Rental Property Depreciation Calculator
Separate nondepreciable land from a U.S. residential rental building, add entered capitalized acquisition and pre-service improvement costs, and estimate the 27.5-year straight-line deduction using the federal mid-month convention.
mid-month convention
Build the residential rental basis
Placed in service generally means ready and available for rent, not necessarily the purchase date, first tenant payment, or date a renovation check cleared. Later improvements normally form separate depreciation layers with their own dates and recovery treatment; do not combine them here unless they were part of the building basis when it first became ready and available.
Four rails from closing statement to deduction
1. Allocate land
Start with defensible evidence that separates the building from land. Land is not depreciable, even though it is part of the purchase price and may appreciate or decline.
2. Reconcile basis
Add only acquisition costs and pre-service capital work properly assigned to the rental building. Financing costs and escrow deposits do not automatically become building basis.
3. Establish service
Use the date the property was ready and available for rent. The federal mid-month convention treats service as beginning in the middle of that month.
4. Keep layers
Track later roof, HVAC, addition, appliance, furniture, and land-improvement projects separately. Different assets may have different class lives and conventions.
What this calculator computes
Purchase-price building allocation equals purchase price minus the entered land allocation. Preliminary building basis equals that building allocation plus entered capitalized acquisition costs and entered pre-service building improvements. Depreciable rental basis multiplies the preliminary amount by the rental business-use percentage. The calculator divides that basis by 330 recovery months, because 27.5 years multiplied by 12 months equals 330.
For the placed-in-service year, recovery months equal 12 minus the numbered service month plus one-half. An April placement therefore receives 8.5 months. Each later complete calendar year receives up to 12 months until the 330-month basis is exhausted. The result caps accumulated depreciation at the entered basis. It assumes no disposition, casualty, basis reduction, personal-use change, or additional asset layer.
Worked April 2024 example
A rental is purchased for $420,000. The supported land allocation is $80,000, leaving $340,000 assigned to the building from the purchase price. The owner identifies $12,000 of capitalized acquisition costs allocated to the building and completes $30,000 of building improvements before the property is ready for rent. With 100% rental business use, the modeled depreciable basis is $382,000.
The monthly straight-line recovery is $382,000 divided by 330, or about $1,157.58. An April placed-in-service month receives 8.5 months under this simplified mid-month calculation: half of April plus May through December. The 2024 estimate is therefore $9,839.39. A complete later tax year would have a $13,890.91 run rate, subject to the remaining recovery period and any later facts.
At the end of the selected first year, modeled accumulated depreciation is $9,839.39 and modeled unrecovered basis is $372,160.61. That remaining amount is not market equity and is not the adjusted basis for a sale unless every other basis adjustment is also included. It simply reconciles the original calculator layer less the calculated cost recovery.
Land allocation needs evidence, not a convenient percentage
The land portion cannot be depreciated. A county assessment may provide separate land and improvement values, but assessed values may not equal market value. A qualified appraisal, acquisition allocation, local assessment ratio, or other contemporaneous evidence may be relevant. Document the method and apply it consistently rather than choosing a land percentage solely to maximize a deduction.
The calculator asks for a dollar land allocation and displays its share of purchase price as a reasonableness check. It does not decide whether the evidence is sufficient. If the purchase includes multiple parcels, furniture, appliances, equipment, prepaid items, or a business, allocate consideration among assets before using a building-only schedule.
Closing costs do not all receive the same treatment
Potential basis items
Certain legal, recording, survey, transfer, title, and acquisition costs may be capitalized into property basis when they are attributable to acquiring the asset. Allocation between land and building still matters. Verify each closing statement line against current federal guidance.
Items that need another ledger
Loan points, lender charges, mortgage insurance, property-tax proration, prepaid interest, insurance escrow, repair expenses, and tenant-related costs can follow different timing and deduction rules. The label “closing cost” does not determine federal treatment.
Pre-service renovation
Work that places the building in usable condition may be capitalized. Betterments, restorations, and adaptations can also be improvements. The unit-of-property and safe-harbor rules require facts beyond an invoice total.
Later improvement layer
A later capital improvement generally starts its own recovery when placed in service. Do not backdate a roof, addition, or major system replacement into the original acquisition month merely because it is attached to the same building.
Ready and available is the timing hinge
A property may be purchased in January, renovated through March, advertised in April, and first occupied in May. The relevant placed-in-service inquiry is generally when it was ready and available for rent, based on the complete facts and documentation. A listing, property-management agreement, inspection, certificate, utility activation, photographs, and completion records can help establish the date.
Personal use before or after rental use, seasonal availability, conversion from a home, temporary withdrawal, and substantial rehabilitation can complicate the timeline. If a former residence becomes a rental, special basis rules may compare adjusted basis and fair market value at conversion. This calculator does not perform that comparison.
A deduction is not the same as immediate cash savings
Depreciation is an expense in the rental tax calculation, but its current cash-tax effect depends on taxable income, filing status, marginal rates, passive-activity rules, at-risk limits, material participation, other properties, carryovers, and state treatment. A loss reported on a schedule does not guarantee an equal reduction of current federal tax.
It does not import this depreciation, calculate passive losses, determine basis, or model a rental sale. Connect the final return position only after reconciling the actual tax forms.
Sale, exchange, and recapture require a new calculation
Adjusted basis for disposition usually begins with basis and reflects depreciation allowed or allowable plus other adjustments. Gain character can include unrecaptured section 1250 gain, ordinary recapture for certain property, capital gain, suspended passive losses, and state consequences. Market value minus the unrecovered amount displayed here is not a complete tax result.
A like-kind exchange can defer some gain when all requirements are satisfied, but receiving cash, non-like-kind property, or net debt relief can cause recognized gain. Related parties, personal residence use, installment treatment, qualified intermediary control, identification, and receipt deadlines deserve transaction-specific advice before documents are signed.
Build an audit-ready asset ledger
Keep the purchase agreement, settlement statement, appraisal or allocation evidence, assessment, invoices, contracts, permits, proof of payment, placed-in-service evidence, prior returns, depreciation schedules, casualty records, and disposition documents. Give each asset layer a description, cost, land allocation if relevant, business-use percentage, service date, recovery method, prior depreciation, and current status.
Reconcile the opening basis and accumulated depreciation to the prior-year return before adding the current amount. Tax software can carry an incorrect input consistently for years; consistency alone is not proof. Investigate duplicate assets, omitted improvements, land included in a building basis, and assets that were sold or retired but remain on the schedule.
Frequently asked questions
Why does the calculator use 27.5 years?
It is the federal GDS recovery period generally used for residential rental property in the cited IRS guidance. The property and election must actually fit that treatment; other asset classes and ADS can differ.
Can I depreciate the land?
No. Land is excluded from the calculator’s depreciable basis. Use documented support to allocate the purchase price rather than selecting a percentage only for tax effect.
What does mid-month mean?
For this residential rental illustration, property is treated as placed in service or disposed of in the middle of the relevant month. An April service date receives 8.5 recovery months in that first calendar year.
Should appliances be included with the building?
Not automatically. Appliances, furniture, land improvements, and other components may have different classification and recovery rules. Maintain separate asset layers and follow current guidance.
Does the result equal my tax savings?
No. It is an estimated deduction layer. Current tax savings depend on taxable income, tax rates, passive and at-risk limitations, carryovers, state rules, and the return as a whole.
Model limitation: This calculator estimates one U.S. residential rental building layer under a 27.5-year straight-line, mid-month approach. It does not determine asset classification, MACRS table percentages, ADS, cost-segregation treatment, bonus depreciation, listed-property rules, partial disposition, personal-use conversion basis, casualty adjustments, passive loss, state depreciation, or sale tax.
For a detailed federal recovery schedule after establishing depreciable basis, use the MACRS depreciation calculator.