Converting a primary residence into a rental property is one of the most common entry points into real estate investing. You already own the property, you understand the local market, and you may have significant equity. But the tax treatment of this conversion is more complex than most investors realize, and mistakes at the conversion point can cost thousands in lost deductions or unexpected tax liabilities at sale.
Step 1: Establish the Conversion Date
The conversion date is the day you place the property in service as a rental. Under Treasury Regulation Section 1.167(a)-11(e)(1), the placed-in-service date is when the property is ready and available for rental use. The property must be in suitable condition, actively marketed for rent, and not used as your personal residence. Document this date with photographs, rental listings, and property manager records.
Step 2: Determine Your Depreciable Basis
This is where most investors and their CPAs make errors. Under IRC Section 167(g), the depreciable basis of converted property is the lesser of adjusted basis (original cost plus improvements, minus casualty loss deductions) or fair market value (FMV) on the conversion date.
If you purchased your home for $400,000, made $50,000 in improvements, and it is now worth $350,000, your depreciable basis is $350,000 (the FMV). You cannot depreciate the $100,000 decline that occurred during personal use. Conversely, if the home appreciated to $600,000, your basis remains $450,000 (adjusted basis), because that is the lesser amount.
You must subtract land value from the depreciable basis, as land is not depreciable under IRC Section 167. Use the property tax assessment ratio or an independent appraisal for this allocation.
Step 3: Begin Depreciation
Residential rental property is depreciated over 27.5 years using the straight-line method under IRC Section 168(b)(3)(B) and the mid-month convention under IRC Section 168(d)(2)(B). For a $280,000 depreciable basis with an August conversion date, first-year depreciation equals approximately $3,819 (4.5 months of the $10,182 annual deduction).
Consider a cost segregation study at conversion. Reclassifying components (appliances, flooring, cabinetry, landscaping) into 5-year, 7-year, or 15-year categories qualifies them for bonus depreciation under IRC Section 168(k). On a $280,000 basis, a cost segregation study might reclassify $84,000 to $112,000 into accelerated categories, producing substantial first-year deductions.
Step 4: Plan for the IRC Section 121 Exclusion
IRC Section 121 allows you to exclude up to $250,000 of gain ($500,000 for married filing jointly) on the sale of your primary residence, provided you owned and used it as your principal residence for at least two of the five years preceding the sale.
When you convert to a rental, the clock starts ticking. You have a five-year window during which you can still sell and claim the exclusion. After five years, you no longer meet the use test.
For post-2008 conversions, IRC Section 121(b)(5)(C) provides that gain allocable to periods of nonqualified use (the rental period after December 31, 2008) is not eligible for the exclusion. If you owned the home for 10 years, lived in it for 6, and rented it for 4, then 40% of the gain is nonqualified and taxable. The longer you rent, the smaller the excludable percentage becomes.
Step 5: Track Rental Expenses from Day One
Once the property is placed in service, all ordinary and necessary expenses are deductible under IRC Section 162: property management fees, insurance, property taxes, mortgage interest (on Schedule E), repairs, utilities, advertising, and travel for management. Distinguish repairs (current-year deductions under IRC Section 162) from improvements (capitalized under IRC Section 263). The de minimis safe harbor under Treasury Regulation 1.263(a)-3(h) allows expensing improvements up to $2,500 per item for small taxpayers.
Step 6: Understand Passive Activity Implications
Rental income from an LTR is generally passive under IRC Section 469. If you are not a Real Estate Professional, your rental losses can only offset passive income. IRC Section 469(i) provides a limited exception: active participants can deduct up to $25,000 in rental losses against nonpassive income if MAGI is below $100,000, with a phase-out between $100,000 and $150,000. For most high-income investors, this allowance is fully phased out, and losses are suspended until you have passive income or dispose of the property.
Step 7: Plan the Exit Strategy Before You Convert
Consider whether you will sell within the five-year Section 121 window. Evaluate a 1031 exchange under IRC Section 1031 if you plan to sell after the exclusion expires. Model the depreciation recapture under IRC Section 1250 (taxed at up to 25%). And assess whether holding until death, which provides a stepped-up basis under IRC Section 1014, is a viable long-term strategy. Each exit path has dramatically different tax consequences.
Get Your Conversion Strategy Right the First Time
AE Tax Advisors helps real estate investors structure primary-to-rental conversions with precision, maximizing depreciation deductions, preserving the Section 121 exclusion window, and building a tax-efficient exit strategy from day one. Contact us at (631) 614-5762 or email team@aetaxadvisors.com to schedule a consultation before you convert.