Why hour tracking matters
Tax Court cases have established a clear pattern: taxpayers who cannot produce detailed, contemporaneous logs lose their REPS claims. In Moss v. Commissioner (T.C. Memo 2017-90), the court disallowed a taxpayer's real estate professional status because his activity log was created after the fact and lacked sufficient detail. This happens repeatedly.
The IRS doesn't prescribe an exact format, but they expect records that are: (1) made at or near the time of the activity, (2) specific about what was done, and (3) detailed enough to support the claimed hours. Vague entries like “property management—4 hours” invite scrutiny. Entries like “Coordinated furnace repair with HVAC vendor for 123 Main St, exchanged 3 emails and scheduled appointment—45 minutes” hold up.