Let's tie this all together with a practical filter: When should you consider doing a cost segregation study on your property or properties? You should at least explore cost segregation if you've bought, built, or significantly renovated an income-producing property in the last 15 years. Your depreciable basis is meaningful enough that accelerating 20 to 40 percent of it would move the needle for you. If you're in a tax bracket where those additional deductions truly matter, understanding bonus depreciation and overall tax strategy can lead to significant real estate tax savings.