The question this page answers
What does source date documentation establish in this file, and what additional fact could change the next step? A report uses cost data that may reflect a different date or scope from the property project.
Build the chronology before choosing a reporting period
Record the date the underlying event occurred, the date it was documented and the date any payment was made. Keep these as separate columns in your working file. A date on a statement may represent processing rather than the underlying event.
Apply the check to the situation
An older rental has few invoices, and a provider develops an estimate using current cost information and documented adjustments.
For this check, identify the document that supports source date documentation. Compare it with estimate source identification before treating the two records as consistent. A difference may indicate separate events, incomplete history or a correction that has not yet reached every system.
Compare sources before accepting the result
Compare dated third-party evidence with internal records. If the dates differ, identify whether the difference reflects an actual change, delayed documentation or an error. Do not replace an inconvenient date with a preferred one.
Handle an incomplete or conflicting file
A later document can confirm an earlier event, but the reviewer needs to know what it actually establishes. Ask which event controls the decision and what evidence supports that conclusion.
| Evidence state | Action for this check |
|---|---|
| Supported and consistent | Record the source version and exactly what it establishes about source date documentation. Leave the tax conclusion to the responsible reviewer. |
| Missing | Request the underlying evidence and assign a follow-up owner. Identify whether the missing item prevents review or only delays implementation. |
| Conflicting | Keep both sources, describe the difference and request an explanation. Do not silently choose the source producing a preferred outcome. |
| Estimated | Explain the reconstruction method, uncertainty and reviewer approval required before using the estimate. |
| Proposed not applicable | Record why this question does not apply and obtain confirmation where the decision depends on that exclusion. |
The focused reviewer handoff
Submit the source reference, the finding about source date documentation, the unresolved difference and the requested decision. If the reviewer approves an action, ask what proves its completion. Continue with location adjustment rationale to check the connected part of the file.
Read the full cost segregation cost estimate source dates guide for the broader context and primary guidance.