Commercial Real Estate Depreciation Schedule
A commercial real estate depreciation schedule shows commercial property owners how much value they are allowed to write off each year. The IRS requires you to deduct a building's cost over several decades instead of all at once.
This yearly deduction lowers your business's taxable income or rental income without requiring cash out of pocket. As a result, you keep more of your revenue and boost your overall cash flow.
How to Calculate Your Depreciable Basis Excluding Land
Your depreciable basis is the total purchase price of the commercial property minus the value of the land. The Internal Revenue Service does not allow land depreciation because land does not wear out or lose value over time.
You must divide your purchase price between the physical building and the land underneath it. Property tax cards, formal appraisals, or tax assessor records help set this ratio.
Making wild guesses on land values triggers IRS audits and costly penalties. Specialized real estate CPA services use official tax records and appraisal data to calculate your exact building basis. This prevents costly mistakes.
Rules for 39-Year Commercial Depreciation
Commercial buildings follow a standard 39-year recovery period set by the Internal Revenue Service. This rule applies to non-residential real estate property, such as office buildings, retail centers, and warehouses. Under the General Depreciation System (GDS), owners deduct equal amounts each year using straight-line depreciation.
The IRS tax clock does not start on your closing date. It starts when the property is placed in service (p. 6). This means it is fixed up, functional, and ready for use. If you buy a building in January but spend six months fixing it up, your 39-year schedule starts in July.
The IRS Mid-Month Convention
The Internal Revenue Service uses a mid-month rule for commercial real estate. This rule assumes your building is placed in service in the middle of whichever month it is ready and available for use, no matter the exact day of that month.
This rule splits your first-year write-off based on the remaining months in the year. Placing a building in service in July gives you 5.5 months of write-offs for year one. The leftover half-month balance is claimed in year 40 when the schedule finishes.
Standard Depreciation vs Cost Segregation Acceleration
A cost segregation study breaks down a commercial property into separate parts to speed up tax write-offs. Instead of depreciating the whole building over 39 years, studies are used to split specific assets into 5-year, 15-year, or 39-year recovery buckets.
Personal property such as carpeting, security systems, and decorative lighting qualify for the 5-year bucket. Site improvements including parking lots, sidewalks, and fences fall in the 15-year bucket. Interior updates also count as 15-year Qualified Improvement Property (QIP).
Under the One Big Beautiful Bill Act, eligible 5-year, 15-year, and QIP items qualify for 100 percent bonus depreciation. When you combine bonus depreciation with proactive real estate investment tax planning, it allows you to claim large upfront tax write-offs and maximize immediate cash flow.
Estimator to Calculate Your Annual Real Estate Depreciation
Estimate your basic annual tax deduction for real estate depreciation using four simple numbers: total purchase price, land value, opening month, and the 39-year period.
Calculation Step | What to Enter / Formula |
1. Purchase Price | Total contract purchase price |
2. Subtract Land Value | Estimated land value |
3. Depreciable Building Basis | Purchase Price − Land Value |
4. Full Annual Depreciation | Building Basis ÷ 39 Years |
5. Year 1 Prorated Deduction | (Annual Amount ÷ 12) × Placed-in-Service Months |
Commercial Real Estate Depreciation Calculation Examples
Applying the 39-year straight-line rate and mid-month rule to a $2 million commercial purchase shows how land ratios and opening months change first-year write-offs.
Scenario ($2M Purchase) | Land Value Allocated | Depreciable Basis | Placed in Service | First-Year Write-Off | Full Annual Write-Off |
High Land Value (30%) | $600,000 | $1,400,000 | October (2.5 mos) | $7,479 | $35,897 |
Standard Allocation (20%) | $400,000 | $1,600,000 | July | $18,803 | $41,026 |
Low Land Value (10%) | $200,000 | $1,800,000 | March (9.5 mos) | $36,538 | $46,154 |
Cost segregation changes these numbers fast. Shifting 20 percent of the $1,600,000 standard building basis ($320,000) into 5-year items changes your initial cash flow.
$2M Purchase (Standard Allocation, July Closing) | 39-Year Building Basis | 5-Year Asset Basis | First-Year Write-Off |
Schedule With 20% Cost Segregation | $1,280,000 | $320,000 | $335,043 |
Writing Off Retired Assets (Partial Dispositions)
When you replace major building parts such as putting in a new roof or HVAC system, you do not have to keep deducting the old, discarded parts.
Under Treasury Regulation 1.168(i)-8, commercial property owners are allowed to claim a partial disposition deduction. This rule lets you write off the leftover basis of the old removed part right away in the year you replace it.
Understanding Depreciation Recapture Tax Upon Sale
Depreciation recapture is a tax you pay when selling commercial property for a profit. The Internal Revenue Service taxes past depreciation write-offs you claimed or were allowed to claim over the time you owned the building.
Commercial real estate recapture breaks down into three tax rates:
39-Year Building Structure (Section 1250): Standard building depreciation is taxed up to a maximum federal rate of 25 percent.
Accelerated Cost Segregation Assets (Section 1245): Short-life items like carpets or fences are recaptured at higher ordinary income rates up to 37 percent.
Profit Beyond Purchase Price:Profit above your original purchase price is taxed at capital gains rates on investment property.
IRS Publication 946 guidelines state recapture applies to all eligible deductions, even if you forgot to claim them on your tax returns (Form 946, p. 12). However, you can defer paying recapture and capital gains taxes by rolling your sale proceeds into a new commercial building through a 1031 exchange.
Claiming Missed Prior Depreciation
If you didn’t claim commercial real estate depreciation in past years, you do not need to amend old tax returns. Filing IRS Form 3115 (Change in Accounting Method) allows you to claim all missed write-offs in a single catch-up deduction on your current year return.
Section 163(j) Business Interest Limitations and Real Estate Businesses
If you are leveraged in your commercial real estate business and pay large amounts of interest expense annually, you may need to consider the interplay between Section 163(j) and depreciation.
Section 163(j)(7) allows a real property trade or business to elect out of the business interest expense limitation rules. In exchange, the electing business must depreciate its nonresidential real property and qualified improvement property under the Alternative Depreciation System (ADS), which uses longer recovery periods and therefore lowers the annual depreciation deduction. The trade-off is a smaller depreciation deduction each year in return for deducting business interest expense in full.
The election is irrevocable, and because property depreciated under ADS is not eligible for bonus depreciation, it can reduce the benefit of a cost segregation study. The timing of acquisitions, refinancing, and cost segregation studies should be discussed with your tax professionals.
Put Your Real Estate Depreciation Strategy to Work
Commercial real estate depreciation works best as a smart tax plan instead of a simple end-of-year task. Property owners keep more of their cash when they use standard 39-year write-offs alongside cost segregation and retired asset deductions.
Annual tax write-offs lower your building value on paper and shape the taxes you owe when you sell. Smart real estate investors protect their cash and avoid surprises by keeping clear property files and working with tax professionals.