Topic 05 · 5 min read
Cost Segregation Studies
Pull tomorrow's deductions into this year.
A building is not one asset — it is thousands. A cost segregation study is an engineering analysis that reclassifies parts of a property into 5, 7, and 15-year categories instead of leaving everything on a 27.5 or 39-year schedule.
What to know
- What gets reclassified
- Flooring, cabinetry, dedicated electrical for equipment, decorative lighting, fencing, paving, and landscaping.
- Engineering-based studies
- The credible version uses construction drawings, site visits, and cost records, and produces a report that can be defended under examination.
- When it pays
- Generally worth it above roughly $500,000 of building value, especially for short-term rentals, multifamily, and medical or retail buildings.
- Timing
- Best performed in the year of purchase or after major construction. A look-back study can catch up missed depreciation on a property already owned.
- Pairing with bonus depreciation
- Once assets sit in short-life buckets, bonus depreciation can accelerate a large portion of them immediately.
The tax benefit
Deductions move into earlier years. The total write-off is the same, but the cash saved arrives sooner and can be reinvested.
Worked example
$1.2 million apartment building
A study reclassifies $260,000 into short-life assets. Instead of a slow 27.5-year trickle, a large share becomes deductible right away.
Watch out for
- Accelerated deductions mean heavier recapture if the property sells soon after.
- Fees typically run several thousand dollars — run the math first.
- Cheap, non-engineering studies are audit bait.
Terms from this topic
Cost segregationShort-life assetLook-back studyReclassification
0 of 9 topics done in this installment.