Maine tax deadlines in 2025: filing dates and estimated payments
Deadlines that fall in calendar 2025: the 2024 return and the 2025 estimated payments. Different year? See Maine 2026 →
Maine deadlines in 2025
| 2024 individual return due | April 15, 2025 |
|---|---|
| Extended filing deadline | October 15, 2025 |
| Payment due | April 15, 2025, extension or not |
| Final 2024 estimated payment | January 15, 2025 |
| 2025 estimated payments | April 15, 2025 · June 15, 2025 · September 15, 2025 · January 15, 2026 |
Conforms to April 15. Patriots' Day (3rd Monday of April, a Maine holiday) pushes the deadline in some years; for the 2025 tax year (filed 2026) it remains April 15. Automatic 6-month extension if 90% of tax is paid.
Maine estimated tax payments in 2025
Maine estimated payments for the 2025 tax year follow the standard schedule: April 15, 2025, June 15, 2025, September 15, 2025, January 15, 2026. Confirm the current-year voucher and any state-specific threshold with the Maine tax agency.
Source: maine.gov.
Maine extensions
An extension moves the Maine filing deadline to October 15, 2025. It does not move the payment date: pay what you expect to owe by April 15, 2025. Confirm with the Maine tax agency whether the federal extension is honored automatically or a state form is required.
Federal deadlines in 2025
| 2024 Form 1040 | April 15, 2025 · extension October 15, 2025 |
|---|---|
| 2024 S-corp (1120-S) & partnership (1065) | March 17, 2025 |
| 2024 C-corp (Form 1120) | April 15, 2025 |
| 2025 federal estimated payments (1040-ES) | April 15, 2025 · June 16, 2025 · September 15, 2025 · January 15, 2026 |
Source: IRS Publication 509 and Form 1040-ES instructions, irs.gov.
Frequently asked questions
When are Maine state taxes due in 2025?
Your 2024 Maine individual income tax return is due April 15, 2025. If that date falls on a weekend or legal holiday, the deadline moves to the next business day. An extension moves the filing deadline to October 15, 2025, but any tax owed is still due on the original date.
When are Maine estimated tax payments due in 2025?
Maine estimated payments for the 2025 tax year are due April 15, 2025, June 15, 2025, September 15, 2025, January 15, 2026. The final installment for 2024 was due January 15, 2025.
Does Maine accept the federal extension?
An extension moves the Maine filing deadline to October 15, 2025. It does not extend the time to pay: pay what you expect to owe by April 15, 2025 to avoid penalties and interest.
Does a Maine extension give me more time to pay?
No. An extension extends the time to file, not to pay. To avoid penalties and interest, pay what you expect to owe by April 15, 2025.
Dates are the statutory deadlines that fall in 2025 and move to the next business day when they land on a weekend or holiday. Each section links to the source it was checked against. Always confirm with the Maine tax agency or the IRS before relying on a date. This is general information, not tax advice.