What a Cost Segregation Study Actually Reclassifies
Answers to five connected questions about what a cost segregation study actually reclassifies. Review IRS sources, practical facts, records and filing responsibilities.
The decision this guide resolves
Cost segregation allocates existing depreciable basis among substantiated asset classes. It does not create new purchase basis or make land depreciable.
A practical fact pattern
A buyer receives a proposal claiming a fixed percentage of every rental is five-year property. Request an asset-based reconciliation rather than relying on a promised deduction.
Records to gather before deciding
- Closing statement, appraisal and land allocation
- Building plans, photos and asset inventory
- Invoices and original depreciation schedules
Frequently Asked Questions
What is cost segregation for a rental property?
It is an analysis allocating eligible property costs among assets with different tax lives and methods instead of depreciating all costs as one building. The analysis must support asset identification, costs and classifications. A quality study reconciles to the owner’s tax basis and the return preparer’s depreciation schedules.
Can I depreciate the land in a cost segregation study?
No. Land is not depreciable. Establish a reasonable land-versus-improvement allocation using support for the property rather than assigning zero land to increase deductions. A condo also requires reviewing the owner’s interest in common land and other components, not assuming no land basis.
Which rental assets can have shorter recovery periods?
Depending on function and facts, certain personal property and land improvements may have shorter recovery periods than the building. Furniture, some equipment and qualifying site improvements need their own identification and basis. A description such as carpet, electrical or landscaping does not by itself establish every tax classification.
Can a study put the whole building in five-year property?
A residential building’s structural costs generally remain long-life real property; nonresidential classification can differ. The study must distinguish building structure from eligible components. Reject a universal promised allocation and ask the preparer to explain the legal and factual support for each material category.
Is the IRS audit technique guide an approval of my study?
No. Publication 5653 is an examiner’s guide and expressly is not an official pronouncement of law or the Service’s position. Its methodology discussion is useful context, but the actual tax treatment depends on applicable law, records and the specific property. No vendor is automatically IRS approved by using it.
How to turn the answers into a return decision
Write down the property owner, affected tax year, the factual test being used and the evidence supporting it. Reconcile the amount on the study or workpaper with the return schedule, identify any limitation and assign the filing task to a named preparer. If a fact is missing, resolve it before treating the estimated deduction as usable.
Continue the planning sequence
Reviewed sources and scope
Reviewed November 8, 2026 by AE Tax Advisors. This is a federal planning resource; the facts, tax year, elections and state rules control the actual return. IRS publications explain rules but do not replace applicable law. The cost segregation audit guide is nonbinding examiner guidance and predates later bonus-depreciation changes.
Bring the facts to a scoped review
A study estimates asset classifications; a tax review determines eligible and currently usable deductions. Ask who reconciles basis, prepares any Form 3115 or amended return, and implements the final schedules. No tax saving or investment outcome is guaranteed.
Cost segregation service and scope · Documents checklist · Advisory pricing
Talk Through Your Situation
Discuss your priorities, upcoming decisions and whether a study or advisory engagement fits. Detailed analysis, implementation or filing work follows an agreed written scope.