Key takeaway: A rental depreciation file should explain the property’s basis, when it became available for rental use, every later asset change, and depreciation allowed or allowable. Keep the supporting history through the relevant period after disposition, and reconcile the schedule to the books and return each year.
This article is part of our guide to real estate and rental property accounting.
The annual deduction is only one output of a depreciation file. Years later, a preparer may need to explain an old land allocation, a replaced air-conditioning system, or an improvement paid for with refinancing proceeds. An organized file preserves those decisions and the documents behind them.
Separate basis from the depreciation deduction
Basis is the tax investment assigned to property; depreciation is a deduction calculated from the applicable depreciable basis. Purchased property generally starts with cost under Internal Revenue Code section 1012, subject to other rules and adjustments. It is not simply the current market value, the mortgage balance, or the owner’s cash down payment.
Determine the proper acquisition basis, classify acquisition costs, allocate between land and depreciable assets, and apply relevant adjustments. Then identify the depreciation system, class, method, convention, and service date. A 27.5-year recovery period describes qualifying residential rental property under the general depreciation system (GDS); it is not a universal life for every rental asset.
Illustrative purchase and first-year calculation
Assume a calendar-year taxpayer purchases a residential rental for $430,000 and pays $10,000 of properly capitalized acquisition costs, all allocable between the land and building. An acquisition-value analysis supports 25% land and 75% building. Assume entirely rental use, no other basis adjustments, and ordinary 27.5-year GDS straight-line treatment.
| Step | Illustrative calculation | Result |
|---|---|---|
| Total acquisition basis | $430,000 + $10,000 | $440,000 |
| Nondepreciable land | $440,000 × 25% | $110,000 |
| Building basis | $440,000 × 75% | $330,000 |
| Full-year straight-line deduction | $330,000 ÷ 27.5 | $12,000 |
| First year, placed in service July 10 | $12,000 × 5.5 ÷ 12, using the mid-month convention | $5,500 |
These are hypothetical figures using a direct straight-line calculation. $330,000 is the building basis; $12,000 is the full-year deduction. July placement provides half of July plus August through December in this example. The first year is not a full $12,000, and land receives no depreciation. Applicable tax worksheets and percentage-table rounding must be followed consistently.
IRS Publication 946 explains recovery periods and conventions. Keep the original depreciation inputs as well as the remaining adjusted basis; do not restart the calculation each year by dividing the declining year-end balance by 27.5.
See “Depreciation Records After a Major Rental Property Renovation” for more on Rental Renovation Depreciation Records.
Keep the acquisition documents that explain the basis
Save the purchase agreement, deed, final settlement statement or Closing Disclosure, acquisition appraisal, and the preparer’s basis worksheet. Link each capitalized closing item to its supporting line. Retain the allocation evidence itself, not just a typed percentage.
The IRS rental-property guidance and basis guidance distinguish property-acquisition costs from financing and operating items. Purchase-related legal, recording, transfer, and owner’s title-insurance costs can enter property basis. Lender’s title coverage and other loan costs require financing-cost analysis. Prepaid interest and loan fees are not automatically immediately deductible; mortgage points generally follow the loan term.
Also distinguish the buyer’s share of current property tax from a seller’s unpaid tax obligation assumed without reimbursement, which can enter basis. Escrow deposits for future taxes or insurance are not acquisition basis simply because they appear at closing.
Allocate a combined land-and-building cost using relative acquisition values. IRS guidance permits assessed-value allocation when fair market values are uncertain; retain the assessment and explain why it is appropriate. A remembered ratio or a current online estimate alone does not document the acquisition-date analysis.
Additional records for a gift, inheritance, or exchange
IRS Publication 551 explains why purchase-price basis is not universal. Gather the following when relevant:
| How property was obtained or used | Additional support to preserve |
|---|---|
| Inheritance | Date-of-death valuation, estate documents, and any applicable alternate or special valuation and Form 8971 Schedule A. Basis generally reflects the applicable inherited-property value, subject to exceptions. |
| Gift | Donor’s adjusted basis, depreciation history, gift-date value, transfer documents, and gift-tax information. Carryover and loss-basis rules require those separate figures. |
| Like-kind exchange | Old property’s basis and depreciation, both closing files, Form 8824, and the computation of replacement basis, including relevant cash, debt, costs, and recognized gain. |
| Personal property converted to rental use | Historical adjusted basis and conversion-date value, excluding land from depreciation. Depreciation basis generally uses the lower applicable amount; retain both for later disposition analysis. |
A new appraisal obtained for refinancing does not itself reset basis. Track refinancing proceeds and their use separately; qualifying improvements funded with those proceeds need their own cost records. Keep loan-cost amortization apart from property depreciation.
Maintain one asset history for each property
A practical register should connect the original building to later additions without losing the annual history. Use an asset ID and document reference, and retain these fields:
- Identification: property, unit or shared area, asset description, ownership, and rental-use percentage.
- Acquisition and use: purchase date, cost, allocation, actual service date, and documents supporting rental availability.
- Tax treatment: approved expense or capital classification, recovery method and convention, elections, and relevant basis adjustments.
- Annual history: opening basis, additions and disposals, current depreciation, accumulated depreciation, and ending adjusted basis.
- Disposition: date, manner of disposal, proceeds or other recovery, and the reviewed tax treatment.
Each field should answer a question a future reviewer could reasonably ask. A source reference such as “closing file, allocation worksheet, version 2” is more useful than “per last year.” Preserve the earlier version whenever a later review changes an amount.
Service begins when the asset is ready and available for its intended rental use, which can precede the first tenant’s move-in. Publication 946 also distinguishes temporary idleness from retirement. An existing property still held for rent does not automatically stop depreciating during a temporary vacancy or repair period. A never-ready pre-rental renovation presents different timing facts.
Document repairs, improvements, and replacements distinctly
Apply the betterment, restoration, and adaptation framework to the appropriate property and building systems. This is the regulatory analysis, not an optional label some preparers prefer. A kitchen, HVAC, or roofing invoice needs its actual scope and relevant surrounding facts. See the IRS tangible-property rules and safe harbors.
Keep contractor detail, payment evidence, permits, and completion records, then record the reviewed treatment. Costs directly benefiting or incurred because of an improvement can belong with that improvement; unrelated work performed at the same time does not automatically follow it. Eligible safe harbors and expensing provisions may change how a cost is recovered.
For appliances and furnishings, retain item-level identification even if a permitted grouping or expensing treatment means there is no separate annual depreciation line for each item. A receipt log and a tax depreciation schedule serve different purposes.
When property is removed, keep its history and document the disposal instead of erasing the row. Replacement of a building component can require partial-disposition analysis and a timely election under Treasury Regulation 1.168(i)-8. Do not assume that physically removing an old component automatically creates a deductible tax loss.
Reconcile depreciation allowed or allowable
Adjusted basis reflects depreciation allowed or allowable, rather than only the amount remembered or actually claimed. Internal Revenue Code section 1016(a)(2) supplies the basis-adjustment rule. Omitting a deduction does not necessarily preserve basis for a later sale.
Compare the filed returns, detailed asset schedules, and applicable depreciation calculations. List missing or excessive deductions with the affected years. Do not hide the difference by changing this year’s opening balance without an explanation. Publication 946 describes correction through an amended return or an accounting-method change, depending on the circumstances.
Reconcile the tax schedule to the bookkeeping asset register with an explicit adjustment list. Book depreciation can differ from tax depreciation; a bank reconciliation alone does not resolve that difference. Separately reconcile rent collections, expenses, deposits, and debt balances so tax inputs are supported by the underlying transactions.
Form 4562 is not the entire depreciation history
The Form 4562 instructions list when the form must be filed, including relevant new assets, listed property, section 179 claims, and other specified situations. Requirements also depend on return type. An individual rental return with only continuing depreciation does not necessarily include Form 4562 every year.
Keep a detailed annual schedule regardless. When changing preparers, request the full asset detail and election records in addition to the filed return. Use the instructions for the year being filed; an older form’s line numbers and year-specific amounts are not a substitute.
Use a retention rule that reaches beyond sale
The IRS record-retention guidance calls for property records through the applicable limitations period for the disposition return. Keep acquisition, improvement, depreciation, and sale support together for that period. Fully depreciated assets still need historical support.
Carryover-basis exchanges can extend the need for old-property documents through disposition of replacement property. Open matters, extended limitations periods, and nontax requirements can require longer retention. A firm or owner may adopt a longer retention policy, but “seven years after sale” is not a universal legal rule.
Apply the same decision to invoices linked from the register and to archived copies. Ordinary annual income and expense records follow their own applicable return periods; preserve them longer when they also establish basis or another continuing tax attribute.
Resolve missing records before finalizing the return
Request copies from the closing agent, contractor, lender, or prior preparer as applicable. Preserve replacement evidence with a note explaining what it establishes and what remains uncertain. County records can help with some allocation questions, but cannot replace every missing purchase or improvement fact.
Keep one unresolved-items list instead of repeating multiple checklists. Assign the question, requested evidence, reviewer, and deadline. At year end, compare the current register to last year’s schedule and account for each change. Before a sale, assemble the entire ownership and basis history with the proposed closing figures.
To discuss a depreciation-records review, contact CPA Firm South Florida. Bring the acquisition file, asset schedules, prior returns, and unresolved-items list, and confirm the engagement’s scope, timing, and fees.
Frequently asked questions
Does dividing by 27.5 calculate depreciable basis?
No. First establish the building’s tax basis, excluding land and accounting for applicable adjustments. Dividing an eligible residential building’s basis by 27.5 can illustrate a full-year straight-line deduction under GDS. First and last years require the applicable convention.
Must every rental return include Form 4562?
No. Filing requirements depend on the year’s assets, deductions, and return type. Keep a detailed depreciation schedule every year even when Form 4562 is not required.
What if prior depreciation was missed?
Preserve the filed returns and calculate what was allowable. Missing deductions can still affect adjusted basis. Have the correction procedure reviewed; it may involve an amended return or an accounting-method change.
Does every appliance need a separate depreciation deduction?
No. Keep enough detail to identify its cost, use, treatment, and disposal. Eligible expensing or a valid grouping method may apply, so an asset log does not mean every item must have a separate depreciating line.
Can I discard the file when I sell the rental?
No. Keep basis, depreciation, and sale support through the applicable limitations period for the disposition return. Carryover-basis transactions, open matters, and other requirements may require longer retention.