What is the best fee structure for a financial advisor?
The best fee structure for a fee-only fiduciary advisor depends on your situation. The simple rule: pick the model where the fee tracks the work, not the size of your account. For most households with a complex setup and a modest portfolio — business owners, people with equity comp, doctors, families with a lot of real estate or a big pension — a flat annual retainer is the cleanest fit. For households whose net worth lives almost entirely in invested accounts, AUM still works. It is the most common model in the industry. For one-time questions or a second opinion, hourly is the right fit. For a single deliverable like a financial plan or a rollover decision, a project fee is the right fit. The one model to avoid is the commission-based "no fee" advisor. There is no such thing as free advice. The cost is just hidden inside the products they sell you.
Match the fee model to the situation
| Your situation | Best fee model | Typical cost |
|---|---|---|
| $1M+ portfolio, simple household | AUM, ~0.85% | $8,500/yr on $1M |
| Complex household, modest portfolio | Flat retainer | $5K–$10K/yr |
| Business owner, equity comp | Flat retainer | $7.5K–$15K/yr |
| One-time question or second opinion | Hourly | $200–$500/hr |
| Need a financial plan, then DIY | Project fee | $2.5K–$5K |
| Just starting out | Hourly or robo + plan | Under $2K/yr |
Why AUM is over-applied
The AUM model became the default because it scales easily for the firm: more assets = more fee. But that math works for the firm, not always for the client. A household with $400K invested and $2M of business equity is paying $4,000 a year on AUM and getting advice on the bigger $2M problem for free. A flat retainer in the same situation usually charges $7,500 and actually does the work.
Why commission models lose
A 5% front-load on a $200K mutual fund purchase is a $10,000 commission paid the day you buy. Even if the headline "advisory fee" is zero, you have just paid four years of a fee-only advisor in one transaction. The product disclosure shows it; the marketing pitch usually does not.
How to confirm the fee model in writing
Ask the advisor to send a short email that lists every way the firm gets paid. A fee-only firm will reply with a one-line list: "We are paid only by client fees." A fee-based firm will list more lines. Save the email. Anything that contradicts it later is a problem worth raising.