Except as otherwise provided in this paragraph (a)(2), in the case of a loan or advance between members of a group of controlled entities, an arm’s length rate of interest referred to in paragraph (a)(2)(i) of this section shall be for purposes of chapter 1 of the Internal Revenue Code –
(1) The rate of interest actually charged if that rate is –
(i) Not less than 100 percent of the applicable Federal rate (lower limit); and
(ii) Not greater than 130 percent of the applicable Federal rate (upper limit); or
(2) If either no interest is charged or if the rate of interest charged is less than the lower limit, then an arm’s length rate of interest shall be equal to the lower limit, compounded semiannually; or
(3) If the rate of interest charged is greater than the upper limit, then an arm’s length rate of interest shall be equal to the upper limit, compounded semiannually, unless the taxpayer establishes a more appropriate compound rate of interest under paragraph (a)(2)(i) of this section. However, if the compound rate of interest actually charged is greater than the upper limit and less than the rate determined under paragraph (a)(2)(i) of this section, or if the compound rate actually charged is less than the lower limit and greater than the rate determined under paragraph (a)(2)(i) of this section, then the compound rate actually charged shall be deemed to be an arm’s length rate under paragraph (a)(2)(i). In the case of any sale-leaseback described in section 1274(e), the lower limit shall be 110 percent of the applicable Federal rate, compounded semiannually.
