Direct answer: To convert a primary residence to a rental for federal tax purposes, establish when it became ready and available for rent, document fair market value and adjusted basis on that date, allocate land from building, begin depreciation using the lower conversion basis, and track rental income and expenses from the placed-in-service date. Also model the Section 121 home-sale exclusion before choosing the holding period. Moving out by itself does not start depreciation.
If your question runs in the other direction, you already own a rental and plan to move into it, see what happens when a rental becomes your home. Depreciation retirement and later-sale nonqualified-use rules are different from starting rental depreciation.
Step 1: Establish the placed-in-service date
The conversion date is normally when the home is ready and available for rent at a genuine market rent, not necessarily the move-out date, first lease date, or first payment. IRS Publication 527 gives an example in which a former home is placed in service when it is listed and available, even though the tenant moves in later.
Keep dated listings, photographs, property-manager agreements, rent-comparison support, permits, and records showing when pre-rental work ended. A token listing while personal use continues may not establish a rental placed-in-service date.
Step 2: Preserve adjusted basis and conversion-date value
For depreciation, property converted from personal to rental use generally uses the lower of adjusted basis or fair market value on the conversion date. Adjusted basis begins with cost and certain acquisition costs, adds capital improvements, and reflects required decreases. Fair market value is the price informed buyers and sellers would agree to under ordinary conditions.
Do not assume the lower conversion value replaces historical basis for every purpose. Converted property can require different basis tracks: depreciation uses the lower-of rule; gain on a later sale generally starts from adjusted historical basis as further adjusted; and a deductible-loss calculation can be limited by conversion-date fair market value. Preserve both schedules through disposition.
| Schedule | Purpose | Evidence |
|---|---|---|
| Adjusted basis | Historical investment and later gain analysis | Closing statement, improvement invoices, prior credits and casualty records |
| Conversion FMV | Lower-of depreciation test and potential loss limitation | Qualified appraisal or contemporaneous comparable sales |
| Land allocation | Excludes nondepreciable land from each relevant track | Appraisal allocation or supportable assessment ratio applied to actual basis |
Worked conversion-basis example
A homeowner has $480,000 of total adjusted basis after improvements. On the conversion date, a supportable appraisal values the property at $440,000, with 20% attributable to land. The building FMV is $352,000. If the adjusted building basis is $384,000, the starting building basis for depreciation is $352,000. The historical and FMV schedules must both be retained for the eventual gain-or-loss calculation; the $88,000 land value is not depreciated.
Step 3: Start depreciation by asset and convention
The residential rental building is generally depreciated over 27.5 years using straight line and the mid-month convention. Separately purchased appliances, furniture, and other assets may have shorter lives and different conventions. First-year depreciation depends on the placed-in-service month, not simply the number of full rental months.
A cost segregation study may identify shorter-lived components, but it does not make raw land or structural building costs bonus-eligible. Classification, acquisition history, personal use, current Section 168(k) law, state conformity, passive-loss limits, and future recapture determine value. Avoid assuming a fixed percentage of every converted home qualifies.
Step 4: Classify pre-rental work and later expenses
Once the home is ready and available for rent, ordinary and necessary expenses can include management, advertising, insurance, utilities paid by the owner, qualifying repairs, professional fees, taxes, and interest subject to their respective rules. Capital improvements are recovered through depreciation rather than deducted immediately.
Work completed before placement in service needs separate analysis. Replacing a roof, adding a bedroom, or renovating a kitchen does not become a current repair deduction merely because a tenant later moves in. Carrying costs, repairs, and improvements can follow different rules. The de minimis safe harbor is not a blanket permission to expense “improvements”; its requirements and unit-of-property rules still matter.
Step 5: Report rent, deposits, and personal use
Advance rent is generally income when received. A refundable security deposit is generally not income when received if it is intended to be returned, but an amount retained because the tenant breaches the lease may become income. If the owner, relatives, or guests use the property personally, vacation-home allocation and deduction limits may apply. Below-market family rent can also change the result.
Step 6: Determine whether rental losses are usable
Long-term rental activity is generally passive under Section 469. Losses are tested after basis and at-risk limits. The special allowance may permit up to $25,000 for an individual who actively participates, with phaseout generally beginning at $100,000 of modified adjusted gross income and ending at $150,000, subject to filing-status rules.
Otherwise, losses may be suspended until passive income exists or a qualifying taxable disposition occurs. Real estate professional status removes the per-se rental classification only when the statutory tests are met; the taxpayer must also materially participate. Model the usable deduction before paying to accelerate depreciation.
Step 7: Preserve the Section 121 sale window correctly
Section 121 can exclude up to $250,000 of qualifying gain, or up to $500,000 on certain joint returns, when the ownership and use tests are satisfied. A former homeowner who moves out and rents the home may still satisfy the two-years-out-of-five use test if the sale occurs soon enough.
Important correction: Rental use after the last date the property was used as the principal residence, within the five-year period ending on sale, is generally excluded from the statutory definition of nonqualified use. It is wrong to automatically allocate those post-move-out rental years as nonqualified-use gain. By contrast, rental use before the last principal-residence period can require allocation. In either sequence, gain attributable to depreciation allowed or allowable after May 6, 1997 is not excludable.
- Home first, rental second: Three residence years followed by two rental years can still satisfy the use test. The final rental period generally falls within the post-last-qualified-use exception, but depreciation remains taxable.
- Rental first, home second: Eight post-2008 rental years followed by two residence years can create nonqualified-use gain. Depreciation also remains outside the exclusion.
See AE’s rental-property sale strategy guide for the gain, recapture, loss, and exchange analysis.
Step 8: Compare sale, exchange, and hold scenarios
Compare after-tax cash flow with the opportunity cost of home equity. Model a sale while Section 121 may apply, a longer rental hold, and a possible 1031 exchange. A later sale can contain unrecaptured Section 1250 gain, Section 1245 recapture from shorter-lived assets, remaining Section 1231 gain, net investment income tax, and state tax.
Documents to preserve
- Purchase closing statement, original land allocation, and improvement invoices
- Conversion-date appraisal or comparable-sales file with land separated
- Dated listing, photographs, readiness records, lease, and first payment
- Mortgage, insurance, property-tax, licensing, and manager records
- Asset-by-asset depreciation schedule and any cost-segregation report
- Personal-use calendar, deposit ledger, rent receipts, and expense invoices
- Prior Forms 8582 and a timeline of principal-residence and rental use
Common conversion errors
- Starting depreciation on the move-out date before the property is available for rent
- Using FMV as depreciation basis when it exceeds adjusted basis
- Using the lower depreciation basis as the only schedule for a later sale
- Depreciating land or copying assessment dollars instead of applying a supportable ratio
- Deducting pre-rental improvements as repairs
- Ignoring personal use, below-market family rent, advance rent, or retained deposits
- Assuming accelerated depreciation automatically offsets W-2 income
- Treating every post-move-out rental year as Section 121 nonqualified use
Primary IRS sources
- IRS Publication 527, Residential Rental Property
- IRS Publication 523, Selling Your Home
- IRS Publication 551, Basis of Assets
- IRS Publication 946, How To Depreciate Property
Get the conversion-year return reviewed
Bring the acquisition closing statement, improvements, conversion-date valuation, listing history, depreciation schedule, and expected holding period. AE will map basis, the placed-in-service date, deduction limits, and exit consequences before the first rental return locks in errors.