The single biggest thing that decides whether Real Estate Professional Status holds up is not whether you did the hours. It is whether you can prove them. The 750-hour test and the material participation piece both come down to time, and time is only worth anything to the IRS if you documented it. So the practical question is not "did I work enough," it is "can I hand an auditor a record that stands."
The good news: the standard is more reasonable than people fear. The bad news: most investors reconstruct their hours the week before they file, and a reconstruction is the weakest possible version of proof.
What the IRS actually requires
The recordkeeping rule lives in Treasury Regulation 1.469-5T(f)(4). It governs how you establish material participation, which is the hours side of the whole REPS question. The regulation does not demand a stopwatch or a punch clock. It says participation may be established by any reasonable means.
In plain terms: a log works. A contemporaneous log of your hours, kept as you go, is exactly what I recommend and exactly what you want to hand the IRS if they come asking. A calendar works too, because it independently shows where you were and what you were doing on a given day.
The move that makes your record nearly bulletproof
Use both. A log and a calendar together beat either one alone, because they corroborate each other. The log says you spent three hours managing a turnover on the 14th. The calendar shows the 14th blocked for that property. Two independent records pointing at the same facts are far harder to wave away than one.
That is the whole game with an audit: you want to be the person who says "here you go, read it, I counted my hours, I have proof." Not the person promising the hours were real but reconstructing them from memory and bank statements after the fact.
Log as you go, not in April
The word that matters in the regulation is reasonable, but the word that matters in practice is contemporaneous. Hours you record the day you work them are credible. Hours you assemble months later, from receipts and guesswork, are the first thing an auditor probes, because everyone's memory conveniently rounds up.
This is exactly why REPS Time exists. It is built to log the qualifying hours against the 750-hour test as you work them, with timestamps, so the record is contemporaneous by design instead of a scramble at tax time. Pair the app's log with your existing calendar and you have the two-source record the regulation rewards. If you want to go deeper, the recordkeeping standard itself is worth reading in Treasury Regulation 1.469-5T(f)(4).
One caveat worth stating plainly: logging the hours is necessary, but the hours also have to be the kind that count. A perfect record of non-qualifying activity still fails the test. Track the right work, track it as you go, and back it with a calendar.
This is educational, not tax advice. Your CPA confirms how the recordkeeping standard applies to your situation.
