Imagine paying yourself a modest $9,754 salary from a business your IRA owns — a sum that looks unremarkable on a W-2 — and then discovering, six years later, that the IRS has reclassified the entire account as a taxable distribution, eliminated the tax-deferred status retroactive to January 1, and tacked on penalties. That is exactly what happened to Mr. Ellis in Ellis v. Commissioner, and it is the kind of mistake Section 4975 of the Internal Revenue Code was written to punish.
Self-directed IRAs and Solo 401(k)s offer remarkable flexibility — real estate, private notes, LLCs, precious metals, and even cryptocurrency. But that flexibility is bounded by a tight, unforgiving set of rules: the prohibited transaction rules. Cross the line, even unintentionally, and the consequences range from a 15 percent excise tax to the catastrophic loss of the entire account's tax-favored status.
This guide breaks down who counts as a disqualified person, what transactions are forbidden, how the penalties cascade, and the practical patterns that quietly turn legitimate investments into compliance disasters.
Why Section 4975 Exists
Congress created Section 4975 to prevent retirement plans — funds that grow tax-deferred or tax-free with public subsidy — from being used as personal piggy banks. The basic policy is simple: your IRA exists for your retirement, not for your present-day convenience, your spouse's business, or your children's college fund. Anything that lets you (or anyone close to you) extract current benefit from plan assets is suspect.
The statute does not just punish obvious self-dealing. It reaches indirect benefits, related-party transactions, personal guarantees, and even arms-length-looking deals that happen to involve someone within the prohibited circle.
Who Is a Disqualified Person?
Section 4975(e)(2) defines the protected boundary around your plan. A disqualified person includes:
- The plan fiduciary — which, in a self-directed IRA or Solo 401(k), is almost always you, the account owner, because you direct the investments.
- Service providers to the plan — custodians, administrators, attorneys, and accountants paid to work on the plan.
- Your family in the vertical line: your spouse, ancestors (parents, grandparents), lineal descendants (children, grandchildren), and the spouses of those descendants.
- Entities you control — a corporation, partnership, trust, or estate where disqualified persons (in aggregate) own 50 percent or more by value, profits, or beneficial interest.
- Officers, directors, 10 percent shareholders, or highly compensated employees of controlled entities.
Notice who is conspicuously missing from the list: siblings, cousins, aunts, uncles, and in-laws (other than a spouse). Brothers and sisters are not disqualified persons under Section 4975. A transaction between your IRA and your brother is generally permitted; one between your IRA and your father is not.
This gap is a frequent source of both legitimate planning opportunities and dangerous misconceptions. Family attribution under Section 4975 is narrower than under many other Code provisions, and you should never assume that a "related" person is automatically disqualified — or that they are automatically safe.
The Six Categories of Prohibited Transactions
Section 4975(c)(1) lists six categories of forbidden dealings between a plan and a disqualified person:
- Sale, exchange, or leasing of property. Selling personal land to your IRA, or leasing IRA-owned office space to your wholly owned LLC, both fall here.
- Lending money or extending credit. This is broader than it sounds. Personal guarantees on a non-recourse loan to your IRA count as an indirect extension of credit (see Peek v. Commissioner below).
- Furnishing goods, services, or facilities. Doing repair work yourself on an IRA-owned rental — even for free — is providing services to the plan.
- Transferring plan income or assets to, or use by, a disqualified person. Staying one weekend in an IRA-owned vacation home, or storing IRA-owned gold in your home safe, both fit.
- Fiduciary self-dealing. A fiduciary cannot use plan assets in their own interest or for their own account.
- Kickbacks. A fiduciary cannot receive personal consideration from any party doing business with the plan.
Each of these is independent. A single transaction can — and often does — trigger more than one prohibited category at once.
Two Cases Every Self-Directed Investor Should Know
Peek v. Commissioner (140 T.C. 12, 2013)
Two friends, Lawrence Peek and Darrell Fleck, used Roth IRAs to acquire a fire-protection business. The IRAs put down cash; the seller financed the rest. To make the deal happen, Peek and Fleck personally guaranteed the seller note and pledged their homes as collateral.
The Tax Court held that the personal guarantee was an indirect extension of credit from a disqualified person (each owner) to his own IRA — a prohibited transaction. Because the guarantee remained in place for years, the IRA lost its qualified status all the way back to the year of the guarantee, and the gains on the eventual business sale became fully taxable.
The lesson is brutal: even when the underlying deal is between your IRA and an unrelated third party, your signature on a guarantee can disqualify the account.
Ellis v. Commissioner
Terry Ellis formed an LLC called CST Investments to run a used car dealership. His self-directed IRA was a member; an unrelated individual held the rest. Ellis worked as general manager and paid himself modest wages from the LLC.
The Eighth Circuit affirmed the Tax Court: a fiduciary cannot draw compensation from an entity owned in significant part by his own IRA. The salary was an act of self-dealing under Section 4975(c)(1)(E). The IRA was deemed distributed.
The lesson is equally pointed: if your IRA owns an operating business through an LLC, you cannot work for the business and be paid, no matter how reasonable the compensation.
The Tax Penalties
The penalty structure has two stages, and they can stack with devastating speed.
Stage One: The 15 Percent Excise Tax
Under Section 4975(a), the initial penalty is 15 percent of the amount involved in the prohibited transaction, imposed on the disqualified person who participated. The tax is annual — it applies for each year during the taxable period that the transaction remains uncorrected. A four-year-old uncorrected lease can rack up four separate 15 percent assessments.
The "amount involved" is generally the greater of consideration paid or fair market value of what was exchanged. For loans and leases, it is the amount of compensation that would have been paid in an arm's-length transaction.
Stage Two: The 100 Percent Tax
If the transaction is not corrected within the taxable period (broadly, before the deficiency notice is mailed), Section 4975(b) layers on an additional 100 percent of the amount involved. The combined federal tax now exceeds the entire transaction value, before counting any state piggyback or income tax on the deemed distribution.
The Nuclear Option for IRAs
Here is where Section 4975 becomes uniquely terrifying for IRA owners. Under Section 408(e)(2), if an IRA owner or beneficiary engages in a prohibited transaction, the account ceases to be an IRA as of the first day of that taxable year. The full fair market value of every asset in the IRA is treated as distributed on January 1.
That deemed distribution is taxable income — and if you are under 59½, it carries an additional 10 percent early-withdrawal penalty under Section 72(t). For a $500,000 self-directed IRA holding a few rental properties, a single $50,000 mistake can detonate tax on the entire half-million-dollar balance.
Solo 401(k)s: Similar Rules, Different Consequences
Solo 401(k)s are also subject to Section 4975, but they enjoy one critical structural advantage: the "deemed distribution of the entire account" rule of Section 408(e)(2) is an IRA-specific provision. It does not apply to qualified plans.
In a Solo 401(k), a prohibited transaction generally results in the 15 percent excise tax (and the 100 percent escalation if uncorrected) on the specific transaction. The rest of the plan keeps its qualified status. If you can unwind the transaction and put the plan back in the position it would have been in, you may avoid the larger 100 percent tax altogether.
This difference is not just academic. For high-value retirement assets directed into real estate or private equity, the choice between a Solo 401(k) and a self-directed IRA can be the difference between a contained, fixable mistake and the loss of a lifetime of retirement savings.
Where Self-Directed Investors Slip Up Most Often
Across IRS guidance, case law, and practitioner war stories, the same patterns appear over and over.
Personal use of IRA real estate. Staying even one night in an IRA-owned vacation home — yours, your child's, or your parents' — is a prohibited transaction. The asset must be held strictly for investment.
Doing your own repairs. Painting, fixing a roof, cutting the grass on an IRA-owned rental are all services furnished to the plan. Hire and pay an unrelated contractor from IRA funds.
Family transactions. Renting an IRA-owned condo to your daughter, or buying property from your father, are textbook violations. Renting to a niece or nephew, however, is generally fine.
Sweetheart loans. Loaning IRA money to your spouse, or having your spouse co-sign on IRA-related debt, are extensions of credit. Even loans on what would otherwise be commercial terms are prohibited if a disqualified person is on the other side.
Personal guarantees. As Peek shows, signing personally for a loan into your IRA is itself the prohibited transaction.
Working for an IRA-owned business. As Ellis shows, drawing salary from an entity in which your IRA holds an interest is self-dealing, regardless of how reasonable the wage.
Storing IRA collectibles at home. Home storage of IRA-owned precious metals has been repeatedly challenged. Use a qualified depository.
Commingling. Mixing personal funds with IRA funds — even briefly — to "make a deal close" violates the prohibition on extending credit. Every dollar in and out of the investment must move directly through the custodian.
Statutory Exemptions
Section 4975(d) carves out a handful of transactions that would otherwise be prohibited, including:
- Participant loans from qualified plans meeting Section 72(p) criteria (not available for IRAs).
- Reasonable compensation paid to disqualified persons for necessary plan services.
- Certain ESOP loans.
- Block trades and electronic-system transactions meeting Department of Labor conditions.
- Investment advice under eligible arrangements.
Some of these have been expanded through DOL prohibited transaction exemptions (PTEs), particularly around investment advice. None of them rescue the typical self-directed IRA mistakes above.
How to Stay Compliant
A few habits dramatically reduce the risk of an inadvertent violation:
- Map your circle of disqualified persons before any transaction. Write the list down. Update it when someone marries into the family.
- Use a qualified custodian for every dollar. The custodian's processes are an audit trail and a sanity check.
- Document arm's-length dealings. Independent appraisals, market-rent surveys, written leases, and arms-length pricing memos make defending a transaction far easier.
- Never sign personally for debt that touches the plan. Use non-recourse loans from arm's-length lenders.
- Pay all expenses from the plan, not from personal accounts, even with intent to reimburse.
- Get a written opinion from a qualified ERISA attorney before any unusual transaction — particularly anything involving family, controlled entities, or operating businesses.
- Reconcile annually. Pull the custodian statements, list each asset and counterparty, and ask whether anything has drifted toward disqualified-person territory in the past year.
Why Clean Records Matter Even More Here
Section 4975 cases are won and lost on documentation. Whether a transaction was arm's length, what the fair market value of an asset was on a given date, who paid what to whom, when a guarantee was signed — all of these turn on records, not memory.
Retirement plan assets often sit outside the bookkeeping system that tracks the rest of your finances, which is precisely how problems compound for years before anyone notices. Maintaining a clear, dated ledger of every contribution, distribution, investment, expense, and counterparty associated with the plan is the single most effective defense against an inadvertent violation. If a question ever arises, you want to be able to reconstruct the history of the account on a single page.
Keep Your Retirement Records Audit-Ready
Self-directed retirement plans give you control — and that control comes with an obligation to keep records the way a fiduciary would. Beancount.io provides plain-text accounting that is transparent, version-controlled, and AI-ready, so every transaction in your plan has a permanent, queryable trail. Get started for free and bring the same discipline to your retirement assets that you bring to the rest of your books.