You can hold a limited partnership in an IRA, but only inside a self-directed IRA with a custodian that accepts alternative assets, and only as a passive limited partner. The IRA, not you, is the legal investor. Every dollar in and out stays inside the account. Get the structure right and the tax shelter holds; get it wrong and the IRS can treat your entire balance as a taxable distribution on day one of the year the mistake occurred.
The Account You Need and How to Fund It
Mainstream brokerage IRAs limit you to publicly traded securities. A private LP interest doesn’t fit that menu, so you need a self-directed IRA (SDIRA) held by a custodian that handles alternative assets. The custodian titles the asset in the IRA’s name and processes your instructions. It does not vet the deal, confirm it complies with the prohibited transaction rules, or warn you about tax exposure. That work is yours.
Both traditional and Roth SDIRAs can hold LP interests. A traditional SDIRA defers tax on growth until distribution; a Roth offers tax-free qualified distributions. One trap worth flagging up front: the Roth’s usual tax shield does not cover unrelated business taxable income. If the partnership generates UBTI, the Roth owes the tax just like a traditional account.
For 2026, annual IRA contributions are capped at $7,500, or $8,600 if you’re 50 or older.1Internal Revenue Service. Retirement Topics – IRA Contribution Limits Most LP minimums are far larger than one year’s contribution, so investors usually fund an SDIRA by rolling over a 401(k) or another IRA rather than contributing fresh money.
Structural Rules That Keep the Holding Legal
The partnership interest must be titled in the name of the IRA, typically something like “ABC Custodian FBO [Your Name] IRA.” If the interest is titled to you personally, the IRS treats the whole thing as a distribution. There is no clean fix after the fact.
Your IRA must take a limited partner role only. Limited partners contribute capital, receive distributions, and share in profits and losses without managing the business. That passivity is what lets the arrangement sit inside a tax-exempt account. An IRA acting as general partner is running an active business, which multiplies both the prohibited transaction risk and the UBTI exposure.2Office of the Law Revision Counsel. 26 USC 408 – Individual Retirement Accounts
The underlying investment also has to be a real investment, not a vehicle for personal benefit. Your IRA cannot invest in a partnership whose assets you use yourself, such as a vacation home, a car, or art hanging in your living room.3eCFR. 26 CFR 1.408-2 – Individual Retirement Accounts You also cannot manage the partnership, provide services to it, or receive any compensation from it. That line between you and the operation is the single most important compliance habit to maintain.
Prohibited Transactions and Disqualified Persons
The fastest way to wreck an SDIRA holding an LP interest is a prohibited transaction under IRC Section 4975. The penalty is not proportional. A single prohibited transaction, regardless of size or intent, disqualifies the entire IRA as of the first day of that tax year. The IRS then treats the full fair market value of every asset in the account as a taxable distribution to you.2Office of the Law Revision Counsel. 26 USC 408 – Individual Retirement Accounts If you’re under 59½, add a 10% early withdrawal penalty.
A prohibited transaction is any direct or indirect dealing between the IRA and a “disqualified person.” That category is wider than most people assume. It covers you (treated as a fiduciary of the account), your spouse, your ancestors and lineal descendants and their spouses, anyone providing services to the IRA, and any entity in which you or those family members own 50% or more.
The rule is mechanical. A fair-market-value transaction with a disqualified person is still prohibited. The most common ways LP investments run into trouble:
- The partnership buys from or sells to you, your spouse, or another disqualified person.
- You or a disqualified person provides property management, legal, or accounting services to the partnership, even without charge — the IRS can read a free service as an indirect benefit.
- You or a family member uses partnership property personally, even at market rent.
Intent and fairness don’t enter into it. If the transaction happened between the IRA and a disqualified person, the account is disqualified.4Internal Revenue Service. Retirement Topics – Prohibited Transactions5Office of the Law Revision Counsel. 26 USC 4975 – Tax on Prohibited Transactions
UBIT: When Your Tax-Exempt Account Owes Tax
An IRA’s tax exemption covers passive investment income, such as interest, dividends, most rental income, and capital gains on securities. Income from an active trade or business is unrelated business taxable income (UBTI) and gets taxed inside the account.2Office of the Law Revision Counsel. 26 USC 408 – Individual Retirement Accounts
Limited partnerships generate UBTI often. A partnership that develops and flips property, operates a restaurant, runs any service business, or does anything the IRS views as an active trade or business will push UBTI through on your Schedule K-1. The resulting unrelated business income tax (UBIT) is paid by the IRA itself, reducing your retirement balance.
UBIT uses trust tax rates, which are heavily compressed. The 2026 brackets:
- 10% on the first $3,300
- 24% from $3,301 to $11,700
- 35% from $11,701 to $16,000
- 37% above $16,000
By comparison, an individual doesn’t hit 37% until well over $600,000 of taxable income. Even moderate UBTI can take a real bite. The IRA gets a $1,000 specific deduction against UBTI, which helps only at the margin.6Office of the Law Revision Counsel. 26 USC 512 – Unrelated Business Taxable Income
Debt-Financed Income
UBTI has a second source that catches real estate investors by surprise. When a partnership borrows to acquire or improve property, the share of income attributable to the borrowed portion is unrelated debt-financed income (UDFI), and it’s taxed inside the IRA even when the underlying rental activity is passive.7Office of the Law Revision Counsel. 26 USC 514 – Unrelated Debt-Financed Income If the partnership buys a $1 million property with $600,000 in debt, 60% of the net income is UDFI. The ratio is recalculated each year based on the average debt balance relative to adjusted basis. Real estate partnerships commonly use leverage, so UDFI is the most frequent UBTI source for SDIRA-held LP interests. Ask the sponsor about leverage before you commit.
Roth Accounts Are Not Exempt
A persistent misconception: because qualified Roth distributions are tax-free, a Roth SDIRA avoids UBIT. It doesn’t. IRC Section 408(e)(1) subjects all IRAs, including Roths, to the tax on unrelated business income under Section 511. Leveraged real estate inside a Roth is taxed on its UDFI at trust rates the same as inside a traditional IRA.
Annual Compliance: K-1, Form 990-T, and Valuation
Each year the partnership issues a Schedule K-1 to your SDIRA custodian, reporting the IRA’s share of income, deductions, and credits. UBTI shows up in Box 20, Code V.8Internal Revenue Service. Partners Instructions for Schedule K-1 Form 1065 (2025) – Section Box 20 Other Information If gross UBTI from all sources reaches $1,000 for the year, the custodian must file IRS Form 990-T for the IRA. For IRAs, the filing is due April 15 following the tax year.9Internal Revenue Service. Instructions for Form 990-T (2025) – Section When To File The tax is paid from the IRA’s cash balance, not from your personal account.
Your part is making sure the partnership knows the investor is a tax-exempt IRA and that the K-1 reaches the right custodian address. Late K-1s are a chronic problem with private partnerships, and if the custodian misses the 990-T deadline, late-filing penalties and interest are assessed against the IRA. Flag the mailing address with the sponsor well before year-end and follow up early in tax season.
Separately, your custodian reports the fair market value of every account asset on IRS Form 5498, due May 31. For hard-to-value holdings like LP interests, the custodian relies on you or the partnership for the number and flags the asset using specific reporting codes.10Internal Revenue Service. 4Internal Revenue Service. Retirement Topics – Prohibited Transactions The workable path is contributing (within limits) or rolling in additional funds, then directing the custodian to pay the call. That takes time, and capital calls often come with short deadlines, so most investors keep a cash buffer of roughly 5% to 10% of account value. Missing a call can trigger dilution or forfeiture under the partnership agreement.
RMDs When the Asset Is Illiquid
Once required minimum distributions begin, an illiquid LP interest creates a practical squeeze. The RMD is calculated on the full fair market value of the IRA, including the partnership interest. The IRS doesn’t care that the asset can’t easily be sold.
If the SDIRA holds enough cash or liquid assets alongside the LP interest, take the RMD from the liquid side. Keeping at least a year’s RMD in cash is a sensible rule once you’re near or past the RMD age. If the account is mostly or entirely in the partnership, one option is an in-kind distribution: a portion of the LP interest is transferred out of the IRA into a taxable account, satisfying the RMD at its appraised value. The custodian reports it on Form 1099-R, and ordinary income tax applies. Paying that tax from non-IRA money preserves the account.
In-kind distributions carry their own complications. Partnership agreements commonly restrict transfers, and the general partner typically must approve any transfer of ownership. Before investing IRA funds in a partnership, read the LP agreement for transfer restrictions. If fractional transfers are blocked, you may be unable to satisfy RMDs without selling the whole position.
Exiting the Investment
LP interests are illiquid. There is no public exchange. A secondary market exists for private fund interests, but transactions are slower and often price at a discount to the most recent net asset value. The general partner usually has the right to approve any transfer, and partnership agreements often include a right of first refusal for the GP or existing partners. A simple sale might close in a few weeks; a complex one can take months.
Two constraints always apply when selling from an SDIRA. The proceeds must flow back into the IRA, with the buyer paying the custodian directly. And the buyer cannot be a disqualified person. Selling your IRA’s partnership interest to your spouse, your child, or a company you control is a prohibited transaction that disqualifies the whole account.5Office of the Law Revision Counsel. 26 USC 4975 – Tax on Prohibited Transactions
The Cost Stack
Holding an LP interest in an SDIRA generates fees a conventional IRA doesn’t carry. Annual custodial fees for alternative assets typically run from $300 to over $1,000, depending on custodian and complexity. Form 990-T preparation, when required, adds several hundred dollars more. Both come out of the IRA’s cash.
On top of custodial costs sit the partnership’s own management fees and carried interest, which reduce the distributions reaching your IRA. If the partnership produces UBTI, the UBIT further cuts the principal that compounds inside the account. A deal advertising a 12% gross return can net substantially less after custodial fees, trust-rate UBIT, and management fees are stacked together. Model all of it before you commit.