Tax Rules for Converting a Primary Residence to Rental

When you turn your home into a rental, federal tax law reclassifies it from a personal asset to a business one, which opens up deductions for almost every operating cost but also imposes new rules on basis, depreciation, and how much gain you can eventually exclude when you sell. The tax rules for converting a primary residence to a rental property hinge on one date: the day you place the property in service as a rental. That date fixes your depreciable basis, starts the clock on the primary-residence gain exclusion, and determines when your first deductible expenses begin.

Setting Your Basis on the Conversion Date

The IRS uses a “lesser of” rule to set your depreciable basis. Your basis for depreciation is the lower of your adjusted cost basis or the property’s fair market value on the date it is placed in service as a rental.¹ Adjusted cost basis is what you originally paid, plus any capital improvements made while you lived there, minus casualty losses or energy credits already claimed.

If your home’s market value has dropped below your adjusted basis by the conversion date, you’re stuck using the lower value for depreciation. The gap between cost and current value never becomes a deductible loss. The rule exists to stop homeowners from converting paper losses on personal assets into business deductions.

There’s a second wrinkle when you eventually sell. If you sell at a loss, the IRS calculates that loss using the fair market value on the conversion date, not your original cost. If you sell at a gain, the IRS reverts to your original adjusted cost basis to calculate taxable profit.¹ You get the worse of both worlds for basis purposes.

Get a professional appraisal or a comparative market analysis on the date you place the property in service. That documentation anchors both your depreciation schedule and any future gain or loss calculation. Without it, the IRS can challenge whatever figure you use.

What You Can Deduct Once It’s a Rental

Ordinary operating costs become deductible: mortgage interest, property taxes, insurance, utilities you pay as landlord, property management fees, and professional services like tax preparation and legal advice. Routine repairs are fully deductible in the year you pay for them.

Capital improvements are treated differently. Work that adds value, extends useful life, or adapts the property to a new use must be capitalized and recovered through depreciation. A new roof or a kitchen renovation is a capital improvement. Fixing a leaky faucet or repainting a room is a repair. The distinction matters because capitalizing an expense that should be current delays the tax benefit by decades, while deducting a capital improvement in full invites an audit adjustment.

Depreciation Under MACRS

Residential rental property is depreciated over 27.5 years using the Modified Accelerated Cost Recovery System, with the mid-month convention.² Land is never depreciable, so you must allocate basis between the structure and the land. County tax assessments often provide a reasonable starting ratio.

The “placed in service” date is when the property is ready and available for rent, not the day a tenant actually moves in. If you finish repairs and list the property on July 5 but a tenant doesn’t sign until September, depreciation starts in July.¹ Getting this wrong shortchanges your first-year deduction.

Depreciation is a non-cash deduction. On a $300,000 structure, the annual deduction is roughly $10,909. It reduces taxable rental income without any out-of-pocket spending, but every dollar you claim (or could have claimed) will be recaptured as taxable income when you sell. It’s a deferral, not free money.

Whether Rental Losses Actually Reduce Your Tax Bill

Rental real estate is treated as a passive activity for most taxpayers, which means net losses can only offset other passive income, not your salary, wages, or investment earnings.³ If your rental generates a loss in the early years (common when depreciation is high) and you have no passive income to absorb it, the loss is suspended and carried forward.

When you eventually dispose of the property in a fully taxable sale, all accumulated suspended losses are released and deductible at once. For long-term holders, this can be a substantial deduction in the year of sale.

The $25,000 Active Participation Exception

If you actively participate in managing the rental (approving tenants, setting lease terms, authorizing repairs), you can deduct up to $25,000 in rental losses against non-passive income.³ Hiring a property manager is fine as long as you retain decision-making authority. You also need to own at least 10% of the property.

The $25,000 allowance phases out once adjusted gross income exceeds $100,000, shrinking by $1 for every $2 of AGI above the threshold. It disappears entirely at $150,000.³ Higher-income owners who miss this cutoff often find their rental losses trapped for years.

The Real Estate Professional Exception

A separate exception removes the passive activity classification entirely. If you qualify as a real estate professional, rental losses can offset any type of income without limit. The requirements are steep: more than 750 hours during the year in real property trades or businesses in which you materially participate, and more than half of all your working hours in those real estate activities.³ On a joint return, one spouse must satisfy both tests alone.

The exception is nearly impossible to meet if either spouse works full-time in a non-real-estate job. The IRS scrutinizes these claims closely, and contemporaneous time logs are essential to survive an audit.

The 20% Qualified Business Income Deduction

Rental income may qualify for a deduction equal to 20% of your net qualified business income from the property.⁴ On $30,000 in net rental income, that’s a potential $6,000 deduction, taken on your personal return without itemizing. The catch: your rental activity must rise to the level of a “trade or business,” which the statute doesn’t define for rental real estate.

The IRS addressed this with a safe harbor. If your rental enterprise meets all of the following, it qualifies automatically:⁵

250 hours of rental services per year (advertising, tenant screening, lease negotiation, rent collection, repairs and maintenance, supervision of contractors). For enterprises in existence at least four years, the threshold must be met in three of the five most recent tax years.
Separate books and records for each rental enterprise.
Contemporaneous written logs showing hours worked, services performed, dates, and who did the work.
A statement attached to your tax return for each year you rely on the safe harbor.

For 2026, the deduction begins to face limitations when taxable income exceeds $201,750 for single filers or $403,500 for joint filers. Above those thresholds, the deduction is gradually reduced based on a formula involving W-2 wages paid by the business and the cost basis of qualified property. Rental operations with no employees and fully depreciated property can see the deduction shrink substantially at higher income levels.

The 3.8% Net Investment Income Tax

Rental income, including both net operating income and gain from selling the property, can trigger an additional 3.8% tax on net investment income. This tax applies when your modified adjusted gross income exceeds $200,000 for single filers or $250,000 for joint filers.⁶ The tax is calculated on the lesser of net investment income or the amount by which MAGI exceeds the threshold.

Many owners converting a home to a rental don’t anticipate this surtax because they never paid it on wage income. Rental income from what used to be your break-even personal residence can push you over the threshold when stacked on your salary. Qualifying as a real estate professional can exempt rental income from this tax, but the IRS imposes an additional safe harbor requiring at least 500 hours of participation in the rental activity during the year, beyond the 750-hour real property test.

Selling Later: The Section 121 Clock

Converting your home to a rental doesn’t automatically forfeit the capital gains exclusion that lets you exclude up to $250,000 of profit ($500,000 for joint filers) when selling a primary residence.⁷ But it starts a countdown. You must have owned the home and used it as your primary residence for at least two of the five years before the sale. Once you’ve been out for more than three years, the use test is broken and the exclusion is lost.

Nonqualified Use Proration

For properties converted after 2008, gain allocated to periods of “nonqualified use” cannot be excluded.⁷ The rule is more favorable than most owners assume: the rental period that falls after your last day living in the home is not counted as nonqualified use.⁸ The nonqualified use rule primarily targets situations where you used the property for something other than a main home before living in it, such as buying it as a rental, living in it for two years, then selling.

For the typical conversion (live in the home first, then rent it out), the nonqualified use rules usually don’t reduce the exclusion at all, as long as you sell within the five-year window. The Publication 523 calculation divides the number of post-2008 days the property was not your main home (excluding any period after you last lived there) by the total days you owned it, then multiplies that fraction by your total gain to find the nonexcludable portion.⁸

Depreciation Recapture

Even if you qualify for the full Section 121 exclusion, you cannot exclude the portion of gain equal to depreciation claimed (or allowed to be claimed) during the rental period.⁹ This recaptured amount is taxed at a maximum federal rate of 25%, regardless of your regular bracket. If you depreciated $50,000 over five years of rental use, that $50,000 is taxed at up to 25% when you sell, even if the rest of the gain is excluded.

The word “allowable” matters. If you fail to claim depreciation during the rental years, the IRS still treats you as if you had. Skipping depreciation doesn’t reduce recapture liability; it just leaves money on the table.

Deferring Gain With a 1031 Exchange

Instead of selling and paying tax on the gain, you can defer it by exchanging into another investment property. The replacement property must be real property held for business or investment use, identified within 45 days of transferring the relinquished property, and the exchange must close within 180 days.¹⁰

For a converted residence, both benefits can potentially combine: use Section 121 to shelter up to $250,000 or $500,000 of gain tax-free, then defer the rest through a 1031 exchange. Revenue Procedure 2008-16 provides a safe harbor for treating a converted dwelling as investment property. To meet it, you must own the property for at least 24 months before the exchange, rent it at fair market value for 14 or more days in each of the two 12-month periods before the exchange, and limit personal use to no more than the greater of 14 days or 10% of rental days in each period.¹¹

The combination requires careful sequencing. You need enough rental time to satisfy the 1031 safe harbor while still selling inside the five-year Section 121 window. Getting the timing wrong can cost you one or both benefits.

Personal Use That Can Undo Rental Treatment

Occasional personal use of the converted property (a weekend visit, a holiday stay, hosting family) can affect your tax treatment. When personal use exceeds the greater of 14 days or 10% of the days the property is rented at fair market value, the IRS reclassifies the property as a “residence” rather than a pure rental.¹² Once that happens, rental expense deductions are limited to rental income; you can’t use the rental to generate a loss.

A proration rule applies whenever a property serves both personal and rental purposes: total expenses are divided between the two uses based on the number of days devoted to each.¹² Mortgage interest and property taxes allocated to personal use shift over to Schedule A as itemized deductions (subject to their own limits), while the rental-allocated portion goes on Schedule E.

Required Forms and Estimated Tax Payments

Rental income and expenses go on Schedule E (Supplemental Income and Loss), which feeds into Form 1040.¹³ Annual depreciation is calculated on Form 4562 and carried to Schedule E.¹⁴ If your rental produces a net loss, Form 8582 determines how much of that loss you can deduct under the passive activity rules, and it tracks any suspended losses carried forward.¹⁵

Quarterly Estimated Payments

Rental income isn’t subject to withholding, so you’ll likely need to make quarterly estimated tax payments to avoid an underpayment penalty. For 2026, the quarterly deadlines are April 15, June 15, September 15, and January 15, 2027.¹⁶ Penalties are avoided by paying at least 90% of current-year tax liability or 100% of prior-year tax through quarterly payments and withholding combined. If AGI exceeded $150,000 in the prior year, the safe harbor rises to 110% of prior-year tax.

Many first-time landlords miss this because taxes have always been handled through payroll withholding. If you convert mid-year, start making estimated payments for the quarter in which rental income begins.

Records Worth Keeping

Conversion creates documentation obligations that last for the entire time you own the property and beyond. At a minimum, retain:

The appraisal or CMA at conversion, which establishes fair market value for your depreciable basis and the dual-basis gain/loss rules.
Every capital improvement receipt from both the personal-use and rental periods, since improvements increase basis for gain calculations.
Move-in and move-out dates for you and every tenant. These dates drive the Section 121 use test, the nonqualified use calculation, and the personal use restrictions.
Contemporaneous time logs for rental activities, required for both the Section 199A safe harbor and any claim of real estate professional status.
All receipts, invoices, and statements supporting deductions on Schedule E.

Keep these records for at least three years after filing the return for the year you sell the property, not three years after the year you incur the expense. In practice, holding them for the entire ownership period plus the statute of limitations is the safest approach.

1
Internal Revenue Service. Publication 527 – Residential Rental Property
2
Office of the Law Revision Counsel. 26 U.S. Code 168 – Accelerated Cost Recovery System
3
Office of the Law Revision Counsel. 26 U.S. Code 469 – Passive Activity Losses and Credits Limited
4
Office of the Law Revision Counsel. 26 U.S. Code 199A – Qualified Business Income
5
Internal Revenue Service. Revenue Procedure 2019-38 – Rental Real Estate Safe Harbor for Section 199A
6
Office of the Law Revision Counsel. 26 U.S. Code 1411 – Imposition of Tax
7
Office of the Law Revision Counsel. 26 U.S. Code 121 – Exclusion of Gain From Sale of Principal Residence
8
Internal Revenue Service. Publication 523 – Selling Your Home
9
Internal Revenue Service. Sales, Trades, Exchanges – Depreciation Recapture
10
Office of the Law Revision Counsel. 26 U.S. Code 1031 – Exchange of Real Property Held for Productive Use or Investment
11
Internal Revenue Service. Revenue Procedure 2008-16 – Dwelling Unit Exchange Safe Harbor
12
Internal Revenue Service. Renting Residential and Vacation Property
13
Internal Revenue Service. About Schedule E (Form 1040), Supplemental Income and Loss
14
Internal Revenue Service. 2025 Instructions for Schedule E (Form 1040)
15
Internal Revenue Service. Instructions for Form 8582
16
Taxpayer Advocate Service. Making Estimated Payments