IRS Short-Term Rental Rules and the 14-Day Personal Use Test

The 14-day rule is not a single test. It is the first gate in a layered statutory sequence, and where an owner lands relative to that threshold determines income reporting, deduction limits, and loss treatment for the entire year. This piece maps the three zones that flow from IRC §280A, what actually counts as a personal use day, and where each layer of the framework either opens or closes the next one.

How the 14-day test is actually structured inside IRC §280A

IRC §280A contains two provisions that point in opposite directions, and owners routinely confuse them. Section 280A(d)(1) makes a dwelling unit a "residence" the moment personal use exceeds the greater of 14 days or 10 percent of days actually rented at fair rental. Crossing that line triggers deduction limits. Section 280A(g) does something entirely different. Where a unit is rented for 14 days or fewer per year, rental income is excluded from gross income completely, and no rental expenses are deductible. That second provision is the mechanism behind what practitioners call the Augusta Rule.

The two rules operate from different denominators. Under §280A(d)(1), the denominator is days rented, not days listed or available. A property on a booking platform all year that rents only 40 days has a 14-day ceiling, not a 36-day one. Twenty-one puts them in. There is no proration and no reasonable-cause relief on the count.

Three distinct zones flow from these two provisions. Zone 1 is the Augusta Rule itself: rented 14 days or fewer, income excluded, no deductions. Zone 2 is mixed use: rented more than 14 days and personally used beyond the threshold, so income is reportable, deductions are capped at income, and no loss is allowed. Zone 3 is the active operator: rented more than 14 days with personal use below the threshold, full deductions available, and losses potentially usable against other income. The practical consequence of this architecture is that zone placement determines everything that happens downstream on the return, not just one line.

What the IRS counts as a personal use day — and what it does not

The definition of a personal use day under §280A(d)(2) is both narrower and broader than most owners expect, which is why it is the most frequently litigated factual question under §280A. The family-member list comes from §267(c)(4), and it is specific. Cousins, nieces, and in-laws are not in §267(c)(4). Their fair-rental stays are rental days, not personal use days. Discounted stays and home swaps move entire weeks out of the rental column. The owner received no fair rental.

The one statutory carve-out is repair days. The flush language of §280A(d)(2) excludes any day spent working on repair and maintenance on a substantially full-time basis, even if family members are at the property for recreation on the same day. Van Malssen v. Commissioner (2014) shows what a court finds credible: the Tax Court accepted the taxpayer's time logs as evidence and separately excluded travel days because the principal purpose of the trip was maintenance. The carve-out covers repairs and maintenance, not improvements, so owners who lump all work days together create audit risk.

The documentation burden falls on the owner, never on the IRS. Any part of a day counts as a whole day. A dated log, receipts, and photos from each maintenance visit are the minimum defensible record.

Zone 1 — renting 14 days or fewer and the Augusta Rule tradeoff

Under §280A(g), if you rent a property for 14 days or fewer, the rental income is excluded from gross income entirely. No rental expenses are deductible under §280A(g). Mortgage interest and property taxes remain available as personal itemized deductions, but operating costs, platform fees, and depreciation produce nothing.

Zone 1 applies to primary residences, vacation homes, and second homes alike, as long as total rental days stay at 14 or below. The IRS treats the unit as a personal residence for the year. Zone 1 is useful only for an owner whose goal is tax-free cash on a handful of rental nights.

Zone 2 — crossing the personal use threshold and what §280A(c)(5) actually does to deductions

Once a property is classified as a residence under §280A(d)(1), §280A(c)(5) caps rental deductions at gross rental income, and it does so in a fixed sequence. Depreciation comes last. What the ceiling squeezes out carries forward subject to the same limitation, and the carryforward only returns against future rental income from that same property.

The cost of crossing the line is visible in a worked example. A property rented 200 days has a threshold of 20 personal nights, which is 10 percent of rental days. At 20 personal nights, a Schedule E loss is allowed, assuming §469 is cleared on its own facts. At 25 personal nights, the Schedule E result is zero. Rental deductions are capped at rental income, and operating costs plus depreciation carry to the following year. It comes from a long weekend in October and a few nights in March that the owners did not plan around the threshold.

Section 280A runs before §469. If a dwelling unit is subject to §280A(c)(5) for the year, income, deductions, gain, and loss allocable to that use are not taken into account under §469 at all. That means no $25,000 active participation allowance. A house that is a residence for the year has no loss left for §469 to characterize.

How expenses are allocated between rental and personal use — and the split the IRS still loses in court

Under §280A(e)(1), rental expenses are allocated by days rented at fair rental over total days used, meaning rental days plus personal days. On 200 rented days and 25 personal days, the rental fraction is 200 divided by 225, not 200 divided by 365. IRS Publication 527 applies this fraction to every expense category, including mortgage interest and property taxes.

The problem is that §280A(e)(2) says the subsection does not apply to deductions allowable whether or not the unit was rented. Mortgage interest and property taxes accrue across the year regardless of use. In Bolton v. Commissioner, 694 F.2d 556, the Ninth Circuit held that interest and taxes should be allocated by rental days divided by 365, treating them as year-round expenses. That means more of the rental income cap remains available to absorb operating expenses and depreciation, producing a usable deduction where the IRS method produces a permanent loss.

The IRS has not acquiesced in Bolton and continues to litigate outside the Ninth Circuit. Publication 527 does not mention Bolton or acknowledge the circuit split. The stakes are largest on properties with high carrying costs relative to rental income.

Zone 3 — keeping personal use below the threshold and how the seven-day loophole is actually structured

When personal use stays at or below the greater of 14 days or 10 percent of rental days, §280A(c)(5) does not apply. The property is not a residence, full deductions are available, and losses can be characterized under §469. That is the first gate. The second gate is the seven-day rule. Treas. Reg. §1.469-1T(e)(3)(ii)(A) removes a property from the definition of a rental activity when the average period of customer use is seven days or less.

The seven-day rule is a regulatory exception, not a statutory one. It lives in temporary regulations under §469, which is why it carries no headline in the Code itself. There are six exceptions in Treas. Reg. §1.469-1T(e)(3)(ii), labeled (A) through (F). The seven-day rule is only the first. The others cover longer stays with significant personal services, extraordinary personal services, and entity structures. Most are inapplicable to a conventional whole-property short-term rental.

The arithmetic of the seven-day average is unforgiving. Under Treas. Reg. §1.469-1(e)(3)(iii)(C), the average period of customer use is the aggregate number of days in all periods of customer use divided by the number of those periods. Multiple properties may be organized into classes, with each class weighted by its share of gross rental income.

Clearing the seven-day test is not enough. Treas. Reg. §1.469-1T(e)(1) defines a passive activity two ways: a trade or business without material participation, or a rental activity regardless of participation. The most common standard in practice is more than 500 hours per year on the property, though an owner who does substantially all the work may also qualify. When both prongs are met, the activity is non-passive, and losses may offset W-2 income and other active income without limit.

Schedule E vs. Schedule C — the separate classification axis that determines self-employment tax exposure

Whether income from a Zone 3 short-term rental goes on Schedule E or Schedule C is determined by the services the owner provides, not by the passive-activity classification. IRS Publication 527 draws the line at the character of services. Schedule E applies when the owner provides customary services, such as heat, light, and trash collection, that facilitate the rental but are not primarily for the tenant's convenience. Schedule C applies when the owner provides substantial services primarily for the tenant's convenience, such as regular cleaning during the stay, changing linen, or maid service.

Whether services are substantial depends on the complete facts. Even if a short-term rental qualifies as non-passive under the seven-day rule, Schedule C classification still depends on whether substantial services are provided. These are two separate analyses, and one does not determine the other.

How bonus depreciation under the One Big Beautiful Bill interacts with the §280A gate

Prior law under the TCJA schedule had bonus depreciation phasing down toward a low rate in 2026 and zero in 2027. The One Big Beautiful Bill Act, signed July 4, 2025, erased that phase-out and made 100 percent bonus depreciation permanent for qualifying property acquired and placed in service after January 19, 2025. IRS Notice 2026-11, issued January 14, 2026, confirmed that taxpayers may continue relying on the existing first-year depreciation regulations under Treasury Regulation §1.168(k)-2 while proposed regulations are developed.

If you are a Zone 3 operator who also clears the seven-day loophole, 100 percent bonus depreciation combined with a cost segregation study can generate large year-one deductions. Cost segregation studies typically reclassify a meaningful share of a property's value into faster-depreciating categories. Virtual Cost Segregation's 2026 guide puts the typical reclassification around 25 percent of property value.

The §280A gate runs before §168(k). If personal use crosses the residence threshold, §280A(c)(5) caps rental deductions at gross rental income before bonus depreciation is ever reached. A Zone 3 owner who also meets the material participation test can. What changed is the size of the deduction an owner loses by crossing the line inadvertently.

The repair versus improvement distinction becomes financially critical in this context. A repair, patching a roof leak or replacing a broken faucet, is deductible in the year it happens. A capital improvement, a new roof or a full kitchen remodel, must be capitalized and depreciated under §263(a) and the tangible property regulations at §1.263(a)-3, which is where bonus depreciation and cost segregation apply. Owners who misclassify improvements as repairs, or the reverse, misstate their personal use count and their depreciation basis at the same time.

Documentation practices that determine whether a claimed position survives an audit

The positions that produce the best tax outcomes under the 14-day framework are the ones hardest to prove after the fact, and the audit failure mode is almost always a documentation gap, not a legal misreading. The most common pattern works like this. The loss is disallowed, and the accuracy-related penalty under §6662, 20 percent of the deficiency, applies on top of the tax owed. The suspended loss carries forward but no longer offsets W-2 income.

The parallel failure runs through personal use days. For material participation, the log must be built during the year, not reconstructed in April. Booking management, guest communication, maintenance coordination, and turnovers all count, but only with dates and hours. For below-market rental days, documentation of fair rental value on each date is essential.

The Bolton allocation position is also a documentation matter. A return that claims the Bolton method for interest and property taxes should disclose the position and be prepared to defend it outside the Ninth and Tenth Circuits. The documentation burden falls hardest on one class of owners: affluent families who use premium vacation homes personally for extended periods and also rent them. Their personal use count is the most ambiguous, their potential deduction loss is the largest, and their repair days are the most likely to blur into improvement projects.

Owners who hand property management to a professional service have a built-in record of rental days, guest screening, and maintenance history that serves as contemporaneous documentation. The records exist because the operation requires them, not because tax planning demanded them after the fact. The stakes are.