Investment Advisor Regulation: Registration, Fiduciary Duty, and Compliance

Investment advisor regulation in the United States sits on the Investment Advisers Act of 1940, with the Securities and Exchange Commission and the state securities regulators sharing oversight depending on how much money a firm manages. If you give investment advice for pay as a regular part of your business, you fall inside the framework: you register somewhere, you owe your clients a fiduciary duty, and you follow a set of specific rules on marketing, custody, conflicts, and recordkeeping. Ignoring any of it carries real financial consequences.

Who the Rules Apply To

Federal law uses a three-part test. You are an investment advisor if you advise others about securities, you do so as a regular part of your business, and you receive compensation for it. All three must be present. “Securities” covers stocks, bonds, mutual funds, and similar instruments. “Compensation” is read broadly to include asset-based fees, hourly charges, flat fees, or commissions.¹

The statute carves out several groups. Lawyers, accountants, engineers, and teachers are excluded so long as any investment advice is incidental to their main professional work. The moment a CPA starts selling financial planning as a standalone paid service rather than mentioning it during tax work, that exclusion is gone. Broker-dealers are excluded when advice is incidental to brokerage and they take no special compensation for it. Publishers of newspapers and financial publications of general circulation, banks (unless advising a registered investment company), credit rating agencies, and family offices also sit outside the definition.¹

One boundary worth flagging: advisors who work exclusively with qualifying private funds and manage less than $150 million in private fund assets can avoid SEC registration under the private fund adviser exemption created by Dodd-Frank. They still file portions of Form ADV as “exempt reporting advisers” and remain subject to the anti-fraud provisions, so the exemption is from registration, not from the law.²³

SEC or State Registration

The dividing line runs through assets under management. Firms with at least $100 million in AUM generally register with the SEC. Firms below $100 million are prohibited from SEC registration (with limited exceptions) and instead register with the state securities authority where they maintain their principal office.⁴

A buffer zone keeps firms from bouncing between regulators on small AUM swings. Firms with AUM between $100 million and $110 million may register with the SEC but aren’t required to, and a firm already SEC-registered doesn’t have to withdraw until AUM drops below $90 million.⁵

Mid-sized advisors with AUM between $25 million and $100 million are generally state-regulated. The main exception: a mid-sized firm required to register in 15 or more states can elect SEC registration instead.⁴

SEC registration doesn’t eliminate every state obligation. Most states require SEC-registered firms with clients in that state to make a notice filing and pay a fee.

What Registration Actually Involves

Every advisor files through the Investment Adviser Registration Depository (IARD) using Form ADV, whether the destination is the SEC or a state regulator.⁶

Form ADV Part 1

Part 1 is the structured, checkbox portion regulators use to build a profile of the firm. It covers ownership, assets under management, fee arrangements, business affiliations, and disciplinary history. Regulators mine it for risk assessment and to flag firms that warrant closer examination.

Form ADV Part 2: The Brochure

Part 2 is a narrative document written for clients. It must be in plain English and describe the firm’s services, fees, investment strategies, conflicts of interest, and disciplinary history. You deliver it to prospective clients before or at the time of entering into an advisory agreement, and offer existing clients an updated copy annually.

Form CRS

Since 2020, SEC-registered advisors have had to prepare and deliver a Form CRS (Client Relationship Summary) as well. The document runs about four pages and gives retail investors a quick view of the firm’s services, fees, conflicts, and disciplinary record. You deliver it before or at the time you enter into an advisory contract, even an oral one, and post the current version on your website. When a Form CRS becomes materially inaccurate, you have 30 days to update it and then 60 days from that update deadline to communicate the changes to existing clients.⁷

Exam Requirements for Representatives

Individual investment adviser representatives generally must pass the Series 65 exam before licensing. An alternative is the Series 66 combined with a valid Series 7 and the Securities Industry Essentials (SIE) exam. Most states also accept certain professional designations in lieu of the exam, including the CFP, CFA, ChFC, and PFS.⁸

Fiduciary Duty

Registered investment advisors owe clients a fiduciary duty. That means serving the client’s best interest at all times and never subordinating it to the advisor’s own. In its 2019 interpretation, the SEC traced the duty to the anti-fraud provisions of the Advisers Act and applied it to the entire advisory relationship, not just individual recommendations.⁹

Duty of Care

The duty of care has three practical components. 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 doesn’t end at the recommendation. Advisors must provide ongoing monitoring over the life of the relationship.⁹

Duty of Loyalty

The duty of loyalty requires full and fair disclosure of all material conflicts of interest that could affect the advice. Disclosure alone isn’t always enough. If a conflict is severe enough that the advisor cannot serve the client’s best interest despite disclosure, the advisor must eliminate the conflict or stop giving the advice. This is where many advisors slip: they treat a mention in the brochure as the end of the obligation, when the SEC has made clear that disclosure without meaningful management of the conflict falls short.⁹

How It Differs From Reg BI

Broker-dealers follow a different standard, Regulation Best Interest, which requires acting in a retail customer’s best interest at the time of a recommendation. Two differences matter most. The investment advisor fiduciary duty is relationship-wide and ongoing; Reg BI applies at the point of each recommendation. And advisors have an explicit duty to monitor client accounts over time, which Reg BI does not impose.¹⁰

The Core Operational Rules

Anti-Fraud Prohibitions

Section 206 of the Advisers Act makes several categories of conduct illegal for any advisor, registered or not: using any scheme to defraud a client or prospective client; buying from or selling to a client out of the advisor’s own account without written disclosure and client consent; and engaging in any act or course of business that is fraudulent, deceptive, or manipulative as further defined by SEC rules. That last clause is the hook for the custody, compliance, marketing, and pay-to-play rules.¹¹

Custody of Client Assets

Any advisor who holds client funds or securities, or who has authority to access them, falls under the custody rule. Custody is defined broadly. You have it 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 accidentally receiving client funds counts unless you return them within three business days.¹²

Advisors with custody must keep client assets at a qualified custodian, meaning a bank or registered broker-dealer. Client funds must sit in separate 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 to compare against anything the advisor provides. On top of that, an independent public accountant must conduct an annual surprise examination, choosing the timing without advance notice and varying it year to year.¹²

Marketing and Advertising

The SEC’s marketing rule, overhauled in 2020, replaced the old patchwork with a single principles-based framework. The core prohibition is simple: no advertisement may contain a materially misleading statement, whether through outright falsehood, misleading omission, or cherry-picked data that creates a false impression. Any discussion of potential benefits must give fair and balanced treatment to the material risks and limitations. References to past investment advice can’t present only the winners. Performance results can’t rely on cherry-picked time periods designed to flatter returns.¹³

Testimonials and endorsements are now allowed, but with conditions. You must disclose whether the person is a current client, whether compensation was involved, and any material conflicts. You must also have a reasonable basis for believing the testimonial or endorsement complies with the rule at the time of use.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 are entitled to vote for, or up to $150 per election to an official they can’t vote for, without triggering the ban. Anything above those amounts activates the full two-year restriction, which catches people out more than almost any other provision because even a small, well-intentioned contribution can lock the firm out of government advisory business.¹⁴

Ongoing Compliance Obligations

Registration isn’t a one-time event. Every advisor files 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. A late filing is a violation on its own and can bring enforcement action.⁶

Rule 204-2 requires detailed records, including journals, ledgers, client contracts, and all written communications related to the advisory business. Many categories must be kept for at least five years, among them compliance policies, codes of ethics, and access person records. The records must be accurate, current, and 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 must be a supervised person of the advisor, to administer them. The compliance program must be reviewed for adequacy and effectiveness at least annually. Examiners look at whether the annual review is substantive or just a box-check; the latter tends to draw scrutiny.¹⁶

Penalties

The SEC enforces the Advisers Act through administrative proceedings and civil actions in federal court. Available remedies include injunctions, disgorgement of profits from misconduct plus interest, civil monetary penalties, industry bars or suspensions, and censures.¹⁷

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

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

These amounts apply per violation, so a pattern of misconduct stacks up quickly.¹⁸ State regulators have their own enforcement authority over state-registered advisors; powers vary by state but commonly include denying, suspending, or revoking registration, imposing fines, and referring criminal cases 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