The Short Answer

1. When does a home become a rental property for tax purposes?

For tax purposes, the important date is not necessarily the day the first tenant moves in.

For depreciation purposes, converting the property to rental or other income-producing use is treated as the placed-in-service event. In practical terms, that generally means the property must be ready and available for rent—not necessarily already occupied by a tenant.

Suppose you move out in August, finish preparing the house, and make it available for rent on September 1. A tenant signs a lease later in September and moves in October.

September 1 may be the relevant placed-in-service date because that is when the property became available to produce rental income.

That date matters because it affects when depreciation begins and when expenses start being treated as rental expenses.

In Closer, Evan and Daisy move to Irvine, prepare the Anaheim house, and list it for rent in early September. The fact that the eventual tenants may move in later does not necessarily postpone the beginning of the rental period.

The IRS discusses this timing in Publication 527, Residential Rental Property.

2. What happens to expenses in the year you move out?

A conversion year usually contains two different periods:

Before conversion → personal residence

After conversion → rental property

Yearly expenses such as property taxes and insurance may therefore need to be divided between the two periods.

For example, if a calendar-year taxpayer moves out and converts the property to rental use during the year, only the portion attributable to the rental period is generally treated as a rental expense.

Mortgage interest and property taxes attributable to the earlier personal-use period may still receive whatever personal deduction treatment is otherwise available under the rules applicable to that year.

Depreciation is different. You cannot depreciate the house for the period it was held for personal use. Depreciation begins once the property is placed in service as a rental.

3. Your depreciation basis may not be the same as your original cost

This is one of the most important rules when a former home becomes a rental.

For depreciation, the starting basis is generally the lower of:

• the property’s adjusted basis on the conversion date, or
• its fair market value on the conversion date.

Adjusted basis generally begins with the property’s original tax basis and is then adjusted for items such as qualifying capital improvements and certain other basis adjustments.

The comparison must also account for the fact that land is not depreciable.

For a simplified example, assume the following amounts are attributable to the building after separating the value of the land:

Building basis before improvements: $600,000
Capital improvements: $30,000
Adjusted building basis at conversion: $630,000
Building fair market value at conversion: $700,000

The starting depreciation basis would generally be $630,000 because adjusted basis is lower than fair market value.

Now consider a declining market:

Adjusted building basis at conversion: $630,000
Building fair market value at conversion: $560,000

The starting depreciation basis would generally be $560,000.

That lower-of rule prevents a taxpayer from creating depreciation deductions from a personal decline in value that occurred before the property became an income-producing asset.

One important limitation: this lower-of rule determines the basis for depreciation after conversion. It should not automatically be treated as the basis used to calculate gain on a later sale. Different basis rules can apply when a converted personal residence is eventually sold, particularly when determining a loss.

IRS Publication 527 explains the depreciation-basis rule for property changed from personal to rental use.

4. Land is not depreciable

The entire property basis does not become depreciable when a home becomes a rental.

Land is not depreciated.

The basis attributable to the building must therefore be separated from the basis attributable to land.

For residential rental real estate placed in service under the general MACRS rules, the building is generally depreciated over 27.5 years using the applicable residential-rental-property method and convention.

This is another reason the records from the original home purchase still matter after conversion.

The conversion does not erase the original basis history.

5. Repairs and improvements still need to be distinguished

Once the house becomes a rental, ordinary and necessary rental expenses may generally be deductible under the applicable rental rules.

But not every check written for the property becomes an immediate deduction.

A repair that keeps the property in ordinarily efficient operating condition may generally be currently deductible.

A capital improvement generally must be capitalized and recovered through depreciation rather than deducted immediately.

That distinction already mattered while the property was Evan and Daisy’s home because improvements could affect basis.

After conversion, it matters in another way: it can determine whether an expenditure produces a current rental deduction or a capitalized asset recovered over time.

The same receipt can therefore become important for a different reason once the property changes use.

6. Negative cash flow and a tax loss are not the same thing

This distinction matters in Closer.

Evan estimates that the Anaheim property may cost them more than $1,000 per month after mortgage payments, property taxes, insurance, PMI, repairs, and vacancy.

That is a cash-flow question.

Taxable rental income or loss is a different calculation.

For example, mortgage principal reduces the loan balance but is not a rental expense deduction. Depreciation, on the other hand, can create a tax deduction without requiring a corresponding cash payment that year.

So a property can have:

• negative cash flow but little or no tax loss,
• positive cash flow but a tax loss after depreciation, or
• both negative cash flow and a tax loss.

The spreadsheet and the tax return are measuring different things.

7. A rental tax loss does not automatically reduce your wages

Rental real estate is generally treated as a passive activity for federal income tax purposes.

That means a rental loss generally cannot simply be used against salary, consulting income, or other nonpassive income.

There is an important exception for certain taxpayers who actively participate in rental real estate.

Under the federal special allowance, an eligible taxpayer may generally deduct up to $25,000 of rental real estate loss against nonpassive income.

Active participation is a less demanding standard than material participation. It can include genuine management decisions such as approving tenants, setting rental terms, and approving repairs.

There is also an ownership requirement. To be treated as actively participating, the taxpayer generally must own at least 10% by value of the rental activity, including the spouse’s interest, throughout the year.

The special allowance also phases out as modified adjusted gross income rises above $100,000 and is generally eliminated at $150,000 of MAGI.

Filing status matters too. For married taxpayers filing separately, the allowance is generally limited to $12,500 if the spouses lived apart for the entire year; otherwise, the special allowance is generally unavailable.

IRS Publication 925 explains the active-participation rules, ownership requirement, MAGI phaseout, and filing-status limitations.

For a higher-income household like Evan and Daisy, the phaseout may eliminate the special allowance even if they actively manage the Anaheim property themselves.

The result can be a legitimate rental tax loss that is suspended rather than currently deductible.

Suspended passive losses generally carry forward and may become usable against passive income or when the applicable disposition rules are eventually satisfied.

8. California can produce a different passive-loss result

California generally follows many of the federal passive activity loss rules, but there is an important difference for real estate professionals.

Federal law provides an exception under which qualifying rental real estate activities of a real estate professional are not automatically passive if the applicable requirements, including material participation, are satisfied.

California does not conform to the federal real estate professional provision under IRC Section 469(c)(7).

As a result, a rental real estate activity that receives nonpassive treatment federally under that provision does not receive the same real-estate-professional treatment for California purposes. California continues to apply its passive activity rules through FTB Form 3801.

The 2025 FTB Form 3801 Instructions specifically describe this California nonconformity.

That distinction does not change Evan and Daisy’s immediate decision in Closer, but it can become important as a taxpayer’s real estate activities grow.

9. Keep the records from before the property became a rental

A common mistake is to begin rental recordkeeping on the day the first tenant moves in.

That is too late.

Useful records may reach back to the original purchase:

• closing documents,
• purchase-price and basis support,
• records allocating value between land and building,
• invoices and receipts for capital improvements,
• records of credits or other basis adjustments,
• support for fair market value around the conversion date,
• the date the property became ready and available for rent,
• rental agreements,
• rental income and expense records, and
• depreciation schedules.

The Instructions for Schedule E require taxpayers to keep records supporting items reported on Schedule E.

For a converted residence, those records also preserve the connection between the house’s years as a home and its later years as an investment property.

10. What happens if you eventually sell the former home?

Converting a principal residence into a rental does not automatically eliminate the Section 121 home-sale exclusion.

But conversion by itself does not create eligibility either.

Section 121 can exclude up to $250,000 of qualifying gain, or up to $500,000 for qualifying married couples filing jointly.

A taxpayer generally must have owned and used the property as a principal residence for at least two years during the five-year period ending on the date of sale, along with satisfying the other applicable requirements. The exclusion is also generally unavailable if the taxpayer excluded gain from the sale of another principal residence during the preceding two years.

That distinction matters in Closer.

Evan and Daisy bought the Anaheim house in March 2024 and moved out in 2025. At the time they convert the property to a rental, they have not yet lived there for two full years.

Keeping the property as a rental for additional months does not turn those rental months into principal-residence use for purposes of completing the two-year use requirement.

Depending on the facts, a taxpayer who does not satisfy the full ownership and use tests may qualify for a reduced exclusion because of a qualifying change in employment, health, or certain unforeseen circumstances. That is a separate rule and should not be assumed merely because a move occurred.

There is another important distinction once the basic Section 121 requirements are satisfied.

Under the nonqualified-use rules, a period after the taxpayer’s last use of the property as a principal residence and before the sale is generally excluded from nonqualified use when it falls within the applicable five-year period.

That can prevent a post-move rental period from automatically causing gain to be prorated as nonqualified-use gain.

But it does not mean the rental period counts toward the two-year residence test.

And there is a separate limitation that should not be overlooked: gain attributable to depreciation allowed or allowable for rental or business use after May 6, 1997 generally cannot be excluded under Section 121.

IRS Publication 523, Selling Your Home explains the exclusion amounts, ownership and use tests, prior-sale limitation, nonqualified-use rules, reduced exclusions, and the treatment of depreciation.

The practical distinction is:

A post-move rental period may avoid the nonqualified-use proration rule. It does not help satisfy the two-year residence requirement.

That is one reason the decision to keep a former home should not be based only on whether the monthly rent covers the mortgage.

Common Mistakes

Assuming the rental begins when the tenant moves in.
The important tax date may be when the property becomes ready and available for rent.

Using the original purchase price automatically as depreciation basis.
A converted personal residence generally uses the lower of adjusted basis or fair market value at conversion for depreciation.

Using the depreciation basis automatically as the basis for a later sale.
The lower-of rule determines depreciation basis after conversion. The later gain or loss calculation can involve different basis rules.

Depreciating the land.
Land is not depreciable.

Treating the full mortgage payment as a rental deduction.
Mortgage principal is not a deductible rental expense.

Assuming a rental loss automatically offsets W-2 income.
The passive activity rules may suspend the loss.

Throwing away records from the years the property was a home.
Those records may establish adjusted basis and later affect depreciation and gain calculations.

Assuming rental conversion permanently eliminates the home-sale exclusion.
Section 121 may still apply if its requirements are met.

Assuming rental months after moving out count toward the two-year residence test.
They generally do not. The separate nonqualified-use exception for certain post-move rental periods does not replace the ownership and use tests.

The Key Distinction

1. Moving out changes the use of the property. It does not erase its basis history.
2. Negative cash flow does not necessarily equal a deductible rental loss.
3. Turning a home into a rental changes both the current tax reporting and the tax consequences of an eventual sale.

The tax rules matter, but they do not answer the larger financial question by themselves.

For Evan and Daisy, keeping Anaheim costs money in the short term. What they are buying with that cost is time: a year in Irvine before making a permanent decision about the first house they owned.

Reference

Rental conversion and depreciation

IRS Publication 527 — Residential Rental Property
Explains rental expenses, conversion of a personal residence to rental use, depreciation basis, placed-in-service timing, and residential rental depreciation.

Treasury Regulation §1.168(i)-4 — Changes in Use
Explains how MACRS depreciation applies when property changes from personal use to business or income-producing use.

Treasury Regulation §1.167(g)-1 — Basis for Depreciation
Provides the federal basis rule for depreciation when property is converted from personal use to income-producing use.

Passive activity losses

IRC §469 — Passive Activity Losses and Credits Limited
Provides the federal passive activity loss rules, including rental real estate and the active-participation special allowance.

IRS Publication 925 — Passive Activity and At-Risk Rules
Explains passive rental activities, active participation, the 10% ownership requirement, the special rental real estate allowance, MAGI phaseout, and filing-status limitations.

IRS Form 8582 and Instructions — Passive Activity Loss Limitations
Explains how federal passive activity losses and the rental real estate special allowance are calculated and reported.

Sale of a former residence

IRC §121 — Exclusion of Gain From Sale of Principal Residence
Provides the federal exclusion limits, ownership and use tests, prior-sale limitation, reduced-exclusion rules, nonqualified-use provisions, and treatment of depreciation-related gain.

IRS Publication 523 — Selling Your Home
Explains the Section 121 exclusion, ownership and use tests, rental use of a former home, nonqualified use, reduced exclusions, and depreciation attributable to rental use.

California passive activity rules

California FTB Form 3801 and Instructions — Passive Activity Loss Limitations
Explains California passive activity loss rules and California’s nonconformity with the federal real estate professional provision.

See This Rule in the Story

Closer

Evan’s new job pulls daily life toward Irvine, but selling the Anaheim house immediately feels too permanent. Evan and Daisy decide to rent in Irvine for a year and keep Anaheim as a rental even though the property may have negative monthly cash flow.

Once the house is prepared and offered for rent, Evan realizes that the records he kept while it was their home have a new purpose. The house has changed from a place they live in to an income-producing property, but its earlier tax history comes with it.

READ THE EPISODE →

Related Tax Guide

Home Repairs vs. Improvements: What Adds to Basis?

Repairs and improvements can have different tax consequences, and the distinction continues to matter when a former home becomes a rental. This guide explains which costs may increase basis and why keeping the original records matters.

READ THE TAX GUIDE →