Barniskis v. Commissioner: bookkeeping is investor hours

By Max Medvedev · 6 Aug 2026

Two gates, and only the first one opened

The property was a short-term rental with an average stay of seven days or less, so the automatic passive label came off. The loss still failed. The hours behind it were investor-type work — bookkeeping rather than operations — and they could not exceed the participation of the management company running the property.

Barniskis v. Commissioner, T.C. Memo 1999-258, is the case that separates two questions owners routinely merge: whether the activity qualifies, and whether the hours are the right kind.

What happened

The classification was not the fight. The average stay was seven days or less, which takes the activity out of the "rental activity" definition in Reg. §1.469-1T(e)(3)(ii)(A) — the same front gate Mirch passed twenty-six years later.

What the owner brought to the second gate was the wrong currency. The claimed participation was investor-type: bookkeeping, the work of watching a holding rather than running one. And a management company was in place, which put a second individual's hours on the board — one whose participation the owner's could not beat.

Two independent failures, either of which was enough on its own.

What the court held

The loss stayed passive. Material participation under Reg. §1.469-5T(a) was not established, so the deduction could not offset non-passive income no matter how the activity was classified.

The rule underneath the first failure is Reg. §1.469-5T(f)(2)(ii): work done in the capacity of an investor does not count as participation unless the taxpayer is directly involved in the day-to-day management or operations of the activity. Reviewing financial statements, studying reports and monitoring the investment in a non-managerial capacity are the regulation's own examples of what stays out.

The second failure is the comparison in Reg. §1.469-5T(a)(3): more than 100 hours and not less than any other single individual. A management company staffs the operating work by design, which is precisely the participation the owner then has to exceed. The same structural problem decided Pohoski v. Commissioner, T.C. Memo 1998-17, in both directions, and Lucero v. Commissioner, T.C. Memo 2020-136, two decades later.

The tell

The deciding behaviour was doing the work of an owner of an investment rather than an operator of a business — and then counting it.

This is the subtlest line in the participation rules, because the same word describes work on both sides of it. "Bookkeeping" that means paying the cleaner, matching the platform payout against the deposit, chasing a chargeback and keeping the vendor file current is operations, and it counts. "Bookkeeping" that means reading the statement your manager sends, checking the yield and filing it away is investor capacity, and it never counts. The category on the log entry is not the test. What you were doing, and whether anyone else was doing the operating, is the test.

The management company is what makes the distinction bite. When a company handles guests, turnovers and maintenance, the operating hours have an owner already — and the work left for the taxpayer naturally drifts toward review, oversight and record-keeping about results. That drift is not laziness. It is the predictable consequence of the arrangement, and it produces a log full of hours that read as investor time to a court reading the same regulation.

What this means for your records

The rule that falls out has two halves, and both are decided during the year rather than at filing.

Entries have to describe the work, not the topic. "Reviewed statements — 2 hrs" is an entry that argues against itself. "Paid the cleaner's March invoice, matched February payout to deposit, filed the W-9 — 40 min," with the invoice and the bank line attached, describes operating work and shows it. The difference is not wording; it is whether an entry carries the evidence of what was actually done. Categories that never count — availability, investor review, education, market research, pure travel that is not integral to the work — belong outside the total from the start, so nothing has to be subtracted later under someone else's supervision.

The other side of the comparison has to be in the file too. A management arrangement makes the hour race harder and also more measurable: the manager's statements and invoices are the evidence of their participation, and they exist monthly. A file that carries owner hours, spouse hours under IRC §469(h)(5), and the single highest other individual's hours can answer the test as asked. A file with only one side of it cannot, however honest that side is.

Read together with Mirch, this case sets the order of operations: the average-stay math opens the door, and the hours have to be operational, real-time and larger than the manager's to walk through it. The seven-day test covers the first half; the cluster hub, how to prove your short-term rental hours, covers the second.

Test the hours you actually have

Run your hours through the estimator — it separates operating hours from the categories that never count, scores them against the highest-hour vendor, and cites the regulation behind each exclusion.