The 14-Day Rule for Short-Term Rentals: How the IRS Classifies Your Vacation Home and What It Changes for Your Taxes

Picture this: You are a serious buyer. You have run the numbers on a $550,000 beach house in a coastal vacation market. At your projected occupancy and average daily rate, the property generates roughly $30,000 in gross rental income per year. After expenses and depreciation, you expect a meaningful rental loss that shelters some of your other income. The investment makes sense on paper, and the personal use plan sounds modest: four weeks a year, including the Fourth of July week because the family has always done that.

Now picture what your accountant says when you mention the Fourth of July week.

Under IRC Section 280A, if you use a rental property personally for more than 14 days in a tax year, or more than 10% of the days it was rented at fair market value (whichever number is greater), the IRS classifies the property as a personal residence. That reclassification does not eliminate your rental income. It does something more consequential: it caps your rental deductions at whatever you earned in rent. The loss you built your investment thesis around is gone.

This is not an obscure technicality. It is one of the most consequential rules in short-term rental investing, and it hits hardest precisely when buyers plan their personal use the way vacation properties are marketed: during peak season, when rates are highest and personal use days cost the most in both forgone income and deduction eligibility.

What IRC Section 280A Actually Says

Section 280A of the Internal Revenue Code governs the deductibility of expenses for any dwelling unit you use personally and also rent to others. IRS Publication 527 (Residential Rental Property) walks through the full framework. IRS Topic 415 covers the classification mechanics that determine which tier your property falls into.

The core question under Section 280A(d) is: how many days did you use the property for personal purposes, and how does that compare to the number of days you rented it at fair market value during the same year?

The personal residence threshold is: personal use exceeding the greater of 14 days or 10% of the total days rented at fair market value during the year.

The “greater of” construction matters. If you rented the property for 200 days, 10% is 20 days, so the threshold rises to 20 personal use days before the personal residence classification applies. If you rented for 80 days, 10% is only 8 days, and the threshold stays at 14 (since 14 exceeds 8). The threshold scales with your rental volume, within limits.

For most STR investors targeting 90 to 150 rental days per year, the effective threshold is 14 days of personal use. That is the number to plan around. Exceed it and you are in the vacation home classification with deductions capped at rental income. Stay below it and your property is a rental asset with standard tax treatment.

This article provides general information and should not be construed as legal advice. Consult a qualified CPA or tax attorney for advice specific to your situation.

Which Days Count as Personal Use (and Which Do Not)

The day count is where most investors get into trouble. The rule is broader than most people expect, and the exceptions are narrower than investors hope.

Under Section 280A, a day of personal use is any calendar day on which you, a family member, or someone you allow to use the property at below-market rates occupies it. The IRS defines family members broadly: spouse, children, grandchildren, parents, grandparents, and siblings. If your brother-in-law stays for a long weekend at no charge, those days count against you. If a stranger pays the market rate, they do not.

Days that count toward personal use:

• Any day you occupy the property, even partially
• Any day an immediate family member stays, whether or not you are present
• Any day the property is made available to someone at below fair market value
• Any day a friend or associate uses it at no charge
• Any day under a reciprocal home-swap arrangement

Days that do not count as personal use:

Days spent at the property engaged in repairs or maintenance on a “substantially full-time basis” are excluded from personal use under Section 280A(d)(2)(A). The IRS applies a facts-and-circumstances test: the primary purpose of your presence must be genuine maintenance or repair, not recreation or personal enjoyment.

If you spend a Saturday morning fixing a broken deck railing and then spend the afternoon at the beach, that day counts as personal use. The “substantially full-time” standard means the repair work must be the dominant and genuine purpose of your presence. Investors who try to characterize every visit as a maintenance trip (despite arriving with the family and the kayaks) will have a difficult time defending that on audit.

One counting rule that catches people: the IRS uses calendar days, not 24-hour check-in-to-checkout periods. A guest who arrives Saturday and departs Monday generates two rental days, not one. Your own stays work the same way. Arriving Friday evening and leaving Saturday night is two personal use days.

The fair market value test:

For a day to count as a rental day, the property must be rented at a rate consistent with fair market value for comparable properties in your area during the same period. If you charge a friend $100 for a week when the market rate is $350 per night, those days count as personal use, not rental days. The IRS expects the rate to reflect what you would charge a stranger during the same time period.

The Three Classification Tiers Under Section 280A

The personal use day count puts your property into one of three categories, each with different tax treatment.

Tier 1: Pure Rental Property

Criteria: Property rented 15 or more days per year, and personal use stays below the threshold (fewer than the greater of 14 days or 10% of rental days).

When personal use stays below the threshold, Section 280A’s deduction limitations do not apply. The property is a standard rental activity: income and expenses on Schedule E, losses subject to the passive activity rules (the IRS framework that limits how much rental losses can offset your W-2 or other ordinary income; the $25,000 rental loss allowance for active participants phases out between $100,000 and $150,000 of adjusted gross income), and depreciation running on its full schedule. Real estate professionals who meet the 750-hour material participation test can deduct losses against ordinary income without the passive activity cap.

This is the tax treatment STR investors are targeting when they underwrite a vacation property purchase as an investment. Reaching it requires keeping personal use genuinely below the threshold, which means making that decision before purchase.

Tier 2: Vacation Home / Mixed-Use Property

Criteria: Property rented 15 or more days per year, and personal use exceeds the threshold (greater of 14 days or 10% of rental days).

This is the classification most vacation property buyers end up in when they have not planned specifically around the rule. Rental deductions remain available, but they are hard-capped at gross rental income for the year. No rental loss is possible under any circumstances, regardless of what the passive activity rules would otherwise allow.

Deductions must be taken in a specific order: first the rental-use share of mortgage interest and property taxes, then operating expenses (insurance, utilities, management fees, repairs), then depreciation. If gross rental income is exhausted before you work through the list, the remaining deductions carry forward to future tax years. They are not lost permanently, but they are deferred with no guarantee of when the property generates enough rental income to use them.

Tier 3: Minimal Rental (The Augusta Rule)

Criteria: Property rented fewer than 15 days per year, regardless of personal use.

Section 280A(g) provides a complete exclusion: rental income from a property rented 14 or fewer days during the year is not taxable and does not need to be reported. The catch (yes, there is always a catch) is that you also cannot deduct any rental expenses for those days. For an active STR investor, 14 rental days per year is not a viable investment model. This tier applies to homeowners who occasionally rent during major local events, not to investors running a rental business.

Three Personal Use Patterns, Three Tax Outcomes

The difference between these tiers is clearest in concrete scenarios. The following three examples use a consistent hypothetical property:

• Purchase price: $550,000
• Annual mortgage interest: $28,000
• Property taxes: $7,000
• Insurance: $4,200
• Utilities and maintenance: $5,400
• Property management fees: 20% of gross rental income
• Annual depreciation: approximately $16,000

Scenario 1: 5 Personal Use Days, 120 Rental Days

Five days of personal use against 120 rental days puts this property well below the 14-day threshold. The 10% test produces a threshold of 12 days (10% of 120), but since 14 exceeds 12, the effective threshold remains 14 days. Personal use of 5 days clears it with room to spare.

Five personal use days is achievable for investors who treat the property primarily as a business asset. It might look like a long weekend at the start of the season before peak demand, and a few nights during the shoulder period in fall. It requires deliberate calendar management, but it is a legitimate and common structure for investors who prioritize the tax treatment over personal enjoyment of the property.

Scenario 2: 20 Personal Use Days, 100 Rental Days

Twenty personal use days against 100 rental days crosses the 14-day threshold. The 10% test produces a threshold of 10 days (10% of 100), but since 14 exceeds 10, the effective threshold is 14. At 20 personal use days, the property is classified as a vacation home under Section 280A and the loss deduction is gone.

Twenty personal use days sounds modest. Three weeks total across an entire year. In practice, it often looks like this: one week over spring break, ten days in summer, and a few long weekends in fall. That schedule, which is entirely reasonable for someone who bought a vacation property to enjoy, pushes the property into the mixed-use tier and eliminates loss deductions entirely.

The deduction carryforward is not worthless. If the property generates rental income in future years, those deferred deductions can offset it. But for buyers who underwrote the investment expecting annual loss deductions against ordinary income, the carryforward is not the same thing.

Scenario 3: 60 Personal Use Days, 60 Rental Days

At 60 personal use days against 60 rental days, the property is classified as a personal residence under Section 280A. Personal use far exceeds the 14-day threshold. Gross rental income of $15,000 is the deduction cap, and with mortgage interest, property taxes, and operating expenses likely consuming most of that amount, depreciation is rarely reachable in the current year.

This is a vacation home that also generates some rental income. The IRS treats it exactly that way. The rental income is taxable (since it exceeds the 14-day threshold), but deductions are so constrained by the income cap that the primary tax benefit comes from the Schedule A deduction for mortgage interest and property taxes on the personal residence side. This structure works for someone who genuinely wants a vacation property and views rental income as a secondary benefit. It does not work for someone who modeled the purchase as an income-producing investment with tax-sheltered returns.

How Deductions Are Allocated in the Mixed-Use Tier

When your property falls into the vacation home classification, the allocation of expenses between rental and personal use becomes a meaningful calculation with two competing approaches.

The Bolton Method (named for the Palm Springs vacation home case that established it) comes from Bolton v. Commissioner, 694 F.2d 556 (9th Cir. 1982). The Tax Court, affirmed by the Ninth Circuit, held that mortgage interest and property taxes should be allocated using the ratio of rental days to 365 total days in the year. Operating expenses (insurance, utilities, management fees, repairs) are allocated using the ratio of rental days to total days the property was actually used.

The practical effect: a property rented 100 days and used 120 total days (100 rental, 20 personal) allocates mortgage interest and taxes at 100/365 = 27.4%, not 100/120 = 83.3%. This leaves more of the capped rental income available for operating expense deductions and, potentially, some depreciation.

The IRS method allocates all expenses, including interest and taxes, based on rental days divided by actual use days. The IRS method allocates a higher percentage of interest and taxes to rental use, but this can squeeze out the operating expense deductions that investors most need.

The IRS has not formally accepted Bolton, but it is controlling law in the Ninth Circuit and the Tax Court’s established position. Taxpayers outside the Ninth Circuit who use the Bolton method are in a stronger position than they were a decade ago, but the IRS may still challenge the calculation on audit. Document your methodology and the legal basis for it.

For investors evaluating how financing structure interacts with deduction allocation, the STR Financing Guide covers how DSCR loans are underwritten for vacation properties.

What This Means Before You Close

The 14-day rule does not make vacation rental investing impractical. Many investors hold vacation properties under the pure rental classification, manage their personal use deliberately, and generate the tax treatment they projected. But reaching that outcome requires a decision made before closing, not an attempt to manage the calendar after the fact.

The honest question to ask before signing: how many personal use days do I actually plan to take, realistically, across multiple years? Not the theoretical minimum, but the real number that accounts for family expectations and the natural tendency to use a nice vacation property more than intended.

The gap between 13 personal use days and 15 is the gap between uncapped rental deductions and capped deductions. The gap between 5 personal use days and 20 can represent tens of thousands of dollars in tax liability difference over a holding period. Neither number is right or wrong for every buyer. What matters is that the number is known before purchase, not discovered the following April.

For investors modeling how different personal use patterns interact with specific market returns, the StaySTRA Analyzer provides market-level occupancy and revenue data to anchor the income side of that analysis.

A few related tax questions worth understanding alongside Section 280A: when you eventually sell the property, the depreciation carryforward from vacation home years does not disappear. The IRS will recapture depreciation based on the amount allowable, not only the amount actually deducted, which affects your exit tax calculation. The capital gains and depreciation recapture guide covers what that means at sale. If you are considering a tax-deferred exit, the 1031 exchange guide for STR properties explains the specific holding period and use requirements that apply.

The 14-day rule is also separate from the 7-day average rental period test that determines whether an STR is treated as a rental activity or a business on Schedule C. Both classification questions affect your tax position in different ways. The Schedule E vs. Schedule C guide covers the average rental period test and what it means for self-employment tax. And if you are using a DSCR loan to finance the purchase, the DSCR qualification guide explains how personal use patterns affect income documentation on prior-year returns.

We do our best to keep our tax guides accurate and up to date, but tax law changes and every situation is different. Always verify current rules with a qualified CPA or tax attorney before making investment or tax decisions.