SECTION 4. BACKGROUND PRINCIPALLY SECURED BY AN
Internal Revenue Bulletin 2010-36 · 2026-10-03 edition · updated 2026-10-04 · United States
INTEREST IN REAL PROPERTY
.01 A mortgage loan is a qualified mortgage only if it is principally secured by an interest in real property. Section 860G(a)(3)(A). .02 In general, for purposes of section 860G(a)(3)(A), an obligation is principally secured by an interest in real property only if it satisfies the “80-percent test” set forth in § 1.860G–2(a)(i). (Section 1.860G–2(a)(ii) contains an alternative test.)
.03 Under the 80-percent test, an obligation is principally secured by an interest in real property if the fair market value of the interest in real property securing the obligation—
(1) Was at least equal to 80 percent of the adjusted issue price of the obligation at the time the obligation was originated; or
(2) Is at least equal to 80 percent of the adjusted issue price of the obligation at the
2010–36 I.R.B. 316 September 7, 2010
other interest unless the investment trust structure was created to avoid the prohibited transaction rules of section 860F(a). Analogously, unless a substantial purpose of the trust structure was to avoid the restrictions imposed by § 1.860G–2(a)(8) and § 1.860G–2(b), the release of a lien on an interest in real property that secures an obligation held by the trust does not cause § 1.860G–2(a)(8) automatically to disqualify the obligation.
.11 When there are significant declines in commercial real estate property values, properties that secure commercial loans may fall in value to an amount below the 80 percent threshold. The borrower may be in default on its obligation or default may be reasonably foreseeable. In these instances, the servicer may work with the borrower to avoid default.
.12 In the preamble to final regulations published September 16, 2009 (the “Final Regulations”), the Service noted that, although a qualified mortgage must be principally secured by an interest in real property, a release pursuant to the terms of a mortgage obligation is not a release that disqualifies the mortgage if the mortgage continues to be principally secured by real property after giving effect to any releases, substitutions, additions, or other alterations to the collateral. In addition, the preamble explains that a lien release occasioned by a default or reasonably foreseeable default would not disqualify a mortgage if the principally secured test continues to be satisfied. See T.D. 9463, 74 FR 47436–01.
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