Nonprofit Tax Deadlines in Maine
Federal and state filing dates, extensions, and estimate schedules for 2026.
Maine filing deadline
Nonprofit annual return generally due the 15th day of the 5th month.
Due: May 15, 2026
Extension: Nov 15, 2026
Form: State nonprofit return
Estimated payments
No state estimated payment schedule listed.
Due: N/A
FAQ
Does Maine require Nonprofit estimated payments?
Estimated payments are not typically required at the entity level, but confirm with Maine Revenue Services.
Where can I file Maine Nonprofit taxes?
Use Maine Revenue Services resources at https://www.maine.gov/revenue for forms and filing instructions.