A fiduciary is a person or institution legally required to act in your best interest, not their own. In the context of financial advice, it means your advisor must recommend what’s best for you — even if that means lower commissions or fees for them.
The alternative is a suitability standard, which only requires that a recommendation be “suitable” for you — a much lower bar that allows advisors to recommend products that benefit them as long as the product isn’t obviously wrong for you.
The two standards: fiduciary vs. suitability
Fiduciary standard:
- Must recommend the best option for the client
- Must disclose conflicts of interest
- Must avoid or manage conflicts of interest
- Applies to: Registered Investment Advisors (RIAs), fee-only financial planners
Suitability standard:
- Must only recommend products that are “suitable” for the client
- Does not require disclosing all conflicts of interest
- Historically applied to: broker-dealers, insurance agents, many commission-based advisors
Example of the difference: You have $100,000 to invest and two comparable S&P 500 index funds are available — one with a 0.03% expense ratio and one with a 0.75% expense ratio that pays a commission to your advisor. Under suitability, both might be considered “suitable.” Under fiduciary duty, the advisor must recommend the lower-cost fund.
The regulatory landscape in 2026
The SEC’s Regulation Best Interest (Reg BI), implemented in 2020, raised the standard for broker-dealers but didn’t create a full fiduciary requirement. As of 2026, broker-dealers must act in clients’ “best interest” at the time of a recommendation — but this is not the same as the ongoing fiduciary standard that applies to RIAs.
RIAs (Registered Investment Advisors): Regulated by the SEC or state securities regulators, depending on assets under management. Required to act as fiduciaries at all times, not just at the moment of a recommendation.
Broker-dealers: Registered with FINRA, regulated under Reg BI. Higher standard than before 2020, but not full fiduciary.
Insurance agents: Generally regulated at the state level. Suitability standard typically applies for annuity sales (some states have adopted higher standards).
The simplest filter: ask directly, “Are you a fiduciary, and will you confirm that in writing?”
Types of financial advisors and compensation models
Fee-only: Paid only by you — flat fee, hourly rate, or percentage of assets under management. No commissions. All fee-only advisors who are RIAs are fiduciaries. This is the cleanest structure.
Fee-based: Paid by you and by commissions on products they sell. Fiduciary duty may apply to some parts of the relationship but not others. Requires careful disclosure review.
Commission-based: Paid primarily through commissions on products sold. May or may not be a fiduciary depending on their registration.
The key insight: compensation structure determines incentives. A fee-only advisor has no financial reason to steer you toward a particular product. A commission-based advisor does.
How to verify if an advisor is a fiduciary
Check BrokerCheck (FINRA): brokercheck.finra.org — shows registration, disciplinary history, and whether the advisor is a broker-dealer or investment advisor.
Check the SEC’s Investment Adviser Public Disclosure (IAPD): adviserinfo.sec.gov — confirms RIA registration.
Look for the CFP designation: Certified Financial Planners (CFPs) are required to act as fiduciaries when providing financial planning services (as of 2019 CFP Board standards). Not all CFPs are fiduciaries in all contexts — those who are also broker-dealers have the dual registration issue — but CFP + fee-only is a strong combination.
Ask directly and in writing: “Are you a fiduciary? Will you provide written confirmation that you will act in my best interest at all times?” A genuine fiduciary advisor will confirm this without hesitation.
When fiduciary duty matters most
Retirement account rollovers: When you roll over a 401(k) to an IRA, an advisor recommending you move assets to their platform has a potential conflict. A fiduciary must analyze whether the rollover is actually in your interest. A suitability advisor technically needs only to confirm the new account is “suitable.”
Annuity recommendations: Variable and indexed annuities carry high commissions (often 6–8%). A non-fiduciary advisor has strong financial incentive to recommend these. A fiduciary must compare them to lower-cost alternatives.
Life insurance: Whole life, universal life, and similar permanent insurance products carry significant commissions. In many cases, term insurance plus separate investments is cheaper and more effective. A fiduciary must analyze this honestly.
Investment selection: Even in straightforward index fund investing, expense ratios matter. A fiduciary shouldn’t recommend higher-cost funds when equivalent lower-cost options exist.
Is a financial advisor necessary?
For many people with straightforward finances — especially early in their investing journey — no. A simple three-fund portfolio in a Roth IRA or 401(k) doesn’t require an advisor. The cost of professional advice (often 1% of assets annually) compounds against you the same way investment returns compound for you.
Where advisors add genuine value: complex tax situations, estate planning with significant assets, coordinating multiple income sources in retirement, or behavioral coaching during market downturns.
If you do hire one: fee-only, fiduciary, with CFP or similar credentials, and with transparent fee disclosure.
FAQ
Can an advisor be a fiduciary for some services but not others?
Yes. Some advisors have dual registration — they’re RIAs (fiduciary) for investment management and broker-dealers (suitability) for product sales. This can mean fiduciary standards apply when managing your portfolio but suitability standards apply when recommending specific products. Ask for clear written disclosure.
Does working with a robo-advisor involve fiduciary duty?
Most robo-advisors operate as RIAs and are therefore fiduciaries. They’re also fee-only by structure, since they charge a flat management fee without commissions.
Is 1% AUM fee standard?
It’s common but not universal. 1% annually is typical for traditional wealth management. Robo-advisors typically charge 0.25–0.50%. Fee-only planners charging hourly rates ($200–400/hour) or flat annual fees ($2,000–5,000/year) may be more cost-effective for straightforward situations.
How do I find a fee-only fiduciary advisor?
NAPFA (National Association of Personal Financial Advisors) maintains a searchable directory of fee-only advisors at napfa.org. The Garrett Planning Network focuses on hourly and project-based fee-only advice for those who don’t need ongoing management.