision Counsel. 29 USC 1104 – Fiduciary Duties Every meaningful provision in a functional IPS traces back to one of those duties.
What the IPS Should Cover
There’s no required format, but working IPS documents share a recognizable set of provisions. Think of the document as answering four questions: what is the plan trying to accomplish, what will it offer, how will you know if it’s working, and what will you do when it isn’t.
Objectives and Asset Classes
Start with the plan’s investment objectives, which for most 401(k) plans means providing participants with a diversified range of options across different risk levels. Identify the broad asset classes the plan will offer. A typical lineup covers domestic equities, international equities, fixed income, and a cash-equivalent or stable value option. Assign each category a benchmark index for comparison, such as a broad large-cap index for domestic stock funds or an aggregate bond index for fixed income.
A plan offering only large-cap U.S. stock funds hasn’t met ERISA’s diversification standard, no matter how well those funds perform.3Office of the Law Revision Counsel. 29 USC 1104 – Fiduciary Duties The IPS should say why each asset class was included.
Fund Selection Criteria
Beyond asset class, the IPS establishes screening criteria for individual funds. Common standards include a minimum track record of several years, an expense ratio that compares favorably to the fund’s peer group, and consistent risk-adjusted performance relative to the assigned benchmark. No specific statute mandates these criteria, so they vary from plan to plan. The point is to set them in advance so fund selection relies on objective standards rather than whoever pitched the committee most recently.
Monitoring and Watch List Triggers
Define how often the committee reviews fund performance. Quarterly reviews are typical. Define what happens when a fund falls short. Most IPS documents include a watch list mechanism: if a fund lags its benchmark for a defined stretch, commonly four to six consecutive quarters, it gets flagged for heightened scrutiny. Other triggers might include a change in fund management, meaningful style drift (a value fund that starts behaving like a growth fund), or a significant increase in the fund’s expense ratio.
Placement on a watch list shouldn’t automatically mean replacement. Describe the evaluation the committee will conduct, the factors it will weigh, and the documentation it will produce when deciding to retain or replace a flagged fund. This is where the fiduciary process lives. Courts care less about whether you kept a struggling fund and more about whether you had a rational, documented reason for doing so.
The Default Investment
When an employee gets auto-enrolled but never makes an investment election, their money has to go somewhere. The IPS should specify the plan’s Qualified Default Investment Alternative, which earns a separate layer of fiduciary protection under federal regulations.4Federal Register. Default Investment Alternatives Under Participant Directed Individual Account Plans
The regulations describe several qualifying options, but the landscape is dominated by a single product. Target-date funds fill the QDIA role in roughly 98% of plans. A target-date fund automatically adjusts its mix of stocks and bonds based on the participant’s expected retirement year, growing more conservative as the date approaches. Other qualifying options include balanced funds that maintain a static allocation and professionally managed accounts.
Name the specific QDIA in the IPS, explain why it was selected, and describe the criteria for evaluating its performance. The plan must also provide participants with advance notice describing the default investment, the right to redirect their money, and the right to opt out of contributions entirely. Documenting the QDIA selection and notice process ties the default investment to the same fiduciary framework that governs the rest of the lineup.
Fee Monitoring and Revenue Sharing
Fee claims now dominate ERISA litigation, and this is where the IPS pays for itself most directly. The plan’s service providers all charge fees, and fiduciaries have a legal obligation to ensure those fees are reasonable for the services provided.
Federal regulations require covered service providers to disclose their direct and indirect compensation to plan fiduciaries before entering into a contract, including descriptions of recordkeeping fees, investment management fees, and any compensation flowing between related parties.5eCFR. 29 CFR 2550.408b-2 – General Statutory Exemption for Services Those disclosures only help if the committee uses them. The IPS should establish a process for reviewing them, comparing them to market rates, and periodically soliciting competitive bids. A request for proposals every few years is widely considered a best practice for demonstrating that recordkeeping fees are reasonable.
Many mutual funds pay a portion of their expense ratios back to the plan’s recordkeeper as indirect compensation, a practice known as revenue sharing. Because the payments are buried inside fund expense ratios, they’re less transparent than direct fees, and they can leave participants holding certain funds subsidizing administrative costs that benefit everyone. The IPS should describe how the committee monitors revenue sharing, whether excess revenue sharing is credited back to participant accounts, and how the committee ensures that indirect compensation doesn’t inflate the plan’s total cost beyond what a direct-fee arrangement would cost.
The Advisor’s Role: 3(21) or 3(38)
Most plan sponsors hire an outside investment advisor, and the IPS should clearly state what type of fiduciary role that advisor fills. The distinction matters because it decides who makes the final call on investment changes.
An advisor acting as an ERISA Section 3(21) fiduciary provides recommendations and monitors the lineup, but the plan’s investment committee keeps final decision-making authority. The committee votes on whether to accept or reject each recommendation, and the IPS documents the criteria the committee uses to evaluate those recommendations. A Section 3(38) investment manager has discretionary authority to add, remove, or replace funds without committee approval. The committee still carries the fiduciary obligation to hire, monitor, and if necessary replace the 3(38) manager. Delegation is not abdication.
Identify which role the advisor occupies, describe the scope of the advisor’s authority, and lay out the committee’s process for reviewing the advisor’s performance at least annually. For a 3(38) arrangement, the IPS should also specify the criteria the advisor must follow when making changes, since those criteria replace the committee’s direct decision-making as the controlling framework.
Documenting Participant Direction Under 404(c)
Most 401(k) plans let participants pick their own investments from the plan’s menu. ERISA Section 404(c) gives a powerful incentive to structure the plan this way: when a participant exercises control over the assets in their own account, no fiduciary is liable for losses that result from that participant’s choices.3Office of the Law Revision Counsel. 29 USC 1104 – Fiduciary Duties
The safe harbor only applies when the plan genuinely gives participants control. To qualify, the plan must offer at least three diversified investment alternatives with materially different risk and return characteristics. In the aggregate, those options must allow a participant to build a portfolio anywhere along the risk spectrum normally appropriate for a plan participant.6eCFR. 29 CFR 2550.404c-1 – ERISA Section 404(c) Plans The IPS should document how the plan’s lineup satisfies these requirements. Fiduciaries remain responsible for prudently selecting and monitoring the menu itself. Section 404(c) shields you from the participant’s decision about which items on the menu to pick, not from your decision about what items belong on the menu.
Adopting and Reviewing the Document
Once drafted, the IPS goes to the plan’s investment committee or board for formal adoption. Best practice is a recorded vote with the results noted in the meeting minutes. ERISA doesn’t prescribe an adoption procedure, but clear documentation eliminates any ambiguity about when the policy took effect and who approved it. Committee members and other authorized fiduciaries typically sign the document, and a copy gets filed with the permanent plan records alongside the plan document and summary plan description.
Review the IPS at least annually. Ask whether the policy’s investment criteria, asset class structure, and fee benchmarks still reflect the plan’s needs and participant demographics. If the workforce has aged significantly, or the plan has grown large enough to access institutional share classes, update the document. Every review session should produce meeting minutes recording what the committee discussed, what changes were made or declined, and why. Those minutes are the record courts will examine if the committee’s prudence is ever challenged.
Why a Poorly Followed IPS Is Worse Than None
An IPS that sits in a drawer creates more risk than no IPS at all. Decisions that deviate from the policy’s stated criteria can be treated as evidence of a fiduciary breach, even if the decision itself was reasonable. If the IPS says underperforming funds go on a watch list after four consecutive quarters of lagging their benchmark, and the committee ignores a fund that has lagged for eight quarters without documenting any review, a plaintiff’s attorney has an easy argument that the committee violated its own process.
That isn’t a reason to avoid writing one. It’s a reason to write one you’ll actually follow. Keep the language flexible enough to accommodate judgment calls. Use words like “generally” and “may” for procedural steps that warrant discretion, and reserve mandatory language for steps the committee is genuinely committed to taking every time. A good IPS reflects how the committee actually operates, not an idealized process no one has time to execute.