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Catch-Up Depreciation & Form 3115
Most owners discover cost segregation years after closing. The good news: the study can go back to the year you placed the property in service, and prior-year missed depreciation flows through as a one-time catch-up deduction on your current return via Form 3115 — you do not amend a single old return.
What you get
- ✓Full study methodology applied to prior years
- ✓Year-by-year catch-up calculation since placed in service
- ✓Form 3115 prepared, reviewable by your CPA
- ✓No amended prior-year returns
- ✓Adjusted basis tracking so future sale math stays clean
How it works
1
Confirm the in-service date
Closing statement, first lease, or utility start — we help you establish it.
2
Retro study
The same engineered methodology, applied to every year you have owned the property.
3
One return, one form
CPA e-files Form 3115 with your current-year return. Catch-up deduction, no amendments.
Who it's for
Anyone who owned before their first studyOwners who “forgot” a rental placed in service years agoInherited or newly converted primary→rental properties →
How far back can I go?
To the year the property was placed in service — even 10+ years ago. There is no amended-return lookback; Form 3115 makes the change on the current return.
Does the catch-up trigger an audit?
Cost-segregation §481(a) catch-ups are common and accepted when documentation is solid. Our studies follow the IRS Cost Segregation Audit Technique Guide, and audit support is included.
Will my accountant have to do extra work?
Minimal — they receive the completed Form 3115 package plus the asset schedule and we answer their engineering questions directly, free.
Compare tiers before you commit
Rapid vs. Quick™ vs. Full Engineered — side by side, with honest recommendations for your property type.