Learn which rental-property days count as personal use, how the 14-day and 10% test works, and why below-market stays can change deductions.
Personal-use days are days when a taxpayer, certain family members, another owner, or someone paying less than fair rental value uses a dwelling unit. The count helps determine whether mixed-use property is treated as a residence under the vacation-home rules and how rental expenses must be allocated or limited.
A day is not classified solely by whether rent was collected. Who used the property, what that person paid, and why the owner was there all matter. Accurate day counts are therefore essential for vacation homes, seasonal rentals, and short-term rentals that the owner also visits.
A day generally counts as personal use when the dwelling is used by:
The family rule is broader than many owners expect. A full-price week rented to an adult child may still be personal use unless the principal-residence exception applies. A discounted stay for a friend can also be personal use because the price is below market.
Fair rental value is the amount an unrelated person would pay for comparable property under similar conditions. Preserve listings, comparable rates, platform data, seasonal pricing, and any explanation for discounts. A lower price during an off-season is not necessarily below market if it reflects actual market conditions.
A day ordinarily is not treated as personal use when the taxpayer works substantially full time repairing and maintaining the property. This exception can apply even if family members use the property for recreation on the same day. The owner should document the work performed, hours, supplies, invoices, photos, and contractor coordination.
Traveling to the property or doing a brief task does not automatically convert a vacation day into a repair day. The facts should support that repair or maintenance work—not recreation—was the principal purpose and occupied substantially the full workday. Improvement work may still qualify for the day-count exception, but its cost may need capitalization rather than a current repair deduction.
A dwelling is generally treated as used as a residence when personal use exceeds the greater of:
For example, a property with 240 fair-rental days has a 10% threshold of 24 days. Because 24 is greater than 14, the threshold is 24 days. Twenty personal-use days do not exceed that threshold, so the dwelling is not treated as used as a residence under this test.
If the owner had 25 personal-use days, she would exceed the 24-day threshold. The dwelling would be treated as a residence, and the vacation-home expense limitation would generally prevent rental deductions from creating or increasing a rental loss after the required allocation.
The statutory test says "more than" the greater amount. Exactly 14 personal days when 10% of fair-rental days is lower does not exceed the threshold. Days available for rent but vacant generally are not fair-rental days and are not personal-use days; keep them separate.
When a property has both rental and personal use, expenses must be divided. Direct rental expenses, such as a platform fee for a particular guest, may be fully rental. Direct personal expenses are not rental deductions. Shared costs—mortgage interest, property tax, insurance, utilities, repairs, and depreciation—require a reasonable allocation under the applicable tax rules.
Different allocation conventions can apply to different expenses, and court decisions have affected vacation-home allocation in some circumstances. Owners should not assume that every shared cost uses one identical fraction. A tax preparer should review the dates, the nature of each expense, and the reporting position.
Personal-use counting is separate from the average-stay test used under the passive activity rules. A property can average five guest days per stay and still be subject to vacation-home limits because the owner used it personally. Conversely, a long-term rental with limited owner use may not be treated as a residence.
Reporting location is another separate question. Schedule E versus Schedule C generally depends on the services and activity, not merely personal-use days. Material participation, basis, at-risk rules, passive-loss rules, and excess business loss rules can apply after the vacation-home calculation.
California generally follows the federal framework for determining personal use of rental dwellings, but the final California rental result can differ because depreciation and other state adjustments differ. A California taxpayer should preserve the same day calendar for federal and state returns, then maintain separate depreciation and suspended-loss schedules where required.
Local short-term-rental occupancy rules do not replace the federal or California income-tax day tests. A local ordinance may define a short-term stay as fewer than a stated number of days, while federal vacation-home rules use personal-use days and fair-rental days for a different purpose.
Retain a calendar identifying fair-rental, personal, vacant, and full-time repair days; booking statements; leases; payment records; comparable-rate evidence; guest identities when relevant; travel notes; receipts; photographs; and work logs. The calendar should reconcile to platform statements and reported rental income.
Heath Income Tax can help mixed-use property owners reconstruct day counts, allocate expenses, and reconcile federal and California rental limitations.
Does a day spent checking the property count as personal use?
It depends on the facts. Substantially full-time repair or maintenance work can prevent personal-use treatment; a short inspection during a vacation generally does not.
Do family members' days always count as personal use?
Generally yes for the listed family relationships, even at fair rent, but an exception can apply when the family member uses the dwelling as a principal home and pays fair rent.
Do personal-use days make all rental income tax-free?
No. They can change expense allocation and limitations. A separate fewer-than-15-days rule may exclude income when a home is rented for fewer than 15 days.
The definitions and examples on this page are for informational purposes only and do not constitute tax advice. Tax laws change frequently and individual circumstances vary. Consult a qualified tax professional before making decisions based on this content.
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