Rental Property Depreciation Calculator

The IRS assigns different recovery periods to different types of real property based on their classification under the Modified Accelerated Cost Recovery System (MACRS). The two most common schedules for rental investors are 27.5 years for residential and 39 years for commercial.

Residential rental property (27.5 years):

• Applies to buildings where 80% or more of the gross rental income comes from dwelling units (apartments, houses, duplexes, condos rented to tenants).
• Produces a higher annual deduction because the same basis is spread over fewer years. A $240,000 residential building generates $8,727/year vs. $6,154/year for commercial.
• Also includes manufactured homes, mobile homes, and residential components of mixed-use buildings if the 80% threshold is met.

Commercial property (39 years):

• Applies to office buildings, retail spaces, warehouses, restaurants, and any building that does not meet the 80% residential threshold.
• Produces a lower annual deduction because the basis is spread over 39 years instead of 27.5. This makes cost segregation studies even more valuable for commercial properties.
• Mixed-use buildings (e.g., retail on the ground floor with apartments above) fall into the 39-year category unless 80%+ of income comes from residential units.

Practical impact: On a $240,000 depreciable basis at a 32% tax rate, the residential schedule saves you $2,793/year in taxes while the commercial schedule saves only $1,969/year. Over 10 years, that gap adds up to $8,240 in additional tax savings for residential classification. This is one reason residential rentals are so popular with individual investors — the faster depreciation schedule improves after-tax cash flow.

The mid-month convention is an IRS rule that determines how much depreciation you can claim in the year you place a rental property in service (and the year you dispose of it). Regardless of the actual day of the month you close on the property, the IRS treats it as if you placed it in service at the midpoint of that month.

How the calculation works:

• Months of service in the first year = 12 minus the purchase month plus 0.5. For example, a June purchase gives you 12 - 6 + 0.5 = 6.5 months of depreciation.
• First-year deduction = Annual depreciation amount multiplied by (months of service / 12). If your annual depreciation is $8,727 and you have 6.5 months, the first-year deduction is $8,727 × (6.5 / 12) = $4,727.
• The last year of depreciation gets the remaining fraction. If you started with 6.5 months in year 1, the final year gets 5.5 months of depreciation.

Why the purchase month matters:

• January purchase: 11.5 months of depreciation in year 1 (95.8% of a full year). This maximizes your first-year deduction.
• July purchase: 5.5 months (45.8% of a full year). You lose about half the first year's benefit.
• December purchase: Only 0.5 months (4.2% of a full year). Your first-year deduction is minimal, but you get a correspondingly larger deduction in the final year.

Total depreciation is the same: The mid-month convention does not change the total amount you depreciate — it only shifts timing. A January purchase and a December purchase both result in the same total deductions over the full recovery period. However, the time value of money makes earlier deductions more valuable, so closing earlier in the year is slightly better from a tax perspective.

Cost segregation is a tax strategy that accelerates depreciation deductions by reclassifying certain components of a building into shorter-life property categories. Instead of depreciating 100% of the building over 27.5 or 39 years, a cost segregation study identifies components that qualify for 5-year, 7-year, or 15-year recovery periods — dramatically increasing your deductions in the early years of ownership.

How cost segregation works:

• 5-year property (personal property) — Carpeting, appliances, window treatments, decorative lighting, removable cabinetry, and certain electrical outlets. Typically 10-20% of the depreciable basis.
• 7-year property (certain fixtures) — Specialized furniture, specific types of office equipment, and other tangible personal property. Typically 5-15% of the basis.
• 15-year property (land improvements) — Parking lots, sidewalks, landscaping, fencing, drainage systems, and outdoor lighting. Typically 5-15% of the basis.
• Building structure (27.5 or 39 years) — The remaining structural components continue to be depreciated over the full recovery period.

The financial impact is significant: Consider a $300,000 residential property with $240,000 depreciable basis. Standard depreciation gives you $8,727/year. With cost segregation allocating 35% to shorter-life property, your first-year deduction could be $25,000-$40,000 or more, depending on bonus depreciation rules.

When cost segregation makes sense:

• Properties with a depreciable basis over $200,000 (the study cost of $5,000-$15,000 needs to be justified by tax savings)
• Investors in higher tax brackets (more tax savings per dollar of accelerated depreciation)
• Properties you plan to hold for at least 5-7 years (to capture the full benefit of the accelerated deductions)
• Newly purchased, renovated, or newly constructed properties (the study is most effective when done at acquisition or after major improvements)

Important caveat: Cost segregation does not create additional deductions — it accelerates them. You take bigger deductions now and smaller ones later. The total depreciation over the building's life is the same. The advantage is the time value of money: a dollar of tax savings today is worth more than a dollar of tax savings 20 years from now.

Depreciation recapture is the IRS mechanism that claws back some of the tax benefit you received from depreciation when you sell a rental property at a gain. It is one of the most misunderstood aspects of real estate taxation — and failing to plan for it can result in a nasty surprise at closing.

How recapture works:

• When you sell, the IRS separates your gain into two parts: the portion attributable to depreciation you claimed (or should have claimed), and the remaining capital gain.
• Depreciation recapture is taxed at a maximum federal rate of 25% under Section 1250. This is higher than the long-term capital gains rate of 15-20% but lower than ordinary income rates for most investors.
• The remaining gain (appreciation above your original purchase price) is taxed at the standard long-term capital gains rate of 0%, 15%, or 20% depending on your income.

Example: You bought a property for $300,000 and claimed $100,000 in depreciation over the years, reducing your adjusted basis to $200,000. You sell for $400,000. Your total gain is $200,000, of which $100,000 is depreciation recapture (taxed at up to 25%) and $100,000 is capital gain (taxed at 15-20%).

Critical point: The IRS recaptures depreciation whether or not you actually claimed the deductions. If you failed to take depreciation on your tax returns, you still owe recapture tax on the amount you were allowed to deduct. This is why it never makes sense to skip depreciation — you pay the recapture either way, so you might as well take the annual benefit.

Avoiding recapture: The most common strategy to defer depreciation recapture is a 1031 exchange, which lets you roll the gain (including recaptured depreciation) into a replacement property of equal or greater value. The recapture tax is deferred until you eventually sell without exchanging — or eliminated entirely if you hold until death and your heirs receive a stepped-up basis.

Accurately allocating between land and building value is critical because land cannot be depreciated. Overestimating the building value inflates your deductions and can trigger IRS scrutiny. Underestimating it means you leave legitimate tax savings on the table.

Common methods for determining land value:

• Property tax assessment — Most counties separately assess land and improvements on your property tax bill. Calculate the land percentage from the assessment (e.g., if the county values land at $60,000 and improvements at $240,000, land is 20%). This is the most commonly used method and is generally accepted by the IRS.
• Professional appraisal — A licensed appraiser can provide a formal allocation. This is the gold standard and most defensible if audited, but costs $300-$500+.
• Comparable sales — Look at recent sales of vacant lots in the same area to estimate raw land value, then subtract that from your purchase price to derive the building value.
• Closing statement or settlement sheet — Sometimes the purchase contract or HUD-1 statement includes a land/building breakdown, especially in new construction.

Typical land value percentages:

• Urban/high-demand areas: 30-50% of total value (San Francisco, Manhattan, coastal markets)
• Suburban areas: 15-30% of total value
• Rural areas: 10-20% of total value
• Condos: Often 10-15% since you own a fraction of the land

Best practice: Use the county tax assessment ratio as your starting point. It provides a reasonable, documented basis for the allocation. If you believe the county significantly overvalues the land (or undervalues the building), get a professional appraisal and keep it in your tax records. Consistency and documentation are key — the IRS cares more about whether you can defend your allocation than which specific method you used.

Bonus depreciation (also called first-year expensing or the 100% deduction) is a federal tax provision that allows you to immediately deduct a large percentage of the cost of qualifying assets in the year they are placed in service, rather than depreciating them over their MACRS recovery period.

Current bonus depreciation rules (phasedown):

• 2022: 100% bonus depreciation
• 2023: 80% bonus depreciation
• 2024: 60% bonus depreciation
• 2025: 40% bonus depreciation
• 2026: 20% bonus depreciation
• 2027 and beyond: 0% bonus depreciation (unless Congress extends it)

How it interacts with cost segregation: Bonus depreciation applies to the 5-year, 7-year, and 15-year property classes identified in a cost segregation study — but not to the 27.5-year or 39-year building structure. This is what makes cost segregation so powerful when combined with bonus depreciation.

Example: You buy a $500,000 residential property with $400,000 depreciable basis. A cost segregation study reclassifies 35% ($140,000) into shorter-life categories. With 60% bonus depreciation (2024), you could deduct $84,000 (60% of $140,000) in year one, plus the pro-rata depreciation on the remaining building and short-life balances. Compare that to $14,545/year with standard straight-line.

Key considerations:

• Bonus depreciation is being phased out. If you are considering a cost segregation study, acting sooner captures a higher bonus rate.
• The massive first-year deduction from bonus depreciation can create a tax loss on the property, which may be limited by passive activity loss rules unless you qualify as a real estate professional.
• Congress may restore 100% bonus depreciation — watch for tax law changes. Several bills have been introduced to make it permanent or restore the full deduction.

Note: This calculator uses straight-line depreciation for all cost segregation classes to provide a conservative estimate. Actual results with MACRS accelerated methods and bonus depreciation would produce even larger first-year deductions. Consult a CPA for precise calculations.

A 1031 exchange (also called a like-kind exchange or Starker exchange) is one of the most powerful tax-deferral strategies in real estate — and it has a direct impact on how depreciation works for both the property you sell and the property you acquire.

How 1031 exchanges defer depreciation recapture:

• When you sell a rental property, you normally owe depreciation recapture tax (up to 25%) plus capital gains tax. A 1031 exchange defers both taxes by rolling the gain into a replacement property.
• The accumulated depreciation from the relinquished property carries over to the replacement property. Your new depreciable basis is reduced by the deferred gain.
• You continue depreciating the carryover basis on the same schedule, and begin a new depreciation schedule on any additional basis (if you traded up to a more expensive property).

Example: You bought Property A for $300,000, claimed $100,000 in depreciation (adjusted basis $200,000), and exchange it for Property B worth $500,000. Your basis in Property B is calculated as $500,000 minus the $200,000 deferred gain = $300,000 starting basis. The additional $200,000 you paid (boot) creates new depreciable basis that starts a fresh 27.5-year schedule.

The ultimate depreciation strategy: Serial 1031 exchanges let you defer recapture indefinitely. Many investors exchange properties every 5-10 years, deferring all gains and recapture. Upon death, heirs receive a stepped-up basis, permanently eliminating the deferred depreciation recapture and capital gains tax. This strategy — sometimes called "swap till you drop" — can save hundreds of thousands in taxes over a lifetime of real estate investing.

1031 exchange requirements: The replacement property must be identified within 45 days of closing on the relinquished property and acquired within 180 days. The exchange must be facilitated by a qualified intermediary, and you cannot take constructive receipt of the sale proceeds. Consult a tax professional and 1031 intermediary before attempting an exchange.