Maine Filing Due Date: State individual income tax returns are due by April 15, in most years — or by the 15^th day of the 4^th month following the end of the taxable year (for fiscal year filers).

Extended Deadline with Maine Tax Extension: Maine offers a 6-month extension, which moves the filing deadline from April 15 to October 15 (for calendar year filers).

Maine Tax Extension Form: Maine’s tax extension is automatic, so there’s no official application or written request to submit. You will automatically receive a Maine extension as long as you meet the state’s payment requirement (see below).

Maine Extension Payment Requirement: An extension of time to file is not an extension of time to pay your Maine income tax. All state tax payments are due by the original deadline of the return. Any Maine tax that isn’t paid on time will be subject to interest and penalties. In order to receive an automatic extension for your Maine tax return, you must pay at least 90% of your state tax liability by the original due date. You can make a Maine extension payment with Form 1040EXT-ME, or pay electronically through Maine’s “EZ Pay” Internet Payment System: portal.maine.gov/ezpay