Introduction: Expat Tax Maine Changed in April 2026
The expat tax Maine picture changed in April 2026, when the state added a 2% surcharge on high incomes and backdated it to 1 January. Consequently, the top rate on a Maine resident's worldwide income is now 9.15%, not the 7.15% that most online guides still quote. Maine also gives you no credit for income tax paid to the UK. So a one-off British share sale can land in that top slice with nothing to offset it.
Most of what you can read on the subject was written before this change, and little of it mentions Britain at all. In our experience at TaxYork, the expensive errors here are errors of sequence. For example, people sell first and establish residence later, or they assume the federal credit carries down to the state return. This expat tax Maine guide therefore sets out what Maine actually taxes, where a UK pension falls outside the state deduction, and what to do before you move.
Expat Tax Maine in One Paragraph
In short, expat tax Maine means three separate tax systems. Maine taxes residents on everything in federal adjusted gross income, at 5.8% to 7.15% plus the surcharge. Next, the IRS taxes you on worldwide income from the day you become a US resident, and it does give relief for UK tax. Finally, HMRC keeps taxing UK-source income such as rent. Only the federal layer talks to the other two. As a result, Maine tax on your UK income is usually a true extra cost.
Portland, Maine, Not Portland, Oregon
A quick point on geography saves confusion. This guide covers Portland, Cape Elizabeth, Falmouth, Kennebunkport, Camden and Mount Desert Island. If you are heading to the Pacific Northwest instead, our guide to Oregon's 9.9% rate and Portland's local income taxes applies. For expat tax Maine purposes, there is no city income tax of that kind, so the state return is the whole of the subnational income tax problem. Your neighbours differ sharply, too. For instance, New Hampshire charges no tax on wages, which matters if you are still choosing where to buy on the New England coast.
What Maine Taxes: Rates, the Surcharge and Your Base
Maine's rate structure looks simple, but the surcharge and the deduction phase-outs change the result at high incomes. Additionally, the base starts from your federal figure, so whatever the IRS counts generally reaches the state as well. Your expat tax Maine calculation therefore begins with a completed federal return.
The 2026 Brackets
Under the Maine 2026 rate schedule, joint filers pay 5.8% on taxable income below $54,850 and 6.75% up to $129,750. Above that, they pay 7.15%. Single filers reach the top rate at $64,850, and heads of household at $97,300. In practice, almost every expat tax Maine reader sits in the top bracket for most of their income. Furthermore, Maine has no reduced rate for long-term capital gains or qualified dividends. A gain taxed federally at 20% is therefore taxed in Maine as if it were salary.
The 2% Surcharge From 2026
The surcharge sits in 36 M.R.S. section 5111 and applies for tax years beginning on or after 1 January 2026. It adds 2% on Maine taxable income above $1,000,000 for single filers and $1,500,000 for joint filers and heads of household. Married people filing separately hit it at half the joint figure, which is $750,000. Notably, the base is taxable income of every kind, so one large gain can trigger it in a single year. Withholding tables only caught up in August 2026. Therefore, if your expat tax Maine plan relies on estimated payments, check that your 2026 payments allow for it.
Deductions That Vanish at Your Income Level
Maine's 2026 basic standard deduction is $31,400 for joint filers, under section 5124-C. However, that deduction phases out as income rises. On the 2025 worksheet, the phase-out began at $200,050 of joint income and finished $150,000 later. Itemised deductions follow the same fraction, and the 2025 cap on them was $36,300, excluding medical costs. The $5,300 personal exemption also phases out at higher incomes. For a household earning over about $600,000, taxable income and adjusted gross income are close to the same number. In other words, any expat tax Maine projection should apply the headline rate to almost every dollar.
No Credit for UK Tax: The Core Expat Tax Maine Problem
This is the rule that shapes every expat tax Maine plan. Maine does have a credit for tax paid elsewhere, but the UK falls outside it. Moreover, the federal credit you claim on Form 1116 does nothing to reduce the Maine bill.
What Section 5217-A Actually Says
The credit in 36 M.R.S. section 5217-A covers tax imposed by another US state, a political subdivision of a state, the District of Columbia, or a "political subdivision of a foreign country that is analogous to a state". Maine Revenue Services gives New Brunswick as its example, which makes sense on a border with Canada. In contrast, its income tax credit guidance treats a foreign country itself as ineligible. UK income tax is a national tax, so it does not qualify. Vermont reaches a similar answer to this expat tax Maine rule, as our Burlington guide explains.
Why Scottish Income Tax Does Not Rescue You
A sharp reader will ask whether Scotland is analogous to a state. We have seen no Maine ruling on the point, but it rarely matters. Specifically, Scottish income tax applies to people who live in Scotland and are UK resident. Once you are resident in Maine, your Edinburgh flat's rent is taxed at UK rates as a non-resident landlord, not at Scottish rates. Hence the argument adds almost nothing to your expat tax Maine position.
The Treaty Does Not Bind Maine, and Deductions Do Not Help
The US-UK income tax treaty relieves double taxation between the IRS and HMRC. However, its covered US taxes are federal, so it creates no Maine credit. You also cannot fall back on deducting the UK tax. Section 5125 strips out income taxes imposed by "any other taxing jurisdiction" from Maine itemised deductions. Consequently, in expat tax Maine terms, UK tax paid gets no relief on the state return at all.
What This Costs on Each UK Income Type
The arithmetic is easy to state. Rent from a London flat costs up to 7.15% extra in Maine, or 9.15% in a surcharge year, on top of whichever is higher of the UK and federal charges. The same applies to UK dividends, UK interest, and UK bonus income earned after you arrive. Accordingly, the useful question for your expat tax Maine review is not "how do I get a credit?". Rather, it is "which income can I move out of my Maine years, and which can I reduce?".
UK Pensions and the Maine Pension Deduction
Here is a trap that the published guides miss. Maine advertises a generous pension income deduction, of up to $48,216 per person for 2025. Many British retirees assume their UK pension qualifies. On the statutory wording, it probably does not, and that belongs in any honest expat tax Maine review.
The Definition Is Written Around the US Code
Under section 5122(2)(M-2), the deduction covers state, federal and military plans, and employer plans established "under the Code", meaning sections 401(a), 403 and 457(b). It also covers IRAs and similar US arrangements under section 408. A British occupational scheme or SIPP is established under UK law, not under those sections. Therefore, our expat tax Maine reading is that UK pension income falls outside the deduction. We have not found a Maine ruling either way, so you should treat a claim as a position to take with care rather than a routine entry.
Phase-Out and the Age 55 Rule
Two more limits apply from 2025. The Form 1040ME instructions explain that the deduction phases out above federal adjusted gross income of $125,000 for single filers and $250,000 for joint filers. Those thresholds are indexed after 2025. Additionally, distributions from an employee plan before age 55 generally do not qualify unless they form part of a series of substantially equal payments. As a result, for expat tax Maine purposes the deduction mostly helps in lower-income retirement years, and those are exactly the years when you might expect a UK pension to benefit.
The UK State Pension and the Tax-Free Lump Sum
Maine subtracts Social Security benefits "paid by the United States", under the same section. A UK State Pension is not paid by the United States. So, to the extent it appears in your federal adjusted gross income, the wording gives no matching subtraction. Likewise, the 25% pension commencement lump sum can catch you out. HMRC treats it as tax free, yet the treaty technical explanation and saving clause leave many US residents exposed federally. Once it is in federal income, it flows into Maine and gets no state relief. Take advice before you draw it from a Maine address.
Government Pensions Under Article 19
NHS, Teachers' and Local Government pensions follow different treaty rules. Broadly, a UK government pension is taxable only in the UK, unless the recipient is both a US national and a US resident. If a non-citizen properly excludes it from federal income, it should not enter Maine's starting figure. We found no Maine add-back for it, but please confirm this on your own facts. Note also the US citizen and green card variations, which we cover in our US tax return preparation for expats work.
Residence: When Maine Can Tax You and When It Stops
Residence is where you have the most control. Maine taxes residents on worldwide income but non-residents only on Maine-source income. So your expat tax Maine position depends heavily on dates. The governing definition is 36 M.R.S. section 5102(5).
Two Routes to Being a Resident
The first route is domicile. If Maine is your domicile, you are a resident unless a safe harbor applies. Domicile continues until you establish a new one, and the person asserting the change carries the burden of proof. The second route is statutory. You are resident if you maintain a permanent place of abode in Maine and spend more than 183 days there in the year, even when your domicile lies elsewhere. The classic expat tax Maine surprise follows: a Briton who keeps a summer house in Camden and stays until November can become fully taxable on worldwide income without ever intending to live there.
The Summer House Test for Wealthy Britons
Many of our clients first arrive through a holiday home. A place used only for a short stay with a particular purpose can fall outside the definition of a permanent place of abode, under the state's Rule 807. The rule was amended again with effect from 7 October 2026, so check the current text. Meanwhile, a house you keep available all year looks permanent. Our practical expat tax Maine rule is to keep a day log and stay well under 183 days. Remember too that the IRS has its own substantial presence test, which counts days differently and covers the whole country.
The Two Safe Harbors for Leaving Maine
The reverse expat tax Maine case is the American leaving for London. Maine-domiciled people who go abroad have two exits. The general safe harbor requires no permanent place of abode in Maine, one elsewhere, and no more than 30 days in Maine in the year. Any part of a day counts. The foreign safe harbor requires at least 450 days in foreign countries within 548 consecutive days, no more than 90 days in Maine, and no Maine home where a spouse or minor child stays more than 90 days. A pro-rated day limit also applies to the part-years at each end. Importantly, you cannot confirm the foreign test until the 548 days have ended.
Part-Year Returns
In your move year, you file Form 1040ME with Schedule NR, and Maine taxes your worldwide income only for the resident portion. Therefore, the exact date you became a Maine resident matters enormously when a large gain falls in the same year. For a strong expat tax Maine file, we recommend assembling evidence of that date, such as the lease, school enrolment and driving licence, before filing rather than after a query.
Case Study: A UK Share Sale From Cape Elizabeth
Eleanor and Tom are an illustrative British couple with green cards who moved to Cape Elizabeth in 2025. Tom earns $420,000 from a Maine business. Eleanor draws a UK private occupational pension of £60,000, or $81,000 at an assumed $1.35 rate. They also net £50,000, or $67,500, from a London flat. In 2026, Eleanor sells a stake in a UK private company at a federal gain of $1,300,000.
The 2026 Maine Bill
Their federal adjusted gross income is $1,868,500. At that level, we assume their deductions and exemptions have fully phased out. The rate schedule produces $8,237 plus 7.15% of the excess over $129,750, which is $132,558. The surcharge adds 2% on $368,500, or $7,370. Their expat tax Maine bill is therefore $139,928. No part of it is reduced by UK tax. Without the sale, they would owe about $39,608, so the sale alone costs $100,320 in Maine tax.
What the UK Income Costs
Now take the rent and the pension. Eleanor keeps her personal allowance as a British citizen, so the flat bears UK tax of about £7,486, or $10,106. That gives a federal credit, subject to the Form 1116 limits, but no Maine relief. The pension is generally taxed only by the country of residence under Article 17, so HMRC should not charge it once the paperwork is in place. Even so, these two sources sit in the 9.15% slice in the sale year and together bear $13,588 of Maine tax. Furthermore, the 3.8% net investment income tax applies to the rent and gain federally, and UK tax does not generally credit against it.
Three Alternatives We Would Test
The first expat tax Maine alternative is structural: the sale could be structured with real deferred payment across two tax years. At $650,000 a year, taxable income falls to $1,218,500 in each year, and the $7,370 surcharge disappears. The federal instalment rules need checking for this, and so does the commercial credit risk. Second, a sale before US and Maine residence would remove $100,320 of Maine tax and about $309,400 of federal tax at 23.8%. However, a sale while UK resident would attract 24% UK capital gains tax, or about $312,000. The real saving lies only in a genuine gap between UK and US residence. Third, the temporary non-residence rules can bring the gain back into UK tax if she returns within five years. So the timing must work for both countries, and the 2025 move had already closed the best window for this couple.
A Pre-Move Sequence for Expat Tax Maine
Timing wins more money here than any technical election. Because no credit exists, the planning goal is simple: shrink the UK-source and capital income that falls in Maine resident years. The following expat tax Maine sequence is the one we use, in order.
Before You Exchange on a Maine Property
Begin by listing every asset with a large unrealised gain, and work out the basis in dollars at the historic exchange rates. Next, fix your intended US residence start date and your Maine date, since they may differ. Then decide what to sell, and when, in light of the UK position. A leaver may qualify for split-year treatment, but the conditions are strict. Also budget for the transfer tax. Under section 4641-A, buyer and seller each pay half of $2.20 per $500 up to $1,000,000 and $6.00 per $500 above that. A $1,800,000 home therefore costs $14,000 in total, or $7,000 for each side.
Your First Year in Maine
Once you arrive, register your UK flat under the non-resident landlord scheme if you have not already done so. Then review your ISAs and UK funds, because the US may treat them as passive foreign investment companies reportable on Form 8621. In addition, set up Maine estimated payments. Maine penalty rules changed from September 2025, so the fourth instalment escapes the underpayment penalty if you pay the full tax by the end of January. Finally, tell your UK pension provider about your new residence before it next pays you.
Your Annual Expat Tax Maine Review
Each October, run a projection of Maine taxable income against the surcharge threshold. If you are close to $1,500,000, you may be able to defer a bonus, delay a discretionary sale, or bring forward deductible business costs. Separately, if you are married and only one spouse holds the gains, compare the joint and separate positions. Separate filing halves the surcharge threshold, so it rarely helps, yet federal and state results can differ. Review your expat tax Maine day log at the same time if you still travel to Britain for long periods.
Federal and UK Filings That Still Apply
The expat tax Maine return is one filing among many. The federal and UK items below carry heavier penalties than the state return does, and they are where we most often find gaps.
FBAR, Form 8938 and Missed Reporting
If your UK accounts total more than $10,000 at any time in the year, you must file an FBAR with FinCEN. Living in the US also means lower Form 8938 thresholds: joint filers report above $100,000 at year end or $150,000 at any time. A missed FBAR or an unreported pension or ISA is common among recent arrivals. Our FBAR and FATCA team can review what should have been reported and what the correct route back is.
Missed US, UK and Maine Returns
Dual national US UK clients often have gaps on more than one side. For example, an American returning from London may have missed US tax returns, while a Briton may have missed a UK return on the flat. When federal returns are later corrected, your expat tax Maine figure usually needs to be revisited too, since the state base follows federal income. Therefore, we prepare all sides together rather than fixing them one at a time. You can see how this fits into wider arrivals planning in our complete guide to UK expat tax in the USA.
Treaty Positions and Form 8833
Where you rely on a treaty position, such as the tie-breaker in Article 4, disclosure on Form 8833 may be required federally. Do not assume Maine will mirror a position that goes beyond federal income, however. Keep the state analysis separate, as we explain in our tax treaty optimisation service. A strong expat tax Maine file records the reasoning for each treaty position and its state effect.
How TaxYork Can Help
TaxYork provides comprehensive US and UK tax return preparation and compliance for high-net-worth individuals, investors, company owners and senior executives. For expat tax Maine clients, we prepare your federal return, Form 1040ME, and your UK Self Assessment as one coordinated set of figures. That includes residence dating, surcharge projections, Form 1116, FBAR and Form 8938. We also model a planned sale before you commit to its timing, so you see the Maine, federal and UK cost side by side. As a result, you receive one consistent position rather than three returns that disagree.
Conclusion
Maine is an attractive place to live, but it is not a cheap place to hold British wealth. The expat tax Maine rules combine a 9.15% top rate, no credit for UK tax, no Maine deduction for that tax and a pension deduction written around US plans. In practice, the outcome depends on what you do before your residence date, and on whether your day count and your paperwork can prove that date. Start planning before you exchange contracts, and review the position each October after that.
Contact Us
If you are moving to Maine, already living there, or planning a large sale from Portland or the coast, please book a consultation with our team. You can also email hello@taxyork.com or call 020 3488 8606. We will review your dates, your UK income and your filing history, and then set out a clear plan.
Disclaimer
This article provides general information about US federal, Maine and UK tax rules as they stood in October 2026. It is not tax or legal advice, and it does not create a client relationship. Some 2026 Maine thresholds were not published when we wrote this, so we have used 2025 phase-out figures where stated. The readings of Maine law on UK pensions and treaty positions reflect our interpretation of the statute, and no Maine ruling confirms them. The case study is illustrative, uses rounded figures and an assumed exchange rate, and does not describe any individual client. Please obtain professional advice before acting on any of the matters discussed.