An amount in K-1 Box 20 Code V is the partnership’s report of your share of unrelated business taxable income (UBTI) under Internal Revenue Code Section 512.1Internal Revenue Service. Partner’s Instructions for Schedule K-1 (Form 1065) (2025) If your IRA or another tax-exempt account holds the partnership interest and the gross figure reaches $1,000 for the year, the account owes income tax on that amount and a Form 990-T has to be filed, even though the account is otherwise tax-exempt.
What Code V Is Reporting
The IRS Partner’s Instructions define Code V as “unrelated business taxable income.” The partnership uses it to give a tax-exempt partner the number it needs to calculate tax under Section 512(a)(1). The reported figure excludes certain modifications under Section 512(b), paragraphs (8) through (15), which the tax-exempt partner applies on its own return.1Internal Revenue Service. Partner’s Instructions for Schedule K-1 (Form 1065) (2025)
UBTI is income a tax-exempt entity earns from a trade or business that isn’t substantially related to its exempt purpose. Congress created the rule so tax-exempt entities couldn’t run ordinary businesses tax-free and undercut taxable competitors. When your IRA becomes a partner in something that runs an active business or borrows money to buy investments, its share of that income can be taxable even though IRAs are otherwise exempt under Section 408.
Why Your IRA Can Owe Tax on This
IRA earnings normally grow tax-deferred, or in a Roth, tax-free. UBTI is the carve-out. When an IRA holds a partnership interest that generates UBTI above the gross threshold, that income is taxed inside the IRA at trust rates, and the tax is paid out of the IRA’s own assets, which directly reduces your retirement balance.
Roth IRAs get no pass here. Even though Roth earnings are normally never taxed again, UBTI above the threshold is still taxable inside a Roth. Investors who put an MLP or a private equity fund into a Roth expecting permanent tax-free treatment are sometimes blindsided by that.
The $1,000 Filing Threshold
A tax-exempt organization with $1,000 or more of gross UBTI during the tax year must file Form 990-T, “Exempt Organization Business Income Tax Return.” The account then pays tax on net UBTI after allowable deductions.
The threshold measures gross income, not net. If your Code V number is under $1,000, no Form 990-T is due for that year, but the figure is worth watching. UBTI can jump from one year to the next if the partnership takes on more leverage or shifts its operations, and a small Code V today can become a filing obligation tomorrow.
How Much Tax the IRA Actually Pays
IRAs pay UBTI tax at trust rates, and trust brackets compress fast. In recent years, trust income above roughly $15,000 to $16,000 has hit the top 37% rate. A modest Code V number can therefore run into the highest bracket quickly. Whatever the tax comes to is paid from inside the IRA, so the cost lands on your retirement savings rather than on your personal return.
What You Do vs. What the Custodian Does
You do not report Code V on your personal Form 1040. The IRA is the taxpayer here, not you. The IRA custodian files Form 990-T using the IRA’s own EIN and pays the tax from the account.
Your job is to get the K-1 to the custodian promptly and confirm they’ll handle the return. A few practical points:
- Forward the K-1 as soon as it arrives so the custodian has time to file before the deadline.
- Many custodians charge an additional fee for handling 990-T filings.
- Some smaller custodians won’t do UBTI filings at all, which can force a transfer to a self-directed custodian that offers the service.
- Complex partnerships often issue K-1s late. If yours is running behind, ask the custodian to file an extension for the 990-T.
Skipping the filing is the costliest mistake. If Form 990-T isn’t filed and the tax isn’t paid, the IRS can assess penalties and interest against the IRA itself, which erodes the account further.
What Kinds of Partnerships Trigger Code V
Two categories of partnership activity generate UBTI for a tax-exempt partner.
Active Trade or Business Income
If the partnership runs an actual business, whether manufacturing, retail, services, or energy production, your IRA’s share of that business income is UBTI. This is the straightforward trigger.
Debt-Financed Investment Income
When a partnership borrows to buy investment property, a portion of the income from that property becomes “unrelated debt-financed income” under Section 514. The taxable share is generally proportional to the debt on the property relative to its value. Rental income from a mortgaged apartment building is a common example, even though rental income from unencumbered real property would normally be excluded from UBTI.
Structures that tend to generate Code V include master limited partnerships with active operations, real estate funds that use mortgage financing, private equity funds with operating portfolio companies, and hedge funds that rely on leverage. Passive income like dividends, interest, royalties, and rent from unencumbered real property is generally excluded from UBTI under Section 512(b), so partnerships earning only those types of income usually don’t create a Code V problem.
If you’re considering a new partnership investment for your IRA, ask the general partner directly whether UBTI is expected. Some offering documents disclose it; many don’t unless asked. A small allocation to a partnership that produces steady UBTI can create annual tax and filing costs out of proportion to the investment’s size.
If You Hold the Partnership Directly, Not Through an IRA
Individual taxpayers holding a partnership interest in a taxable account generally don’t need to act on Code V. Your partnership income already flows through to your personal return from the other K-1 boxes. Code V exists for the benefit of tax-exempt partners; for a taxable individual, all of your share of partnership income is taxable anyway, so the “unrelated” concept doesn’t add anything.