Depreciation — the biggest tax benefit of direct ownership
The IRS lets you deduct a portion of the building cost (not land) each year as depreciation — over 27.5 years for residential, 39 for commercial. A $300K building generates ~$10,900/year of deductions. At a 32% marginal rate, that's $3,500/year in tax savings even before any other deduction.
Depreciation is a non-cash expense — you don't actually spend the money — but the IRS treats it as deductible. The result is that profitable rentals often show a "paper loss" for tax purposes, sheltering rental income or even (under specific rules) other income.
The catch: when you sell, "depreciation recapture" kicks in — the depreciation you took comes back as taxable income at up to 25% federal rate. The benefit isn't free; it's a deferral. But over decades, deferred tax compounding is enormously valuable, especially when combined with 1031 exchanges and step-up at death.
Cost segregation studies accelerate this further — they reclassify parts of the building into shorter-life buckets (5, 7, 15 years) for faster front-loaded deductions. Worth the $3K–$10K study cost on properties over $500K in most cases.