Priced off your own construction ledger
You built it, so you hold the construction ledger. That is the difference between a cost segregation study priced off real cost detail and one an engineer reverse-estimates from an appraisal. The study is only half of it. When the asset is placed in service, whether a phased project gets one date or one per building, and how bonus depreciation interacts with the year you actually needed the deduction all sit alongside it.
What we typically see: Studies ordered after the placed-in-service date. One whole-project study where a study per building would have pulled deductions forward. Bonus depreciation taken in a year with nothing to offset.

23 pages and 12 categories, written by Jose A. Ramirez, EA. Work through it with your job cost ledger open and see which deductions you have not claimed and which records you still need.
Get the ChecklistEducational content only. Not individualized tax advice.

Phasing the studies by building moved a serious amount of depreciation into the year we needed it.
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