A conversion has a date, and that date does most of the work. Hours spent on a house that is still your home are generally not participation in a rental trade or business, because the activity does not exist yet; hours after the property is ready and available to guests are ordinary operating hours. The block in between — the repainting, the furnishing, the listing — is the part your log has to keep separate, because your preparer will need to see it on its own.
The conversion date is the hinge
Nothing in IRC §469 or Treas. Reg. §1.469-5T defines a "conversion date". The marker most preparers reach for comes from depreciation: IRS Publication 527 and Publication 946 describe property as placed in service when it is ready and available for its intended use, which for a rental generally means furnished, licensed where required, listed and open to bookings — not necessarily occupied.
That date is worth pinning down with documents rather than memory, because several things turn on it. The evidence usually already exists:
- The day you moved out, and where you moved to
- The day the listing went live, from the platform's own record
- Short-term rental permit, lodging tax registration or HOA approval dates
- The switch from a homeowner's policy to a landlord or short-term rental policy
- Utility account changes, lock or keypad installation, the first booking window
Keep those in one place. Placed-in-service timing is a position your preparer takes on the facts, not a figure you can compute, and it usually becomes contested because the owner cannot say which week anything happened.
Work done while it was still your home
The hours you put into a house you were living in generally do not count toward the material participation tests, however much the work resembled rental work. Repainting a bedroom you slept in, replacing a water heater you showered under, packing and moving your own furniture out, cleaning for your own departure — these are personal activities, and the tests in Treas. Reg. §1.469-5T measure participation in an activity that is being carried on.
This catches people out because the work is often substantial and recent. An owner who spent the spring renovating the house they lived in, then listed it in July, has a demanding first year and very little of it countable before July. Whether that spending adds to basis is a separate question, and one for your CPA or EA. For the hours log the rule is simpler: do not backfill your own residence into it.
Getting it ready to rent is its own bucket
Between moving out and opening to guests sits the readying work — furnishing rooms, writing the listing, photographing, installing the lock, meeting the permit inspector. Whether hours like these count is genuinely unsettled; neither Treas. Reg. §1.469-5T nor IRS Publication 925 says when a rental activity begins, and practitioners differ. We covered the arguments in do setup hours before your first guest count.
Log them, label them, and keep them in a block your preparer can include or exclude without rebuilding anything. A log that separates pre-opening hours from operating hours supports either position. A log that quietly blends them supports neither, because nobody can tell afterwards which hours were which.
Available for rent, but not yet rented
Once the property is ready and available, the gap before the first guest is still operating time. Hours spent on pricing, answering inquiries, meeting the cleaner, fixing what the walkthrough revealed and keeping the place presentable are hours in a business that is open. A listing that sits empty for three weeks is still in service.
What that stretch does not do is produce days of customer use, which matters for the test below. A conversion year often shows a reasonable hour count and a thin booking record, and those two facts are measured separately.
A partial year and the seven-day average
Short-term rentals matter for hours at all because of Treas. Reg. §1.469-1T(e)(3)(ii)(A): when the average period of customer use for the year is seven days or less, the activity is not treated as a rental activity, and it gets tested like any other trade or business. The computation in §1.469-1T(e)(3)(iii) divides the aggregate number of days of customer use by the number of periods of customer use.
In a partial year that arithmetic is fragile, because the denominator is small. Four weekend stays and one three-week booking in a two-month season produce an average well above seven days, where the same mix across a full year might not. Our guide to the average stay test walks through the mechanics, and the figure itself comes from your booking platform's reservation record — the app does not calculate it.
Two things about a partial year surprise owners:
- The hour thresholds are not prorated. The regulation's tests ask for more than 500 hours, or more than 100 hours with no other individual participating more, for the taxable year. A four-month season still faces the annual number.
- The average-stay test and the hours tests are independent. Clearing one in a conversion year does not substitute for the other.
If you want to see where a short first season leaves you, the loophole checker will show which tests your numbers are near.
Personal-use days on both sides of the line
A converted home is the classic case where personal use is not just bookkeeping. IRC §469(j)(10) provides that where a passive activity involves the use of a dwelling unit to which §280A(c)(5) applies for the year, the income, deductions, gain or loss allocable to that use are left out of the passive activity computation for that year. In other words, enough personal use of the unit can change what §469 is even looking at.
IRC §280A has its own day counting, and a conversion year raises the obvious question of whether the months you lived there count as personal-use days. There is a special rule for a principal residence that is rented out — §280A(d)(4), which can keep days outside a qualified rental period from being treated as personal use when the rental period is long enough — and whether it reaches your facts depends on the length and continuity of the rental period. That is a question for your CPA before the return is prepared, not something to assume in either direction.
One day-counting rule bears directly on your log: the statute generally does not treat a day as a personal-use day when you are at the property working substantially full time on repairs and maintenance. A repair day you can describe and time is a different thing from a visit you cannot. Record the move-out date, every night you or a family member stayed after the conversion, and every work day at the property with what you did and for how long.
What the first partial year needs in the log
For a conversion year, the record wants a little more structure than a normal year:
| Period | What to capture |
|---|---|
| While it was your home | Nothing in the hours log; keep receipts separately for your preparer |
| Move-out to ready-and-available | Readying hours in a clearly labeled pre-opening block |
| Ready-and-available onward | Ordinary operating hours, per property, with other participants' hours |
| Any owner or family stays | Dates and nights, kept with the log, not in your head |
Write entries as the work happens, with the date, the property, the specific task and the minutes. "Worked on the house" does not survive review; "installed keypad lock and tested guest codes, 45 minutes" does.
Because a conversion year is not a calendar year, print it as what it is. STR Tracker's export takes a custom From and To date rather than only a tax year, so the first season can be exported as its own report with the pre-opening block visible separately. If you are converting now and starting a log from the move-out date, set the property up before you reconstruct anything, so entries land against the right property from day one.
The hinge is the date, and the date is a question of fact. Document it while the documents are easy to find and keep the three periods apart in the log, and the conversation with your preparer in the spring becomes a short one.