Rental Conversion: The Placed-in-Service Date

For a rental conversion, the placed in service date is when your former home is ready and available for rental use—even if the first tenant arrives later. Moving out, advertising, signing a lease or collecting rent does not, by itself, establish that both conditions have been met. IRS Publication 527 explains the readiness rule.

This guide addresses U.S. federal depreciation for a whole former residence converted to a long-term, for-profit rental in 2026, with personal use ending. The cited 2025 IRS editions explain the continuing rules discussed here; they are not 2026 return-filing instructions. For broader planning, see decisions involved in keeping a home and single-family rental ownership.

Start by recording each conversion milestone separately. Your timeline should explain why the depreciation start date may differ from the dates in your moving receipts, advertisements and lease.

Hypothetical example: An owner moves out in July 2026 and prepares the house for rental. Its only bathroom needs plumbing work that prevents occupancy.

Applying the IRS readiness rule to these assumed facts points to August 21. The July move-out ended personal occupancy. The August advertisement began marketing while the bathroom remained unusable. The September lease and tenant arrival document later events. This is an illustration, not an IRS determination about a particular property. Publication 946's placed-in-service guidance supplies the underlying test.

If the required work finished on August 21 but the owner withheld the home from rental until September, the file would need to explain that later availability. Physical completion and availability deserve separate entries.

Build the supporting evidence as you prepare and market the rental. The following records are practical suggestions, not a universal IRS checklist:

• Condition: Keep dated photographs, contractor completion messages and a list of unfinished work. An invoice paid on August 21 might cover work completed earlier—or work still outstanding.
• Approvals: Ask the responsible local authority which rental, inspection or occupancy approvals apply to the property. Save any required approval and its effective date.
• Availability: Preserve listing versions, advertised move-in dates, showing records and instructions authorizing the manager to offer the house for occupancy.

For each unfinished item, describe how it affected rental use. An unusable bathroom and a planned decorative upgrade present different factual questions.

A listing screenshot documents what you offered to prospective tenants; pair it with evidence of the home's actual condition. If the ad said “available now” while a contractor reported that essential plumbing remained disconnected, retain both records and explain when the conflict was resolved.

A property manager can contribute a dated condition report and marketing history. Ask for the underlying facts, including any limitations on occupancy, so the tax preparer can evaluate the proposed start date.

The timeline establishes when depreciation begins. Determining the amount subject to depreciation requires a separate calculation: on conversion from personal use, the depreciable basis generally is the lower of fair market value or adjusted depreciable basis at conversion. Treasury Regulation § 1.168(i)-4(b) establishes that rule.

Prepare three supporting records:

1. Adjusted basis: Assemble the purchase closing statement, capital-improvement invoices and records of required basis reductions, including applicable credits or casualty adjustments.
2. Conversion-date value: Preserve a valuation addressing the property's condition and market value on that date. An appraisal can help document the estimate.
3. Land allocation: Document the building and land portions separately. Land is not depreciable.

Adjusted basis generally starts with acquisition cost and changes for qualifying additions and reductions. IRS Publication 551 explains basis adjustments and allocating a combined land-and-building purchase price.

Keep the acquisition history alongside the conversion-date valuation so the comparison can be reviewed. For the separate cash-planning question, see why depreciation and repair reserves serve different purposes.

Once the start date and basis are established, the depreciation calculation follows. Residential rental buildings generally use straight-line depreciation over 27.5 years under the General Depreciation System; different rules apply when the Alternative Depreciation System is required or elected. The building's mid-month convention gives half a month's depreciation for the month it enters service. Publication 946 explains these rules.

In the hypothetical timeline, a calendar-year owner keeping the house in rental use through December 31 would have 4.5 months in the first depreciation period: half of August plus September through December.

Keep August 21 in the factual timeline. The convention determines the calculation; it does not replace the actual readiness date with August 15 or make the August 4 advertisement decisive.

Establishing depreciation timing does not guarantee a currently usable deduction. Rental-loss limitations can affect whether the owner can use it in the current year. Publication 527's loss-limit discussion explains that separate question.

The initial conversion also differs from a later vacancy. Once an established rental is in service, depreciation continues during temporary idleness, including repairs after a tenant leaves—even while the property is temporarily unavailable for rent. Permanently withdrawing it from income-producing use, including converting it back to personal use, ends depreciation. These distinctions appear in Publication 527's guidance on idle property and retirement from service.

That later-vacancy rule does not establish an earlier start date for a former residence still being prepared for its first rental. Preserve the original conversion records alongside subsequent turnover records, and make the separate insurance checks while a rental is vacant.

Finish the conversion file with a short memo identifying the proposed date, the evidence supporting it and any unresolved discrepancy. Have a qualified tax professional review that file and the basis calculation before preparing the first rental return.