IRS Topic NO 414 Rental income and Expenses. The very first statement shows the following: CASH or the fair market value of property or services you receive for the use of real estate or personal property is taxable to you as rental income. In general, you can deduct expenses of renting property from your rental income.
Now the KEY WORDS ARE THIS: FAIR MARKET VALUE OF PROPERTY. therefore if you're NOT RENTING at Fair Market Value (FMV) then it is not then rental income ..in my opinion.
