A contemporaneous log is a real-time record of the hours you spend on real estate activities, created at or near the time the work is performed. The IRS requires this documentation to prove material participation under IRC Section 469, and without it, your Real Estate Professional Status (REPS) claim, along with potentially hundreds of thousands of dollars in passive loss deductions, can be disallowed entirely.
If you're a real estate investor claiming REPS or using the STR loophole, keeping a proper contemporaneous log isn't optional. It's the single most important piece of documentation you'll need if the IRS questions your return.
What Is a Contemporaneous Log?
A contemporaneous log is a detailed, date-stamped record of every hour you spend on qualifying real estate activities. The word "contemporaneous" is critical. It means the log was created at or near the time the activity occurred, not reconstructed months or years later during an audit.
The Tax Court has repeatedly upheld this standard. In Pohoski v. Commissioner (T.C. Memo 1998-17), the court denied REPS status because the taxpayer's logs were "prepared in anticipation of litigation" rather than maintained in real time. Conversely, in Hailstock v. Commissioner (T.C. Memo 2016-146), the court accepted a taxpayer's REPS claim based on detailed contemporaneous records that documented daily activities.
Why "Contemporaneous" Matters
The IRS draws a hard line between two types of records:
Contemporaneous records (accepted by the IRS):
- Created on the same day or within 1-2 days of the activity
- Include specific dates, times, durations, and activity descriptions
- Show a consistent pattern of record-keeping throughout the year
Reconstructed records (frequently rejected):
- Created weeks, months, or years after the activity
- Often lack specific details about individual days
- Typically produced only after receiving an IRS audit notice
Under Treas. Reg. Section 1.469-5T(f)(4), taxpayers may establish material participation using "any reasonable means." However, the IRS and Tax Court have consistently interpreted this to favor contemporaneous documentation over after-the-fact reconstruction.
What Must Your Log Include?
Every entry in your contemporaneous log should capture five key data points:
1. Date
The exact calendar date the activity was performed. Don't batch entries by week or month. Each day should have its own line items.
2. Time In / Time Out
The specific start and end times for each work session. For example: "9:15 AM to 11:45 AM" rather than "about 2.5 hours in the morning."
3. Duration
The total hours and minutes for the session. This should mathematically match your time in/time out entries.
4. Activity Description
A specific, detailed description of what you did. The IRS wants to see exactly what real estate activity was performed.
Good descriptions:
- "Reviewed 3 tenant applications for Unit 4B at 123 Main St; called references for top candidate"
- "Met with contractor at 456 Oak Ave to review kitchen renovation scope and get bid"
- "Drove to 789 Elm St to inspect water heater replacement; approved invoice from ABC Plumbing"
Bad descriptions:
- "Property management"
- "Worked on rentals"
- "Real estate stuff"
5. Property Identification
Which specific property (or properties) the work relates to. Use addresses or property names consistently throughout your log.
The 750-Hour Threshold
For REPS qualification, you must document more than 750 hours of material participation in real property trades or businesses during the tax year. You must also spend more time on real estate activities than on any other single trade or business (the 50% test).
That breaks down to roughly:
- 14.5 hours per week if you work 52 weeks
- 16.7 hours per week if you take 3 weeks of vacation
- 2.1 hours per day every day of the year
These aren't impossible numbers, but they require consistent tracking. Missing a week of logging can mean losing 15+ hours of documentation, hours the IRS will assume didn't happen.
What Activities Count Toward Material Participation?
Under the seven tests for material participation (Treas. Reg. Section 1.469-5T), qualifying real estate activities include:
Property Management & Operations
- Tenant screening, lease signing, and rent collection
- Handling maintenance requests and repair coordination
- Property inspections (move-in, move-out, routine)
- Communicating with tenants about lease terms or issues
Acquisition & Disposition
- Researching potential investment properties
- Touring properties and analyzing deals
- Negotiating purchase agreements
- Managing 1031 exchanges or property sales
Financial & Administrative
- Bookkeeping for rental properties
- Reviewing financial statements and P&L reports
- Meeting with CPAs, attorneys, or financial advisors about real estate
- Preparing tax documents related to properties
Construction & Renovation
- Overseeing rehab or renovation projects
- Meeting with contractors and reviewing bids
- Selecting materials, fixtures, and finishes
- Inspecting completed work
Education & Professional Development
- Attending real estate investing seminars or conferences
- Studying market reports and analyzing neighborhoods
- Networking with other real estate professionals
- Reading industry publications (with real estate application)
What Does NOT Count
- Investor-type activities (reviewing financial statements as a passive investor)
- Travel time to and from properties (debatable; some Tax Court decisions allow it, others don't; log it separately)
- Time spent on personal residence maintenance
- Activities for properties you don't own or manage
How to Structure Your Log
Option 1: Digital App (Recommended)
The most audit-proof approach is using a purpose-built tracking app like REPS Time, which creates timestamped, GPS-verified entries that can't be backdated. Digital logs with automatic timestamps are significantly harder for the IRS to challenge compared to handwritten records.
Key advantages of digital logging:
- Automatic date/time stamps that prove contemporaneous creation
- GPS verification of property visits
- Categorized activity types for consistent descriptions
- Exportable reports in IRS-friendly formats
- Cloud backup prevents data loss
Option 2: Spreadsheet
If you prefer a manual approach, create a spreadsheet with columns for Date, Time In, Time Out, Hours, Property, Activity Description, and Category. Save the file frequently. The file metadata (creation date, modification dates) can serve as evidence of contemporaneous recording.
Option 3: Calendar-Based Logging
Some investors use Google Calendar or Outlook to log real estate hours as calendar events. This can work, but make sure each entry includes sufficient detail in the description field, not just "real estate work."
Common Mistakes That Get Logs Rejected
1. Round Numbers
Logging exactly 4.0 hours every day looks fabricated. Real work sessions have irregular durations: 2 hours 15 minutes, 3 hours 40 minutes, etc. The IRS knows this.
2. Identical Descriptions
Using the same description for multiple days ("property management, various tasks") signals that entries were batch-created rather than recorded in real time.
3. Gaps Followed by Catch-Up Entries
If your log shows no entries for two weeks followed by a single day with 30 hours of back-entered data, the IRS will flag this as reconstructed.
4. No Separation Between Properties
If you own multiple properties and use a grouping election, you still need to document which activities relate to which properties. The grouping election aggregates hours for the material participation test but doesn't eliminate the need for property-level detail.
5. Exceeding Reasonable Hours
Claiming 18 hours per day, 7 days per week isn't credible. Even dedicated full-time real estate professionals rarely exceed 2,500 to 3,000 hours per year. If your log shows 4,000+ hours, expect scrutiny.
What Happens During an IRS Audit
If the IRS audits your REPS claim, here's the typical process:
Document Request: The IRS will request your contemporaneous time log, along with supporting documentation (receipts, emails, contractor invoices, photos).
Corroboration: They'll cross-reference your log entries with third-party evidence. Did you actually visit that property on that date? Do contractor invoices match your claimed renovation oversight hours?
Credibility Assessment: The auditor evaluates whether your log appears genuine and contemporaneous, or reconstructed after the fact.
Hour Calculation: They'll total your qualifying hours and verify you exceed the 750-hour threshold and the 50% test.
The best defense is a boring, consistent, detailed log that matches your real activities. REPS Time generates audit-ready reports that present your hours in the format IRS auditors expect to see.
Frequently Asked Questions
Can I reconstruct my log if I didn't keep one during the year?
Technically, Treas. Reg. Section 1.469-5T(f)(4) allows "any reasonable means" to prove material participation. However, the Tax Court has consistently given less weight to reconstructed records. In Goshorn v. Commissioner (T.C. Memo 1993-578), the court rejected a post-hoc log as insufficient. Your best approach: start logging today, even if you're mid-year. A partial contemporaneous log is far better than a fully reconstructed one.
How long should I keep my material participation logs?
Keep your logs for at least 7 years after filing the return. The IRS can audit returns up to 3 years after filing (6 years if they suspect substantial underreporting), and you'll want records available for the entire statute of limitations period.
Do both spouses need to keep separate logs?
If both spouses are claiming REPS, each must independently meet the 750-hour and 50% tests with their own documented hours. One spouse's hours cannot be attributed to the other for REPS qualification (though they can for the material participation test on individual activities under certain circumstances). Learn more in our spouse REPS strategy guide.
Is a calendar or day planner sufficient as a contemporaneous log?
It can be, but only if each entry includes sufficient detail: date, duration, specific activity, and property. A calendar entry that just says "rentals" won't hold up. The IRS wants to see what you did, for how long, and at which property.
What if I use a property manager? Can I still claim material participation hours?
Yes, but only for the hours YOU personally spend on real estate activities. Your property manager's hours don't count toward your material participation total. Activities like overseeing the manager, reviewing reports, making strategic decisions, and handling owner-level tasks all count. If you're an STR investor, see our STR Loophole guide for specific rules. You can also read our guide on qualifying for REPS with a property manager.
Start Tracking Today
REPS Time is the only app built specifically for tracking Real Estate Professional Status hours. Take our free REPS quiz to see if you might qualify, then start your free trial and create audit-ready contemporaneous logs automatically.
Related Articles:
- The 7 Material Participation Tests Every Investor Should Know
- The REPS Grouping Election Explained
- Can You Qualify for REPS With a Full-Time Job?
- Can Both Spouses Qualify for REPS?
- How to Log Other Employment Hours for REPS
- The Stay-at-Home Parent's REPS Roadmap
Cross-Site Resources:
- STR Hours - Track Short-Term Rental Material Participation
- Kids Payroll - Pay Your Kids Through Your Real Estate Business
Disclaimer: This article is for informational purposes only and does not constitute tax, legal, or accounting advice. Consult a qualified CPA or tax advisor about your specific situation.
