Broker-Dealer vs. Investment Adviser in Missouri: What Investors Should Know
A plain-English guide to how broker-dealers and investment advisers differ, when each standard of conduct applies, what dual registration means, and how Missouri investors can check a financial professional before handing over money. Educational, not legal advice.
Educational guide · Last reviewed August 9, 2026
By Dontay Phillips, Founder & Principal Attorney, ClearScope Counsel
The person helping with your investments may use a title such as financial advisor, wealth manager, or financial consultant. Those titles alone do not tell you which legal rules apply. The more useful questions are:
- What service is the person providing?
- Is the person acting through a brokerage account, an advisory account, or both?
- How are the person and the firm being paid?
- What has the person agreed to monitor?
Those details help determine whether the professional is acting as a broker, an investment adviser, or both — and what standard applies to the service or recommendation at issue.
A brokerage relationship is generally built around securities transactions. An advisory relationship is generally built around compensated investment advice. Neither model is automatically better for every investor. The right fit depends on the services you need, the way you prefer to pay, and the scope of responsibility the professional accepts in writing.
The basic roles
Broker-dealer
A broker effects securities transactions for other people. A dealer buys and sells securities for its own account as part of a regular business. Many firms perform both functions, which is why the combined term broker-dealer is common.
In a transaction, the firm may act as your agent, as a principal selling from or buying for its own inventory, or in another disclosed capacity. Brokerage compensation commonly includes commissions, markups, markdowns, sales loads, or other transaction-related charges. A firm may also receive payments from third parties, such as revenue sharing, that can create financial incentives.
Investment adviser
An investment adviser is generally a person or firm that, for compensation, is in the business of advising others about the value of securities or the advisability of investing in, buying, or selling securities. The definition is broad and usually turns on three practical elements:
- advice or analysis concerning securities;
- provided as part of a business; and
- provided for compensation or another economic benefit.
The advice does not have to be the person’s main business, and the compensation does not always need to appear as a separately labeled “advisory fee.” Investment advisers commonly charge an asset-based fee, flat fee, hourly fee, retainer, or some combination.
The title is not the test
Legal status follows the person’s activities, relationships, and compensation — not simply the title on a business card. A “financial planner” may be an investment adviser, a broker, both, or neither, depending on what the person actually does. Registration is also not the same as government approval or a guarantee of competence.
Can a broker provide investment advice?
Yes. A broker-dealer does not become an investment adviser merely because it gives some investment advice. Federal and Missouri law generally exclude a broker-dealer from the investment-adviser definition when the advice is solely incidental to its brokerage business and the firm receives no special compensation for that advice.
In plain English, advice can remain part of the brokerage relationship when it is connected with and reasonably related to effecting securities transactions. The analysis is based on the facts and circumstances. Advice does not have to be trivial or rare to qualify as incidental, but an ongoing, primarily advisory relationship may fall outside the exclusion.
This is one reason an investor should not assume that receiving advice automatically means the professional is acting as an investment adviser.
The standards of conduct
Brokers: Regulation Best Interest applies to covered retail recommendations
When a broker-dealer or its representative makes a recommendation of a securities transaction or investment strategy to a retail customer, Regulation Best Interest (Reg BI) requires the broker-dealer to act in the customer’s best interest and not place its own interests ahead of the customer’s interests.
Reg BI has four component obligations:
- Disclosure. Disclose material facts about the relationship and the recommendation, including material conflicts.
- Care. Use reasonable diligence, care, and skill to understand the recommendation’s risks, rewards, and costs, and consider reasonably available alternatives.
- Conflict of interest. Establish and enforce policies reasonably designed to identify and address conflicts, including specified financial incentives.
- Compliance. Maintain and enforce written policies and procedures reasonably designed to achieve compliance with Reg BI.
Reg BI is triggered by a recommendation. It generally does not create a continuing duty to monitor a retail brokerage account unless the broker has agreed to do so. FINRA’s suitability rule remains relevant in contexts not covered by Reg BI, but it does not replace Reg BI for recommendations to retail customers that fall within the regulation.
“Is this a recommendation under Regulation Best Interest, and what costs, conflicts, and reasonably available alternatives did you consider?”
Advisers: a fiduciary duty shaped by the agreed relationship
An investment adviser’s federal fiduciary duty includes duties of care and loyalty. The adviser must act in the client’s best interest and may not subordinate the client’s interests to its own.
The duty of care generally includes developing a reasonable understanding of the client’s objectives, providing advice believed to be in the client’s best interest, seeking best execution when the adviser is responsible for selecting executing brokers, and providing advice and monitoring over the course of the relationship.
The duty of loyalty requires the adviser to eliminate conflicts or, at a minimum, provide full and fair disclosure sufficient for the client to give informed consent. Vague boilerplate may not be enough when a conflict actually exists.
The important nuance is scope. An adviser’s fiduciary duty applies to the adviser-client relationship, but the specific obligations depend on the services the adviser agreed to undertake. An adviser engaged only for a limited portfolio or one-time analysis does not necessarily assume responsibility for the client’s entire financial life. An adviser providing comprehensive, ongoing portfolio management usually has broader responsibilities.
“What accounts and issues are within your fiduciary responsibility, what is outside the scope, and how often have you agreed to monitor my situation?”
What dual registration means
Many firms and financial professionals operate in both brokerage and advisory capacities. A dual registrant may manage one account for an asset-based advisory fee and execute transactions in another account for brokerage compensation. The governing standard can therefore depend on the account, service, and recommendation.
That does not mean the professional may switch roles without meaningful disclosure. The client should receive clear information about when the professional is acting in each capacity, how the services and fees differ, and how changes in capacity will be communicated.
“For this recommendation and this account, are you acting as a broker, an investment adviser, or both? Please show me where that is explained in writing.”
Side-by-side comparison
| Feature | Brokerage relationship | Advisory relationship |
|---|---|---|
| Core service | Effecting securities transactions, often with related recommendations | Compensated investment advice, planning, or portfolio management |
| Conduct standard | Reg BI for covered recommendations to retail customers; other obligations may also apply | Fiduciary duty of care and loyalty within the agreed scope |
| When the standard applies | Generally when a recommendation is made to a retail customer | Throughout the adviser-client relationship, as applied to the services undertaken |
| Typical compensation | Commissions, markups, markdowns, sales loads, and other transaction-related or third-party payments | Asset-based, flat, hourly, retainer, or other advisory fees |
| Monitoring | Usually no ongoing duty unless agreed | Often ongoing, but the frequency and scope should be defined by the agreement |
| Capacity | May act as agent or principal, subject to applicable disclosure and other rules | Acts as fiduciary within the advisory relationship |
| Key disclosures | Form CRS, account agreement, trade confirmations, and BrokerCheck record | Form ADV Part 2 brochure, Form CRS when required, advisory agreement, and IAPD record |
Fees matter, but labels do not eliminate conflicts
A commission creates an incentive to recommend transactions. An asset-based fee can create a different incentive, such as encouraging a client to keep more assets under management or discouraging a client from paying down debt with managed assets. Flat and hourly arrangements can also create conflicts depending on their design.
The point is not that one fee model is always clean and another is always conflicted. The better comparison is the total cost, the services received, and the financial incentives attached to each choice.
Ask for a written estimate that includes:
- the firm’s and professional’s direct compensation;
- product-level expenses and sales charges;
- custodial, platform, administrative, and trading costs;
- third-party payments or revenue sharing;
- surrender charges, lockups, or exit costs; and
- how the total changes under reasonable alternatives.
The Missouri registration framework
Missouri regulates broker-dealers, agents, investment advisers, and investment adviser representatives through the Secretary of State’s Securities Division. The state also examines regulated firms and investigates complaints.
Registration of an investment-adviser firm may be state or federal. As a general framework:
- advisers below $100 million in regulatory assets under management are commonly state-registered if the home state registers and examines advisers;
- advisers above $110 million generally register with the SEC; and
- the $100 million to $110 million range functions as a transition buffer, with the answer depending in part on the firm’s existing registration status and other eligibility rules.
There are exceptions, exemptions, notice-filing rules, and special categories, so asset size alone does not answer every registration question. An SEC-registered adviser may still make a notice filing in Missouri, and an individual investment adviser representative may have a separate Missouri registration obligation.
Missouri also has limited de minimis exceptions for certain out-of-state firms with no place of business in the state. Do not assume an exception applies; verify the firm and the individual.
How to check a financial professional
Use more than one database when a person works in both capacities.
- FINRA BrokerCheck. Review brokerage registrations, employment history, examinations, and reportable disclosure events at brokercheck.finra.org.
- SEC Investment Adviser Public Disclosure (IAPD). Review the advisory firm, Form ADV filings, brochure, and available individual information at adviserinfo.sec.gov.
- Missouri Securities Division. Confirm Missouri registration and ask about information that may not be obvious from a national database. The Investor Protection Hotline is 800-721-7996. See the Missouri Securities Division.
A disclosure event is not necessarily a finding of wrongdoing. Read the event’s status, allegations, response, and disposition. Also remember that a clean record does not replace due diligence about services, fees, experience, and conflicts.
What to read before hiring or transferring assets
- Form CRS. A short relationship summary describing services, fees, conflicts, standard of conduct, and disciplinary history.
- Form ADV Part 2A. The advisory firm’s more detailed brochure covering services, fees, methods, conflicts, disciplinary matters, and other business practices.
- Advisory or brokerage agreement. The contract that defines services, authority, monitoring, fees, termination, and dispute provisions.
- Product documents. A prospectus, offering memorandum, annuity contract, private-placement memorandum, or other document explaining the specific investment.
Do not rely on Form CRS alone. It is a useful comparison tool, but it is intentionally brief.
Seven questions worth asking
- In what capacity are you acting for this account and this recommendation?
- What services and monitoring have you agreed to provide, and what is outside the scope?
- What will I pay in dollars and as a percentage, including product and third-party costs?
- What compensation or other benefit will you, your firm, or an affiliate receive?
- What reasonably available alternatives did you consider, including lower-cost options?
- Do you or your firm have reportable disciplinary history, customer disputes, or conflicts I should review?
- Where and how would a dispute be resolved — court, arbitration, or another process?
A note for Missouri founders and business owners raising capital
The broker-dealer question is not limited to Wall Street firms. A company selling its own securities, an employee helping with an offering, or a consultant introducing investors may encounter broker-dealer or agent-registration issues.
The analysis is fact-specific. Relevant facts can include whether a person regularly participates in securities transactions, solicits investors, recommends or negotiates deal terms, handles funds or securities, and receives compensation tied to the size or success of a transaction. Calling someone a “finder” or “consultant” does not decide the issue, and transaction-based compensation is a significant warning sign.
Before agreeing to a success fee or using an unregistered intermediary to raise capital, obtain advice directed to the proposed activities, compensation, offering structure, and jurisdictions involved. See startup and early-stage counsel.
If you suspect misconduct or have a dispute
Act promptly and preserve the record:
- save statements, confirmations, agreements, disclosure forms, emails, text messages, voicemails, and notes;
- write down what was recommended, what was represented, when it occurred, and who was present;
- request an explanation from the firm in writing and retain the response;
- avoid altering original documents or relying only on screenshots when complete files are available;
- contact the Missouri Securities Division when appropriate; and
- speak with qualified counsel about possible deadlines and dispute forums.
For representation in a securities dispute, see FINRA arbitration and investor recovery.
Frequently asked questions
No. Brokerage generally centers on effecting securities transactions. Investment advice generally centers on compensated advice about securities. Some firms and professionals perform both roles.
Not necessarily. The adviser remains a fiduciary, but the specific responsibilities depend on the scope of services the adviser agreed to undertake. Read the advisory agreement and Form ADV, and ask what is excluded.
Reg BI requires a broker-dealer to act in a retail customer’s best interest when making a covered recommendation and not place its interests ahead of the customer’s. The obligation is recommendation-based and does not automatically create ongoing account monitoring.
Yes. Ask which capacity applies to the specific account and recommendation, how the fee changes, and where the capacity is disclosed in writing.
No. Registration provides regulation and public information, but it is not an endorsement, certification of quality, or guarantee against loss.
No. A disclosure may report an allegation, complaint, arbitration, regulatory action, or other event. Review the status and disposition before drawing a conclusion.
Primary sources and further reading:
- Missouri Revised Statutes Section 409.1-102 — definitions
- Missouri Securities Division — broker and adviser registration FAQs
- SEC — Regulation Best Interest, Form CRS, and related interpretations
- SEC — investment adviser fiduciary interpretation
- SEC — solely incidental broker-dealer interpretation
- FINRA — suitability and the relationship to Reg BI
Securities-adjacent questions, handled plainly.
ClearScope Counsel advises on securities-adjacent compliance and registration questions and represents investors in appropriate FINRA disputes. The scope, fee structure, and next steps are explained up front.