Document the property before and after the work. The invoice total alone does not determine whether an expenditure is deductible.
Start with the relevant property
Identify the owner, building and affected components before classifying an invoice. Building improvement analysis generally looks separately at the structure and specified systems, including HVAC, plumbing and electrical. Comparing a replacement with the cost of the entire property can miss the relevant question.
Build a simple property record: address, ownership entity, acquisition and service dates, affected system, equipment count and the areas served. For leased space, identify who owns the improvement and which portion of the premises is involved.
- What was present before the project?
- What was replaced, retained or added?
- Was the building operating, damaged, vacant or being converted to another use?
Ask three improvement questions
These are separate tests. A project can require capitalization even when it does not increase the property’s market value. Conversely, failing to qualify for a safe harbor does not by itself make a cost an improvement. The general rules still need to be applied.
| Question | Facts to collect |
|---|---|
| Betterment | Pre-existing defects, additions, capacity increases and changes in performance. |
| Restoration | Major components replaced, structural work, casualty facts, prior losses and the condition before work. |
| Adaptation | The original intended use and how the project changes that use. |
Separate the work without losing its context
Ask the contractor to distinguish inspection, patching, removal, replacement, new capacity and related finish work. Keep change orders with the original contract. Separating invoices can clarify the evidence, but it does not turn one integrated improvement into unrelated deductible jobs.
Give your CPA a decision file
Deliver a short project narrative alongside the invoices. Mark the facts that remain unknown instead of filling gaps with assumptions. Have the reviewer identify the applicable rule, conclusion, basis treatment and any election or filing action.
- Project scope and reason for the work.
- Before-and-after photos, plans and condition reports.
- Invoices, change orders and payment records.
- Prior depreciation schedules, retired components and prior study references.
- A list of open questions and the person responsible for resolving each one.
Sources & scope
Sources checked September 11, 2026. This educational material does not determine a particular property’s tax treatment. Have your CPA review the facts, applicable limitations and filing requirements.
Bring your property into the conversation.
Share the project, relevant tax years and available records so we can discuss the review scope.
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