How Do Capital Improvements Affect a Property’s Tax Basis?
For rental property assets, depreciable basis is generally determined by starting with the owner’s investment in the property, adding certain capitalized costs, and then subtracting the portion of the purchase price allocated to land, since land is not a depreciable asset.
The remaining basis, including the building and certain qualifying improvements, is generally eligible for depreciation.
The IRS states that residential rental property is generally depreciated using the straight-line method and the mid-month convention, with a 27.5-year recovery period under MACRS GDS.
The basic formula is:
Depreciable basis = Purchase price + capitalized acquisition costs + capital improvements – land value
For example, assume an investor purchases a residential rental property for $500,000. Closing costs that must be capitalized, such as title fees, transfer taxes, and legal costs, total $12,000. Before placing the property in service, the owner spends $28,000 on improvements, including a new roof section and upgraded electrical work. The county assessment or appraisal allocates $150,000 of the total value to land.
The calculation would be:
$500,000 + $12,000 + $28,000 – $150,000 = $390,000
That $390,000 is the amount generally depreciated over the applicable recovery period. If the property is residential rental real estate depreciated over 27.5 years, the annual depreciation would be approximately:
$390,000 ÷ 27.5 = $14,181.82 per year
If the property is placed in service during the year, the first-year deduction is adjusted under the mid-month convention. For instance, if the property is placed in service in April 15, the owner generally receives depreciation for one-half of April plus the remaining months of the year. Small timing details matter here, which is why “placed in service” is not just tax vocabulary. It is the date the property is ready and available for rent, not necessarily the purchase date.
The rental property cost basis should also be revisited over time. Later capital improvements may need to be added and depreciated separately, while routine repairs may be deductible currently. This is where cost basis real estate records become more than a filing cabinet issue. They affect annual deductions, future gain calculations, and potential section 1250 recapture when the property is sold.
The One Big Beautiful Bill Act may also affect planning for certain real estate-related assets, but the building itself is still governed by the applicable depreciation rules. In other words, not every dollar spent on a rental property gets the same tax treatment. That would be convenient, but tax law has never been accused of being overly convenient.
Rental property depreciation allows an owner to recover the cost of income-producing property over time. To qualify, the taxpayer generally must own the property, use it in a trade or business or for income production, and depreciate an asset with a determinable useful life. Land does not qualify because it does not wear out in the same way a building, roof, HVAC system, appliance, or other physical asset does.
For residential rental property, MACRS typically requires straight-line depreciation over 27.5 years under the General Depreciation System. Certain property may instead be subject to the Alternative Depreciation System, which can produce a longer recovery period and smaller annual deductions.
Owners should also distinguish between the building and other assets. Appliances, carpeting, furniture, land improvements, and certain components may have different recovery periods. Bonus Depreciation can sometimes apply to qualifying shorter-lived assets, especially after a cost segregation analysis, but it generally does not apply to the residential building structure itself.
One common mistake is failing to separate land from the building. That can overstate depreciable basis real estate calculations and create problems later. Another is using the purchase date instead of the placed-in-service date. A property bought in March but not ready for rent until June generally begins depreciation in June, not March.
A second pitfall is confusing repairs with improvements. A repair keeps property in ordinary operating condition. An improvement betterments, restores, or adapts the property and usually must be capitalized and depreciated.
Owners also overlook depreciation recapture. When a rental property is sold, prior depreciation deductions can be taxed differently from the rest of the gain. Unrecaptured Section 1250 gain is generally taxed at a maximum federal rate of 25%, which can surprise owners who focused only on annual deductions and not the exit.
Good records are the difference between a clean calculation and a reconstruction project nobody asked for. Purchase documents, settlement statements, appraisals, improvement invoices, placed-in-service dates, and depreciation schedules should all be retained.
For more than four decades, Bennett Thrasher has provided businesses and individuals with strategic business guidance and solutions through professional tax, audit, advisory, and business process outsourcing services. Contact Rick Suid, Partner in Bennett Thrasher’s Financial Reporting & Assurance practice with extensive Real Estate industry experience, or call us at 770.396.2200.
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