RIA vs. Broker-Dealer: Key Differences
Registered investment advisers (RIAs) and broker-dealers are both regulated financial intermediaries, but they operate under different regulatory frameworks, compensation structures, and standards of care.
Definition
RIA vs. Broker-Dealer —
A registered investment adviser (RIA) is a person or firm that provides investment advice for compensation and is registered with the SEC (assets under management ≥ $110 million) or state securities regulators (AUM below the federal threshold). A broker-dealer is a person or firm in the business of effecting transactions in securities for its own account or for the accounts of others. The key regulatory distinction: RIAs owe clients a fiduciary duty under the Advisers Act; broker-dealers owe retail customers a best-interest obligation under Reg BI when making recommendations.
Side-by-side comparison
| Registered Investment Adviser | Broker-Dealer | |
|---|---|---|
| Primary regulator | SEC (or state) | FINRA + SEC |
| Registration form | Form ADV | Form BD |
| Standard of care | Fiduciary (continuous) | Best interest at time of recommendation (Reg BI) |
| Compensation | Fee-based (AUM %, flat, hourly) | Commissions, markups, 12b-1 fees |
| Disclosure | Form ADV Part 2 brochure | Form CRS + transaction-specific |
| Ongoing obligations | Continuous duty to monitor | At time of recommendation |
| Custody rules | Advisers Act Rule 206(4)-2 | SEC Rules 15c3-1/3 |
The fiduciary distinction
RIAs owe clients an undivided duty of loyalty (act in the client's best interest and avoid conflicts) and a duty of care (provide advice that is suitable given the client's circumstances). This duty applies continuously — not just at the moment of a transaction.
Broker-dealers under Reg BI (effective June 2020) must act in the best interest of retail customers when making recommendations, but this is a transaction-level obligation, not a continuous one. The distinction matters for ongoing portfolio monitoring and proactive advice.
Dual registration
Many firms operate as both RIAs and broker-dealers, or have affiliated entities in both roles. In that case, both regulatory frameworks apply, and the firm must track which hat it's wearing in each client interaction. Conflicts of interest arising from dual registration must be disclosed.
Choosing the right structure
For clients seeking ongoing, holistic financial planning and investment management, an RIA relationship typically aligns better — the continuous fiduciary duty matches the ongoing nature of that service. For clients executing specific transactions, a broker-dealer relationship may be appropriate — the best-interest standard applies at the point of recommendation.
Related
This glossary entry is general information, not legal advice.
Keep reading
All glossary →Fiduciary Standard
The fiduciary standard requires investment advisers to act in the best interest of their clients, putting client interests ahead of their own. It is the highest standard of care in financial services.
Reg BI (Regulation Best Interest)
Regulation Best Interest (Reg BI) is an SEC rule requiring broker-dealers to act in the best interest of retail customers when making investment recommendations. Effective June 30, 2020.
Books and Records (Investment Adviser)
The books and records rules require registered investment advisers and broker-dealers to maintain specific records for defined retention periods. SEC Rule 204-2 governs RIAs; Rule 17a-4 governs broker-dealers.