Deadlines by entity
Calendar-year entities:
- S-corp (1120-S): March 15, extended to September 15
- Partnership (1065): March 15, extended to September 15
- C-corp (1120): April 15, extended to October 15
- Trust (1041): April 15, extended to September 30
Common questions
- Does the entity extension extend owner personal returns?
- No. Owners still file their personal returns by April 15 or extend separately. Missing K-1s due to late entity filing can leave owners scrambling.