Questão jurídica principal
Whether the cantonal court wrongly limited deduction of private loan interest for the purchase financing.
Decisão extraída
No. The loan contract was concluded between the spouses, and the taxpayer failed to show that the claimed CHF 100,000 interest was deductible; the allowed 6.5% interest was sufficient.
Fundamentação extraída
The taxpayer attacked the wrong contractual relationship and did not substantiate the alleged riskiness needed for a higher rate. A 40% annual rate would in any event be untenable.