Yes for material participation, no for the 750-hour test. Under IRC §469(h)(5) and Treas. Reg. §1.469-5T(f)(3), a spouse's participation in an activity is generally taken into account as the taxpayer's own participation, whether or not the spouse owns an interest in the activity and whether or not the couple files a joint return. Real estate professional status runs the other way: §469(c)(7)(B) asks each spouse to clear the 750-hour and more-than-half-of-personal-services thresholds individually. One log with two names on the entries is what lets a preparer compute both numbers from the same record.
Two rules, two answers
The confusion is understandable, because §469 contains two separate hour counts and they treat couples differently.
Material participation is the set of tests in Treas. Reg. §1.469-5T(a) — 500 hours, substantially all of the participation, 100 hours and more than any other individual, and the rest. Spousal participation is folded in for all of them. A household that records 60 hours for one spouse and 55 for the other has 115 hours for the 100-hour test.
Real estate professional status under §469(c)(7) requires more than 750 hours in real property trades or businesses and more than half of all personal services performed during the year. The statute provides that on a joint return the requirements are met only if one spouse separately satisfies them. The same household above has 115 combined hours and nobody near 750, so REPS is not in reach on those numbers.
IRS Publication 925 describes both counts. For most short-term rental owners the relevant one is material participation, because an average stay of seven days or less takes the property outside the definition of a rental activity in Treas. Reg. §1.469-1T(e)(3), which is why REPS is not needed in the first place. The 750-hour test guide sets out that second count in detail, and the spouse hours guide covers the attribution rule.
Log by person, always
A single household total is a lossy record. Once two people's work is merged into one number, no amount of later effort separates it again, and several questions need it separated:
- The 750-hour count, if it ever becomes relevant, is individual.
- The 100-hour test compares the taxpayer's hours to each other individual's hours. A preparer needs to see whose side each hour sits on.
- An examiner reading a turnover entry asks who was at the property. "One of us" is a weak answer three years later.
So record the person on every entry, from the first one, even when you are certain the combined total is all anyone will ever ask for. In STR Tracker each entry is tagged to taxpayer or spouse, and the per-property reports show both individual totals and the combined figure, so the split is preserved without anyone keeping two files.
A division of labor that documents itself
Couples tend to split short-term rental work along lines that are already visible in other records. Leaning into that makes the log easier to corroborate.
| Task | Usually falls to | Natural corroboration |
|---|---|---|
| Guest messaging and inquiries | Whoever has the app | Platform message timestamps |
| Turnovers and restocking | Whoever is closer | Supply receipts, mileage |
| Repairs and vendor meetings | The handier one | Parts receipts, invoices |
| Pricing, listing, calendar | The spreadsheet one | Rate change history |
| Bookkeeping for the activity | Either | Bank and ledger dates |
The pattern that causes trouble is the opposite one: both spouses claiming the same task on the same day. Two people, four hours each, for one three-hour turnover is the kind of entry that invites scrutiny of everything around it. If both of you genuinely worked the turnover, say what each of you did, and keep the total proportionate to the job.
Filing status and ownership, briefly
The attribution rule in §469(h)(5) is written broadly — it does not require the spouse to own an interest, and it applies whether or not a joint return is filed. Ownership structure, community property rules, a property held in one spouse's name or inside an LLC, and the choice to file separately all interact with how the activity and its losses are reported, and they can change the analysis in ways this post cannot resolve. Bring the ownership documents and both hour totals to a CPA or EA and ask how the attribution applies to your specific facts.
The comparison prong when both of you host
The second half of the 100-hour test is where couples most often get caught. The household's combined hours have to exceed 100 and exceed the hours of every other individual who participated. A cleaner at 130 hours still beats a couple at 115.
Combining helps on that comparison, because both spouses sit on the taxpayer's side of it. What it does not do is remove the need to know the other participants' numbers. Cleaners, co-hosts, handymen and the neighbor who handles lockouts all belong in the record with their own hours, and the co-host post explains how to get a defensible figure for someone who is not keeping a log.
Unmarried partners are a different case entirely. There is no attribution between them. Each person's hours stand alone, and a partner who does more of the work than the owner does is on the other side of the comparison, not the same side. Couples who are not married should read the co-host rules as applying to them.
A fifteen-minute monthly review
The failure mode for couples is not dishonesty, it is drift: one spouse logs diligently, the other means to and does not, and by November half the household's work is missing. A short standing appointment fixes it.
Once a month, together:
- Each person adds anything missing from their own entries, with the date it happened.
- Compare the two totals against the calendar. A month with six turnovers and two hours logged is a month with missing entries.
- Update the other participants' hours — cleaner, co-host, contractor.
- Check the combined total against whichever test the property is aiming at, and note the gap.
- Confirm the average stay figure on the booking platform if the property is relying on the seven-day rule.
Writing entries in the month they happened is what makes the record contemporaneous, which is the quality the Tax Court has repeatedly cared about more than volume.
Setting up for two phones
Two people entering hours on two devices needs a little structure at the start of the year.
- Decide who logs what, so the same task is not entered twice. Guest messaging to one person, turnovers to whoever drove.
- Agree on a naming habit for entries. "Turnover, unit 2, 2 hrs, stripped beds and reset kitchen" beats "cleaning".
- Set a same-day habit. An entry written that evening is contemporaneous; one written in March is a reconstruction.
- Keep receipts and photos attached to the entry they belong to rather than in a shared photo album.
- Give the year-end export to your preparer as one file with both names on it.
None of this is complicated. It is mostly a decision, made in January, that both people's time is going to be written down by the person who spent it, on the day they spent it. That habit is what a couple actually has to show when someone asks how the household reached its hours. Start a log for both of you and let the record do the arguing.