Does Missed Rental Depreciation Require an Amendment or Form 3115?
A focused answer for business owners and rental-property owners.
The direct answer
The correction route depends on the error and whether an accounting method has been adopted. A one-return error and depreciation treatment used across multiple returns can require different procedures.
How to evaluate your situation
Reconstruct the asset schedule before choosing a filing route. Identify the service date, basis, method, life and deductions actually claimed. Distinguish an incorrect method from a mathematical or posting error. Form 3115 may be appropriate for an eligible accounting-method change, while an amended return may be appropriate in other situations. Automatic consent procedures have eligibility rules and designated change numbers that must be checked. The Section 481(a) calculation also must reconcile the old and new treatment. Do not simply write off every omitted amount on the current return without identifying the applicable procedure. Refund limitations and activity loss limits can affect the practical result.
Hypothetical example
An owner discovers an omission after filing one return; another owner has used incorrect depreciation on several returns. The preparer evaluates each history separately. Both situations concern depreciation, but that does not establish that the same form or correction year applies.
Records to gather
- All affected returns
- service dates
- basis records
- depreciation schedules
- method history
- prior changes
- deadlines
Related question
Can I choose an amendment just because it is cheaper?
The applicable tax procedure controls. Compare implementation costs only after identifying a permitted correction method and its eligibility requirements.
Source and next step
Updated September 30, 2026. This general federal tax discussion does not decide an individual filing position. Apply the current instructions for the actual tax year and your complete facts.
Review the related AE service and bring the listed records to a discovery call.
AE engagement pricing
$7,800 standard advisory engagement. No required recurring annual planning fee. Two $3,900 payments, 30 days apart. Returns, amendments, cost segregation and additional services are separately scoped. See published pricing for the service you need.
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