Fiduciary vs. broker: What’s the difference, and who should you work with?

A fiduciary, or fiduciary financial planner, is a financial advisor who is legally bound to act in their client's best interest at all times. This means fiduciaries must put their clients' needs ahead of their own, and are required to disclose any potential conflicts of interest. 

In practice, this means a fiduciary must recommend the option that is genuinely best for you, even if a different option would be more profitable for them. Fiduciaries are typically compensated through fee-only arrangements, such as a flat fee, hourly rate, or percentage of assets under management, rather than commissions on products sold.

A broker-dealer is a company or individual in the business of buying and selling securities on behalf of clients. Brokers can help you access a wide range of investment products, including stocks, bonds, mutual funds, annuities, and insurance products.

Since June 2020, brokers have been subject to the SEC's Regulation Best Interest (Reg BI), which replaced the older suitability standard. Under Reg BI, brokers must act in your best interest when making a recommendation and must disclose material conflicts of interest. However, Reg BI does not impose an ongoing fiduciary duty. The obligation applies at the time of the recommendation, not across the broader relationship.

Brokers are often compensated through commissions on products they sell. While Reg BI requires brokers to disclose these conflicts and establish policies to mitigate them, it does not require them to eliminate commission-based compensation entirely. This is one of the key structural differences between working with a broker and working with a fiduciary.

Brokers aren’t necessarily fiduciaries, though they can be.

While both brokers and fiduciaries are financial professionals, they operate under different legal standards. However, some professionals hold dual registration, meaning they are registered as both a broker-dealer and an investment adviser. In these cases, the standard that applies depends on the capacity in which they are acting at the time.

This is where it can get confusing. A dually registered professional may act as a fiduciary when providing ongoing investment advice and as a broker when executing a specific transaction or selling a product. The SEC refers to this as "capacity switching," and it means the level of protection you receive can change depending on the type of interaction.

To understand your protections, consider asking a few direct questions:

• Are you acting as a fiduciary at all times when working with me?

• How are you compensated, and do you earn commissions on specific products?

• Will you disclose when you are acting in a brokerage capacity rather than an advisory one?

These questions can help you evaluate the trustworthiness of your advisor and understand the standard of care they owe you in any given interaction.

A fiduciary designation can be an important signal, but consumers shouldn't stop there. “It's worth understanding how an advisor is compensated,” Jonathan Soobin Kim, CFO, US, at Raisin explained. “Whether they are required to act as a fiduciary at all times is key, but the real test is how they handle potential conflicts of interest. True fiduciaries must explicitly lay out where those conflicts exist and, crucially, how they actively mitigate them to keep the client's interests first. Ultimately, trust is built through that level of transparency.

Both brokers and fiduciaries serve legitimate roles, and the right choice depends on what you need. As your financial situation evolves, you may benefit from one, the other, or both at different stages. 

Here’s a quick breakdown: 

In general, a fiduciary is a stronger fit when you want objective, ongoing advice and a long-term relationship built on comprehensive planning. A broker is more appropriate when you need to execute specific transactions or access particular investment or insurance products.

Weighing automated options, too? Our guide to robo-advisors vs. financial advisors covers that comparison in detail.

When choosing a financial advisor, understanding the difference between a fiduciary and a broker helps you evaluate the advice you receive and the incentives behind it. 

Fiduciaries owe you an ongoing duty to act in your best interest. Brokers must act in your best interest at the point of recommendation under Reg BI, but their obligations are more limited in scope.

Neither option is inherently better for all situations. What matters most is that the professional you work with is transparent about their compensation, their conflicts, and the standard of care they follow. 

Knowing what to ask (and what the answers mean) puts you in a stronger position regardless of which type of advisor you choose. 

"The fiduciary label can be helpful, but it shouldn't be the end of the conversation,” Kim said. “Consumers are often better served by focusing on transparency, incentives, and communication. A good advisor shouldn't just claim the fiduciary title; they should be able to clearly explain how they're compensated, put any potential conflicts of interest plainly on the table, and detail the exact steps they take to mitigate them. It’s about helping clients understand both why a recommendation is being made and the framework protecting them."

If you're looking for a straightforward way to grow your savings while you evaluate your broader financial strategy, Raisin gives you access to high-yield savings accounts and CDs across multiple federally insured banks and credit unions, all from a single login.

The above article is intended to provide generalized financial information designed to educate a broad segment of the public; it does not give personalized tax, investment, legal, or other business and professional advice. Before taking any action, you should always seek the assistance of a professional who knows your particular situation for advice on taxes, your investments, the law, or any other business and professional matters that affect you and/or your business.