Investment Advisor Regulation: Fiduciary Duty and Enforcement

Investment advisor regulation in the United States rests on the Investment Advisers Act of 1940, with oversight divided between the Securities and Exchange Commission and state securities regulators based mainly on how much money a firm manages. Anyone who advises others about securities for compensation as a regular part of their business falls inside this framework and must register, deliver required disclosures to clients, honor a fiduciary duty, protect client assets, follow marketing and political-contribution limits, and keep a working compliance program. Violations carry monetary penalties, industry bars, and disgorgement.

Who Counts as an Investment Advisor

Federal law uses a three-part test. You are an investment advisor if you (1) advise others about securities, (2) do so as a regular part of your business, and (3) receive compensation for it. All three elements must be present. Compensation is read broadly: asset-based fees, hourly charges, flat fees, and commissions all qualify.¹

Several professions are excluded when investment advice is incidental to their main work. Lawyers, accountants, engineers, and teachers fall outside the definition on that basis, as do broker-dealers who receive no special compensation for the advice they give. Publishers of newspapers and financial publications of general circulation, banks (unless advising registered investment companies), credit rating agencies, and family offices are also excluded. The exclusion is fragile: a CPA who begins offering paid financial planning as a standalone service loses it.¹

One narrower carve-out matters for private fund managers. An advisor working exclusively with qualifying private funds and managing less than $150 million in private fund assets can avoid SEC registration under a Dodd-Frank exemption, though the firm still files portions of Form ADV as an exempt reporting adviser and remains subject to the anti-fraud provisions.²³

SEC or State: Where You Register Depends on AUM

The Advisers Act splits jurisdiction along a dollar line. Advisors with at least $100 million in assets under management generally must register with the SEC. Firms below that figure are barred from SEC registration (with limited exceptions) and register instead with the state securities authority where they have their principal office. A buffer zone from $100 million to $110 million lets firms wait to switch, and a firm already SEC-registered doesn’t have to withdraw until AUM drops below $90 million.⁴⁵

Mid-sized advisors with AUM between $25 million and $100 million are generally state-regulated. If a mid-sized firm would have to register in 15 or more states, it can register with the SEC instead.⁴

SEC registration doesn’t erase state involvement. Most states require SEC-registered firms with clients in that state to make a notice filing and pay a fee, with triggers that vary by jurisdiction.

Registration and Required Disclosures

Every advisor files through the Investment Adviser Registration Depository (IARD) using Form ADV.⁶

Part 1 is the structured checkbox portion that captures ownership, AUM, fee arrangements, business affiliations, and disciplinary history. Regulators use it for risk assessment and to identify firms worth examining.

Part 2, known as the brochure, is written for clients in plain English. It describes services, fees, investment strategies, conflicts of interest, and disciplinary history. Advisors must deliver the brochure to prospective clients before or at the time of entering into an advisory agreement, and offer existing clients an updated copy annually.

SEC-registered advisors must also prepare a Form CRS (Client Relationship Summary), running about four pages, that gives retail investors a quick overview of services, fees, conflicts, and disciplinary record. It must be delivered before or at the time of entering into an advisory contract, even an oral one, and posted on the firm’s website. When the Form CRS becomes materially inaccurate, the firm has 30 days to update it and 60 days from that update deadline to communicate the changes to existing clients.⁷

The individuals actually giving advice — investment adviser representatives — typically must pass the Series 65 exam. A combination of Series 66 with a valid Series 7 and the Securities Industry Essentials (SIE) exam is an alternative. Most states accept certain professional designations in lieu of the exam, including CFP, CFA, ChFC, and PFS.⁸

The Fiduciary Duty

Registered investment advisors owe their clients a fiduciary duty and must serve the client’s best interest without subordinating it to their own. The SEC confirmed in a 2019 interpretation that this duty flows from the anti-fraud provisions of the Advisers Act and covers the entire advisory relationship, not just individual recommendations.⁹

The duty of care has three practical parts. Advice must be in the client’s best interest, which requires a reasonable understanding of the client’s financial situation and objectives. When the advisor selects broker-dealers to execute trades, the advisor must seek best execution so the client gets the most favorable total cost or proceeds under the circumstances. And the duty is ongoing: advisors must monitor accounts over the life of the relationship, not just at the moment of recommendation.⁹

The duty of loyalty requires full and fair disclosure of all material conflicts of interest. Disclosure alone isn’t always enough. If a conflict is severe enough that the advisor can’t serve the client’s best interest despite disclosure, the advisor must eliminate the conflict or refrain from providing the advice. Firms that treat a boilerplate brochure disclosure as the end of the analysis have misread the standard.⁹

Broker-dealers operate under a separate standard, Regulation Best Interest, which applies at the point of each recommendation and imposes no ongoing monitoring duty. The advisor fiduciary duty is relationship-wide and continuous, so a client of a broker-dealer does not get the same ongoing oversight an advisory client does.¹⁰

Anti-Fraud Prohibitions Under Section 206

Section 206 of the Advisers Act sets out conduct that is illegal for any advisor, registered or not:

Using any scheme or artifice to defraud a client or prospective client, or engaging in any practice that operates as fraud or deceit.
Buying from or selling to a client out of the advisor’s own account without first disclosing in writing that the advisor is acting as principal and obtaining the client’s consent.
Engaging in any act or course of business that is fraudulent, deceptive, or manipulative, as further defined by SEC rules.

The SEC has built several important rules on the third provision, including the custody rule, the compliance rule, the marketing rule, and the pay-to-play rule.¹¹

Safeguarding Client Assets

Any advisor who holds client funds or securities, or who has authority to access them, must follow the custody rule. Custody is defined broadly. You have custody if you can withdraw money from a client’s account, hold a power of attorney over client funds, deduct advisory fees directly from client accounts, or serve as a general partner or managing member of a fund. Even inadvertently receiving client funds triggers the rule unless you return them within three business days.¹²

Assets must sit with a qualified custodian — a bank or registered broker-dealer — either in accounts under each client’s name or in accounts holding only client assets under the advisor’s name as agent or trustee. The custodian sends account statements directly to clients so they have an independent record. An annual surprise examination by an independent public accountant then verifies that the assets actually exist where the advisor says they do; the accountant chooses the timing without notice, and it must vary from year to year.¹²

Marketing and Advertising

The SEC overhauled the marketing rule in 2020, replacing a patchwork of restrictions with a principles-based framework. No advertisement may include a materially misleading statement, whether through direct falsehood, misleading omission, or cherry-picked data that creates a false impression. Discussions of potential benefits must fairly address the material risks and limitations. References to past recommendations must be balanced rather than a list of winners. Performance results cannot rely on cherry-picked time periods.¹³

The revised rule allows testimonials and endorsements for the first time, but the advisor must disclose whether the person is a current client, whether compensation was involved, and any material conflicts, and must have a reasonable basis for believing the testimonial complies with the rule when used.¹³

Pay-to-Play

The pay-to-play rule bars an advisor from providing advisory services for compensation to a government entity for two years after the advisor or any covered associate makes a political contribution to an official of that entity. A de minimis exception allows covered associates who are natural persons to contribute up to $350 per election to an official they can vote for, or up to $150 per election to one they cannot vote for. Anything above those amounts activates the full two-year ban. Small, well-intentioned contributions have shut firms out of government advisory business.¹⁴

Ongoing Compliance Duties

Registration is the start, not the finish. Every advisor must file an annual updating amendment to Form ADV within 90 days after the end of its fiscal year, reflecting any material changes to the firm’s business, ownership, or AUM. Late filing is a violation on its own.⁶

Rule 204-2 requires advisors to keep detailed records, including journals, ledgers, client contracts, and all written communications related to the advisory business. Many categories must be retained for at least five years, among them compliance policies, codes of ethics, and access person records, all available for regulatory examination.¹⁵

Every SEC-registered advisor must adopt written compliance policies and procedures reasonably designed to prevent violations of the federal securities laws, and must designate a Chief Compliance Officer, who has to be a supervised person of the advisor, to administer them. The program’s adequacy and effectiveness must be reviewed at least annually. Examiners look at whether the review is substantive; firms that treat it as a formality tend to draw closer scrutiny.¹⁶

Enforcement and Penalties

The SEC brings cases through administrative proceedings and civil actions in federal court. Available remedies include injunctions, disgorgement of ill-gotten profits plus interest, civil monetary penalties, industry bars or suspensions, and censures.¹⁷

Civil monetary penalties are adjusted annually for inflation. Under the 2025 adjustment, per-violation maximums for Advisers Act violations are:

Non-fraud violations: up to $11,823 for an individual and up to $118,225 for a firm.
Fraud violations: up to $118,225 for an individual and up to $591,127 for a firm.
Fraud causing substantial losses to clients: up to $236,451 for an individual and up to $1,182,251 for a firm.

Because penalties apply per violation, a pattern of misconduct can stack quickly. In a 2024 settled action, the SEC imposed a $75,000 penalty on a firm for custody rule violations and failure to file its annual Form ADV amendment on time, along with a cease-and-desist order and censure.¹⁸¹⁹

State regulators enforce their own registration regimes with authority that varies by state but commonly includes denying, suspending, or revoking registration, imposing fines, and referring criminal matters to prosecutors.

1
GovInfo. Investment Advisers Act of 1940
2
eCFR. 17 CFR 275.203(m)-1 – Private Fund Adviser Exemption
3
eCFR. 17 CFR 275.204-4 – Reporting by Exempt Reporting Advisers
4
Office of the Law Revision Counsel. 15 USC 80b-3a – State and Federal Responsibilities
5
eCFR. 17 CFR 275.203A-1 – Eligibility for SEC Registration; Switching to or from SEC Registration
6
U.S. Securities and Exchange Commission. Electronic Filing for Investment Advisers on IARD
7
Federal Register. Form CRS Relationship Summary; Amendments to Form ADV
8
NASAA. Exam FAQs
9
U.S. Securities and Exchange Commission. Commission Interpretation Regarding Standard of Conduct for Investment Advisers
10
U.S. Securities and Exchange Commission. Regulation Best Interest and the Investment Adviser Fiduciary Duty
11
Office of the Law Revision Counsel. 15 USC 80b-6 – Prohibited Transactions by Investment Advisers
12
eCFR. 17 CFR 275.206(4)-2 – Custody of Funds or Securities of Clients by Investment Advisers
13
eCFR. 17 CFR 275.206(4)-1 – Investment Adviser Marketing
14
eCFR. 17 CFR 275.206(4)-5 – Political Contributions by Certain Investment Advisers
15
eCFR. 17 CFR 275.204-2 – Books and Records to Be Maintained by Investment Advisers
16
eCFR. 17 CFR 275.206(4)-7 – Compliance Procedures and Practices
17
U.S. Securities and Exchange Commission. Division of Enforcement Manual
18
U.S. Securities and Exchange Commission. Adjustments to Civil Monetary Penalty Amounts
19
Securities and Exchange Commission. SEC Charges Investment Adviser for Custody Rule and Form ADV Violations