Fee Structures for Financial Planners: Fee-Only, AUM, and Commission

How a financial planner charges for services determines not only cost but also the incentive structure governing the advice relationship. The three dominant compensation models in the United States — fee-only, assets under management (AUM), and commission-based — each carry distinct regulatory implications, conflict-of-interest profiles, and suitability for different client situations. Understanding how these structures are classified and regulated is foundational for anyone evaluating financial planning services, as documented across the financial planning sector.

Definition and Scope

Compensation structures in financial planning are classified by the source of the planner's revenue. The Securities and Exchange Commission (SEC) and the Financial Industry Regulatory Authority (FINRA) both require that advisers disclose compensation arrangements, primarily through Form ADV for registered investment advisers and through FINRA's BrokerCheck system for broker-dealers. These disclosures are not optional — Regulation Best Interest (Reg BI), adopted by the SEC in June 2020, formally requires broker-dealers to act in a retail customer's best interest and to disclose material conflicts including compensation arrangements (SEC Reg BI, 17 CFR §240.15l-1).

Three primary compensation categories operate across the US financial planning sector:

Fee-Only — The planner receives compensation exclusively from the client, in the form of flat fees, hourly rates, retainers, or subscription arrangements. No third-party commissions or revenue-sharing arrangements are accepted.
Assets Under Management (AUM) — The planner charges a percentage of the assets the client holds in managed accounts. A common industry benchmark is 1% of AUM annually, though rates vary by portfolio size and service scope.
Commission-Based — The planner earns compensation through the sale of financial products — such as mutual funds, annuities, or insurance policies — from product manufacturers or distributors.

A fourth hybrid model, sometimes called fee-based, combines client-paid fees with commission income. The National Association of Personal Financial Advisors (NAPFA) restricts its membership to true fee-only advisers and prohibits commission acceptance as a condition of membership. The Certified Financial Planner Board of Standards (CFP Board) requires CFP® professionals to disclose their compensation method in the engagement agreement before providing financial advice.

How It Works

Each compensation model operates through a distinct payment mechanism and generates a different conflict-of-interest profile.

Fee-Only planners bill clients directly. Hourly rates across the sector range broadly — NAPFA's published member data reflects rates from approximately $150 to $400 per hour depending on credentialing and geography. Flat-fee engagements for a comprehensive financial plan commonly range from $1,500 to $7,500 (CFP Board Consumer Guide). Retainer arrangements provide ongoing advisory access for a fixed annual or monthly fee. Because no third-party revenue is received, the conflict profile is structurally limited to the scope of work billed.

AUM-based planners charge a percentage of assets held in accounts they manage. The fee is typically deducted quarterly from account balances. At a 1% annual AUM rate, a $500,000 portfolio generates $5,000 per year in advisory fees. This model creates an inherent alignment incentive — portfolio growth increases both client wealth and adviser revenue — but it also creates a disincentive to recommend strategies that reduce AUM, such as paying down a mortgage or purchasing an annuity that moves assets off the managed platform.

Commission-based planners earn revenue when clients purchase specific financial products. Under FINRA rules, registered representatives are required to recommend products that satisfy the Regulation Best Interest standard for retail customers. Insurance-only planners fall under state insurance commissioner oversight rather than SEC or FINRA jurisdiction, and their compensation structure is governed by state-specific insurance codes.

The regulatory framework governing these models is detailed further in the regulatory context for financial planning, including the fiduciary standard applicable to registered investment advisers under the Investment Advisers Act of 1940.

Common Scenarios

Different compensation structures align with different client profiles and planning needs:

Fee-only hourly or flat-fee arrangements are common for one-time engagements: pre-retirement income projections, divorce financial analysis, or evaluation of a defined-benefit pension election. Clients with investable assets below $250,000 who do not require ongoing portfolio management often find this model more cost-effective than AUM-based arrangements.
AUM-based arrangements are standard for clients seeking ongoing portfolio management alongside financial planning services. Most independent registered investment advisory (RIA) firms use an AUM fee schedule with breakpoints — for example, 1.00% on the first $1 million, 0.75% on assets between $1 million and $3 million, and 0.50% on assets above $3 million.
Commission-based arrangements are typical in the sale of whole life insurance, variable annuities, and certain mutual fund share classes (particularly Class A or Class B shares with front-end or back-end loads). FINRA's Fund Analyzer tool allows investors to compare the cost impact of different share classes and load structures.
Fee-based hybrid models appear frequently in wirehouse and bank-affiliated planning practices, where the same adviser manages a fee-based investment account while also selling insurance or annuity products for commission.

Decision Boundaries

Distinguishing between these models requires examining four structural factors:

Revenue source — Client-paid fees only (fee-only) versus third-party product compensation (commission) versus a percentage of managed assets (AUM). Form ADV Part 2A, filed by registered investment advisers with the SEC, discloses this information publicly through the Investment Adviser Public Disclosure database.
Fiduciary obligation — Registered investment advisers are held to the fiduciary standard under the Investment Advisers Act of 1940, requiring them to act in the client's best interest at all times. Broker-dealers operating under Reg BI are held to a "best interest" standard that is related but distinct — it does not impose a continuous fiduciary duty in the same manner.
Cost trajectory — AUM fees scale with portfolio growth; a client whose portfolio grows from $500,000 to $1,500,000 over 15 years will pay proportionally more in absolute dollar terms even if the percentage rate stays constant. Flat or hourly fees do not scale with asset accumulation.
Scope of services — Commission-based arrangements typically compensate for product transactions, not for comprehensive planning. Fee-only and AUM models more commonly include holistic planning services covering retirement planning, tax strategy, estate coordination, and insurance review.

The CFP Board's Standards of Conduct, updated effective June 30, 2020, require all CFP® professionals — regardless of compensation model — to act as a fiduciary when providing financial planning services (CFP Board Code of Ethics and Standards of Conduct). This applies across all three compensation structures whenever the engagement constitutes financial planning as defined by the CFP Board's Practice Standards.

References

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