S Corporation Tax Deadlines in Iowa
Federal and state filing dates, extensions, and estimate schedules for 2026.
Iowa filing deadline
Calendar-year due date follows federal timing for pass-through entities.
Due: Mar 16, 2026
Extension: Sep 15, 2026
Form: State business income tax return
Estimated payments
No state estimated payment schedule listed.
Due: N/A
FAQ
Does Iowa require S Corporation estimated payments?
Estimated payments are not typically required at the entity level, but confirm with Iowa Department of Revenue.
Where can I file Iowa S Corporation taxes?
Use Iowa Department of Revenue resources at https://tax.iowa.gov for forms and filing instructions.