Whether 2006 interest on the consolidated home-construction loan was deductible as pass-through interest for federal income tax
No; the interest remained part of the construction financing and was non-deductible investment expense until the property generated taxable income.
The economic function of the loan, not its label, controls. Because the mortgage consolidated the construction credit and formed part of the project’s financing plan, the interest was an acquisition/improvement cost under Art. 34 let. d LIFD. Deduction under Art. 33 al. 1 let. a LIFD presupposes taxable return on assets, which was absent for 2006.