Every email took exactly twelve minutes.

A married couple ran a law practice together in Reno, both attorneys, and one of them also a CPA with a master's degree in tax law. They owned two rentals, a student property in Rhode Island and a short term vacation rental in Nevada, and claimed real estate professional status so the rental losses could offset their law firm income.

When the IRS pressed, the proof came down to a single undated log built from standardized blocks of time. Every email was recorded as twelve minutes to read and twelve minutes to send. Every guest turnover was recorded as seven hours of cleaning, whether the stay lasted one night or fourteen. On top of that sat eight hours of on call site management for every day the property was rented, which added up to 744.5 claimed hours by itself.

The court took the log apart. The cleaning hours were not credible, in part because the same returns deducted professional cleaning fees. The on call time counted for nothing, since only time actually spent on the activity counts. What survived fell short of the 750 hours the statute requires for real estate professional status, and short even of the 100 hours needed for the fallback test on the vacation rental. The losses were passive, the carryback built on them was gone, and the federal tax lien stood.

The opinion did not soften any of it. The couple contested nearly everything, and the court answered that they "unnecessarily complicated and prolonged resolution of this case with baseless arguments." What they never produced was the one thing that would have won, a record kept while the work was happening.

Two law degrees, a CPA license, and a master's in taxation did not change the outcome, and that is the real lesson. Credentials do not substantiate hours. A contemporaneous log does, with entries made at the time, real durations instead of standardized blocks, and something that corroborates the busiest claims, like calendars, messages, or receipts that line up with the story.