The length and complexity of the regulations prohibit a full analysis. Some of the highlights are:
- New rules are set forth for deducting or capitalizing materials and supplies.
- Several methods of accounting are provided for rotable and temporary spare parts.
- Rules are provided for moving and reinstalling property.
- To determine whether a cost incurred for property is an "improvement" requiring capitalization, it is necessary to refer to what is called a "unit of property." A "unit of property" is somewhat subjective as demonstrated by numerous examples in the regulations. Generally, the larger the unit of property the more likely the cost can be deducted as a repair.
- For buildings, the IRS has identified eight component systems as "units of property" making improvements to these components (e.g., HVAC, plumbing, electricity, elevators, etc.) more likely to be capital expenditures (requiring lengthy depreciation) rather than repairs (permitting current deductions).
- Leasehold improvements are a separate unit of property.
- For machinery and equipment, a unit of property is one that performs a discrete and major function or operation.
- While a "unit of property" is considered in accounting for repairs or improvements, the concept is not used for purposes of determining the property's depreciation period.
- Improvements are required to be capitalized. An improvement means that a unit of property has been bettered. For example, a material defect prior to acquisition has been fixed, a material addition has been added, capacity has been increased, the unit of property has been restored, or the unit of property has been adapted to a new or different use.
- Routine maintenance such as cleaning, testing, and reasonable replacement of parts is not considered an improvement and may be deducted as a repair.
- The retirement of a structural component of a building may now be treated as a disposition separate from the overall building and a loss claimed for the adjusted tax basis.