The best time to perform a cost segregation study is the same year you buy, build, or remodel your real property. But you can wait until a future year—perhaps when you have enough rental or other passive income to use the speeded-up depreciation deductions.
Cost Seg. Studies are oversold!
Cost segregation may not be advisable for every property owner—for example, where it results in a loss that can’t be deducted due to the passive loss rules or where the owner intends to sell the property within a few years and has to recapture the cost-segregated depreciation deductions as ordinary income.