Self-Directed IRAs: Rules, Prohibited Transactions, and Alternative Assets

A Retirement Account That Buys Real Estate

The Tax Reform Act of 1974, which created the IRA, did not restrict what IRAs could hold—it restricted who could benefit from IRA assets. Almost any investment is permissible inside an IRA except for collectibles (under IRC §408(m)) and life insurance. That legal breadth created the self-directed IRA, a vehicle that allows retirement funds to flow into real estate, private lending, startups, farmland, cryptocurrency, and dozens of other asset classes unavailable through conventional brokerages.

The SDIRA market holds an estimated $50 billion in assets, according to the Retirement Industry Trust Association, a fraction of the $13+ trillion total IRA market but one that has grown steadily as investors seek returns uncorrelated with public equity markets. The core mechanics are identical to a conventional IRA—tax-deferred growth in a traditional SDIRA, tax-free growth in a Roth SDIRA—but the investment universe is dramatically broader and the compliance requirements dramatically stricter.

The Custodian Requirement

Every IRA must be held by a qualified trustee or custodian: a bank, federally insured credit union, savings and loan association, or an entity specifically approved by the IRS under IRC §408(a)(2). Conventional brokerages like Fidelity or Vanguard restrict allowable investments to the assets they offer. SDIRA custodians—Equity Trust, Midland IRA, Alto, and others—accept alternative assets but typically offer no investment advice or due diligence on the underlying assets.

SDIRA custodians perform administrative functions only: holding title to assets in the IRA's name, processing transactions, filing required IRS reports (Form 5498, Form 1099-R), and ensuring custody of the account. The investment decision-making falls entirely on the account holder. This administrative-only role is why thorough investor due diligence is non-negotiable.

Prohibited Transactions: The Hard Lines

IRC §4975 defines prohibited transactions—dealings between the IRA and "disqualified persons" that immediately destroy the tax-advantaged status of the entire account. The consequences of a prohibited transaction are catastrophic: the IRA is treated as having distributed its entire value on January 1 of the year the transaction occurred, triggering ordinary income tax on the full balance plus a 15% excise tax, and a potential 100% excise tax if not corrected.

Prohibited transactions include:

• Selling, exchanging, or leasing property between the IRA and a disqualified person
• Lending money or extending credit between the IRA and a disqualified person
• Furnishing goods, services, or facilities between the IRA and a disqualified person
• Transfer to or use of IRA assets by or for the benefit of a disqualified person
• A fiduciary's act of dealing with IRA assets in their own interest

Disqualified Persons

The definition of disqualified persons is broad under IRC §4975(e)(2):

• The IRA owner (the account holder)
• The IRA owner's spouse
• Lineal ancestors and descendants of the IRA owner (parents, grandparents, children, grandchildren)
• Spouses of those lineal descendants
• Any fiduciary of the IRA
• Any person providing services to the IRA
• Any corporation, partnership, trust, or estate in which disqualified persons own 50% or more

Siblings, cousins, friends, and unrelated business partners are not disqualified persons. An SDIRA can lend money to an unrelated business partner's company. It cannot lend money to the account holder's brother-in-law's company if the account holder's child is married to that individual.

Allowable and Prohibited Asset Classes

UBIT: The Tax That Catches Investors Off Guard

Tax-exempt accounts like IRAs are subject to Unrelated Business Income Tax (UBIT) when they receive income from an active trade or business or from debt-financed property. UBIT rates mirror corporate tax rates, currently 21% plus state taxes in some jurisdictions.

Two common SDIRA strategies trigger UBIT. First, investing in a partnership that operates an active business—a car wash, restaurant franchise, or operating LLC—generates Unrelated Business Taxable Income (UBTI) passed through to the IRA. Second, using a non-recourse mortgage to finance real estate inside an SDIRA creates Unrelated Debt-Financed Income (UDFI). The taxable portion of property income and gain equals the percentage of the property's purchase price financed by debt.

An SDIRA that owns real estate financed 50% by a non-recourse loan will have 50% of its net rental income and 50% of any capital gain at sale subject to UBIT. The IRA files Form 990-T and pays the tax from IRA assets. Many investors are unaware of this obligation until they sell a leveraged property and receive an unexpected tax bill from inside what they assumed was a tax-free account.

The Checkbook IRA Structure

The checkbook IRA (also called an IRA LLC) involves the SDIRA holding 100% of the membership interests of an LLC, with the IRA owner serving as the LLC's manager. The LLC has its own bank account, and the manager-owner writes checks directly for investments without waiting for custodian processing. The structure is legal under the right conditions and was validated in Swanson v. Commissioner (1996).

The risks are significant. The IRA owner who also manages the LLC walks a narrow line—acting in the interest of the LLC that benefits the IRA is permissible; using the LLC's assets for personal benefit is a prohibited transaction. The IRS has scrutinized checkbook IRA structures intensively, and the failure to maintain absolute separation between personal and LLC/IRA assets has destroyed accounts in numerous audits and Tax Court cases.

This article is for informational purposes only and does not constitute tax, legal, or investment advice. Self-directed IRA rules are complex, and violations can result in severe tax consequences. Consult a qualified tax attorney and SDIRA specialist before investing.