Never Depreciated a Rental? Basis, Corrections & Sale Timing

By AE Tax Advisors · Published 2026-08-10

Updated November 8, 2026.

If you omitted rental depreciation, reconstruct the asset history before filing another return or reporting a sale. Depreciation allowed or allowable generally reduces tax basis even when you did not claim it. A correction may recover missed deductions, but the method, year and usable tax benefit depend on the facts.

Skipping the deduction does not preserve original basis

Start with the building's supported tax basis, excluding land, and its placed-in-service date. Adjust for capital improvements, dispositions and applicable depreciation. The allowed-or-allowable rule can reduce basis even when a return omitted depreciation. A later taxable sale may involve depreciation-related gain, but the character and rate depend on the assets and transaction; not every sale produces the same recapture result.

Choose the correction procedure before amending

Several years of consistent failure to depreciate can establish an impermissible accounting method. An eligible change to the proper method may use Form 3115 with a Section 481(a) adjustment. A single-year error, a mathematical mistake or a missed election may need a different approach. Do not assume that amending the last three returns is either sufficient or always prohibited.

The adjustment reconciles the prior method with the proper method through the beginning of the year of change. Current-year depreciation is computed separately. For a supported illustration, $90,000 of proper cumulative depreciation less $25,000 previously taken produces a $65,000 favorable difference. It does not establish a $65,000 refund, and the resulting loss may be limited or suspended.

Build a record that can be checked

• Closing statement and a defensible allocation between land and improvements.
• Acquisition, rental-ready and personal-use dates.
• All filed returns and depreciation schedules for the property.
• Invoices and service dates for later capital improvements.
• Evidence of prior bonus, Section 179 or other relevant elections.
• Sale or exchange documents if the property has been disposed of.

A cost segregation study may refine asset classes, but the calculation must use historical depreciation rules. Completing the study now does not restart an old property's acquisition date or grant today's bonus rate to every component.

A sale requires a specific procedural review

The automatic-change list includes provisions for certain disposed depreciable property. Some qualifying disposition-year corrections can follow special original-return, amended-return or partnership AAR procedures, subject to their conditions. A sale therefore does not automatically make correction impossible. Exchanges and other nonrecognition transactions have additional exclusions and exceptions.

Have the preparer identify the applicable provision and limitations period, then reconcile any change with adjusted basis and sale gain. Do this before submitting the sale-year return whenever possible; do not improvise a current-year deduction after the fact.

Plan the tax benefit separately from the deduction

Passive-activity, basis and at-risk rules can prevent an immediate offset against wages or business income. A qualifying disposition can affect suspended-loss treatment, but that is a separate calculation. Review federal and state carryforwards as well as the property ledger.

Use our Form 3115 filing guide and catch-up calculation guide for the next steps, or request a record review.

Frequently Asked Questions

Sources and update notes

Source references and the changes described in this guide were checked November 8, 2026. Published by AE Tax Advisors; see our editorial policy. Examples are illustrative and require review of your records before filing.

• IRS: Form 3115 and current guidance
• IRS: current filing locations
• Revenue Procedure 2025-23: automatic changes, as modified
• IRS Publication 946: depreciation