This article analyses how an arm’s length interest rate for an intercompany loan can be determined under the two most commonly accepted approaches; the loan approach and the bond approach. In this respect, it first provides some considerations as to performing a loan benchmarking study, followed by some of the main differences and theoretical advantages and disadvantages of the two approaches. As a second step, a case study is presented, for which an arm’s length interest rate is determined under both approaches. The results of the two approaches are then discussed and compared. It is argued that the bond approach yields much more reliable results.