What Is a Fiduciary Financial Advisor?

If you’ve been researching financial advisors, you’ve probably encountered the word “fiduciary.” It gets used in marketing materials and advisor bios — often without much explanation of what it actually means.

The short version: a fiduciary is legally required to act in your best interest. A non-fiduciary is not. That difference has real consequences.

The two standards in financial advice

Under the suitability standard, an advisor must recommend products that are “suitable” for a client — appropriate for their general situation. A suitable recommendation doesn’t have to be the best option. A high-commission annuity can be a suitable recommendation even if a lower-cost alternative would serve you better.

Under the fiduciary standard, an advisor must act in the client’s best interest — period. They must disclose conflicts of interest, recommend the most appropriate option, and put client interests ahead of their own compensation.

Why it matters in practice

On a $500,000 portfolio, the difference between a 1% expense ratio fund and a 0.05% fund is roughly $4,750 per year. Over 20 years, compounded, the difference is well into six figures. Both might be “suitable.” Only one is fiduciary.

Fee structures and conflicts of interest

Understanding how an advisor is compensated reveals their incentives. Fee-only advisors (compensated solely by client fees, no commissions) have the most aligned structure. Fee-based advisors receive both fees and commissions — conflicts must be disclosed. Commission-only advisors are compensated entirely by product commissions.

The one question to ask

Before hiring any financial advisor, ask: “Are you a fiduciary, and will you put that in writing?” You can also verify an advisor’s registration and any disciplinary history at FINRA BrokerCheck — free and public.