The Mechanics of Real Estate Investment Trusts: The 90% Distribution Rule, Asset Tests, and Types

Commercial real estate offers steady cash flow and inflation protection, but the barrier to entry is notoriously high. For decades, purchasing a skyscraper, a regional mall, or a portfolio of apartment buildings required massive institutional capital, leaving everyday investors locked out of the asset class and forced to choose between the volatility of the stock market and the illiquidity of direct residential property ownership.[7]

The Real Estate Investment Trust (REIT) structure was created by Congress in 1960 to resolve this exact tension. By allowing investors to pool their money to buy shares in a portfolio of real estate assets, REITs democratized commercial property ownership, bringing stock-market liquidity to an inherently illiquid physical asset class.[3]

The defining feature of a REIT is not just what it owns, but how it is taxed. Traditional corporations face double taxation: the company pays corporate income tax on its profits, and shareholders pay tax again on the dividends they receive from those remaining profits.[3][4]

REITs bypass this corporate-level tax entirely, but only if they adhere to strict mandates outlined in the IRS tax code. The most famous of these mandates is the 90% distribution rule, which forces the entity to act as a pass-through vehicle rather than a traditional corporate cash accumulator.[1][4]

Under IRS guidelines, a REIT must distribute at least 90% of its taxable income to its shareholders annually in the form of dividends. In practice, many REITs distribute 100% of their taxable income to completely eliminate any residual corporate tax liability, resulting in dividend yields that are typically much higher than those of the broader S&P 500.[4][5]

This pass-through structure shifts the tax burden directly to the investor. Because the REIT itself does not pay tax, the dividends distributed to shareholders are generally taxed as ordinary income, rather than the lower qualified dividend rate applied to traditional corporate stocks.[4][5]

For a retail investor, this distinction is critical. Holding REIT shares in a standard taxable brokerage account can result in a significant tax drag, which is why financial advisors frequently recommend placing them in tax-advantaged accounts like IRAs or 401(k)s, where the high dividend yield can compound without immediate tax consequences.[7]

Beyond the distribution requirement, a company must pass rigorous asset tests to maintain its REIT status. The IRS dictates that at least 75% of a REIT's total assets must be invested in real estate, cash, or U.S. Treasuries, ensuring the vehicle remains tethered to its intended sector.[1][2]

Furthermore, at least 75% of the entity's gross income must be derived directly from real estate sources. This typically means collecting rents from physical properties, earning interest on mortgages financing real property, or realizing gains from the sale of real estate assets.[1][2]

If a REIT fails to meet these thresholds, it risks losing its tax-advantaged status. Such a failure would trigger severe financial penalties, as corporate taxes would be retroactively applied, likely causing a sudden and severe drop in shareholder value.[5]

While all REITs operate under these same tax rules, they generally fall into two distinct categories: Equity REITs and Mortgage REITs, commonly known as mREITs.[6]

Equity REITs are the most common and straightforward. They acquire, manage, and develop physical properties—ranging from multifamily apartment complexes and logistics warehouses to data centers and medical facilities. Their revenue is primarily generated through the collection of rent from tenants.[6]

Mortgage REITs, on the other hand, do not own physical real estate. Instead, they provide financing for real estate by purchasing or originating mortgages and mortgage-backed securities. Their income is derived from the net interest margin—the spread between the interest they earn on mortgage loans and the cost of borrowing to fund those loans.[6]

The macroeconomic environment impacts these two types differently. While Equity REITs can often raise rents to combat inflation and benefit from property appreciation, mREITs are highly sensitive to interest rate fluctuations, which can rapidly compress their profit margins and disrupt their ability to maintain high dividend payouts.[7]