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Iowa Tax Deadlines at a Glance (2026)
Entity Type | Return Due | Extension Deadline |
|---|---|---|
Individuals | April 30, 2026 | October 31, 2026 |
C Corporations | April 30, 2026 | October 31, 2026 |
S Corporations | April 30, 2026 | October 31, 2026 |
Partnerships | April 30, 2026 | October 31, 2026 |
Key Difference
Iowa deadlines are later than federal. Iowa pass-through entities (S corporations and partnerships) follow the last day of the 4th month rule, the same as Iowa individual and C-corporation returns, rather than the federal March pass-through date.