Rental & Passive Activity Rules

A cost segregation study is an engineering-based tax analysis that reclassifies components of a commercial or residential rental building from 27.5- or 39-year real property into shorter-lived asset classes—typically 5-year, 7-year, or 15-year property under MACRS—so that depreciation deductions are accelerated into earlier tax years. By front-loading those deductions, property owners can significantly reduce taxable income in the years immediately following acquisition, construction, or renovation. The study is performed by a qualified engineer or cost segregation specialist who physically inspects the property and allocates costs to specific asset categories under IRC §168 and related IRS guidance. Bonus depreciation under IRC §168(k), including the 100% expensing reinstated for certain property under the One Big Beautiful Bill Act (P.L. 119-21), can amplify the benefit further by allowing immediate expensing of newly identified short-lived assets. Cost segregation is most valuable for taxpayers who own high-value properties, have sufficient taxable income or passive activity to absorb the deductions, or qualify as real estate professionals under IRC §469(c)(7). Pennsylvania and several other states do not follow federal bonus depreciation or MACRS recovery periods and require separate state adjustments, so a state-by-state review is essential before projecting net savings.

Choosing the wrong entity for a real estate portfolio is not just an administrative mistake -- it can permanently foreclose tax strategies, create self-employment tax exposure, or trigger unexpected gain recognition on a later restructuring. The right structure depends on how the property is held, who the investors are, what the exit plan looks like, and whether passive activity rules or real estate professional status are in play. A single-member LLC disregarded for tax purposes behaves nothing like a partnership, and an S corporation creates problems for real estate that most investors do not anticipate until it is too late. This article walks through each major entity type, the tax and legal tradeoffs specific to real estate, common structuring mistakes, and the questions investors ask most often.

Section 469 of the Internal Revenue Code limits your ability to deduct losses from passive activities against non-passive income like wages, business income, or portfolio income. A passive activity is generally any trade or business in which you do not materially participate, plus most rental activities regardless of participation level. Losses that cannot be used in the current year are not gone - they are suspended and carried forward until you either have passive income to absorb them or you dispose of the activity in a fully taxable transaction. Understanding these rules is the foundation for nearly every rental and real estate tax planning conversation.