A day at your own short-term rental can be two things at once: a personal-use day under the vacation-home rules in IRC §280A and a day that contains genuine participation hours under IRC §469. The two rules count different units on different scales — §280A counts days, §469 counts hours — and neither record can be derived from the other. Owners who keep only one of them usually find out at filing time that the other was the one being asked for.
Two different counts, two different rules
The first rule is about deductions. §280A limits what can be deducted on a dwelling unit that the owner also uses personally. The statute generally treats a unit as used as a residence when personal use for the year exceeds the greater of 14 days or 10 percent of the days the unit is rented at a fair rental. Cross that line and the deduction mechanics change. The unit of measure is the day.
The second rule is about where a loss is allowed to go. IRC §469 and Treas. Reg. §1.469-5T decide whether you are passive or non-passive in the activity, through the material participation tests: more than 500 hours, more than 100 hours with no other individual participating more, and the others in the regulation. Treas. Reg. §1.469-1T(e)(3) separately defines when a rental is treated as something other than a rental activity, including the exception for an average period of customer use of seven days or less. The unit of measure here is the hour, and our guide to what counts as participation covers which tasks the regulation describes as participation at all.
These two rules move independently. A property can clear the seven-day average and the 100-hour test and still have enough personal nights to be a residence under §280A, and a property with no personal nights at all can still fail every material participation test. To see where your own numbers sit against the hours tests, you can check where your numbers stand before taking the §280A side to a CPA.
Repair days and the personal-use definition
§280A contains its own carve-out for work days. The statute provides that a day on which the taxpayer is at the unit is not a day of personal use if the principal purpose of the use that day is to perform repairs and maintenance, and the taxpayer is engaged in repair and maintenance work on a substantially full-time basis for that day. It also addresses the presence of other people who are not working: their being there does not by itself defeat the exception, provided those two conditions are met.
Two things about this exception matter. It is a day-level test: the question is what the day as a whole was for. And "substantially full time" is a demanding phrase — two hours with a wrench inside a week-long stay is not what it describes. Whether a particular day meets it turns on facts, and it is a question for your CPA or EA.
Why a work visit still needs hour-level detail
Nothing in §469 asks how §280A characterized a day. The tests are counted in hours of work performed in connection with the activity, and Treas. Reg. §1.469-5T(f)(4) deals with proof: the extent of participation may be established by any reasonable means, and daily time reports are not required where other reasonable means exist. In practice the Tax Court has read that latitude narrowly, and the records that hold up are the ones made at the time.
A day that escapes personal-use treatment because you worked substantially full time on repairs will usually also be a substantial hours day. But the §280A conclusion does not supply the hours. You still need the date, the task, the minutes and what prompted the work. The day-count record and the hour-count record are two separate files, and the second one is the one that cannot be reconstructed convincingly after the fact.
Mixed trips: family weekend plus a repair
The common case is neither a repair trip nor a vacation. It is both: you drive up Friday with the family, spend Saturday morning replacing a garbage disposal and resealing a shower pan, and drive home Monday.
On the §280A side, those are most likely days of personal use — the principal purpose of the stay was not repairs, and no day was substantially full time work. On the §469 side, the three hours of real work on Saturday are three hours of real work. Logging them is appropriate; logging the weekend is not. Travel on a trip like this is its own question, covered in does travel time count toward material participation.
Proportionality is the caution for every mixed trip. A log in which every family visit happens to contain six hours of maintenance reads as constructed, and the opinions in this area turn on whether the court believed the entries at all.
What to write down for a stay at your own property
For the trip as a whole:
- Arrival and departure dates, and the number of nights.
- Who was there, and whether anyone was a paying guest.
- Your own view of whether the nights were personal, and why.
For each piece of work inside the trip:
- Date, start and stop time, and total minutes.
- Which property, when you own more than one.
- The task, in a sentence a stranger could follow.
- What prompted it: a guest report, a scheduled service, a failed inspection.
- The outcome, including parts bought or a job handed to a contractor.
Corroboration is what turns an entry from a claim into a record: a parts receipt, a before-and-after photo, a plumber's invoice. In STR Tracker that is the file attachment on an entry, so the receipt and the photo live on the hour they belong to rather than in a folder someone has to find later.
It is also worth noting what you did not do. An owner who logs nothing for Sunday because Sunday was a beach day has written a more believable log than one with no empty days at all.
Where the counts are reported
The two counts surface in different places. Schedule E asks, per property, for fair rental days and personal use days, so the day count is reported directly. §280A(c)(5) limits deductions once a unit is used as a residence, and IRC §469(j)(10) addresses the interaction: where §280A(c)(5) applies to a dwelling unit for a year, items allocable to that use are left out of the §469 computation for that year. The passive side runs through Form 8582, and IRS Publication 925 describes how a suspended loss carries forward. There is also a de minimis rule at the other end, in §280A(g), for a unit rented fewer than 15 days in the year.
Which of these applies to your property, and how the allocation is done, is a reporting question for your preparer. Your job is to hand them two accurate counts rather than one.
Common mistakes
- Keeping hours but never recording owner stays, then being unable to answer the Schedule E question at filing time.
- Treating the repair exception as an hours rule, and assuming a short fix converts a vacation day.
- Logging the travel day as a work day because the trip contained work.
- Assuming the booking platform's calendar records owner stays. It records blocks, which may be maintenance, personal use or nothing at all.
- Claiming a whole personal day as participation hours because some work happened in it, with no hours detail behind the claim.
- Writing both records in December from memory.
The habit that solves all six is small: when you leave the property, record the nights and record the minutes, separately, before you forget which was which. If you do not have a place to put them yet, you can start a log and keep the two counts side by side from the first trip.