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Audit support includedFlat price for every study3 to 5 business days Residential rental property uses the mid-month depreciation convention for the building, generally with straight-line depreciation over 27.5 years under MACRS. For 2026, the key exception is not the building itself: separately classified furniture, equipment, and land improvements generally follow the half-year or mid-quarter convention instead. Land is not depreciable, and a short-term rental building can have a different recovery period while still using mid-month.
- Which depreciation convention is used for residential rental property? Mid-month applies to the building, not every asset.
- Long-term rental buildings generally use straight-line depreciation over 27.5 years under MACRS.
- Separately classified assets generally use half-year depreciation unless the mid-quarter test applies.
- Virtual Cost Segregation provides residential cost segregation studies; your CPA applies the classifications and conventions.
Why this matters
A rental house does not necessarily have one depreciation schedule. The building, furniture, and qualifying site improvements can carry different recovery periods and conventions, even when you acquire them together.
For residential owners reviewing Virtual Cost Segregation, the practical distinction is between identifying an asset and calculating its deduction. An engineering-based study supports classification; your CPA applies the tax rules to the resulting asset schedule.
Do not assign the building's mid-month convention to every item at the property. That shortcut can misstate first-year depreciation and obscure the separate mid-quarter test.
Which depreciation convention is used for residential rental property?
The mid-month convention applies to residential rental buildings under MACRS. Internal Revenue Code Section 168(d)(2) supplies the convention; IRS Publication 527 explains its application to residential rental depreciation. For a 2026 return, your CPA should apply those rules to the property's actual use and placed-in-service date.
Mid-month treats the building as placed in service halfway through the month, regardless of the actual day within that month. The same midpoint principle generally applies when you dispose of the building.
| Asset or situation | General recovery period under GDS | Depreciation convention | Practical limitation |
|---|---|---|---|
| Long-term residential rental building | 27.5 years | Mid-month | Land must be excluded from depreciable basis |
| Short-term rental building with transient use | Generally 39 years | Mid-month | Building classification depends on rental use |
| Qualifying rental furniture and appliances | Commonly 5 years | Half-year unless mid-quarter applies | Classification and business use require support |
| Qualifying land improvements | Generally 15 years | Half-year unless mid-quarter applies | Separate the improvement from land and building costs |
| Land | Not depreciable | None | A purchase-price allocation is still necessary |
These are general federal GDS rules, not a substitute for asset-level analysis. ADS requirements, elections, personal use, and other taxpayer-specific facts can change the calculation.
Mid-month: the rule for the rental building
The mid-month convention controls how much of the annual building deduction belongs in the first and final years. It does not shorten the building's recovery period or accelerate the entire purchase price.
For a calendar-year taxpayer placing a building in service during September 2026, mid-month generally allows 3.5 months of depreciation that year: half of September plus October, November, and December. A building placed in service in December generally receives 0.5 month.
The date within the month does not change that fraction. A building ready and available for rent early in September and one ready late in September both use the September midpoint.
The placed-in-service month matters more than the closing month. Buying a house does not begin depreciation while substantial work still prevents rental use.
Does a short-term rental still use mid-month?
A short-term rental building still uses mid-month even when its recovery period differs from a long-term rental building. For the transient short-term rental use discussed here, including average stays under 30 days, the building generally uses a 39-year recovery period rather than 27.5 years.
Do not confuse that building classification with the separate passive-activity rules. A rental house remains residential real estate in ordinary language, but its tax recovery period requires its own analysis.
Half-year: the general rule for qualifying separate assets
The half-year convention generally treats qualifying property as placed in service halfway through the tax year. It commonly applies to separately classified rental furniture, appliances, and land improvements unless the mid-quarter convention is required.
For a calendar-year taxpayer, half-year treatment ordinarily gives the same first-year time allowance whether an eligible asset enters service early or late in the year. That does not mean every asset receives the same deduction: recovery period, depreciation method, basis, and bonus depreciation treatment still matter.
A cost segregation study can identify assets with 5-, 7-, or 15-year recovery periods where their functions and documentation support those classifications. It does not make every item in a renovation eligible for a shorter life.
Keep the convention separate from the recovery period. A qualifying 5-year asset and a qualifying 15-year asset can both use half-year treatment while producing different annual depreciation amounts.
Mid-quarter: when late-year asset additions change the result
The mid-quarter convention generally applies when more than 40% of the relevant depreciable basis enters service during the final 3 months of the tax year. Your CPA must calculate the test across the applicable property, rather than looking only at one rental house.
IRS Publication 946 explains the test and its exclusions. Residential rental buildings and other property subject to mid-month are excluded; they do not become mid-quarter property because you bought them late in the year.
For a calendar-year taxpayer, the final quarter runs from October through December. When the test applies, affected property uses the midpoint of its placed-in-service quarter instead of the half-year assumption.
A late-year furnishing project therefore deserves review before filing. Adding several eligible assets near year-end can affect the convention for other applicable assets placed in service during that same year.
The benefit of an asset-level schedule is visibility. The limitation is that the study alone cannot resolve the test without the taxpayer's other relevant asset additions.
Why the depreciation convention varies across rental assets
Your property's street address does not determine every convention. These factors drive the treatment:
- Asset classification: The rental building uses mid-month; separately classified qualifying assets generally use half-year or mid-quarter.
- Rental use: Long-term residential use and transient short-term use can produce different building recovery periods, even though both buildings use mid-month.
- Placed-in-service timing: The month controls the building's first-year fraction, while the quarter matters for assets subject to mid-quarter.
- Year-end additions: The more-than-40% test considers applicable asset basis placed in service during the final 3 months.
- Taxpayer-wide records: Relevant additions outside the particular rental must be considered when applying the mid-quarter test.
- Disposition timing: Selling or retiring an asset requires the applicable convention in the final year as well.
These factors explain why copying a prior property's depreciation settings is unreliable. A matching purchase month does not establish a matching asset classification or convention.
How do you choose the correct convention before filing?
Use this sequence for a 2026 depreciation review. The purpose is to establish the tax treatment before entering a deduction, not to choose whichever convention gives the largest first-year amount.
- Separate land. Establish the nondepreciable land allocation before calculating building or component depreciation. Keep the allocation support with your closing records.
- Classify assets. Identify the building, qualifying personal property, and qualifying land improvements. Apply asset-specific facts rather than assigning one life to the entire purchase.
- Confirm timing. Document when each asset became ready and available for its intended rental use. A later-installed appliance can have a different service date from the house.
- Test conventions. Apply mid-month to the building and evaluate half-year versus mid-quarter for the applicable separate assets. Include the taxpayer's other relevant additions.
- Reconcile schedules. Check that asset allocations reconcile to supported depreciable basis and that the tax software reflects the approved classifications.
Your CPA then applies the appropriate entries and elections on Form 4562. The guide to how CPAs implement a cost segregation study on Form 4562 explains that implementation step in more detail.
Does bonus depreciation change the building's convention?
Bonus depreciation does not turn the rental building into short-life property. The building structure does not qualify for bonus depreciation and remains subject to mid-month treatment.
Eligible shorter-life property acquired and placed in service after January 19, 2025 can qualify for 100% bonus depreciation, subject to the applicable requirements. The acquisition and placed-in-service conditions both matter; a service date alone does not establish eligibility.
Conventions remain relevant when regular MACRS depreciation applies to remaining basis or when bonus depreciation is unavailable or elected out. Your CPA should determine bonus eligibility separately from the mid-quarter test and convention assignment.
For a home purchased before January 20, 2025 and converted to rental use later, conversion does not reset the acquisition date. That conversion does not qualify the property for the restored full bonus rate; confirm the applicable treatment with your CPA.
What if an older rental has the wrong depreciation schedule?
An existing rental requires a review of the original service date and prior depreciation, not a fresh start using the study delivery date. Ordering a study in 2026 does not make an older building newly placed in service.
A look-back cost segregation study can support an accounting-method change. Missed depreciation is claimed on the current return with Form 3115 through a Section 481(a) adjustment; prior returns are not amended for that look-back implementation.
Your CPA must distinguish an accounting-method change from an isolated error and apply the current filing requirements. Preserve prior schedules so the CPA can reconcile depreciation already claimed against the corrected treatment.
Virtual Cost Segregation's residential cost segregation studies are best for owners of 1 to 4 rental units who need engineering-based classifications for their CPA. The service supplies a supplementary report, not tax-return preparation, and the client's CPA applies it when filing.
FAQ
Which depreciation convention is used for residential rental property?
The mid-month convention applies to the residential rental building under MACRS. Separately classified qualifying assets generally use half-year or mid-quarter treatment instead.
Do I depreciate my rental building over 27.5 years or 39 years?
A long-term residential rental building generally uses 27.5 years under GDS, while a transient short-term rental building generally uses 39 years. Both use the mid-month convention; your CPA should confirm the classification from actual rental use.
Can I use half-year depreciation for the whole rental house?
No. The rental building uses mid-month, while qualifying separately classified furniture, equipment, and land improvements generally use half-year unless mid-quarter applies. Land is not depreciable.
Does buying a rental in December trigger the mid-quarter convention?
Buying the building in December does not make the building subject to mid-quarter. The more-than-40% test applies to relevant separate depreciable property placed in service during the final 3 months, with statutory exclusions.
Does depreciation start when I close or when a tenant moves in?
Depreciation starts when the property is ready and available for its intended rental use. Neither closing nor the first tenant's move-in date automatically establishes that date; retain evidence supporting rental readiness.
Does a cost segregation study let me choose my depreciation convention?
No. A study identifies supported asset classifications; tax rules determine the applicable convention. Virtual Cost Segregation supplies the residential study, and your CPA implements its findings on the return.
Does using mid-month mean I can deduct rental losses against my salary?
No. Mid-month determines depreciation timing, not whether a loss offsets salary. The short-term rental exception generally requires average guest stays of 7 days or less plus material participation; one common participation test requires more than 100 hours and more time than any other individual, including a manager.
One last thing
An empty rental can already be in service. If the property is ready and available for rent, waiting for the first booking does not necessarily delay depreciation.
For your 2026 records, keep dated listings, evidence that necessary work was complete, and separate installation records for later additions. Give your CPA the timeline alongside the asset schedule: a correct recovery period paired with the wrong service month still produces the wrong deduction.
This is general educational guidance. Apply current federal law to your facts with your CPA; state treatment and personal-use limitations require separate review.
