Private Foundations: What Family Control Really Costs

How it works

Every organization recognized under Section 501(c)(3) starts out as a private foundation. Section 509(a) defines the term by exclusion: an organization is a private foundation unless it affirmatively qualifies under one of four public-charity tests, broad public support, a gross-receipts or fee-for-service support standard, functioning as a supporting organization, or testing for public safety. There is no separate filing that makes an organization "a private foundation." Failing all four tests is what does it.

Section 508(b) writes the same default into the notice process: every 501(c)(3) organization is presumed to be a private foundation unless it gives the IRS notice, on Form 1023, that it meets one of the 509(a) exceptions. A donor who wants a public-charity vehicle has to prove it; a donor who wants a family-controlled grantmaking vehicle just lets the default stand.

What the donor is actually choosing is total, indefinite control, board composition, investment policy, which charities get funded, even paying family members, in exchange for a permanent excise-tax regime under Chapter 42 of the Code that exists because Congress does not trust an insider-controlled charity to police itself. A donor-advised fund sidesteps nearly all of that by handing legal control to a public-charity sponsor and keeping only advisory privileges. Funding an asset into a foundation is an irrevocable, completed gift: the same completed-gift, loss-of-control mechanics that underlie funding an irrevocable trust apply here, and once the asset is in, control runs through a board seat, not personal ownership.

What this is worth in Florida

Less than the entity's name suggests, and I would rather say so plainly. Florida has no individual income tax and no state estate or inheritance tax, so the entire private-foundation-versus-donor-advised-fund analysis is federal from the first dollar. A Florida-formed foundation still owes the full federal excise-tax regime described below, with no state-level relief. The Florida angle is mechanical: formation runs through Florida's nonprofit-corporation statute if the foundation is a corporation, or through Florida trust law if it is a trust.

Who this applies to

There is no income floor written into the Code. Anyone can form and fund a private foundation; the real constraint is whether the excise-tax and compliance load is worth carrying relative to a donor-advised fund. Separate accounting, a Form 990-PF and Form 4720 filing regime, and self-dealing legal review only amortize well at meaningful funding levels, which is why practitioners commonly look for multi-million-dollar funding before recommending a standalone foundation, though that is a judgment call, not a statutory floor.

• The asset matters more than the income. Cash and publicly traded stock fund a private foundation efficiently. Closely held business stock, real estate, or other illiquid property fund it badly: the deduction is limited to basis, and the excess-business-holdings excise tax actively punishes the fact pattern most business-owner clients bring to this conversation, a large block of the family company.
• Family involvement changes the analysis. A donor who wants to employ children, pay a spouse a foundation salary, or lease space to the foundation needs a narrow reasonable-and-necessary-compensation exception to work cleanly. It does work, but it is a standard that gets audited, not a blank check.
• Who counts as family is narrower than people assume. A disqualified person includes substantial contributors, foundation managers, more-than-20%-owners of an entity that is itself a substantial contributor, and members of the donor's family, defined as a spouse, ancestors, children, grandchildren, great-grandchildren, and the spouses of the last three. Siblings, nieces, nephews, and cousins are not family members under that definition and are not disqualified persons purely by blood, though they could still be swept in as a foundation manager or a 20%-plus owner under a different prong.

What it requires

Getting recognized

A private foundation can be organized as a nonprofit corporation, an LLC, an unincorporated association, or a trust; the Form 1023 instructions accept all four. Exemption is requested on Form 1023 (the abbreviated 1023-EZ is not built for a foundation funded with anything beyond the simplest facts), filed with a $600 fee through Pay.gov.

Timing the filing matters more than most new organizations realize. The Section 508(a) notice is due within 15 months of the end of the month of formation, extended automatically to 27 months, for exemption to relate back to the formation date. File later, and exemption runs only from the filing date forward, so gifts made before a late filing may not be deductible at all.

What it can be funded with

The asset contributed decides the deduction. Cash is deductible up to 30% of adjusted gross income, with a five-year carryforward; a public charity or donor-advised fund gets a 60% ceiling on the same gift. Publicly traded stock, meaning stock with a readily available market quotation, can be deducted at fair market value under the "qualified appreciated stock" rule, capped at 10% of the corporation's outstanding stock per donor, family-aggregated, against a 20%-of-AGI ceiling as capital-gain property.

Closely held stock, real estate, or other property with no public market falls outside that exception entirely, and this is the single biggest planning trap in the strategy: the deduction is forced down to basis, not fair market value, so the entire built-in gain produces no benefit. A narrow set of foundations escapes this, operating foundations, foundations that pass through 100% of contributions within two and a half months, and certain pooled common-fund foundations, but an ordinary family grantmaking foundation gets none of it. A separate floor equal to 0.5% of adjusted gross income narrows every donor's aggregate deduction regardless of vehicle, and a companion rule compresses what survives for a donor in the top bracket. Both come from the same 2025 law. Neither changes the foundation-versus-fund comparison.

Running it, every year

Once funded, a private foundation carries a permanent five-part excise-tax regime under Chapter 42 of the Code, self-dealing, a minimum-distribution requirement, excess business holdings, jeopardizing investments, and taxable expenditures, plus a flat annual tax on its investment income that a donor-advised fund's sponsor never pays. Unless noted below, the tax falls on the foundation itself; self-dealing instead falls on the disqualified person who dealt, and three of the five also reach a manager who knowingly took part.

Stock received by gift or bequest gets a five-year window to bring an excess holding down to the permitted line, extendable another five years on a diligence-and-plan showing; stock the foundation buys outright gets none at all. Every foundation files Form 990-PF annually regardless of size, due the 15th day of the fifth month after year-end, where the net-investment-income tax is reported. The other five excise taxes go on Form 4720 instead.

What you need to document

Substantiation decides whether a position here survives examination, and the file matters as much as the transaction itself.

The job description, before the paycheck

A family member's pay only survives self-dealing scrutiny if the personal-services exception applies, and its own examples are professional and managerial: legal work, investment management, general banking. Maintenance, janitorial, and security work do not qualify no matter the pay, and similarly unskilled work likely does not either, so the actual duties need to be settled and documented before any compensation question is reached.

An independent reasonable-compensation study

Once the job description clears that threshold, the pay itself is tested against the ordinary reasonable-compensation standard: documented duties, hours, and a market comparison. Form 990-PF's compensation schedule for officers, directors, and trustees is a public record that nonprofit-transparency sites republish, so an undocumented family salary is visible to anyone, not just an examiner.

A qualified appraisal and Form 8283

A gift of closely held stock or real estate needs a qualified appraisal once its value exceeds $5,000, attached to the donor's return on Form 8283, Section B. Missing it jeopardizes the deduction entirely, on top of the basis limitation.

A dated letter of intent that is not a signed sale

A pre-liquidity stock gift has to happen before any binding sale agreement exists, to avoid the gain being attributed back to the donor under the prearranged-sale and assignment-of-income doctrines. The paper trail showing the gift came first is what supports that ordering later.

An annual minimum-distribution worksheet

The 5%-of-assets calculation belongs in the annual close, not something discovered at Form 990-PF preparation time. Several years without running it can accumulate a large excise liability, since a shortfall is taxed at 30% initially and 100% if it stays uncorrected.

Where it goes wrong

A properly run private foundation is not a listed or abusive transaction. It is a mainstream, IRS-recognized structure that thousands of families use. What actually goes wrong here comes from two features of the regime itself: self-dealing is strict liability, and excess business holdings is pure percentage math that does not care about intent.

What the Tax Court did in Madden

Madden v. Commissioner, T.C. Memo. 1997-395, shows the exception failing before compensation is even reasonable. A disqualified person's company was paid for maintenance, janitorial, and security work, and the Tax Court read "personal services" narrowly: the regulation's own examples, legal, investment management, and general banking, are professional and managerial, so support-staff work does not qualify at all, regardless of whether the pay was reasonable. Any exception to a strict-liability rule is construed narrowly, the court reasoned, since letting an activity where capital is not a major factor count as a personal service would swallow the separate, unexcepted ban on a disqualified person furnishing goods or services to the foundation. Get the job description right before the pay question is reached: professional and managerial work fits the exception; support-staff work, by the same logic, likely does not.

The recurring mistakes

• Self-dealing is the most common and least forgivable failure in this regime. Structuring a family transaction as a loan, a lease, or a reimbursement outside the narrow compensation exception draws the excise regardless of actual harm, because self-dealing is strict liability, not a facts-and-circumstances test.
• Funding with a large block of the family company without modeling the disposal clock first. This is the failure mode that most often surprises a business owner, since the trigger is pure percentage math with no intent requirement.
• Treating a foundation like a donor-advised fund for pre-liquidity stock. Expecting a fair-market-value deduction and getting only basis is the trap the funding rules above exist to prevent.
• Missing the 27-month notice window. The organization survives; the retroactive exemption on early gifts does not.
• Ignoring the minimum-distribution calculation until filing season. The two-tier 30%/100% structure lets a shortfall compound for years before anyone catches it.
• Putting a family member on payroll for support work rather than professional work. Madden denied the exception on the job description alone, before pay was ever examined.

A situation where this comes up

The version I see most often is a business owner heading toward a sale who has heard, somewhere, that gifting stock to a foundation before closing is a clean way to avoid the gain. The instinct about timing is correct. The instinct about which vehicle to use often is not.

What usually has to change is the choice of vehicle once the basis limitation is on the table. The same pre-closing gift, made to a donor-advised fund instead, keeps the same personal capital-gains avoidance and gets a full fair-market-value deduction rather than one capped at basis, with none of the excess-business-holdings clock or the annual excise-tax filing afterward. The gap narrows a great deal if the foundation is instead funded with cash or a modest block of publicly traded stock, since neither runs into the basis trap.

The version that worries me is the one where indefinite family control is the actual goal, and the owner wants to put a spouse or a child on the foundation's payroll without wanting to run the compliance discipline that comes with it. That is where a reasonable ambition, keeping the giving in the family's hands, turns into a self-dealing exposure that had nothing to do with how much anyone was paid.