More of my clients than ever are using a Self-Directed IRA to invest in private funds, and I understand why. Private equity, private credit, venture capital, and real estate funds offer access to opportunities most retirement savers never see. But the fund’s structure, not just its returns, decides how much of that growth your IRA actually keeps. Invest in the wrong structure and your “tax-free” or “tax-deferred” account can owe tax at trust rates every year. Invest in the right one and you may never see a tax bill inside the IRA at all.

Why Invest in Private Funds With a Self-Directed IRA?

A traditional brokerage IRA at Fidelity, Schwab, or Vanguard generally won’t let you invest directly in a private equity or private credit fund. A Self-Directed IRA can. The tax code doesn’t limit IRAs to publicly traded securities. It mainly spells out what’s prohibited, so a Self-Directed IRA can subscribe to a limited partnership or LLC interest in a private fund just like any other investor.

Private funds and retirement accounts are a natural fit. Most private funds lock up capital for five to ten years, and retirement money is already meant to stay invested for decades. Holding a fund in an IRA means distributions and gains stay inside the account, growing tax-deferred in a traditional IRA or tax-free in a Roth. That’s a meaningful advantage over owning the same fund in a taxable account, where you’d receive a K-1 and pay tax every year. The catch is that IRAs aren’t completely immune to tax, and private funds are the most common way IRA investors run into it.

How Private Funds Create UBTI in a Self-Directed IRA

Congress created the unrelated business income tax, or UBIT, so tax-exempt investors couldn’t run businesses tax-free and undercut taxable competitors. Because an IRA is a tax-exempt trust, the rule applies to it too. The good news is that most passive investment income is excluded. Interest, dividends, royalties, rents from real property, and capital gains generally aren’t UBTI. That’s why a Self-Directed IRA that buys a rental property for cash or lends money on a promissory note usually owes nothing.

Private funds get tricky because most are organized as limited partnerships or LLCs taxed as partnerships. A partnership doesn’t pay tax itself. It passes each item of income through to its investors, and the income keeps its character. If the fund earns its money from an operating business, your IRA’s share of that income is treated as if the IRA ran the business directly. There are two main ways this happens.

Operating business income. A private equity fund that owns a restaurant chain, a manufacturer, or a software company through pass-through entities will allocate trade or business income to its investors. Your IRA’s share is UBTI. The same goes for many energy, infrastructure, and operating real estate funds, such as hotels or senior housing with substantial services.

Debt-financed income. When a fund borrows to buy property, the portion of income and gain attributable to the debt is unrelated debt-financed income, or UDFI. A real estate fund that buys an apartment complex with 60% leverage could generate UDFI on roughly 60% of its net rental income and a similar share of the gain when it sells. Fund-level credit lines and subscription facilities can create UDFI too, depending on how they’re used.

You’ll find your IRA’s share of UBTI on the fund’s Schedule K-1, generally in Box 20 with Code V. I explain how to read it in Identifying UBTI for a Self-Directed IRA on Form K-1.

Which Private Funds Are Most Likely to Trigger UBTI?

No two funds are alike, and the offering documents always control, but in my experience the risk generally breaks down like this:

Fund type	Typical income	UBTI risk for an IRA	What to ask the sponsor
Private credit or direct lending fund	Interest on loans	Generally low, unless the fund borrows to make loans or earns fee income from originating them	Does the fund use leverage, and is there a blocker or offshore feeder?
Venture capital fund	Capital gains on startup shares held as C corporations	Generally low, since portfolio companies are usually corporations	Does the fund hold any LLCs or use a credit facility?
Private equity buyout fund	Gains and income from operating companies	Moderate to high if portfolio companies are pass-through entities or deals are financed at the fund level	Is there a corporate blocker for tax-exempt investors?
Unleveraged real estate fund	Rent and gains from real property	Generally low	Will the fund ever use mortgage debt or provide significant services to tenants?
Leveraged real estate fund	Rent and gains from mortgaged property	High, as UDFI on the debt-financed share	What’s the target leverage, and is a REIT or blocker structure available?
Energy, infrastructure, or operating real estate fund	Operating business income	High	Can tax-exempt investors invest through a blocker?

The most useful thing you can do is ask before you invest. Most institutional sponsors raise money from pension funds and endowments, which face the same UBTI rules, so they’re used to these questions and often have a structure built for tax-exempt investors.

How to Avoid Unnecessary Taxes on Private Fund Investments

You don’t need to avoid private funds because of UBTI. You need to pick the right structure, and these are the strategies I see work best.

Invest through a blocker corporation

Many funds offer tax-exempt investors a parallel vehicle or feeder fund that invests through a corporation, often called a blocker. The corporation pays corporate income tax, currently 21%, on the operating or debt-financed income, then pays dividends to your IRA. Dividends aren’t UBTI, so the IRA has nothing to report. A blocker doesn’t eliminate tax. It swaps trust tax rates and a Form 990-T for a flat corporate rate paid at the fund level. For funds with heavy operating income, that trade is often worth it. For funds that would generate little UBTI anyway, the corporate tax can cost more than it saves, so run the numbers. I cover this and a few other approaches in Secret Ways to Eliminate UBIT for Your Self-Directed IRA Investment.

Favor unleveraged or low-leverage funds

If you want real estate exposure in an IRA, an all-cash or low-leverage fund keeps rental income and gains largely free of UDFI. Some sponsors also offer access through a private REIT, which pays dividends rather than passing through rental income and debt.

Consider a Solo 401(k) for leveraged real estate

This is the planning point I wish more investors knew. Under Internal Revenue Code Section 514(c)(9), qualified retirement plans, including a Solo 401(k), are generally exempt from UDFI on debt-financed real estate when certain conditions are met. IRAs don’t get this exception. If you’re self-employed and want to invest in leveraged real estate, holding it in a Solo 401(k) instead of an IRA can eliminate the UDFI problem entirely. The exception covers real estate debt only, not operating business income, and it has specific requirements, which I explain in Understanding the UDFI Exception for Solo 401(k) Real Estate Investors.

Put the highest-growth funds in a Roth

UBIT applies to Roth IRAs too, so a Roth doesn’t solve the UBTI problem. But for funds with little or no UBTI, such as most venture capital funds, a Self-Directed Roth IRA lets every dollar of appreciation come out tax-free once you meet the qualified distribution rules. I’d generally put my highest expected-return, lowest-UBTI funds in a Roth.

Ask the sponsor for UBTI history

Before committing, ask for the fund’s prior K-1s or an estimate of UBTI as a percentage of income. A sponsor who can’t answer that question hasn’t thought about tax-exempt investors, which tells you something too.

What Happens If Your IRA Has UBTI: Form 990-T and Trust Tax Rates

If your IRA’s share of gross unrelated business income from all sources reaches $1,000 or more in a year, the IRA generally must file IRS Form 990-T. The IRA gets a $1,000 specific deduction, so a small amount of UBTI may produce little or no tax, but the return still has to be filed. The return is generally due April 15 for calendar-year IRAs, and an extension is available by filing Form 8868. The IRS Publication 598 covers the rules in detail.

The tax itself is calculated at trust tax rates, which are steep. Trusts reach the top 37% federal bracket at a fraction of the income it takes an individual to get there, so even modest UBTI gets taxed at high rates.

Two practical points trip people up. First, the tax is owed by the IRA and paid from IRA assets, not from your personal checking account. Paying it personally can be treated as an excess contribution or raise prohibited transaction concerns. Second, private fund K-1s often arrive late, sometimes well after April 15, so plan on extending the 990-T. Make sure your IRA keeps enough cash on hand to pay any tax, since a private fund interest can’t be sold to cover it. For more on how leverage drives this, see UBIT and UDFI Explained.

Other Rules to Know Before Your IRA Invests in a Private Fund

Accredited investor status. Most private funds are offered only to accredited investors. Your IRA generally qualifies based on your status as the account owner. For individuals, the SEC’s accredited investor definition includes net worth over $1 million excluding your primary residence, or income over $200,000 ($300,000 with a spouse or partner) in each of the past two years, as well as holders of certain securities licenses.

Prohibited transactions. Your IRA can’t invest in a fund in a way that benefits you or another disqualified person. If you, your spouse, or your children manage the fund, serve as its general partner, or would earn fees or carried interest from your IRA’s investment, you’re likely looking at a prohibited transaction. The same concern applies if the fund would lend to or buy from a business you control. The IRS prohibited transaction rules apply no matter how attractive the deal looks.

Capital calls. Many funds don’t take your full commitment upfront. They call capital over several years. Your IRA has to have the cash when each call comes, and you can’t simply pay a call from personal funds beyond your normal IRA contribution. Missing a call can mean penalties or forfeiting part of your interest, so commit only what your IRA can cover.

Annual valuation. Your custodian must report your IRA’s fair market value to the IRS each year. Plan on providing the fund’s year-end capital account statement, which matters even more once you reach required minimum distribution age.

Fee structure matters with private funds, too. Some custodians charge per asset or per transaction, which adds up quickly when a single fund makes a dozen capital calls. At IRA Financial, the Self-Directed IRA is a flat $495 a year with no asset value fees or asset purchase fees, so your custody cost doesn’t grow as the fund calls capital or appreciates.

Final Thoughts

Private funds can be some of the most rewarding investments a Self-Directed IRA ever makes, but taxes are where the details matter most. A venture or private credit fund may never generate a dollar of UBTI, while a leveraged real estate or buyout fund can send your IRA a tax bill every year. Before you commit, read the offering documents, ask the sponsor about leverage, operating income, and blocker options, and think about which account, a traditional IRA, a Roth, or a Solo 401(k), is the best home for each fund. A few questions upfront can keep thousands of dollars inside your retirement account where they belong.

This content is for educational purposes only and does not constitute legal, tax, or investment advice. Consult a qualified professional before making any investment decisions.