Introduction: Expat Tax Portland Means Three Income Taxes, Not One
The expat tax Portland position is the heaviest in this series, and the reason is local. Oregon charges up to 9.9%. Multnomah County adds up to 3% more. Metro adds another 1%. Together that is a top marginal rate near 13.9%, and none of the three gives credit for tax you have paid to HMRC.
At TaxYork, we prepare returns for British engineers, athletic-brand executives, semiconductor specialists, founders and retirees across Portland, Lake Oswego and the Willamette Valley. In our experience, arrivals budget for Oregon and discover the county and Metro taxes only when a bill arrives. Consequently, the expat tax Portland bill routinely lands thousands of dollars above what a new arrival expects.
Expat Tax Portland Basics: Four Systems, One Household
A British household in Portland deals with four systems. First, federal income tax reaches worldwide income, softened by the foreign tax credit on IRS Form 1116. Second, Oregon taxes the same income on graduated rates. Third, the local district taxes apply on top. Fourth, the United Kingdom keeps taxing UK property, UK workdays and some pensions. Therefore sound expat tax Portland compliance runs all four together.
Who This Guide Is Written For
This guide addresses high-net-worth British nationals, dual national US UK families and accidental Americans in the Portland metro area. Specifically, it suits company owners, investment professionals, senior executives and retirees who keep UK property, pensions and portfolios. If your household income passes $200,000, every expat tax Portland rule below has a price. For the national picture, read our complete guide to UK expat tax in the USA.
How Portland Compares With the Other Cities We Cover
The contrast with our other city guides is stark. Arizona credits UK tax outright on Form 309. Georgia charges 4.99% and shelters pensions generously. Philadelphia stacks a city tax on a low state rate. Portland combines a high state rate with two local taxes and almost no foreign relief. Accordingly, the expat tax Portland outcome is the least forgiving we have modelled.
The Three Layers of Portland Income Tax
Each layer has its own thresholds, and each reaches UK income. Together they define the expat tax Portland burden.
Oregon at Up to 9.9%
Oregon applies graduated rates rising to 9.9%. That top rate begins at a modest income by British standards, so most expat tax Portland clients reach it. Oregon levies no sales tax, which offsets part of the burden. However, for a household with significant UK income, the income tax rate is what matters. The Oregon Department of Revenue publishes the current brackets each year.
Multnomah County Preschool for All
If you live in Multnomah County, which includes most of Portland, the Preschool for All tax applies. It charges 1.5% on income above $125,000 for single filers and $200,000 for joint filers. A further 1.5% applies above $250,000 and $400,000, giving 3% at the top. Notably, the county has again delayed a planned increase, so expat tax Portland rates hold for now. The Multnomah County Preschool for All guidance sets out the details.
The Metro Supportive Housing Services Tax
Metro, the regional government, adds a 1% tax above its own thresholds. Importantly, those thresholds are indexed for the first time from 1 January 2026. They now stand at roughly $128,000 for single filers and $205,000 for joint filers, up from $125,000 and $200,000. The Metro Supportive Housing Services guidance explains the mechanics. Consequently, indexation slightly reduces the expat tax Portland burden each year.
Adding the Layers Together
For a couple above $400,000, the marginal stack reaches about 13.9%. That figure applies to UK rental profit and UK dividends just as it applies to an Oregon salary. Furthermore, Portland residents also pay the flat $35 Arts Tax. The City of Portland personal tax page collects the local filing requirements in one place.
Which County You Live In Decides the Bill
Portland is not one tax jurisdiction. The city spans Multnomah, Washington and Clackamas counties, and the Preschool for All tax applies only to Multnomah County residents. Consequently, two British families on the same salary can face marginal rates 3% apart. They may live only four miles apart inside the same city. Addresses in parts of southwest Portland fall outside Multnomah County. Metro's tax, by contrast, covers the wider regional district. Moving between those counties therefore does not escape it. Checking the county before signing a lease is the cheapest expat tax Portland planning there is.
The Credit Oregon Will Not Give You
This section explains why UK tax does almost nothing in an expat tax Portland computation.
"State" Means the United States Only
Oregon grants residents a credit for income tax paid to another state. However, the administrative rules define "state" as a state, district, territory or possession of the United States. Foreign countries are outside that definition. Therefore UK tax paid to HMRC earns no Oregon credit, and the position matches Georgia and Pennsylvania rather than Arizona.
The Local Taxes Follow Oregon
Multnomah County and Metro build their taxable income from the Oregon figure. Consequently, a relief Oregon refuses is a relief the local districts refuse as well. There is no separate county or Metro credit for foreign tax. That cascade is what makes the expat tax Portland arithmetic so unforgiving.
Why Form 1116 Stops at the Federal Return
The federal foreign tax credit operates inside the Internal Revenue Code only. Oregon computes its own liability and applies its own credits. Consequently, excess credits and carryovers reduce nothing at state or local level. Our treaty and double tax relief service addresses the federal side, yet three Oregon layers remain untouched.
ORS 316.690: The One Relief, and Its $3,000 Ceiling
Oregon does offer something. It is narrow, it is capped, and almost no guide for British readers mentions it, so most expat tax Portland returns miss it.
What the Statute Allows
Under ORS 316.690, an Oregon taxpayer subtracts foreign income taxes from federal taxable income when computing Oregon taxable income. The subtraction applies where you elected to take those foreign taxes as a credit on your federal return, or where you did not itemise federally. In plain terms, claiming Form 1116 federally is what opens this Oregon subtraction.
The Cap That Limits It
Subsection (2) caps the relief. The foreign income taxes subtracted, added to the modification for federal income taxes, cannot exceed $3,000. For spouses filing separately, the limit is $1,500. Consequently, a household paying $25,000 of UK tax still subtracts no more than $3,000. At 9.9%, that is worth under $300 a year.
The Treaty Argument Was Tried, and Lost
British readers reasonably ask whether the US-UK treaty compels better treatment. Oregon's courts answered that question. In Whipple v. Department of Revenue, decided by the Oregon Supreme Court in 1990, the court held that no state or federal constitutional provision, and no treaty, requires Oregon to allow a larger deduction than this section permits. Therefore the ceiling stands, and arguing it is not a strategy.
Claim It Anyway
Small as it is, the subtraction is free money that expat tax Portland preparers routinely miss. We review three open years for it on every new expat tax Portland engagement. Additionally, the relief is most valuable to high earners. Oregon's separate federal tax subtraction phases out as income rises, which leaves the full ceiling available for foreign taxes.
Residency, the 200-Day Rule and the Section 911 Escape
Oregon's residency statute is unusually precise, and one paragraph of it is the best expat tax Portland news in this guide.
Domicile and the 200-Day Test
Oregon treats you as a resident if you are domiciled there. It also treats you as a resident if you are not domiciled in Oregon but keep a permanent place of abode there and spend more than 200 days of the year in the state. That day count is higher than the 183 days most states use. Importantly, any fraction of a day counts as a whole day.
Leaving Oregon: The 30-Day Rule
A domiciled Oregonian stops being a resident only on strict conditions. You must keep no permanent home in Oregon, maintain a permanent home elsewhere, and spend no more than 30 days of the year in the state. Consequently, keeping a Portland house for visits defeats the whole exercise. We plan departures around that 30-day figure well in advance.
The Section 911 Non-Resident Rule
Here is the paragraph that matters most. Oregon's definition of resident expressly excludes anyone who is a qualified individual under section 911(d)(1) of the Internal Revenue Code for the year. It also excludes their spouse, provided that spouse's principal home is outside Oregon. Therefore someone genuinely living and working abroad drops out of Oregon residency altogether, rather than arguing about exclusions.
British Green Card Holders Are Covered Too
The statute goes further, and this point is rarely noticed. It excludes a resident noncitizen under section 7701(b) who would qualify under section 911(d)(1) if they were a US citizen. Consequently, a British green card holder posted back to London can fall outside Oregon residency on the same terms as an American. That provision is the most valuable expat tax Portland rule for internationally mobile families.
UK Property, Pensions and Portfolios From Portland
Most British arrivals keep their UK assets. Therefore their treatment decides the real expat tax Portland cost.
UK Rental Profits
A British expat in Portland who lets a UK property pays UK tax through the non-resident landlord scheme. British nationals generally keep the UK personal allowance after leaving. Federally, Form 1116 relieves most of the American charge. In Oregon, Multnomah County and Metro, the profit is taxed again with no credit. Accordingly, UK rental income is the most heavily taxed item a Portland household holds.
UK Pensions
Oregon taxes pension income that is federally taxable, and the expat tax Portland treatment offers no general exemption comparable to Georgia's. Private UK pensions and SIPP drawdowns therefore reach the Oregon return in full. Under the treaty, Britain usually stops taxing a private pension once HMRC issues the right code, so there is rarely UK tax to subtract in any event. Social Security is not taxed by Oregon.
ISAs, Dividends and UK Funds
An ISA has no American equivalent, so its income is taxable federally and in Oregon. Britain charges a non-resident nothing on UK dividends, so no foreign tax exists to subtract. Similarly, UK funds are usually passive foreign investment companies federally, and that income flows into the Oregon base. Consequently, a UK share portfolio is taxed at the full local stack with no offset.
UK Workdays While Based in Portland
Many British executives here still travel to Britain for work. HMRC taxes pay for duties performed in the United Kingdom, whatever your residence. Your UK employer usually operates PAYE on that slice. Federally, Form 1116 relieves most of the American charge on it.
Oregon then taxes the same pay again. So do Multnomah County and Metro. The stack reaches roughly 13.9% on income Britain has already taxed. Only the capped ORS 316.690 subtraction softens it, and barely. Therefore we keep a contemporaneous workday diary for every client who travels. That record supports the UK apportionment, the federal credit and all three Oregon layers at once. Without it, each authority can challenge the split on its own terms, and the expat tax Portland exposure multiplies across four returns.
FBAR, Form 8938 and Missed Reporting
Any US person with foreign accounts above $10,000 in aggregate must file the FBAR with FinCEN. Separately, Form 8938 under FATCA applies at higher thresholds. Our FBAR and FATCA reporting service handles both. Where federal returns are late, the IRS offers the Streamlined Filing Compliance Procedures to taxpayers whose failures were not wilful.
Filing Mechanics the Local Taxes Demand
The Portland layers are separate taxes with separate returns, and UK income is exactly what trips them up.
Separate Returns, Separate Deadlines
The City of Portland Revenue Division administers the Multnomah County and Metro taxes. Each is reported on its own local return rather than on the Oregon return. Therefore filing Form OR-40 correctly does not discharge the local obligation. In our experience, this is the single most common expat tax Portland failure among new British arrivals.
Nobody Withholds on UK Income
Employers may withhold the local taxes from an Oregon salary. However, nothing is withheld from UK rental profit, UK dividends or a UK pension. Consequently, the local tax on your UK income must be paid through quarterly estimates or at filing, and underpayment interest applies where it is not. We set the estimate schedule from the UK figures each spring.
The Arrival Year and Part-Year Residence
Families arriving mid-year file part-year returns at state and local level. Oregon then taxes worldwide income only from the date residency begins, and the local districts apply their thresholds on a proportionate basis. Accordingly, the arrival year needs its own computation. Filing a full-year return instead hands three separate authorities months of pre-arrival UK income.
Records the Districts Will Ask For
Each layer can ask how a UK figure was built. We keep the HMRC computation, the non-resident landlord statements and the exchange-rate basis on file, reconciled to the federal return. Consequently, one set of evidence supports the federal, Oregon, county and Metro positions together, which is how an expat tax Portland file should be assembled.
The Columbia River Decision
No other city in this series offers a move of five miles that changes the expat tax Portland answer this much.
Washington Taxes No Income at All
Vancouver, Washington sits across the Columbia River from Portland, and it changes the expat tax Portland answer completely. Washington levies no personal income tax. Oregon taxes non-residents only on Oregon-source income, which means Oregon wages for work performed in Oregon. Consequently, a British family living in Vancouver keeps UK rents, UK dividends and UK pensions entirely outside Oregon, Multnomah County and Metro.
What Washington Charges Instead
Washington is not a free ride. It levies a capital gains tax on certain long-term gains, and its rules turn on domicile in a way British arrivals often misjudge. We cover that in our guide to British expats in Seattle and the Washington capital gains tax. Additionally, Washington sales tax is high, while Oregon charges none.
Running the Comparison Honestly
The right comparison models both sides of the river on your actual income mix. A family whose income is almost entirely Oregon salary saves relatively little. A family with large UK rents, dividends or a pending business sale can save five figures every year. Therefore we run the expat tax Portland comparison before a lease is signed, not after.
Worked Case Study: A British Family in Northeast Portland
Numbers make the expat tax Portland position concrete. This composite case uses 2026 figures.
The Position Before Review
Rachel and Tom are British nationals with green cards, living in Northeast Portland inside Multnomah County. Rachel earns $520,000 at a Portland technology company. They let a Bristol house producing UK profit of about $57,000, on which they pay roughly $8,240 of UK tax after her personal allowance. They also hold UK shares paying about $30,000 of dividends, which Britain does not tax for a non-resident.
Where the Money Went
Their UK rental profit and UK dividends sat at the top of the stack. Oregon took 9.9%, Multnomah County took 3% and Metro took 1%. That is roughly 13.9% on $87,000 of UK income, or about $12,090 a year. Crucially, the $8,240 already paid to HMRC reduced none of it. Their preparer had also never claimed the ORS 316.690 subtraction.
What Changed After Review
We claimed the foreign tax subtraction and amended the open years, which recovered a little under $300 a year. More importantly, we modelled a move across the river. Living in Vancouver would remove the UK rents and dividends from Oregon and both local taxes entirely. That saves about $12,090 each year, although Rachel's Oregon salary would still be taxed by Oregon. The family moved at the end of their lease.
The Wider Lesson
The statutory reliefs in Oregon are small, and no amount of technical work changes that. Instead, the decisions that matter are where you live and when you realise income. In our experience, expat tax Portland planning is geography first and paperwork second.
How TaxYork Can Help
We prepare US and UK returns together for high-net-worth British and dual national families across the Portland metro. Specifically, we compute the Oregon, Multnomah County and Metro positions alongside the federal and UK returns, claim the ORS 316.690 subtraction and test residency against the 200-day and 30-day rules. Furthermore, we handle missed FBAR filings, missed US tax returns and unreported UK pension or investment accounts through the right catch-up route.
Our work covers annual expat tax Portland compliance, the section 911 non-residency analysis for departing families, non-resident landlord reporting and Columbia River comparisons before a move. Our US tax return preparation service covers the federal and Oregon filings together. Professional guidance from the ICAEW and the Chartered Institute of Taxation informs how we document every position.
Conclusion
Portland asks more of a British household than any other city in this series. Oregon reaches 9.9%, Multnomah County adds up to 3% and Metro adds 1%, so UK rents and UK dividends can bear close to 13.9%. None of the three credits a penny of UK tax. The only statutory relief, under ORS 316.690, is capped at $3,000 including the federal tax subtraction, and Oregon's Supreme Court has confirmed that no treaty requires more.
However, two provisions repay close attention. The section 911 rule removes genuinely overseas families from Oregon residency altogether, green card holders included. Moving across the Columbia River removes UK income from all three layers. Ultimately, the expat tax Portland answer turns on residence rather than on reliefs. To summarise, decide where you live with the tax numbers in front of you.
Contact Us
If you hold UK property, pensions or investments while living in the Portland area, we can review your expat tax Portland position. Please contact us to discuss your circumstances, or book a consultation with a specialist who prepares both sides of the Atlantic. You can reach the team at hello@taxyork.com or on 020 3488 8606.
Disclaimer
This article provides general information only and does not constitute tax advice. Tax rules change frequently, and their application depends entirely on your individual circumstances. TaxYork accepts no liability for action taken or not taken on the basis of this content. You should obtain professional advice tailored to your position before acting. Useful background reading is available from the IRS international taxpayers pages and HM Revenue and Customs. Further guidance comes from MoneyHelper and Investopedia on the foreign tax credit.