If you earned income from Maine sources during the year but live somewhere else, Maine nonresident filing requirements generally obligate you to file Form 1040ME whenever that income produces any Maine tax liability, or whenever you want back Maine tax that was withheld from your pay or sent in as estimated payments. Maine taxes only the share of your income connected to the state, but it taxes it at the same graduated rates residents pay, topping out at 7.15% for 2026.
Who Has to File
The baseline rule is simple. Every nonresident with a Maine income tax liability for the year files Form 1040ME. You also file if Maine tax was withheld from wages or paid in as estimated tax and you want any of it refunded.
Maine carves out one narrow exception for brief, low-dollar work. A nonresident employee is not required to file if they work in Maine for 12 or fewer days and earn no more than $3,000 from all Maine sources during the year. Up to 24 additional days of certain ancillary personal services, like attending a training session or conducting a site inspection, do not count against the 12-day limit. A parallel exception covers nonresidents present for non-regular business activities: no more than 12 days on business that is not systematic or routine, and $3,000 or less in earnings. Cross either line, on days or dollars, and the exception disappears entirely. You then have to report all of your Maine-source income.
Whether your Maine-source income actually produces a tax liability depends on how it compares to your prorated standard deduction and personal exemption. For 2026, the Maine standard deduction is $15,300 for single filers and $30,600 for married couples filing jointly. The personal exemption is $5,300. Both amounts get prorated by the ratio of your Maine income to your total income, so if only a small slice of your income is from Maine, only a small slice of the deduction and exemption is yours to use.
What Counts as Maine-Source Income
Maine’s sourcing rules sweep in three broad categories.
- Services physically performed in Maine. Wages, salary, and self-employment income for work done in the state. Maine does not follow a convenience-of-the-employer rule, so telecommuting from another state for a Maine-based employer is generally sourced to where you sit, not to Maine.
- Real and tangible property located in Maine. Rental income, capital gains on the sale of Maine real estate, and income from tangible personal property in the state. Length of ownership does not matter.
- Business activity in Maine. Income from a sole proprietorship, partnership, LLC, or S corporation conducting business in the state, including your distributive share of a pass-through entity’s Maine-source income even if you never set foot in Maine yourself.
Gambling winnings from Maine casinos or lottery tickets purchased in Maine also count. Gains from the sale of a partnership interest are sourced to Maine based on the ratio of the partnership’s Maine tangible property to its tangible property everywhere; if more than half of the partnership’s assets are intangible, a sales-factor test applies instead.
Income from intangibles, like stock dividends, bond interest, or capital gains on securities, is not Maine-source income unless the intangible property is used in a business you operate in the state. Owning a rental cabin in Bar Harbor does not pull your personal investment portfolio into Maine’s tax net.
How the Tax Is Calculated
Maine apportions in three steps. First, you compute a hypothetical Maine tax on your entire federal adjusted gross income as if you were a full-year Maine resident, using the full bracket schedule for your filing status. For 2026:
- Single filers: 5.8% on the first $27,400, 6.75% from $27,400 to $64,850, and 7.15% above $64,850.
- Married filing jointly: 5.8% on the first $54,850, 6.75% from $54,850 to $129,750, and 7.15% above $129,750.
Second, you calculate your apportionment ratio: Maine adjusted gross income divided by total federal adjusted gross income. Earn $30,000 in Maine out of $120,000 total, and the ratio is 0.25. Your standard deduction and personal exemption get multiplied by that same ratio.
Third, the ratio drives a nonresident credit that reduces the hypothetical full-resident tax, stripping out tax on income Maine cannot reach and leaving a liability proportional to your Maine-source earnings. The whole calculation happens on Schedule NR, attached to Form 1040ME.
Situations That Change the Answer
Selling Maine Real Estate
Selling Maine real property triggers a withholding rule that catches many nonresidents off guard. When the sale price is $100,000 or more and the seller is a nonresident, the buyer must withhold 2.5% of the total sale price at closing. This is not a separate tax. It is an estimated payment against whatever income tax you owe on the gain.
If 2.5% of the price substantially overshoots your actual liability on the gain, you can ask Maine Revenue Services for a reduced withholding amount or a full exemption by filing Form REW-5 at least five business days before closing. The agency compares your expected gain against the maximum possible tax (the gain times 7.15%) and may authorize a lower amount. No certificate is issued after the sale closes. You claim credit for the withheld amount on your Form 1040ME just like employer withholding.
Income Through a Partnership, LLC, or S Corporation
If you receive Maine-source income through a pass-through entity, the entity is required to withhold Maine income tax on each nonresident member’s share at the highest individual rate, which for 2026 is 7.15%. Alternatively, the entity can file a composite return that reports and pays tax on behalf of qualifying nonresident members on a single Maine return. If a composite return covers you, you do not need to file your own individual Maine return. You may still choose to file individually if doing so lets you claim deductions or credits unavailable on the composite filing. Credit for the tax paid on your behalf flows through your Schedule K-1.
Military Members and Their Spouses
The Servicemembers Civil Relief Act shields active-duty military pay from being taxed by a state where the servicemember is stationed but not domiciled. Stationed in Maine, domiciled elsewhere, military pay is taxed only by the domicile state. Under the Military Spouses Residency Relief Act, a military spouse’s earned income is also exempt from Maine tax if the spouse is in Maine solely to be with the servicemember and maintains domicile in another state, and the spouse can elect to use the servicemember’s state of residence. Neither the servicemember nor a qualifying spouse files a Maine return on that exempt income.
Deadlines, Extensions, and Estimated Payments
Maine nonresident returns are due April 15 for calendar-year filers, matching the federal deadline. If April 15 falls on a weekend or holiday, the deadline moves to the next business day.
Maine grants an automatic six-month extension to file, with no application required, as long as you actually file within the extended window. If you need more time than that, you have to submit a written request before the six months expire, and the total extension cannot exceed eight months. An extension of time to file is not an extension of time to pay. Send an estimated payment with the extension payment voucher if you expect to owe, to avoid interest and penalties.
Quarterly estimated payments are required if your Maine tax liability will be $1,000 or more for the year after withholding and credits. This catches nonresidents with rental income, self-employment income, or pass-through income where no one is withholding Maine tax on their behalf. Payments are due on the 15th of the 4th, 6th, 9th, and 13th months of your tax year, which on a calendar year means April 15, June 15, September 15, and the following January 15. You can skip estimated payments if your Maine tax liability was under $1,000 in either the current or the prior year.
Forms to File
Every nonresident who files must submit:
- Form 1040ME, Maine’s individual income tax return, used by residents and nonresidents alike.
- Schedule NR, which separates Maine-source income from non-Maine income and calculates the nonresident credit. It must be enclosed with the 1040ME.
- A complete copy of your federal return, including all schedules and attachments.
If you and your spouse filed a joint federal return but have different residency statuses, say one Maine resident and one nonresident, you have two choices. File a joint Maine return as if both spouses were full-year residents, or each spouse files separately as a single individual using Schedule NRH in place of Schedule NR. The same choice is available when both spouses are nonresidents but only one has Maine-source income.
If Your Home State Also Taxes the Same Income
Maine has no reciprocal tax agreement with any neighboring state. You owe Maine tax on Maine-source income even if your home state taxes that same income. Relief runs through your resident state, not Maine. Most states let residents claim a credit for income taxes paid to another state, so you claim the Maine tax as a credit on your home state return. That generally prevents the same dollar from being taxed twice, though you typically end up paying the higher of the two states’ rates on the overlapping income.
Maine’s own credit for taxes paid to other jurisdictions is available only to Maine residents and part-year residents. As a nonresident, you cannot use it. Your relief comes from your home state’s side of the ledger.