Fiduciary fees generally follow one of a few predictable patterns: an investment adviser who acts as a fiduciary usually charges around 1% of the assets they manage for you each year, or bills by the hour, by the project, or on retainer; a trustee or executor is paid under the trust document, a state statute, or a court’s judgment of what’s reasonable. In every case, the fee has to be spelled out in writing before you agree to it, and if the charges don’t match the work, there are routes to challenge them.
What “Fiduciary” Means for the Fee You Pay
A fiduciary is legally required to put your interests ahead of their own. For investment advice, that duty comes from the Investment Advisers Act of 1940, which courts read as imposing a federal fiduciary duty of care and loyalty on Registered Investment Advisers and their representatives.1Securities and Exchange Commission. Commission Interpretation Regarding Standard of Conduct for Investment Advisers Trustees and estate executors are also fiduciaries, but their fees follow a different set of rules.
The everyday consequence is compensation. A “fee-only” fiduciary adviser earns money solely from what you pay directly. They don’t collect commissions from mutual fund or insurance companies for pushing you into particular products, and the Advisers Act makes it unlawful to engage in any practice that operates as a fraud or deceit on a client, which reaches hidden compensation.2Office of the Law Revision Counsel. 15 US Code 80b-6 – Prohibited Transactions by Investment Advisers An adviser who does receive third-party payments has to disclose them and explain the conflict.
One boundary worth flagging: brokers are not investment advisers. Since 2020, broker-dealers operate under Regulation Best Interest, which requires them to act in a retail customer’s best interest on recommendations but doesn’t impose the ongoing fiduciary duty that applies to advisers.3Securities and Exchange Commission. Regulation Best Interest – The Broker-Dealer Standard of Conduct If someone says they’re a fiduciary, ask whether they’re registered as an investment adviser or as a broker-dealer. The answer changes which fee models are in play and what protections you have.
How Investment Adviser Fees Are Structured
Fiduciary investment advisers use four main compensation models, sometimes in combination. The one that fits you depends on how much you have invested, how complicated your financial life is, and whether you need ongoing management or a single decision reviewed.
Percentage of Assets Under Management
The most common model charges a percentage of the portfolio the adviser manages for you, usually billed quarterly. The median human adviser sits around 1% per year. Automated platforms can run as low as 0.25% to 0.50%. Most firms use a tiered schedule that lowers the percentage as your portfolio grows: you might pay 1% on the first $1 million and 0.75% on assets above that, giving you a blended rate that shrinks as your account expands.
An AUM fee usually bundles portfolio management, trade execution, and ongoing planning into one charge. It also links the adviser’s income to your account value, so they earn more when the portfolio grows and less when it shrinks. Where the model gets expensive is at higher balances. One percent of $3 million is $30,000 a year, which may exceed the value of what the adviser actually does, and larger accounts are often where a rate negotiation makes sense.
Hourly Fees
Hourly billing suits targeted questions rather than continuous management. Rates typically run $150 to $400 an hour depending on credentials and location, with specialists in major metros charging $500 or more. You and the adviser agree on scope and estimated hours upfront so the cost stays predictable. This is a good fit when you have one decision to work through: whether to exercise stock options, how to handle an inheritance, how to sequence retirement withdrawals.
Flat Fees and Retainers
A flat fee buys a defined piece of work for a set price regardless of your asset level. A comprehensive financial plan usually runs $2,500 to $8,000 depending on complexity. Retainers are the subscription version: a fixed monthly or annual fee for ongoing access to planning advice and periodic reviews. This model has grown among younger professionals with complicated compensation — equity awards, multiple retirement accounts, student loan planning — who don’t yet have enough investable assets to make an AUM arrangement work for either side.
Blended Arrangements
Plenty of advisers combine methods. A common pairing charges a lower AUM fee for portfolio management plus a separate flat fee for the initial plan. Another uses a base retainer for planning with an AUM fee that kicks in only above a certain asset threshold. Blends let the adviser price each service against the actual work involved instead of forcing everything into one billing method.
How to See the Fee Before You Sign
Regulators require layered disclosures so you can price an adviser before committing. Two documents matter for advisory clients, and a separate set of rules applies to retirement plan providers.
Form ADV Part 2
Every registered investment adviser has to deliver a written brochure — Form ADV Part 2A — to prospective clients before or at the time you sign the advisory agreement. Item 5 requires the full fee schedule, states whether fees are negotiable, discloses whether the adviser deducts fees from your accounts or bills you separately, and explains billing frequency. The brochure also has to describe other costs you’ll pay, such as custodial fees and mutual fund expense ratios.4U.S. Securities and Exchange Commission. Form ADV Part 2 – General Instructions
If the adviser or anyone they supervise earns compensation from selling investment products — commissions, asset-based sales charges, mutual fund service fees — Item 5 requires disclosure of that conflict of interest and how they address it. Advisers who get more than half their revenue from such commissions have to say so specifically.4U.S. Securities and Exchange Commission. Form ADV Part 2 – General Instructions
Form CRS Relationship Summary
Since 2020, both investment advisers and broker-dealers must give retail investors a brief relationship summary, Form CRS. The two-page document is meant to give you a plain-language overview of services, fees, conflicts of interest, and disciplinary history at the start of the relationship, and the firm has to update it after any material change.5Securities and Exchange Commission. Form CRS Relationship Summary – Amendments to Form ADV When delivered electronically, it must link to fee schedules and may include fee calculators.6U.S. Securities and Exchange Commission. Form CRS Relationship Summary
Form CRS is a supplement, not a replacement, for Form ADV Part 2. It’s useful for a fast side-by-side of two firms. Before you sign, read the full ADV Part 2, because the detailed fee mechanics live there.
ERISA Disclosure for Retirement Plans
Fiduciaries handling assets inside employer plans like 401(k)s face separate obligations under the Employee Retirement Income Security Act, which requires plan fiduciaries to act prudently and to ensure that service arrangements are reasonable.7eCFR. 29 CFR 2550.404a-5 – Fiduciary Requirements for Disclosure in Participant-Directed Individual Account Plans
Under the Section 408(b)(2) regulations, any service provider expecting $1,000 or more from a covered plan has to give the responsible plan fiduciary written disclosures describing the services, all direct and indirect compensation (including revenue sharing and payments among affiliates), and how the compensation will be paid.8eCFR. 29 CFR 2550.408b-2 – General Statutory Exemption for Services or Office If the provider skips the required disclosures, the arrangement isn’t reasonable, which makes it a prohibited transaction under ERISA.9U.S. Department of Labor. Fact Sheet – Service Provider Disclosure Regulation That consequence keeps providers disclosing everything upfront.
Trustee and Executor Fees
Fees for trustees and estate executors work nothing like advisory fees. Instead of market negotiation and SEC filings, they’re governed by the trust document, state law, and often direct court oversight. The fees pay for administrative work — managing property, paying debts, filing tax returns, distributing assets — not investment advice.
Trustee Compensation
A trustee’s fee is set first by whatever the trust document says. If the document names a percentage or a dollar amount, that generally controls. Many trust instruments just say the trustee gets “reasonable compensation,” which leaves the number to be worked out.
When the document is silent or vague, state law fills in. Courts assessing reasonableness look at the size and complexity of the assets, the time the trustee spent, the level of responsibility, and the results. Professional trust companies typically charge 1% to 1.5% of trust assets per year, often with a minimum annual charge. Individual trustees serving family trusts can still claim reasonable compensation, though courts may look harder at their hourly value. Even when a trust document sets a specific fee, a court can adjust it if the actual duties turned out to be very different from what the grantor expected.
Executor Compensation
Executor fees — sometimes called personal representative fees — follow state-specific rules that split into two groups. A minority of states set compensation by statute using a percentage of the gross estate on a tiered schedule, generally running about 1.5% to 5% depending on the state and estate size. The fee is calculated on gross value before debts, because the administrative work of inventorying and managing assets exists no matter what the estate owes.
Most states instead entitle the executor to reasonable compensation, which the probate court sets using factors similar to those for trustees: complexity, time, skill required, and efficiency. Courts respond well to fees when the executor can show they saved money or resolved disputes efficiently. Detailed time records matter here. Even executors billing a percentage should document their hours, because a beneficiary can challenge the amount and the court will want to see what the executor actually did.
Extraordinary Services
Standard fees cover routine administration: collecting assets, paying bills, filing inventories, making distributions. When the work goes beyond routine, the fiduciary can usually ask for additional compensation for extraordinary services. Common examples are handling contested claims or will disputes, selling real property, dealing with tax audits, running the decedent’s business, and working through environmental or zoning issues on estate assets. These additional fees generally need separate court approval and should be backed by detailed records showing why the work fell outside normal duties.
Two Layers of Fees
If a trustee or executor hires an outside investment adviser to manage the portfolio, the adviser’s AUM fee is a separate charge paid by the trust or estate. The fiduciary’s own fee pays for oversight, administration, distributions, and compliance, not the investment management itself. A trust with a corporate trustee and an outside adviser is paying two layers, which is worth pricing out when you’re evaluating total cost.
Are Fiduciary Fees Tax Deductible?
Deductibility has shifted in recent years, and the rules now split sharply between individuals and trusts.
Individuals
If you pay an investment adviser out of your own accounts, the fee is not deductible on your federal return. Investment advisory fees used to be miscellaneous itemized deductions subject to a 2% floor under Internal Revenue Code Section 67. The Tax Cuts and Jobs Act suspended those deductions starting in 2018, and 2025 amendments made the elimination permanent by removing the original sunset date.10Office of the Law Revision Counsel. 26 US Code 67 – 2-Percent Floor on Miscellaneous Itemized Deductions There is no current path to deducting investment management fees on a personal return.
Trusts and Estates
Trusts and estates get better treatment, but only for certain costs. Under Section 67(e), administration expenses that would not have been incurred if the property were not held in a trust or estate are treated as above-the-line deductions and are not affected by the permanent elimination of miscellaneous itemized deductions.10Office of the Law Revision Counsel. 26 US Code 67 – 2-Percent Floor on Miscellaneous Itemized Deductions Trustee fees, executor fees, probate attorney fees, and accounting fees specific to trust or estate administration clearly qualify.
The complication is bundled fees, meaning a single charge that covers both trust-specific administration and services an individual would also pay for, such as investment management. IRS guidance requires bundled fees to be allocated between the deductible trust-specific portion and the non-deductible portion a hypothetical individual investor would also pay.11Internal Revenue Service. Notice 2018-61 – Clarification Concerning the Effect of Section 67(g) on Trusts and Estates The investment management slice remains non-deductible. If your trust pays a corporate trustee one annual fee covering both, insist on a breakdown showing how much goes to each function.
Reporting
Trusts and estates that pay $600 or more in fiduciary fees during the year must report the payments on Form 1099-NEC or Form 1099-MISC, depending on the nature of the services. Trusts of qualified pension or profit-sharing plans and tax-exempt organizations are specifically included.12Internal Revenue Service. Instructions for Forms 1099-MISC and 1099-NEC Personal payments you make to an adviser from your own pocket for personal planning are not subject to 1099 reporting.
Pushing Back on a Fee That Looks Too High
The fiduciary standard requires not just disclosure but that fees be reasonable relative to the services provided. When they aren’t, you have options.
Investment Advisers
The primary enforcement route for excessive advisory fees runs through the SEC and state securities regulators. The antifraud provisions of the Investment Advisers Act reach any practice that operates as a fraud or deceit on a client, and charging unreasonable fees while failing to deliver the promised services can fall inside that prohibition.2Office of the Law Revision Counsel. 15 US Code 80b-6 – Prohibited Transactions by Investment Advisers Practically, start by comparing the actual charges against the adviser’s Form ADV Part 2 disclosures. If they don’t match, file a complaint with the SEC or your state securities regulator. You can also terminate the relationship; most advisory agreements allow termination with notice, and prepaid fees must be refunded pro rata.
Trustees and Executors
Beneficiaries and other interested parties can object to trustee or executor fees in the supervising court. Grounds include fees that are excessive relative to the work performed, lack of transparency in how the fees were calculated, evidence of negligence or mismanagement, and situations where the fiduciary billed the estate for work someone else actually did. The objector carries the burden of showing the fees are unreasonable or that the fiduciary breached their duty.
Courts hearing fee disputes apply the same factors they use to set reasonable compensation: size and complexity of the estate or trust, time and skill involved, and whether the administration was efficient and done in good faith. A fiduciary with detailed time records who can show their work preserved or increased the estate’s value has a much easier time defending a fee than one who took a percentage and can’t explain what they did to earn it. If the court finds the fee unreasonable, it can reduce the compensation, and in egregious cases surcharge the fiduciary for losses caused by mismanagement.