As a general rule, REMICs issue several classes of “regular” interests and a single class of “residual interests.” (See Q 7695 for a discussion of “residual interests.”) Regular interests are subject to federal income tax under the following rules.
An interest in a REMIC is a regular interest if it (1) was issued as a designated regular interest on the “startup day” selected by the REMIC, (2) unconditionally entitles the holder to a specified principal amount, and (3) provides for interest payments (if any) that (a) are based on a fixed rate, or, to the extent provided in regulations, at a variable rate, or (b) consist of a specified, unvarying portion of the interest payments on qualified mortgages.2 See Notice 93-112 for the Service’s acceptance of a floating rate as a variable rate.3
Under regulations effective for most obligations issued on or after April 4, 1994, a variable rate includes a qualified floating rate as defined in Treasury Regulation Section 1.1275-5(b)(1). In addition, a rate equal to the highest, lowest, or average of two or more qualified floating rates is a variable rate for purposes of IRC Section 860G.