Most retirement savers know their IRA or 401(k) can hold stocks, bonds, and mutual funds. Far fewer know that a specific type of account — the self-directed retirement account — can also hold assets like commercial real estate (CRE) and private credit. As more accredited investors look to diversify beyond public markets, understanding how these accounts work has become a genuinely useful piece of financial literacy.
This article is an educational overview of the category. It is not tax, legal, or investment advice. The rules governing self-directed retirement accounts are detailed and unforgiving, and the right move for any individual depends entirely on their own circumstances. Anyone considering this path should work with a qualified custodian, a CPA, and, where appropriate, an ERISA or tax attorney before acting.
What “self-directed” actually means
A self-directed IRA (SDIRA) or self-directed Solo 401(k) is not a different tax structure than a conventional IRA or 401(k). It receives the same tax treatment. The difference is what the account is permitted to hold and who administers it.
A conventional IRA at a mainstream brokerage typically limits you to publicly traded securities. A self-directed account, held with a specialized custodian, can hold a much broader universe of assets — including real estate, private company shares, promissory notes, and private credit instruments. The “self-directed” label refers to the fact that the account holder chooses these alternative investments directly, rather than picking from a brokerage’s menu.
The key players are worth distinguishing:
- The custodian or administrator holds the account, executes transactions at your direction, and handles IRS reporting. Custodians do not give investment advice and do not vet whether an investment is a good idea.
- The account holder identifies and directs the investments.
- The IRS, through the tax code, defines what is and isn’t allowed — and the penalties for getting it wrong.
Why some investors look at CRE and private credit inside retirement accounts
The appeal is usually diversification and the tax wrapper. Commercial real estate and private credit have return profiles that don’t always move in step with public equities, and holding them inside a tax-advantaged account means income and gains can compound without annual taxation (in a traditional account) or potentially come out tax-free (in a Roth).
Private credit — loans and debt participations made to businesses or real estate projects — is often income-oriented. For an investor whose goal is durable cash flow rather than public-market appreciation, the idea of housing that income stream inside a tax-deferred or tax-free account is understandably attractive.
That said, the tax wrapper is not free of complications, and the illiquidity of these assets matters a great deal in a retirement context. Which brings us to the rules.
The rules that make or break a self-directed strategy
This is the part that deserves the most attention, because the mistakes here are expensive and often irreversible.
Prohibited transactions and disqualified persons
The IRS prohibits an IRA from transacting with “disqualified persons” — a category that includes you, your spouse, your lineal ascendants and descendants, and entities they control. In practical terms, your retirement account generally cannot buy a property you already own, lend to your own business, or benefit you personally in the present. The account must operate at arm’s length, for the exclusive benefit of your future retirement.
A prohibited transaction can disqualify the entire IRA, triggering immediate taxation as if the whole account had been distributed — a catastrophic outcome. This is not a rule to interpret casually or on your own.
No personal use or “self-dealing”
If your SDIRA owns a commercial property, you cannot use it, manage it for personal compensation, or have family members occupy it. Expenses must be paid from the account, and income must return to the account. The wall between your personal finances and the account’s assets has to stay intact.
UBIT and UDFI
Two acronyms surprise many first-time self-directed investors:
- UBIT (Unrelated Business Income Tax) can apply when a retirement account earns income from an active trade or business rather than passive investment.
- UDFI (Unrelated Debt-Financed Income) can apply when the account uses leverage — for example, when real estate inside the IRA is purchased with a mortgage. The portion of income attributable to the borrowed money may be taxable even inside the retirement account.
These don’t necessarily disqualify a strategy, but they can meaningfully change the after-tax math, and they’re easy to overlook. A CPA familiar with self-directed accounts should model them before you commit.
Liquidity and valuation
Retirement accounts eventually require distributions. Traditional IRAs are subject to required minimum distributions (RMDs) beginning at the age set by current law. If most of your account is tied up in an illiquid CRE or private-credit position, meeting an RMD in cash can be difficult. Illiquid assets also need an annual fair-market valuation for reporting, which adds administrative work and cost.
How the mechanics typically work
While every custodian differs, the general flow looks like this:
- Open a self-directed account with a custodian that supports alternative assets, and fund it via contribution, transfer, or rollover from an existing retirement account.
- Identify an eligible investment. For a private-credit or CRE participation, this means confirming the offering can be held in a retirement account and gathering the subscription documents.
- Direct the custodian to make the investment. The custodian — not you personally — is the party that funds it, using account assets, and title is held in the name of the account.
- Keep all income and expenses inside the account. Distributions, interest, or rental income flow back to the custodian; any expenses are paid from account funds.
- Maintain valuations and reporting as the custodian requires, and plan ahead for eventual distributions.
The theme throughout is separation: the account acts on its own behalf, through the custodian, for your future benefit — never for your present convenience.
Questions worth asking before you start
If you’re exploring this, a productive first conversation with your advisors might cover:
- Does using retirement funds fit my broader liquidity picture, given that these assets are hard to sell quickly?
- Would UBIT or UDFI apply to the specific investment I’m considering, and how would that affect returns?
- How will I meet required distributions if a large share of the account is illiquid?
- Is a traditional or Roth structure more appropriate for the income profile of this asset?
- Is the custodian reputable, and do they have real experience administering this asset type?
None of these have universal answers. They depend on your income, age, tax situation, and goals — which is exactly why professional guidance matters here more than in ordinary brokerage investing.
The bottom line
Self-directed retirement accounts open the door to holding commercial real estate and private credit inside a tax-advantaged wrapper, and for the right investor that can be a meaningful diversification tool. But the category rewards diligence and punishes shortcuts. The prohibited-transaction rules, the UBIT/UDFI considerations, and the liquidity constraints are all reasons to move deliberately and with qualified help.
The goal of this piece is simply to make the landscape legible. If it’s prompted questions, the right next step isn’t a quick decision — it’s a conversation with a custodian and a tax professional who can look at your specific situation.
This article is provided for educational purposes only and does not constitute tax, legal, accounting, or investment advice. Crowdlender AI is not a registered broker-dealer, investment adviser, tax adviser, or law firm. Rules governing retirement accounts are complex and subject to change. Consult your own qualified custodian, CPA, and legal counsel before making any decision regarding self-directed retirement investing. Investments in private credit and commercial real estate involve risk, including the possible loss of principal, and are illiquid.