A family management company survives IRS scrutiny only if it operates as a genuine trade or business, and the family management company tax rules that decide the outcome sit in a handful of code sections that test whether the entity is a real service business or a repackaged personal expense account. The stakes are now permanent: Congress eliminated the individual deduction for investment-management expenses with no scheduled return, so professional fees, staff, and administrative costs a wealthy family pays directly produce no write-off at all.1Office of the Law Revision Counsel. 26 USC 67 – 2-Percent Floor on Miscellaneous Itemized Deductions Route the same spending through a legitimate business entity and it becomes deductible. Fail the trade-or-business test and the deductions vanish, the losses freeze, and prior years come back into scope.
The Trade or Business Test Is Where Everything Turns
Costs of running a genuine trade or business are fully deductible as ordinary and necessary expenses.2Office of the Law Revision Counsel. 26 USC 162 – Trade or Business Expenses Costs of managing investments or producing income fall under a different provision that once allowed a floor-based individual deduction, and that deduction is gone.3Office of the Law Revision Counsel. 26 USC 212 – Expenses for Production of Income The Tax Cuts and Jobs Act suspended it starting in 2018, and the One Big Beautiful Bill Act removed the sunset. There is no scheduled return.
The IRS looks for three things when it evaluates trade-or-business status: regular and continuous activity, a genuine profit motive, and a scope of services broad enough to distinguish the company from passive asset watching. A company that only monitors one trust’s portfolio and pays the trust’s bills looks like a cost-shifting arrangement. A company that runs payroll, coordinates insurance, manages property, oversees tax compliance, and provides administrative support across multiple family entities looks like a business.
Profit Motive and the Three-of-Five Safe Harbor
Fees set only to reimburse costs raise a red flag. The IRS expects a management company to charge enough to cover overhead and produce a reasonable margin, the way any outside service provider would. Show a profit in at least three of five consecutive tax years and a statutory presumption kicks in that the activity is carried on for profit.4Office of the Law Revision Counsel. 26 USC 183 – Activities Not Engaged in for Profit Miss the safe harbor and you’re not automatically disqualified, but the burden shifts to you: business plans, pricing benchmarks, and documented cost controls become your evidence.
If the IRS concludes there’s no genuine profit motive, it can reclassify the operation as a hobby. Deductions then cap at the income the activity generates, and the losses you were counting on to offset other income disappear.
Choosing an Entity Form
The legal form shapes how the company files, how income flows to the owners, and which benefits are available. Most families pick one of three.
- A single-member LLC treated as a disregarded entity puts income and expenses directly on the owner’s Schedule C. Simplest to file, but the owner pays self-employment tax on all net income.
- A multi-member LLC taxed as a partnership files Form 1065 and issues a Schedule K-1 to each member, passing income and deductions through without entity-level tax.5Internal Revenue Service. About Form 1065, U.S. Return of Partnership Income
- An S corporation files Form 1120-S and similarly passes income through, but it lets you split compensation between a reasonable salary (subject to payroll taxes) and distributions (not subject to self-employment tax), which can reduce the overall tax bill.6Internal Revenue Service. About Form 1120-S, U.S. Income Tax Return for an S Corporation
All three are pass-throughs, so the company itself generally pays no income tax. Pass-through status also unlocks the qualified business income deduction, which allows eligible owners to deduct up to 20% of their qualified business income.7Internal Revenue Service. Qualified Business Income Deduction The One Big Beautiful Bill Act made this deduction permanent starting in 2026. If the company’s work looks like consulting or financial advisory services, though, it may be classified as a specified service trade or business, which phases the deduction out once taxable income exceeds roughly $203,000 (single) or $406,000 (married filing jointly) for 2026.
Whichever form you choose, the operating agreement or corporate charter should spell out what services the company provides, which entities it serves, and how it sets fees. That founding document is the first thing an auditor reads.
Setting Arm’s-Length Fees
Because the management company and the entities it serves are controlled by the same people, the IRS has broad authority to reallocate income and deductions between them when pricing doesn’t reflect economic reality.8Office of the Law Revision Counsel. 26 USC 482 – Allocation of Income and Deductions Among Taxpayers The standard is what an unrelated third-party management firm would charge for the same bundle of services.9eCFR. 26 CFR 1.482-1 – Allocation of Income and Deductions Among Taxpayers
Fees set too high artificially shift income into the management company to absorb deductions. Fees set too low suggest the entity isn’t a real business, and, as discussed below, can create gift tax problems. Benchmark fees against third-party family office providers, document the comparison, and refresh it periodically. Most family management companies use a flat monthly retainer per entity served, a percentage of assets under administration, or an hourly rate. Whichever method you pick, put it in a written service agreement, invoice consistently, and actually pay the invoices. A year-end journal entry accruing fees that never move is not a business.
Material Participation and Passive Activity Losses
Clearing the trade-or-business hurdle isn’t enough on its own. A taxpayer who does not materially participate in a trade or business cannot use its losses to offset wages, portfolio income, or income from other businesses where they do participate.10Office of the Law Revision Counsel. 26 USC 469 – Passive Activity Losses and Credits Limited Disallowed losses carry forward but stay frozen until you materially participate or dispose of the entire interest.
Material participation requires meeting one of seven IRS tests. The three that come up most often for family management companies:
- The 500-hour test: participation in the company’s operations for more than 500 hours during the year.
- The substantially-all test: your participation makes up substantially all of the participation by anyone, including non-owners.
- The 100-hour test: more than 100 hours of participation, and no other individual participates more than you do.
The 500-hour test is the most reliable path. Detailed time logs covering day-to-day management decisions, oversight calls, and service coordination give the IRS what it expects. Spousal participation generally counts toward the thresholds. Passive involvement — signing checks, reviewing quarterly reports, attending an annual meeting — is not enough. The agency wants regular, continuous, and substantial involvement in actual operations.
Deductible Expenses and the Mixed-Use Trap
Once the company passes the trade-or-business test, ordinary operating costs become deductible: staff salaries, office rent, technology, insurance, accounting and legal fees, and similar overhead.11eCFR. 26 CFR 1.162-1 – Business Expenses The trouble starts when the same resource serves business and personal purposes.
A family aircraft is the classic audit magnet. The IRS expects every flight to be categorized as business, personal, commuting, or entertainment, with logs supporting each classification. The agency has ramped up audits of business aircraft in recent years precisely because mixed-use assets in family structures are ripe for misallocation. Staff whose time is split between managing trust properties and running personal errands need similar time-based allocation, and the deduction goes only to the documented business share.
Expenses that are purely personal — maintaining a vacation home, provisioning a private yacht, family travel with no business purpose — are never deductible regardless of which entity writes the check. Internal controls need to catch these before they hit the books. Commingling personal expenses into the company’s accounts is the single fastest way to lose the entire business classification, not just the personal items.
The Net Investment Income Tax Advantage
High-income taxpayers pay a 3.8% surtax on net investment income once modified adjusted gross income exceeds $200,000 (single) or $250,000 (married filing jointly).12Internal Revenue Service. Topic No. 559 – Net Investment Income Tax Those thresholds have not been indexed since 2013, so more families cross them every year. Net investment income includes dividends, interest, capital gains, rents, and royalties. It generally does not include income from a trade or business in which the taxpayer materially participates.13Internal Revenue Service. Net Investment Income Tax
That creates another reason to get the classification right. Management-fee income flowing through a real business to an owner who materially participates avoids the surtax. Reclassified as passive or investment-related, the same income picks it up. For a family pulling $500,000 in management fees through the entity, the difference is $19,000 a year on top of losing the underlying deductions.
Below-Market Fees Can Create Gift Tax
When a management company provides real services to a family trust but charges fees well below market rates, or nothing at all, the IRS may treat the difference as a gift from the company’s owners to the trust beneficiaries. A gift is any transfer where the person making it does not receive full consideration in return.14Internal Revenue Service. Frequently Asked Questions on Gift Taxes Below-market services can fit the definition.
The annual gift tax exclusion is $19,000 per recipient for 2026, or $38,000 if spouses split the gift.15Internal Revenue Service. Gifts and Inheritances Foregone fees above those thresholds eat into the lifetime gift and estate tax exemption or trigger a current gift tax liability. The related rules on below-market loans between family members reinforce the principle that the IRS looks hard at any intra-family transaction where value moves without adequate payment.16Office of the Law Revision Counsel. 26 USC 7872 – Treatment of Loans With Below-Market Interest Rates Charging arm’s-length fees solves both problems at once. It supports profit motive for income tax and blocks a deemed gift for transfer tax.
The Personal Holding Company Trap (C Corporations Only)
If a family management company is organized as a C corporation, or is a corporation that has not elected S status, one more rule bites. Trip the personal holding company definition and undistributed income takes an additional 20% tax on top of the regular corporate rate.17Office of the Law Revision Counsel. 26 USC 541 – Imposition of Personal Holding Company Tax
Two tests must both be met. Stock ownership: at any time during the last half of the tax year, more than 50% of the corporation’s stock value is owned by five or fewer individuals. Family management companies are closely held almost by definition, so this test is essentially always satisfied.18Office of the Law Revision Counsel. 26 USC 542 – Definition of Personal Holding Company Income composition: at least 60% of adjusted ordinary gross income comes from personal holding company income — passive sources like dividends, interest, royalties, and annuities.19Office of the Law Revision Counsel. 26 USC 543 – Personal Holding Company Income
Active management fees stay outside personal holding company income, so the practical rule is that active fee revenue needs to account for more than 40% of adjusted ordinary gross income. Letting interest on idle cash or dividends from a house account push the passive share above 60% invites the penalty. Pass-through structures avoid this regime entirely.
Documentation That Survives an Audit
Every claim above depends on documentation. The IRS does not take your word that the company is a real business. It wants a paper trail. At a minimum:
- Signed written service agreements with every entity the company serves, specifying services, fee structure, and billing schedule, updated when the scope changes.
- Time records for all personnel, including family members in operational roles, logged by client entity and service type. “Administration — 8 hours” is nearly useless. “Reviewed and approved Q3 financial statements for Smith Family Trust — 2.5 hours” holds up.
- Actual invoices and payment records on a monthly or quarterly cycle. Year-end lump-sum adjustments look like numbers fabricated after the fact.
- Board minutes and meeting records for corporations; member-decision records for LLCs.
- Separate bank accounts, credit cards, and financial statements. One stray personal charge on a company account gives an auditor leverage to question the entire structure.
Mixed-use assets carry an even heavier documentation burden. For aircraft, flight logs should record date, destination, passengers, and business purpose for every trip. Similar standards apply to vehicles, office space, and staff time whenever personal use is possible.
What Reclassification Actually Costs
If the IRS concludes the company is not a legitimate trade or business, the consequences cascade. Every business deduction the company claimed gets disallowed and reclassified as non-deductible personal or investment spending. Management fees paid by family trusts and partnerships may be recharacterized, creating phantom income in some entities and lost deductions in others. In a pass-through, the additional tax lands directly on the owners’ returns.
Beyond the tax itself, the IRS adds an accuracy-related penalty of 20% on the portion of the underpayment attributable to negligence or a substantial understatement of income.20Internal Revenue Service. Accuracy-Related Penalty Interest accrues on both the tax and the penalty from the original due date. Across several open years and hundreds of thousands in disallowed deductions, the combined bill can be staggering.
The IRS generally has three years from the filing date to audit a return, but the window extends to six years if gross income is understated by more than 25%. A reclassification that knocks out large deductions can push the understatement past that threshold, pulling older years back into scope. The documentation and operational discipline described above will not guarantee that the IRS agrees with your position, but they raise the cost of challenging it enough that the agency is likelier to spend its time elsewhere.