Is Vanguard a Fiduciary? Advisors, 401(k)s, and SEC Action

Vanguard is a fiduciary when you use its advisory services, and it is not a fiduciary when you place your own trades through its self-directed brokerage. Vanguard Advisers, Inc. is registered with the SEC as an investment adviser and owes a fiduciary duty of care and loyalty to its advisory clients.¹ Vanguard’s broker-dealer arm operates under a lower standard, Regulation Best Interest, that only applies at the moment a recommendation is made. So the honest answer to “is Vanguard a fiduciary” is: it depends on which door you walk through.

When Vanguard Acts as a Fiduciary

Vanguard’s advisory programs, including Vanguard Personal Advisor and Vanguard Digital Advisor, are delivered through Vanguard Advisers, Inc. (VAI).² Because VAI is a registered investment adviser, it falls under the Investment Advisers Act of 1940, which imposes a fiduciary obligation on any firm providing investment advice for compensation.³ That obligation runs throughout the relationship, not just at the point of sale.⁴

Duty of Care

The duty of care means the advisor has to understand the risks, costs, and potential rewards of a recommendation and match them to your financial situation, goals, and risk tolerance. Placing someone who needs stable income next year into a volatile growth fund would likely fall short of that duty.³

Duty of Loyalty

The duty of loyalty requires the advisor to eliminate conflicts of interest or disclose them fully enough that you can weigh them yourself. An advisor cannot steer you into a product because it pays the firm more.³ The duty does not require the cheapest option in every case; a costlier product can be recommended if other factors make it genuinely better for you.⁴

When Vanguard Is Not a Fiduciary

Trading on your own through Vanguard’s brokerage platform is a different legal relationship. The broker-dealer is governed by Regulation Best Interest (Reg BI), an SEC rule adopted in 2019. Reg BI requires the firm to act in your best interest at the time it makes a recommendation, and it imposes obligations around disclosure of fees and conflicts, reasonable diligence on the investment, conflict-management policies, and internal compliance procedures.⁵

The gap between Reg BI and the fiduciary standard matters in two practical ways. First, Reg BI attaches to recommendations. If you pick your own investments without one, the firm’s core job is simply to execute your trades fairly. Second, there is no ongoing monitoring obligation after a recommendation is made.⁶ A fiduciary advisor owes you a continuous duty; a broker does not. If you run your own portfolio at Vanguard Brokerage, you own the decisions and the outcomes.

Fiduciary Status in 401(k)s and Other Retirement Plans

Employer-sponsored retirement plans are governed by the Employee Retirement Income Security Act (ERISA), which imposes fiduciary standards separate from those in the Advisers Act. When Vanguard serves as a trustee or investment manager for a plan, it takes on an ERISA fiduciary role. ERISA fiduciaries must manage plan assets solely for the benefit of participants and their beneficiaries, using the care and skill a prudent person familiar with such matters would apply.⁷

ERISA recognizes different levels of that responsibility. Vanguard Advisers acts as a “3(38) fiduciary” for its Personal Advisor, Digital Advisor, and Managed Account Program services, taking on full discretionary authority over investment decisions in enrolled accounts. For its Situational Advisor program, Vanguard acts as a “3(21) fiduciary,” giving nondiscretionary advice while the plan sponsor keeps the final call.⁸ Under a 3(38) arrangement, investment-selection liability shifts to Vanguard. Under a 3(21) arrangement, the plan sponsor still shares it.

What Vanguard’s Ownership Structure Does and Doesn’t Solve

Vanguard’s corporate setup is unusual. The company is owned by its member funds, and those funds are owned by their shareholders, meaning fund investors ultimately own the firm.⁹ There are no outside shareholders demanding profits at fund investors’ expense, which removes one conflict common at publicly traded financial firms.

It does not remove every conflict. Vanguard Advisers typically recommends Vanguard-branded funds. Its programs use an open architecture that can include non-Vanguard ETFs and funds when they are the lowest-cost option meeting a target allocation, but the default preference is for Vanguard products. To blunt the incentive, Vanguard reduces its advisory fee by the revenue it earns from the recommended funds, so it does not net more based on which fund goes into your portfolio.⁸

The 2025 SEC Enforcement Action

In August 2025, the SEC charged Vanguard Advisers with failing to adequately disclose conflicts of interest in its Personal Advisor Services program. From 2020 through 2023, Vanguard used a compensation system that gave advisors bonuses and salary increases for enrolling and retaining clients in the advisory program, which created an incentive to recommend the advisory service over a brokerage account. The SEC’s issue was not the incentive itself but the contradictory disclosures: Vanguard’s Form ADV brochure acknowledged the bonus structure, while its Form CRS and advisor supplements said advisors received no additional compensation based on recommendations. Vanguard agreed to pay a $19.5 million civil penalty without admitting or denying the findings.¹⁰

The takeaway is that a fiduciary label is not a guarantee of conflict-free advice. It is a legal requirement that conflicts be surfaced clearly enough for you to judge them.

How to Verify Whether an Advisor Owes You a Fiduciary Duty

You do not need to rely on marketing language. Two free tools let you check the standard that applies to a specific person or firm.

The SEC’s Investment Adviser Public Disclosure (IAPD) database lets you search any registered investment adviser firm or individual representative and pull up the current Form ADV, registration status, employment history, and any disciplinary events. The SEC’s investor assistance line is (800) 732-0330.¹¹
FINRA BrokerCheck shows whether a person or firm is registered to sell securities, give investment advice, or both. It is especially useful for spotting dual-registered professionals who move between fiduciary and non-fiduciary roles depending on the service.¹²

Before you sign up for anything, ask whether the professional is acting as an investment adviser (fiduciary) or a broker-dealer (Reg BI) for the specific service you are about to use. The same person can hold both roles at different times.

If You Think Vanguard Breached Its Duty

Your options depend on which relationship you were in. Complaints about a registered investment adviser can be submitted through the SEC’s Tips, Complaints, and Referrals (TCR) portal. You can file, get a confirmation number, and track the submission. Anonymous whistleblower tips must be filed through an attorney.¹³

Disputes with a broker-dealer typically go to FINRA arbitration. You file a Statement of Claim laying out the facts, the parties, and the damages you want. Claims of $50,000 or less are usually decided by a single arbitrator on the documents alone; larger claims go before a panel. Filing fees scale with the amount at stake, and you can request a fee waiver by showing financial hardship.¹⁴

For retirement plans, ERISA remedies are stronger. A fiduciary who breaches its duties is personally liable for any resulting losses to the plan, must return any profits made through misuse of plan assets, and can be removed from the role by a court.¹⁵ The Department of Labor enforces these provisions and can bring action on behalf of plan participants.

1
Investment Adviser Public Disclosure. Vanguard Advisers, Inc. Summary
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Vanguard. Advisory Service Disclosure
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Federal Register. Commission Interpretation Regarding Standard of Conduct for Investment Advisers
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U.S. Securities and Exchange Commission. Regulation Best Interest and the Investment Adviser Fiduciary Duty
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eCFR. 17 CFR 240.15l-1 – Regulation Best Interest
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U.S. Securities and Exchange Commission. Frequently Asked Questions on Regulation Best Interest
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Office of the Law Revision Counsel. 29 USC 1104 – Fiduciary Duties
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Vanguard Institutional Investor Group. Meeting Your Fiduciary Responsibilities With Vanguard Advice Services
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Vanguard. Ownership – Vanguard
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U.S. Securities and Exchange Commission. SEC Charges Vanguard Advisers for Failing to Adequately Disclose Conflicts
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Investor.gov. Investment Adviser Public Disclosure (IAPD)
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Financial Industry Regulatory Authority. BrokerCheck – Find a Broker, Investment or Financial Advisor
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U.S. Securities and Exchange Commission. Welcome to Tips, Complaints, and Referrals
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FINRA.org. Arbitration Claim Filing Guide
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Office of the Law Revision Counsel. 29 USC 1109 – Liability for Breach of Fiduciary Duty