Past projects

Built or bought something between 2005 and 2025? You can still claim it this year.

Pick the year it was placed in service. We show the catch-up you missed, claimed on your 2026 return with Form 3115. No amended returns.

Several properties? Run the first one, then add the rest to the same free study.

Missed years

Depreciation you could have taken

One catch-up

Taken together this year

No amending

Old returns stay as filed

Check a past project

Updates as you type. No email.

Property type

Search every type, like “townhomes” or “self-storage”.

How did you get it?

Construction cost, including land

Include land. We take it out for you.

Year it was placed in service

A past year is fine: the missed depreciation comes back this year with Form 3115. No amended returns.

Adjust assumptions

State

Working it out...

Free study: one sitting, about 20 minutes. Stop and come back any time.

Questions

Do I have to amend old returns?: No. When two or more returns are already filed, the depreciation you missed is taken all at once on this year's return. Your CPA files Form 3115 with it.
What if only last year's return is filed?: Then your CPA can usually amend that one return instead. The estimate says which applies when you pick the year.
What does my CPA get?: The study, a draft Form 3115 and the catch-up schedule (the 481(a) adjustment), plus the asset detail for the depreciation software.
Does it work for homes I sold?: No. Homes and lots you sell are inventory, which is never depreciated. Their value is in inventory cost rules and the energy credit for homes sold before July 1, 2026.

Your CPA gets the catch-up schedule

Year by year, ready to file with this year's return.