Some time ago, I made a real estate loan investment, with the loan being secured by the deed of the property involved. The idea was that the debtor would use the money to purchase a run-down property and fix it up over a period of months, paying monthly interest-only payments to me during that time (which I of course reported as interest income), then eventually sell the improved property at a profit and use those proceeds to pay off the loan. I've done a few such loans, but it's certainly not my trade or business. I'm a full-time engineer, that's how I make my living and for me, the real estate loans have genuinely been just a side way of generating some extra income, akin to owning bonds or dividend-paying stocks, but just with a higher yield than those. As such, if I understand things correctly, this does not constitute a "business debt" for tax purposes.
In the case of this loan, things went badly and at the end 2010, the debtor defaulted and I assumed ownership of the property. However, with the drop in real estate prices that had occurred in that location, the current value of the property is actually about 15% less than the outstanding loan balance. From a tax perspective, is this default effectively like I purchased the property, with the original loan amount becoming my cost basis? For example, if I were to close out the whole deal by selling the place tomorrow, does that then become reported as a capital loss of 15% for 2011? Or could it even be a capital loss of 15% in 2010, with my cost basis going forward from that time becoming that now lowered property value, rather than the original loan amount? Or does the fact that the deal originated as a loan mean that it would be reported in some other manner altogether?