Blocker Corporation

What is a blocker corporation?

A blocker corporation is a corporation, usually a Delaware C-corp or a Cayman company, that a fund places between an investment and certain investors so the investment's tax character stops at the corporation. The corporation pays tax on the income; the investor behind it receives corporate distributions instead of a partnership allocation.

What is a blocker entity?

Blocker entity is the same idea stated more loosely. It covers any entity interposed to break a flow-through chain, including an LLC that has elected to be taxed as a corporation, an offshore blocker used for non-U.S. investors, and a lower-tier blocker that sits under the fund and holds only one portfolio company. The word blocker describes a function, not a specific form of organization. What matters is that the entity is treated as a corporation for U.S. federal income tax purposes, because only then does it absorb the income rather than pass it through.

The problem blockers solve for tax-exempt LPs

Endowments, foundations, pension plans and IRAs are exempt from income tax on their investment returns, but the exemption is not unlimited. The Internal Revenue Service applies a three-part test to identify unrelated business income: the activity is a trade or business, it is regularly carried on, and it is not substantially related to furthering the exempt purpose of the organization. Income that meets all three tests is unrelated business taxable income, and an exempt organization with $1,000 or more of gross income from an unrelated business must file Form 990-T.

A venture fund is a partnership, so its character flows through to its partners. Most venture income is safe. Section 512(b)(1) excludes dividends and interest from unrelated business taxable income, and section 512(b)(5) excludes gains and losses from the sale, exchange, or other disposition of property. A fund that buys preferred stock in C-corps and sells it years later is generating exactly the kind of income those modifications exclude.

Two fact patterns break that comfort. The first is a portfolio company held as a partnership or an LLC that has not elected corporate treatment. Its operating income is trade or business income and it flows through the fund to the exempt LP. The second is leverage. Section 514 defines debt-financed property as property held to produce income with respect to which there is acquisition indebtedness, and section 512(b)(4) overrides the dividend, interest and gain exclusions to the extent income is debt-financed. The includible fraction is the average acquisition indebtedness for the year divided by the average adjusted basis of the property.

Section 512(a)(6) makes the exposure worse than it first looks, because unrelated business taxable income must be computed separately with respect to each trade or business. An exempt LP cannot net a loss from one unrelated business against income from another. A blocker corporation can net its own income and losses inside a single taxpayer.

The problem blockers solve for non-U.S. LPs

Where a fund holds a pass-through operating business, the fund has income effectively connected with a U.S. trade or business, and section 1446 turns that into the foreign LP's problem. A partnership with effectively connected taxable income allocable to its foreign partners must withhold on it, so the exposure reaches the investor whether or not the investor wanted a U.S. tax position.

The rates are punitive by design. Withholding is at the highest rate applicable to the partner: 37 percent for non-corporate foreign partners and 21 percent for corporate foreign partners. The partnership remits with Form 8813, reports annually on Form 8804, and issues each foreign partner a Form 8805. A sovereign wealth fund or an offshore family office that has told its board it will never file a U.S. return treats that outcome as a breach, not a tax cost.

A blocker changes who is in that chain. The corporation is the U.S. taxpayer that files and pays, and the foreign investor holds stock in a corporation rather than an interest in a partnership carrying on a U.S. business.

Worked example

The figures below are hypothetical and chosen to make the arithmetic visible.

A $200 million fund has an endowment LP that committed $20 million, so the endowment holds 10 percent of the fund. One portfolio company is organized as an LLC taxed as a partnership and is profitable, allocating $6 million of operating income to the fund in a single year.

Step one, the fund's allocation. The endowment's share is 10 percent of $6 million, which is $600,000 of unrelated business taxable income.

Step two, the tax. At the 21 percent corporate rate, $600,000 produces $126,000 of tax, and the endowment must file Form 990-T because its gross unrelated business income is far above the $1,000 filing threshold.

Step three, the blocker alternative. The fund forms a blocker C-corp that holds the endowment's slice of the LLC interest. The blocker receives the same $600,000 allocation and pays the same 21 percent, which is $126,000. The dollar tax in this single year is identical.

That equality is the point most explanations miss. The blocker is not primarily a rate arbitrage. What the endowment buys is that it never files Form 990-T for this position, never reports unrelated business taxable income to its own board and auditors, and never picks up the state filings that follow an operating business into every state where it has activity. It also escapes section 512(a)(6): if the fund holds a second pass-through business that loses $400,000 in the same year, the endowment investing directly must silo the two and still pay $126,000, while the blocker nets to $200,000 of taxable income and pays 21 percent of that, which is $42,000. The blocker saves $84,000 in that scenario.

Step four, the leverage case. Suppose instead the fund holds a position with an average adjusted basis of $10 million and average acquisition indebtedness of $4 million. The debt-financed percentage is $4 million divided by $10 million, or 40 percent. If that position throws off $2 million of otherwise-excluded income, then 40 percent of it, or $800,000, is dragged into unrelated business taxable income at the fund level, and the endowment's 10 percent share is $80,000.

How blockers show up in fund documents

Blockers rarely appear in the limited partnership agreement as a promise to build one. They appear as authority and as allocation of cost. Expect three things. First, a provision letting the general partner structure any investment through one or more alternative investment vehicles or subsidiary entities, including corporations, where tax or regulatory considerations make it advisable. Second, a statement that the expenses and taxes of a vehicle formed for the benefit of particular partners are borne by those partners rather than the fund as a whole, which is what keeps taxable LPs from subsidizing the endowment's structure. Third, side letter language in which a specific LP asks for notice, or for the right to be excused, when an investment would generate unrelated business taxable income or effectively connected income.

The economics live in that second provision. A blocker is a real entity with formation costs, a registered agent, a separate federal return, state returns, and an audit line. Those costs land somewhere, and the LPA decides where.

Common mistakes

• Treating a blocker as free. The corporation pays entity-level tax at 21 percent, and a second layer applies when value leaves the corporation. For a fund whose returns are mostly long-term capital gains already excluded under section 512(b)(5), inserting a blocker across the whole portfolio destroys value for no benefit.
• Blocking at the wrong level. The usual answer is a lower-tier blocker under the fund holding only the problem asset, or a parallel feeder for the affected investors, not a blocker wrapped around the entire fund.
• Forgetting the exit. A blocker holds stock or an LLC interest with a basis history of its own. Buyers frequently discount a blocker because they inherit its built-in gain and its tax attributes, so the sale of a blocked position is negotiated differently from the sale of a direct position.
• Assuming capital gains are always safe. They are excluded under section 512(b)(5), but section 512(b)(4) pulls debt-financed gain back in under the section 514 formula.
• Confusing the two investor problems. A tax-exempt LP is managing unrelated business taxable income. A non-U.S. LP is managing effectively connected income and section 1446 withholding. The same corporation can solve both, but the diligence questions, and the LPs who ask them, are different.

Related terms

A feeder fund is the broader structure a blocker often sits inside: a parallel vehicle through which a class of investors accesses the main fund, sometimes with a corporation at the top for exactly the reasons above. A UBTI blocker is the tax-exempt-facing case described here, and a FIRPTA blocker is the narrower real-property version aimed at a different statute. Tax distributions are the companion mechanic on the other side: where no blocker is used and income does flow through, an LPA may require the fund to distribute enough cash for partners to pay the tax the allocation created.

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