Personal use days on an Airbnb: the 14-day rule and what it does to your STR loss

What is the 14-day rule for vacation rentals?

It is the test in IRC §280A(d)(1) for whether a dwelling unit was "used by the taxpayer during the taxable year as a residence." You used it as a residence if your personal use days exceed the greater of 14 days or 10% of the days it was rented at a fair rental. The word that matters is "exceed." Fourteen personal days is fine. Fifteen is over, unless the place rented at least 150 days, in which case the 10% side is the higher bar.

The bar moves with your occupancy. A rental that books 180 nights can absorb 18 personal days. One that books 300 can absorb 30. A slow property is the one with the least room, which is an unkind design for anyone whose cabin had a soft year.

One wrinkle cuts the other way. If you stay at the place on a day a guest has already paid for (the guest left early and handed you the keys, say), that day is still a rental day when you split expenses. For the home test it switches sides: it counts as a personal day, and it comes off the rental-day total the 10% is figured on. Publication 527's third example shows an owner whose 7 ordinary family days plus 10 days inside a paid booking add up to 17 personal days against a limit of 16, which makes the condo a home.

What counts as a personal use day on an Airbnb?

More than "nights I slept there." The Schedule E instructions define it as "any day, or part of a day," that the unit was used by any of these:

• You, for personal purposes, or anyone else who owns part of the unit.
• Anyone in your family, or in a co-owner's family. Family means your spouse, siblings, half siblings, ancestors and lineal descendants. In-laws, cousins, aunts and friends are not on that list.
• Anyone who pays less than a fair rental price.
• Anyone staying under an arrangement that lets you use some other dwelling, even if both sides pay full rate. A house swap with another owner makes their days at your place your personal days.
• Whoever bought a stay you donated to a charity auction, on the days they use it.

Three of those catch owners out. The co-owner rule means a partner's week at the place is a personal week for both of you; Publication 527's first example is two neighbors who own a beach condo, where only one of them used it. The family rule has a narrow exception: a family member is not personal use only if they rent the unit as their main home at a fair rental. Your brother booking a week at full nightly rate for a vacation is still personal use, because it is not his main home. And "part of a day" means the afternoon you dropped by to sit on the dock counts as a day.

Days the property sat open on the calendar and nobody booked are neither rental nor personal. They do not count at all.

Do days I spend fixing the property count as personal use?

Not if you work on it substantially full time that day. The statute says a day of repair and maintenance on a substantially full-time basis is not personal use merely because other people there are not working, and Publication 527 puts it plainly: "Don't count such a day as a day of personal use even if family members use the property for recreational purposes on the same day."

The publication's example draws the line. Corey spends a week at his cabin, works on it 3 or 4 hours a day and fishes the rest; his family works on it substantially full time every day. Because the main purpose of the week was maintenance, the week is not personal use. Three or four hours a day of Corey's own work, alone, would not have carried it.

Two limits matter. The rule covers repairing and maintaining, not improving, so a week building a new deck is not a maintenance week (the repairs vs improvements post has the line between them). And the burden is on you. A maintenance day that shows up on the calendar as an owner block, with no receipts, photos or task list from that date, is a personal day waiting to be argued about. The same records do double duty: those hours belong in your material participation log too.

What happens when the rental counts as a home?

Three things, and the third is the expensive one.

First, the rental income is still reported in full and expenses are still split between rental and personal days (the next section). That part happens whenever there is any personal use at all.

Second, §280A(c)(5) caps rental deductions at rental income, in a fixed order. Worksheet 5-1 in Publication 527 takes the rental share of mortgage interest and property taxes first, along with direct rental costs like platform and agency fees and advertising. Operating costs (utilities, insurance, repairs, cleaning) come next, up to whatever income is left. Depreciation goes last. Whatever does not fit carries forward to next year as an expense of the same property, and the publication notes the carryover stays limited "even if you don't use the property as your home for that subsequent year."

Third, §469(j)(10) says that for a dwelling unit where §280A(c)(5) applies, income and loss from that use "shall not be taken into account" under §469. Publication 527 says it in one line: "Renting a dwelling unit that is considered a home isn't a passive activity." That sounds like good news and is not. The STR loophole works by making a rental loss non-passive so it can offset W-2 income. A home-year property cannot produce a loss in the first place. The 7-day average stay and your material participation hours stop mattering for that property for that year, because there is no loss left for them to act on.

How do you split expenses between rental and personal days?

By days. §280A(e) limits rental expenses to the share that rental days bear to total days of use. Publication 527 states it as total days rented at a fair price over total days the unit was used for any purpose. Vacant days are left out of both.

Here is a worked example, hypothetical and rounded to the dollar. A lake cabin rents 180 nights at market rate for $36,000. Mortgage interest and property taxes are $18,000. Platform fees and advertising, which are 100% rental, are $6,000. Utilities, insurance, repairs and cleaning supplies come to $18,000. Depreciation is $12,000 (a cost segregation study would make that number much larger, which makes the cap bite harder).

The third column is the one most owners have not heard of. In Bolton v. Commissioner, 77 T.C. 104 (1981), affirmed 694 F.2d 556 (9th Cir. 1982), the court let the owners split interest and property taxes over all 365 days of the year rather than over days used, on the reasoning that those costs accrue every day whether or not anyone is in the house. A smaller rental share of interest and taxes leaves more room under the income cap for operating costs and depreciation, which are the expenses that would otherwise be stranded. The personal share of interest and taxes grows, and some of it may be deductible on Schedule A if you itemize. Publication 527's worksheet uses the days-used method. Which method fits your return is a conversation to have with your CPA before they file, not after.

A clean split depends on a clean rental income figure. If Line 3 is built from bank deposits it is net of platform fees, and in a home year Line 3 is the ceiling on everything else, so the gross vs net problem and passthrough occupancy tax both move the cap.

Can I still take the STR loophole loss if I used the rental more than 14 days?

Only if the extra days stayed under 10% of your fair-rental days. If personal use exceeded the greater of the two, no: the property was a home for the year, §280A(c)(5) capped its deductions at its income, and §469(j)(10) removed it from the passive loss rules, so there is no loss for material participation to make non-passive. The disallowed expenses carry forward, and they can be used in a later year when that property has income to absorb them.

Two related points. Personal days are not guest stays, so they do not enter the 7-day average-stay test; owner stays do not push the average up, and they cannot pull it down either. And the test runs per dwelling unit, per year. One property in a home year does not taint the other four, and a home year in 2026 does not decide 2027.

What is the 15-day rule, and does it ever help an STR?

§280A(g) is the other side of the same section. If you use a dwelling unit as a home and rent it out for fewer than 15 days in the year, the rental income is not taxable and you deduct none of the rental expenses. Publication 527 says to leave it off Schedule E entirely; mortgage interest and property taxes go on Schedule A as they normally would. It is the rule people in host cities use to rent their primary residence for a race weekend or a football game.

For a working STR it is almost never relevant. It applies only to a unit that is also your home for the year, and it disappears on the 15th rental day. It is worth knowing for one case: a second home you mostly use yourself and list only for a busy holiday week.

Where do personal use days go on Schedule E?

Line 2, per property: "the number of days in the year each property was rented at fair rental value and the number of days of personal use." The same line has the QJV box for spouses. Those two numbers are the whole §280A test, sitting on the face of the return, so a preparer will ask you for them, and an examiner can do the arithmetic in their head. The Schedule E line-by-line guide covers the rest of the form.

Two counting rules from the Publication 527 examples help here. A day you stayed inside a guest's paid booking counts as rental on Line 2 for the expense split but as personal for the home test. Days the place was listed and empty go in neither box.

What to check before December 31

1. Count personal days so far for each property, using Figure 2: your stays, co-owners, family of either, discounted or comped stays, swaps. Count partial days.
2. Count fair-rental days booked through December 31 and work out each property's limit: the greater of 14 and 10% of that number.
3. Compare your holiday plans to the room left. A property at 12 personal days with 160 rental days has 4 days of room, not 2.
4. If family is coming, look up whether they are family under the rule. A friend paying full price is a rental day. A sibling paying full price is a personal day.
5. For maintenance trips, decide in advance that they are maintenance trips, and keep the evidence from that date: the task list, receipts and photos, plus the hours in your log.
6. Label owner blocks on the PMS calendar by reason (personal, maintenance, held for a repair). In March nobody remembers which block was which.
7. If a property is already over its limit for 2026, tell your CPA now, so the year-end plan (a cost seg study, an equipment purchase, a prepaid repair) is not counting on a loss that cannot exist this year.

The rest of the fall list (reconciliations, W-9s, hours-log catch-up) is in the Q4 tax-season checklist.

Frequently asked questions

How many days can I stay at my own Airbnb without losing deductions?

Up to the greater of 14 days or 10% of the days the property rented at a fair price during the year. The rule in IRC section 280A(d)(1) applies when personal use exceeds that number, so a property with 180 rental days can absorb 18 personal days and one with 300 can absorb 30. Personal days include any day or part of a day used by you, a co-owner, a family member of either, anyone paying less than a fair rental, or anyone under a swap arrangement. Going over makes the property a home for that year, which caps rental deductions at rental income. Any personal use at all, even under the limit, still means expenses are split between rental days and personal days.

Does family staying for free count as personal use?

Yes, and so does family paying full price. A family member's stay is personal use unless they rent the unit as their main home at a fair rental price. Family means your spouse, siblings, half siblings, ancestors and lineal descendants, and the same applies to the family of any co-owner. In-laws, cousins and friends are not on the list, so a friend or a cousin who pays market rate is a rental day. Anyone who pays less than a fair rental price counts as personal use whether or not they are related to you.

Do days I spend fixing the property count as personal use?

No, if you spend the day working substantially full time on repairs and maintenance. IRS Publication 527 says not to count such a day as personal use even if family members use the property for recreation on the same day. Improvements do not qualify, only repairs and maintenance. Keep dated evidence such as receipts, photos and a task list, and log the hours, because the same work counts toward material participation.

Can I take the STR loophole loss if I used the rental more than 14 days?

Only if your personal days stayed at or under 10% of your fair-rental days. If personal use exceeded the greater of 14 days or 10%, the property was a home for the year: section 280A(c)(5) caps its deductions at its rental income, and section 469(j)(10) removes it from the passive activity rules. There is no loss left for material participation to make non-passive. Disallowed expenses carry forward to the next year for the same property. The test runs per property per year, so other properties and other years are unaffected.

Do I have to report rental income if I rent my home for less than 15 days?

No. Under section 280A(g), if you use a dwelling unit as a home and rent it for fewer than 15 days during the year, the rental income is excluded from income and none of the rental expenses are deductible as rental expenses. IRS Publication 527 says not to report it on Schedule E; mortgage interest and property taxes are deducted on Schedule A as usual if you itemize. The rule stops applying on the 15th rental day, so it rarely matters for a working short-term rental.

Related deep dives

• The STR tax loophole, full §469 playbook: what a home year switches off, and the other conditions that have to hold.
• How to track §469 material participation: the seven tests, and why the cleaner's hours matter.
• The STR hours tracker: where maintenance-day hours get logged as they happen.
• Schedule E line-by-line: Line 2 and every line after it.
• Repairs vs improvements: the line that decides whether a work week is a maintenance week.
• Cost seg timing, year 1 vs year 2: why a study in a home year is a study whose depreciation mostly carries forward.
• The gross rent trap in PMS exports: Line 3 is the cap in a home year, so it has to be gross.
• The Q4 tax-season checklist: everything else due before December 31.

Sources

• IRC §280A: (a) the general disallowance, (c)(5) the income cap, (d)(1) the 14-day / 10% test, (d)(2) and (d)(3) personal use and the main-home family exception, the repair and maintenance rule, (e) the expense split, (g) the under-15-day rule.
• IRC §469(j)(10): coordination with §280A.
• IRS Publication 527 (2025), chapter 5: dividing expenses, the beach cottage and resort condo examples, "What is a day of personal use?", donated use, days used for repairs and maintenance (the Corey example), days as a main home before or after renting, limit on deductions, Worksheet 5-1.
• 2025 Instructions for Schedule E (Form 1040), Line 2: fair rental days, personal use days, and "any day, or part of a day."
• Bolton v. Commissioner, 77 T.C. 104 (1981), aff'd 694 F.2d 556 (9th Cir. 1982): interest and taxes allocated over days in the year.
• Journal of Accountancy (September 2018), on vacation home rental deductions: the IRS method and the Bolton method compared.

Disclaimer

RentReel is bookkeeping software, not tax advice. The worked example uses made-up round numbers to show the mechanics; your own split depends on your facts, and the choice of allocation method should be made with a licensed CPA. Rules are cited to the statute and the IRS publications current as of October 2026. Consult a CPA, ideally one who works with short-term rentals, before filing.