A blocker corporation is a taxable entity interposed between a fund and certain investors to absorb income that would otherwise create tax problems for those investors. The most common use case is blocking unrelated business taxable income (UBTI) for tax-exempt LPs, but blockers are also used to simplify tax filing for foreign investors by blocking effectively connected income (ECI) that would otherwise require U.S. tax returns and withholding.
How Blockers Work
In a standard fund structure, income flows through the partnership directly to investors on their K-1s. With a blocker, the investor does not hold a direct LP interest. Instead:
- The investor invests through a separately formed corporation (the blocker)
- The blocker corporation holds the LP interest in the fund
- The blocker receives the pass-through income (including UBTI or ECI) and pays corporate income tax on that income
- Distributions from the blocker to the underlying investor are dividends, not pass-through partnership income
- Because dividends are not UBTI (for tax-exempt investors) and may benefit from reduced treaty withholding rates (for foreign investors), the blocker effectively "blocks" the problematic income from reaching the investor
When Blockers Are Used
Blockers serve different purposes depending on the type of investor:
- Tax-exempt investors (endowments, foundations, pensions, IRAs). These investors use blockers to absorb UBTI generated by fund leverage, operating business income, or controlled foreign corporation income. Without a blocker, the tax-exempt investor would owe federal income tax on its share of UBTI, undermining the tax advantage of its exempt status.
- Foreign investors. Non-U.S. investors use blockers to avoid ECI, which would otherwise require them to file U.S. tax returns, pay U.S. income tax, and comply with U.S. withholding requirements. The blocker converts what would be ECI into dividend income, which may be subject to lower withholding rates under an applicable tax treaty.
Structure Options
Blocker corporations can be structured in several ways, depending on the number of investors who need them and the costs involved:
- Domestic C-corporation. Formed in Delaware or another U.S. state, subject to U.S. corporate income tax at 21%. This is the simplest approach for tax-exempt U.S. investors.
- Offshore entity. Commonly formed in the Cayman Islands, used primarily for foreign investors. Offshore blockers may benefit from tax treaty provisions that reduce withholding on dividend distributions to the ultimate investor.
- Single blocker for multiple investors. When several investors need blocking, a single blocker entity can hold the LP interest on behalf of all of them, reducing formation and maintenance costs.
- Individual blockers. Some investors prefer their own dedicated blocker for control and confidentiality. This is more expensive but avoids commingling with other investors' interests.
Costs and Tradeoffs
Blockers are not free. The costs and complexities must be weighed against the tax benefits:
- Entity formation and maintenance. Each blocker requires formation (legal fees, state filing fees), an EIN, a registered agent, and ongoing annual filings. For offshore entities, the costs include Cayman formation fees and registered office requirements.
- Corporate tax returns. Each blocker must file its own corporate tax return annually, adding accounting and tax preparation costs. Domestic blockers file Form 1120; offshore blockers may have their own filing requirements.
- Potential double taxation. Income is taxed once at the corporate level (when the blocker receives it from the fund) and potentially again when distributed as dividends to the investor. For tax-exempt investors, the second layer is generally not an issue because dividends are not UBTI. For foreign investors, the dividend withholding rate depends on the applicable tax treaty.
- Justification threshold. Blockers are only justified when the expected UBTI or ECI exposure is significant enough to warrant the ongoing cost. A small allocation of UBTI may be less expensive to pay tax on directly than to run through a blocker.
Fund Manager Considerations
If your fund has or expects tax-exempt or foreign investors, you should plan for blocker structures during fund formation, not after the fact:
- Disclose in the PPM. Your offering documents should describe whether the fund offers a blocker vehicle or expects investors to arrange their own. LPs will ask about this during diligence.
- Accommodate during onboarding. If offering a fund-sponsored blocker, the onboarding process must include the blocker subscription and any additional documentation required for the intermediate entity.
- Consider a parallel blocker vehicle. Some funds establish a parallel vehicle specifically for tax-exempt or foreign investors, with the blocker built into the fund structure from the start. This is more common for larger funds with a significant institutional LP base.
- Administrator tracking. Your fund administrator must track the blocker as a separate entity, maintaining its own books, capital accounts, and tax reporting alongside the main fund.
This article is for informational purposes only and does not constitute legal or tax advice. Consult qualified professionals for guidance specific to your situation.