A popular form of long-term investment is real estate rentals.  Rentals can fall into several varieties, of which real estate rentals is the most common. This material will explain some of the tax ramifications of renting real estate, both residential and commercial.  Specifically excluded from this discussion are transient rentals, where the tenants rent for an average of seven days or less, such as motels and equipment (machinery) rentals.  Both are considered self-employment businesses for tax purposes and thus subject to self-employment taxes.