The most-litigated tax issue for rental owners is whether something you spent is a repair (deduct it this year) or an improvement (capitalize and spread the deduction over 27.5 years). The dollars between “all now” and “a little each year for 27.5 years” are real, and the rules are not as fuzzy as people assume.
Repairs (deductible now)
- Patching a hole in the wall
- Replacing a broken window or faucet
- Fixing a section of damaged roof (not the whole roof)
- Painting (interior repaint, exterior repaint)
- Pressure-washing, gutter cleaning, ordinary upkeep
- Repairing a section of fence, driveway, or sidewalk
Improvements (capitalize and depreciate)
- New roof over the whole building
- Full HVAC system replacement
- Kitchen or bathroom renovation (cabinets, counters, fixtures, plumbing)
- Adding a room, deck, or garage
- Replacing all the windows, all the flooring, all the doors
- Conversion from rental to office use, or single-family to multi-family
The "system" trap
The IRS doesn’t look at a roof as one piece; it looks at it as part of the “building structure.” Replacing 30% of the roof is a repair. Replacing the whole roof is an improvement to the building structure. Same logic for HVAC, plumbing, electrical, elevators. If you’re replacing a major component of one of the building’s “systems,” the IRS treats it as an improvement even if you’d describe it as a repair in plain English.
The "like new" trap
If a property is in such bad shape that you’re bringing it back to a like-new condition, the whole project is a Restoration even if every individual piece sounds like a repair. Buy a beat-up rental, rehab it head to toe before placing in service: capitalize it. The work isn’t fixing damage; it’s preparing the property for use as a rental.
How the safe harbors interact
The safe harbors override the BAR test for amounts inside the safe-harbor thresholds. The small taxpayer safe harbor lets you deduct up to $10K (or 2% of building basis) of all spending each year. The routine maintenance safe harbor lets you deduct recurring work. The de minimis safe harbor lets you deduct individual items under $2,500 (or $5,000 with audited financials). Stack them properly and the “is this a repair or an improvement” question only matters on the bigger jobs.
Documentation
Invoices that describe the work in detail beat invoices that say “repair $4,200.” A photo of the old roof and the work zone, and a note in the file explaining why you treated the work as a repair, are what wins this argument when an examiner walks in two years later.