Introduction: Expat Tax North Dakota Looks Cheap Until Your UK Income Arrives
The expat tax North Dakota picture is one of the friendliest in America at first glance. Since a 2023 reform, the state charges just 0%, 1.95% and 2.5%, and a single filer pays nothing on the first $49,575 of taxable income in 2026. For a British executive moving to Fargo or Bismarck from London, where the additional rate starts at £125,140, that looks almost like a tax holiday.
However, the low rate hides a structural problem. North Dakota gives no credit for income tax paid to a foreign country. So every pound of UK rent, UK dividends and UK company profit that the IRS taxes and then credits is taxed again by the state, with nothing to offset it. In our experience at TaxYork, the families who come out ahead are those who plan the move around that gap rather than discovering it on their first state return.
Expat Tax North Dakota in One Paragraph
In practice, expat tax North Dakota planning has three layers. First, the state taxes residents on federal taxable income, so whatever the IRS includes, North Dakota includes too. Second, the federal government taxes you on worldwide income from your residency start date, with credits for UK tax. Third, HMRC keeps taxing UK-source income such as rent, and it can reach back to gains made abroad if you return within five years. This guide works through each layer, then shows the numbers for a realistic relocation to Fargo.
Who This Guide Is Written For
We wrote this guide for senior technology, energy, agricultural machinery and finance executives posted to Fargo, Bismarck, Grand Forks and the Bakken. It also covers founders who own UK companies, investors buying North Dakota farmland or property, and dual nationals coming home after years in Britain. Additionally, it addresses Americans in London who still treat North Dakota as their legal home. Moreover, UK-owned subsidiaries already employ around 1,600 North Dakotans, according to the UK Government's North Dakota trade and investment highlights, so British transfers into the state are more common than many people assume. If your household income runs into the high six figures and your balance sheet still sits largely in Britain, this guide is for you.
How North Dakota Taxes Residents in 2026
The headline rates are low, but the mechanics matter more than the rates. Because North Dakota builds on the federal return, every federal decision you make, from the foreign earned income exclusion to a high-tax election on a UK company, flows straight into your expat tax North Dakota bill.
The Three 2026 Brackets Behind Expat Tax North Dakota Bills
For 2026, the North Dakota Office of State Tax Commissioner applies 0% to the first $49,575 of taxable income for a single filer and $82,800 for a married couple filing jointly. Next, 1.95% applies up to $250,400 single or $304,850 joint. Finally, 2.5% applies above those figures. The bands are indexed each year, so the 2025 zero-rate ceilings were slightly lower at $48,475 and $80,975.
Consequently, a couple with $400,000 of taxable income pays roughly $6,700 to the state. That compares with around $30,000 in neighbouring Minnesota, which our guide to British expats in Minneapolis explains in detail.
Federal Taxable Income Is the Starting Point
Form ND-1 starts with federal taxable income, not adjusted gross income. In other words, for expat tax North Dakota purposes, your federal standard or itemised deduction has already come off before North Dakota begins. The state then makes a handful of adjustments, such as subtracting interest on US government bonds. Therefore, the federal return is effectively your state return, and any mistake on it repeats itself at state level.
This design has a useful side effect. Income that a treaty or the Code keeps out of federal taxable income also stays out of North Dakota. For example, the UK State Pension, which the treaty reserves to the UK, never reaches the state at all.
Capital Gains and the 40% Exclusion
North Dakota also lets residents exclude 40% of net long-term capital gains under the state's own law, so only 60% is taxed at the ordinary brackets. As a result, the top effective state rate on a long-term gain is about 1.5%. For an investor selling a London flat or a block of US shares, this is one of the few expat tax North Dakota rules that works in your favour, and that is a strong reason to time disposals for a year when North Dakota is your home rather than a higher-tax state.
However, the exclusion does not change the federal position. Federal long-term rates of 15% or 20%, plus the 3.8% net investment income tax, still apply in full.
Residency: The Domicile and 210-Day Rules
Before any expat tax North Dakota calculation, you need to know whether the state treats you as resident at all. The test has two limbs, and British arrivals often meet the second before they meet the first.
Domicile Comes First
You are a North Dakota resident if the state is your domicile, meaning the place you treat as your permanent home and intend to return to. A Briton who buys a house in Fargo, moves the family and takes a permanent role is domiciled there from arrival. Similarly, a dual national who grew up in Bismarck and keeps a home there may never have lost a North Dakota domicile despite years in London.
The 210-Day Test in Expat Tax North Dakota Cases
Separately, North Dakota treats you as a full-year resident if you keep a permanent place of abode in the state and spend more than seven months there, commonly counted as 210 days. A permanent place of abode is a dwelling with kitchen and bathroom facilities, suitable for year-round living. Therefore, a British executive on a three-year secondment who rents a flat and stays most of the year is taxed as resident, even while their domicile stays in England.
Notably, the 210-day rule does not apply to a part-year resident who genuinely moved in or out and changed domicile during the year. That carve-out is what makes the arrival year the most valuable year in expat tax North Dakota planning.
Part-Year Residents and the Arrival Year
In the year you arrive, North Dakota taxes you as a part-year resident. In broad terms, the state computes tax on your full federal taxable income and then multiplies it by the share of that income earned or received while you were resident. Consequently, a UK bonus paid in March before a June move, or a pre-arrival sale of shares, sits outside the state calculation. Moreover, if you were not yet a US tax resident when you received it, the same income sits outside the federal calculation too.
The Missing Credit for UK Tax
This is the single most important point in expat tax North Dakota planning, and no general expat guide we have read covers it. The state's credit for tax paid elsewhere stops at the US border.
What Schedule ND-1CR Allows
North Dakota residents can claim a credit on Schedule ND-1CR for income tax paid to another state or a local jurisdiction on the same income. However, the Schedule ND-1CR instructions state plainly that the credit is not allowed for income tax paid to a foreign country or its local jurisdictions. Furthermore, the credit is only allowed once you have filed a return with the other state, not on withholding alone.
Why the Federal Credit Does Not Fix Expat Tax North Dakota Exposure
At federal level, the foreign tax credit removes most double taxation on UK income, because UK rates usually exceed US rates. Yet the federal credit reduces federal tax only. It does not reduce federal taxable income, so the UK rent or dividend stays in the figure North Dakota starts from. As a result, the state taxes that income at up to 2.5% while the UK has already taxed it at 20% to 45%.
On a small portfolio, this expat tax North Dakota leak is a rounding error. On £400,000 of annual UK rent and dividends, however, it is roughly $12,000 a year of tax with no relief anywhere.
Choosing Between the FEIE and the Credit
The interaction becomes sharper for Americans in London who keep a North Dakota domicile. If they claim the foreign earned income exclusion, up to $132,900 of earnings for 2026 drops out of federal taxable income and therefore out of North Dakota. By contrast, if they rely on the foreign tax credit instead, the whole salary stays in federal taxable income, and North Dakota taxes it in full.
Therefore, for a domiciled North Dakotan in London, the choice between the exclusion and the credit is a state decision as well as a federal one. We model both before every first-year return, because revoking the exclusion later locks you out of it for five years.
Federal Tax on Your UK Income After the Move
Once you become a US tax resident, the IRS taxes your worldwide income. This federal layer drives the expat tax North Dakota result, because whatever lands in federal taxable income lands on the state return too.
Your Residency Start Date
A green card holder becomes resident from the first day in the US with the card. A visa holder usually becomes resident under the substantial presence test, with residency normally starting on the first day of presence in the qualifying year. Consequently, the arrival year is usually a dual-status year, and income received before that date is generally outside US tax unless it is US-source. See the IRS guide to US citizens and resident aliens abroad for the wider rules.
This date is the most valuable lever in expat tax North Dakota planning. Gains realised, bonuses paid and funds sold before it are usually free of US tax, and therefore free of North Dakota tax too.
UK Workplace Pensions Under Article 17
Under the US-UK tax treaty, growth inside a UK registered pension is not taxed in the US while it stays invested. When you draw it as a US resident, Article 17 generally gives the taxing right to the US, and HMRC will pay gross once it accepts your treaty claim. Additionally, as MoneyHelper's pension guidance explains for UK savers, the 25% tax-free lump sum is a core feature of UK pensions, and the portion that the UK would exempt is generally exempt in the US too, under Article 17(1)(b).
Importantly, for expat tax North Dakota purposes the state follows the federal result. A taxable pension drawing is taxed by the state at up to 2.5%, and the tax-free lump sum that the treaty protects federally stays out of the state calculation as well.
The UK State Pension
Article 17(3) reserves UK social security benefits to the UK. As a result, the UK State Pension is taxable only in Britain, even for US citizens, and it does not appear in federal taxable income. North Dakota never sees it. Separately, the state fully exempts US Social Security benefits, which helps dual nationals with a US work record.
ISAs and UK Funds: The PFIC Problem
Unfortunately, the US does not recognise the ISA wrapper. Income and gains inside a stocks and shares ISA are taxable in the US, and UK collective funds held inside or outside it are usually passive foreign investment companies, a status that dominates expat tax North Dakota work for British investors. Each fund may need Form 8621 every year.
Under the default excess-distribution regime, part of the cost is a separate federal tax and interest charge that never enters taxable income, so North Dakota does not reach it. However, if you elect mark-to-market, each year's gain is ordinary income in federal taxable income, and the state taxes it too. Consequently, the cleanest answer for most arrivals is to sell UK funds inside the ISA before your residency start date, when the sale is free of both UK and US tax.
UK Company Owners Moving to Fargo
Founders form a growing part of our North Dakota client base, and their expat tax North Dakota exposure differs sharply from an employee's. The issue is how the state treats income from a UK company you control.
The CFC Rules and Form 5471
If you own more than 50% of a UK company once you are a US person, it becomes a controlled foreign corporation. You must then file Form 5471 each year, with a $10,000 penalty per form for late or missing filings. Moreover, you may face an annual inclusion of the company's net CFC-tested income, formerly known as GILTI, even when the company pays you nothing.
How North Dakota Treats the Inclusion
North Dakota's guidance on international tax provisions treats these inclusions as a foreign dividend inside federal taxable income. For an individual, there is no state credit for the UK corporation tax the company has already paid. Therefore, without planning, expat tax North Dakota rules let the state tax profits that HMRC has taxed at 25% and that you have not yet received.
The High-Tax Exception as a State Planning Tool
Fortunately, the federal high-tax exception offers a clean answer. Where the UK effective rate exceeds 90% of the US corporate rate, currently 18.9%, an election removes that income from the inclusion. A UK trading company paying 25% corporation tax usually qualifies. Consequently, the election cuts the federal inclusion to nil, and North Dakota has nothing to tax. We treat it as a default expat tax North Dakota review point for any founder taking up residence in the state.
The UK Side: What HMRC Still Expects
Leaving Britain does not end your relationship with HMRC. Instead, it changes which income HMRC can reach, and the expat tax North Dakota plan must fit around those UK rules.
Split-Year Treatment and the Statutory Residence Test
Under the statutory residence test, you can usually claim split-year treatment in the year you leave for full-time work or to join a partner abroad. As a result, foreign income after departure falls outside UK tax. However, the cases have strict conditions on UK days and UK workdays, so we check them against your diary before you book flights. Getting the UK departure right is the foundation of sound expat tax North Dakota planning.
Your London Flat as a Non-Resident Let
If you keep a London flat and let it, HMRC taxes the rent under the non-resident landlord scheme. Your letting agent withholds basic rate tax unless HMRC approves gross payment, and you file a UK return each year. The IRS taxes the same rent, with a credit for UK tax. Meanwhile, North Dakota taxes it too, with no credit, which is exactly the expat tax North Dakota gap described above.
Furthermore, a later sale of that flat falls within UK capital gains tax for non-residents, with a 60-day reporting deadline. On the US side, the gain is measured in dollars, so currency movements since purchase can create a US gain even where the sterling gain is small.
Temporary Non-Residence
If you return to the UK within five full tax years, HMRC's temporary non-residence rules can tax certain gains and income received while you were away. For instance, selling a large shareholding in a UK company in your second year in Fargo and returning in year four can bring that gain back into UK tax. Therefore, an expat tax North Dakota plan that relies on a low state rate must also survive a possible early return.
Property, Sales and Local Taxes
Income tax is only part of the cost of living in the state. For high-net-worth arrivals, property tax and sales tax shape the real expat tax North Dakota budget, particularly for those buying large homes or farmland.
Property Tax and the $1,600 Residence Credit
North Dakota has no state-level property tax on homes. Instead, cities, counties and school districts levy it locally. In 2025, the legislature passed HB 1176, which raised the primary residence credit to a maximum of $1,600 a year and capped most local levy increases at 3% a year. Notably, in expat tax North Dakota budgets the credit applies to your main home only, so a lake cabin or investment property gets no relief.
Sales Tax in Fargo and Bismarck
The state sales tax rate is 5%, and cities and counties add their own local rates. Consequently, the combined rate in the larger cities typically runs around 7.5% to 8%. For a family furnishing a new home and buying vehicles, that is a noticeable one-off cost, although it is far lower than the 20% VAT you leave behind.
Wage Reciprocity With Minnesota and Montana
North Dakota has income tax reciprocity with Minnesota and Montana for wages. Thus, a Briton who lives in Moorhead, Minnesota and works in Fargo pays income tax on wages only to Minnesota, and vice versa. Because Minnesota's top rate is 9.85%, in expat tax North Dakota terms the choice of which side of the Red River to live on is worth far more than the choice of school district. Our guides to British expats in Montana and British expats in Omaha, Nebraska cover the neighbouring states.
Reporting Your UK Accounts: FBAR and Form 8938
The heaviest penalties in expat tax North Dakota cases come from information returns, not from tax. Most British arrivals keep UK bank, ISA, pension and brokerage accounts for years after the move.
The FBAR
Once you are a US person, you must file an FBAR on FinCEN Form 114 if the combined value of your foreign accounts exceeds $10,000 at any time in the year. The deadline is 15 April with an automatic extension to 15 October. Moreover, the IRS guidance on FBAR reporting confirms that UK pensions and ISAs count. A missed FBAR can cost more than $16,000 per non-wilful report after inflation adjustments, and far more where the IRS asserts wilfulness.
Form 8938 and the First-Year Trap
Separately, Form 8938 under FATCA applies to US residents with foreign financial assets above $50,000 at year end or $75,000 at any time, doubled for joint filers. The first-year expat tax North Dakota trap is that many arrivals assume a dual-status return excuses them. It does not, for the resident part of the year. If you have already missed these forms, our FBAR and FATCA compliance service can bring you up to date before the IRS asks.
Americans in Britain Who Still Call North Dakota Home
The reverse case matters too. Many North Dakotans work in London's finance and energy sectors, and their expat tax North Dakota position depends on whether they ever broke their domicile.
How a Domicile Survives a Move to London
Domicile does not end just because you leave. It ends when you set up a new permanent home elsewhere and no longer intend to return. Keeping a North Dakota driver's licence, voter registration, a family home or a farm interest can all support the view that North Dakota remains your domicile. Unlike New York or California, North Dakota offers no statutory safe harbour that lets a domiciliary escape residency simply by working abroad.
When It Costs You Money
For a London employee claiming the exclusion, the state cost is usually small, because excluded wages never reach North Dakota. However, the cost grows once income exceeds the exclusion, once you switch to the foreign tax credit, or once you receive large UK bonuses, carried interest or company profits. In those cases, the state taxes at up to 2.5% with no credit for the UK's 45%. Therefore, as part of every expat tax North Dakota review, we check domicile evidence with each London-based North Dakotan before their income climbs.
Expat Tax North Dakota Case Study: A Software Executive's Move to Fargo
The following illustrative case study draws on the planning patterns we see in practice. Names and details are changed, but the figures reflect 2026 rules.
The Family and the Move
James and Priya, both British citizens, moved from Surrey to Fargo in June 2026 when James took a senior engineering role at a software campus there. Their US household salary is $380,000 a year. They kept a London flat that produces £30,000 of net rent, worth about $30,000 for US purposes after US depreciation. They also held £200,000 in stocks and shares ISAs, mostly in UK funds, plus a UK workplace pension that James will not draw for years.
The Expat Tax North Dakota Decisions We Made
First, we arranged for James's UK bonus of £60,000 to be paid in May, before his US residency start date. As a result, it fell outside both the federal and North Dakota calculations. Second, we sold the UK funds inside the ISAs in May and moved the cash into a US brokerage account, avoiding years of Form 8621 filings. Third, we confirmed split-year treatment in the UK and registered the flat under the non-resident landlord scheme.
Finally, we filed a dual-status 2026 return for the arrival year and prepared the FBAR and Form 8938 for the resident period. We also checked whether living in Moorhead would have saved money. It would not, because Minnesota would have taxed their wages at up to 9.85%.
The Numbers for a Full Year
For 2027, their first full year, federal taxable income is about $387,800 after the $32,200 joint standard deduction, including the $30,000 of net London rent and $10,000 of US investment income. North Dakota's tax is 1.95% on $222,050 between $82,800 and $304,850, or $4,330, plus 2.5% on the $82,950 above it, or $2,074. In total, the state bill is about $6,404.
Meanwhile, the UK taxes the rent at about £972 after each spouse's personal allowance, and the IRS credits that against the federal tax on the rent. However, North Dakota taxes the same $30,000 at 2.5%, costing $750 with no credit. That is the visible expat tax North Dakota price of the missing foreign credit for this family, and it is modest only because we cleared the ISA funds and the bonus before arrival.
What It Would Have Cost Without Planning
Had the bonus been paid in July, the IRS would have taxed it as a resident's income. Because HMRC taxes UK employment income at up to 45%, the federal foreign tax credit would have absorbed most of that federal charge. However, North Dakota would have added roughly $1,900 with no credit at all, and the dual-status return would have become far more complex. Likewise, keeping the UK funds would have meant five Form 8621 filings a year, excess-distribution charges on any later sale and, under a mark-to-market election, state tax on paper gains. In our experience, the compliance cost alone of five PFIC funds runs to several thousand dollars a year, before any tax.
Our Six-Question Test Before You Move
Before any client relocates, we ask six questions. First, on what date will your US tax residency start, and what can you realise before it? Second, will the 210-day rule or your domicile make you a North Dakota resident? Third, how much UK income will stay in federal taxable income with no state credit? Fourth, do you own more than 50% of a UK company, and does the high-tax exception apply? Fifth, which UK funds and ISAs should you sell before arrival? Finally, will living across the river in Minnesota cost you more than it saves?
Answering those expat tax North Dakota questions in writing, months before the move, is the single most effective way to control your expat tax North Dakota outcome.
How TaxYork Can Help
We provide comprehensive US and UK tax preparation for wealthy British families and Americans moving between the two countries, with North Dakota returns prepared alongside the federal and UK filings so the three never contradict each other.
Expat Tax North Dakota Returns for Senior Executives
For expat tax North Dakota clients, our team prepares dual-status federal returns, Form ND-1 and Schedule ND-1NR for arrival years, UK self-assessment returns and the FBAR and Form 8938 in one coordinated workflow. We also handle US tax return preparation for expats for Americans in London who keep a North Dakota domicile, including the exclusion versus credit analysis.
Founders, Investors and Dual Nationals
For founders, we prepare Form 5471, model the high-tax exception and coordinate UK corporation tax with your US filings through our tax treaty optimisation service. For investors buying farmland, property or businesses in the state, our cross-border planning team structures the purchase before you sign. If you have missed US tax returns, missed FBARs or missed reporting of UK pensions and ISAs, we prepare the catch-up filings as well.
Conclusion
North Dakota's 2.5% top rate makes it one of the cheapest states in America for a high earner. Yet the state's refusal to credit UK tax, its 210-day residency rule and its reliance on federal taxable income all mean that British income can cost more than the headline suggests. The good news is that most expat tax North Dakota cost is avoidable. Careful timing of bonuses and fund sales, the high-tax exception for UK companies and a clear residency plan usually keep the bill close to the minimum.
Ultimately, successful expat tax North Dakota planning happens before the removal van arrives in Fargo, not after the first state return is filed.
Contact Us
If you are moving to Fargo, Bismarck or Grand Forks, or you are an American in London who still calls North Dakota home, we can prepare your federal, state and UK returns together. For expat tax North Dakota returns prepared by specialists, please book a consultation with our team, email hello@taxyork.com or call 020 3488 8606. We will map your arrival-year position and give you a clear, written plan.
Disclaimer
This article provides general information on US federal, North Dakota and UK tax rules as at October 2026 and does not constitute tax, legal or financial advice. Tax law changes frequently, and your position depends on your individual circumstances. You should take professional advice before acting on any information in this article. For official guidance, see HMRC's guidance on tax on foreign income and residence, the IRS guidance for US citizens and resident aliens abroad, HMRC's US tax treaty publications and the IRS introduction to residency under US tax law. Information on ISA rules and the HMRC residence manual is also available on GOV.UK.