Introduction: Expat Tax Philadelphia Rules Stack Two Taxes on Your UK Income
The expat tax Philadelphia position is unusual because two governments below Washington tax you. Pennsylvania charges a flat 3.07% on its own definition of income. Philadelphia then adds a resident rate of 3.735% on wages, business profits and certain investment income. Neither gives any credit for tax you pay to HMRC. Consequently, a British family in Rittenhouse Square can pay roughly 6.8% on UK income that Britain has already taxed.
At TaxYork, we prepare returns for British bankers, pharmaceutical executives, academics, founders and retirees across Philadelphia and the Main Line. In our experience, most arrivals file the Pennsylvania return and never discover the City taxes at all. Others file both but miss the one Pennsylvania exemption that helps them. Therefore the expat tax Philadelphia answer depends on knowing both layers in detail.
Expat Tax Philadelphia Basics: Four Systems, One Household
A British household in Philadelphia deals with four tax systems. First, federal income tax reaches worldwide income, softened by the foreign tax credit on IRS Form 1116. Second, Pennsylvania taxes income at 3.07%. Third, the City levies its own resident taxes. Fourth, the United Kingdom keeps taxing UK property, UK workdays and some pensions. Accordingly, sound expat tax Philadelphia compliance runs all four as a single computation.
Who This Guide Is Written For
This guide addresses high-net-worth British nationals, dual national US UK families and accidental Americans living in Philadelphia and its suburbs. Specifically, it suits company owners, investment professionals, senior executives and retirees who keep UK property, pensions and portfolios. If your household income reaches six figures, every expat tax Philadelphia rule below carries a real cost. For the national picture, read our complete guide to UK expat tax in the USA.
How Philadelphia Compares With Other Cities We Cover
We have written about several other states in this series. Arizona credits UK tax on Form 309, the rare state that does. Georgia credits no foreign tax but honours the foreign earned income exclusion. Massachusetts adds a 4% surtax above $1,107,750. Philadelphia is different again, because the City layer reaches UK income directly. As a result, the expat tax Philadelphia bill is often higher than the modest state rate suggests.
How Pennsylvania Builds Its Own Tax Base
Pennsylvania does not start from your federal return. Instead, it builds income from scratch, and that choice drives almost every expat tax Philadelphia outcome.
The Flat 3.07% Rate
Pennsylvania charges a single 3.07% rate on taxable income. The rate has not changed in over twenty years. Moreover, Pennsylvania offers no standard deduction and no personal exemption. Therefore the rate applies from the first dollar of each class of income, which suits high earners more than it appears.
Eight Classes, and No Netting Between Them
Pennsylvania divides income into eight classes. They include compensation, net business profits, gains on property, rents and royalties, dividends, interest, estate or trust income, and gambling winnings. Crucially, a loss in one class cannot reduce income in another. Consequently, a loss on a UK rental flat cannot offset your Philadelphia salary, however large the loss. The Pennsylvania personal income tax guide on classes of income sets out the rules.
No Foreign Earned Income Exclusion
Because Pennsylvania ignores federal adjusted gross income, the foreign earned income exclusion never reaches the Pennsylvania return. That exclusion stands at $132,900 federally for 2026. However, a Pennsylvania resident pays 3.07% on every dollar of pay earned abroad. Georgia and Arizona, by contrast, let the exclusion flow straight through.
Why the Separate Base Matters for Britons
Most British arrivals assume their state return mirrors the federal one. In Pennsylvania, it does not. Accordingly, federal planning rarely transfers, and every expat tax Philadelphia file needs its own Pennsylvania analysis rather than a copy of Form 1040.
The Expat Tax Philadelphia Credit Pennsylvania Withdrew
This section contains the fact most guides state briefly and none explain for British readers.
Act 52 of 2013 Removed Foreign Countries
Pennsylvania once allowed its resident credit for tax paid to a foreign country. Act 52 of 2013 ended that from 1 January 2014. Since then, the definition of "state" for the resident credit excludes every foreign country. The Pennsylvania resident credit schedule, PA-40 Schedule G-L, confirms the rule. Therefore UK tax paid to HMRC earns no Pennsylvania relief.
Why Form 1116 Stops at the Federal Return
The federal foreign tax credit operates inside the Internal Revenue Code only. Pennsylvania computes its own liability and applies its own credits. Consequently, excess federal credits and carryovers reduce nothing in the expat tax Philadelphia computation. Our treaty and double tax relief service handles the federal side, yet the Pennsylvania charge on UK income remains.
Where Relief Still Exists
Relief comes from exemptions rather than credits. Pennsylvania exempts qualifying retirement income, Social Security and gains on a principal residence in many cases. Additionally, the class system itself shelters some items, because Pennsylvania simply does not tax certain receipts the federal code includes. Therefore the expat tax Philadelphia strategy is to classify income correctly, not to hunt for a credit that no longer exists.
The Philadelphia Layer: Wage Tax, Net Profits Tax and School Income Tax
The City taxes are where British families lose the most money, usually without knowing it. They are the heart of the expat tax Philadelphia problem.
The Wage Tax Reaches Pay Earned Anywhere
Philadelphia residents owe the Wage Tax on compensation wherever the work is performed. From 1 July 2026, the resident rate is 3.735%, down slightly from 3.74% under the City's phased cuts. Employers usually withhold it. However, if a UK employer pays you for London workdays, nobody withholds it, and you must file and pay through the City's Earnings Tax return. We have found no mechanism that credits HMRC tax against it.
The Net Profits Tax Can Reach a UK Rental
The City's Net Profits Tax applies to residents on business profits wherever the business is carried on. Furthermore, the City treats most rental of property as a business. Consequently, net profit from a London flat can fall within the Philadelphia Net Profits Tax at the resident rate. This is the single most expensive surprise in expat tax Philadelphia work.
The School Income Tax on Dividends
Philadelphia also levies the School Income Tax on residents' unearned income, including dividends and royalties. For 2026, the rate falls to 3.735%. Therefore a British executive holding UK shares directly may owe City tax on those dividends as well as Pennsylvania tax. Interest from ordinary bank accounts is generally outside it, so the treatment depends on the income type.
How the Layers Combine
Add the layers together and UK rental profit can bear 3.07% in Pennsylvania and about 3.7% in Philadelphia. That is roughly 6.8% on income that already carries UK tax, with no credit at either level. Accordingly, the expat tax Philadelphia cost of keeping a London buy-to-let is materially higher than in most American cities.
Your UK Pension in Pennsylvania
Pension treatment is where Pennsylvania becomes generous, provided the pension qualifies. It is also the brightest spot in expat tax Philadelphia planning for retirees.
The Eligible Employer Plan Exemption
Pennsylvania exempts distributions from an eligible employer-sponsored retirement plan once you retire after meeting the plan's age or service conditions. Importantly, the test looks at the plan's terms, not at whether it is American. Consequently, a UK occupational pension from a former employer can qualify, provided it meets Pennsylvania's eligible-plan criteria. In our experience, this point alone recovers thousands of dollars for British retirees.
SIPPs and Personal Pensions
A SIPP or personal pension is not employer-sponsored. It therefore falls outside that exemption. Pennsylvania applies its own cost-recovery rules to such plans, so the contributions you made can matter to the taxable amount. Accordingly, good records of what you paid in become valuable decades later.
The UK State Pension and Social Security
Pennsylvania does not tax Social Security. Whether it treats the UK State Pension the same way is not settled in published guidance, so we take and document a position on each return. Meanwhile, Britain does not tax the State Pension for a US resident under the treaty. Therefore the State Pension needs a deliberate decision rather than a default.
Early Withdrawals Still Hurt
The exemption applies only after retirement under the plan's terms. A distribution taken before meeting those conditions is taxable in Pennsylvania. Consequently, timing a UK drawdown before or after the scheme's normal retirement age changes the expat tax Philadelphia outcome considerably.
Residency and Domicile in Pennsylvania
Pennsylvania residency is easy to acquire and slow to lose, which matters for every expat tax Philadelphia plan.
Domicile or 183 Days With a Home
Pennsylvania treats you as a resident if you are domiciled there. It also treats you as a resident if you keep a permanent place of abode in the state and spend more than 183 days there. The two routes are independent. Therefore a British family renting in Society Hill for a two-year secondment will usually be resident.
City Residency Follows Your Home
Philadelphia's resident rates apply to people who live in the City. Commuters from the Main Line or New Jersey pay the lower non-resident rates on Philadelphia work only. Consequently, where you rent or buy decides whether the City layer reaches your UK income at all. In our experience, that choice is the largest single expat tax Philadelphia planning decision a family makes.
The Arrival Year
Families arriving mid-year file as part-year residents, so the expat tax Philadelphia arrival year needs special care. Pennsylvania then taxes worldwide income only from the date residency begins. Many arrivals file a full-year return instead, handing the Commonwealth months of pre-arrival UK income. We correct that error frequently.
Where You Live: City, Main Line or New Jersey
The address you choose shapes the expat tax Philadelphia bill more than any other decision. Three options dominate for British families, and each taxes UK income differently.
Living Inside the City
A home in Rittenhouse Square, Society Hill or Fairmount brings every resident tax. The Wage Tax reaches all pay, the Net Profits Tax can reach a UK rental and the School Income Tax reaches dividends. Consequently, City living suits families whose income is mostly American salary with little UK property or portfolio income. For a family holding a London buy-to-let and a UK share portfolio, the City layer becomes a permanent annual cost.
Living on the Main Line
A home in Bryn Mawr, Radnor or Villanova keeps you in Pennsylvania but outside the City. You still pay 3.07% to the Commonwealth on worldwide income. Additionally, most suburban municipalities levy a local Earned Income Tax, commonly around 1%, on pay and business profits. However, that local tax generally does not reach dividends, and Philadelphia's resident taxes no longer apply. If you work in the City, you pay only the non-resident Wage Tax on Philadelphia work. Therefore the Main Line often produces the lowest expat tax Philadelphia result for a family with substantial UK investment income.
Living in New Jersey
Many executives choose Haddonfield, Moorestown or Princeton instead. New Jersey applies graduated rates reaching 10.75% on income above $1 million. Moreover, New Jersey gives no credit for tax paid to a foreign country, so UK tax earns no state relief there either. New Jersey does credit tax paid to other American jurisdictions, including Philadelphia Wage Tax on City work. Consequently, New Jersey rarely beats the Main Line for a high earner with UK income, although it can suit families with modest investment income.
Running the Comparison Properly
A useful comparison models all three addresses on your actual income mix, not on headline rates. Salary, UK rents, UK dividends and pensions each land differently in each place. In our experience, the answer changes with the size of the UK portfolio more than with salary. Therefore we run the comparison before a lease is signed, because moving later triggers part-year returns in two jurisdictions.
UK Workdays and the Payroll Problem
Many British executives in Philadelphia keep working in London for part of the year. That pattern creates a stack of charges on the same pay, and it is the costliest expat tax Philadelphia pattern we see.
Britain Taxes the London Days
HMRC taxes pay for duties physically performed in the United Kingdom, whatever your residence. Your UK employer usually operates PAYE on that portion. Federally, the foreign tax credit on Form 1116 relieves most of the American charge on the same pay. Therefore the federal position is usually close to neutral.
Pennsylvania and the City Tax It Again
Pennsylvania taxes the same London pay at 3.07%, with no credit. The City then charges its resident Wage Tax on it too. Accordingly, a London workday for a Rittenhouse Square resident can bear UK tax, a federal residue, Pennsylvania tax and City tax together. That stacking is the defining feature of expat tax Philadelphia compliance for internationally mobile executives.
Keeping a Workday Record
Every expat tax Philadelphia figure above depends on counting days correctly. We recommend a contemporaneous diary of UK and US workdays, reconciled to travel records. Consequently, the UK apportionment, the federal credit and the Pennsylvania and City returns all rest on the same evidence. Without it, each authority can challenge the split independently.
UK Property, Portfolios and Reporting From Philadelphia
Most British arrivals keep UK assets. Therefore their treatment shapes the real expat tax Philadelphia cost, often more than salary does.
UK Rental Profits Under the Non-Resident Landlord Scheme
A British expat in Philadelphia who lets a UK property pays UK tax through the non-resident landlord scheme. Federally, Form 1116 relieves most of the American charge. In Pennsylvania and Philadelphia, nothing relieves it. Moreover, Pennsylvania computes net rents under its own rules, so depreciation and expenses may differ from both the UK and federal figures.
Selling a UK Property
Britain taxes non-residents on gains from UK residential property, generally on growth since April 2015. Pennsylvania taxes the whole gain in its property class at 3.07%, with no credit, so a London sale is a major expat tax Philadelphia event. The City position on the sale depends on whether the letting was carried on as a business. Therefore take advice before exchanging contracts, not after completion.
ISAs and UK Funds
An ISA has no American equivalent, so its income is taxable federally and in Pennsylvania under the relevant class. Similarly, UK funds are usually passive foreign investment companies federally. Pennsylvania classifies fund income under its own rules, which rarely match the federal treatment. Accordingly, UK fund holdings need a separate Pennsylvania computation.
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.
Worked Case Study: A British Banker in Rittenhouse Square
Numbers make the expat tax Philadelphia position concrete. The following composite case uses 2026 figures.
The Position Before Review
Henry, a British national with a green card, works for a Philadelphia asset manager and lives in Rittenhouse Square. He earns $900,000, including $110,000 for 30 workdays in London. Additionally, a Clapham flat produces UK profit of about $63,500. He also receives about $40,000 of dividends from UK shares held directly. His wife Clare, aged 62, draws a UK occupational pension of about $31,750 after retiring at her scheme's normal age.
What the Review Found
His previous preparer filed accurate federal and Pennsylvania returns but never filed any City return for non-withheld income. Consequently, the Clapham profit had escaped the Net Profits Tax and the UK dividends had escaped the School Income Tax. Together, that exposure came to roughly $3,870 a year. Meanwhile, Pennsylvania had taxed Clare's occupational pension in full at 3.07%, costing about $975 a year.
What Changed After Review
We confirmed the pension met Pennsylvania's eligible-plan conditions and amended three open years, recovering about $2,900. We then filed the missing City returns voluntarily before any City notice arrived. Settling proactively kept the matter to tax and interest, rather than an assessment with penalties. Going forward, Henry and Clare pay the City correctly and pay nothing in Pennsylvania on the pension.
The Wider Lesson
Nothing here required aggressive planning. Instead, it required knowing that Philadelphia taxes residents on income earned outside the City. In our experience, expat tax Philadelphia households rarely overpay the state. They underpay the City, and that exposure grows every year it goes unnoticed.
How TaxYork Can Help
We prepare US and UK returns together for high-net-worth British and dual national families across Philadelphia. Specifically, we classify UK income under Pennsylvania's eight classes, test pensions against the eligible-plan exemption and file the City returns that UK income triggers. 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 Philadelphia compliance, City Wage Tax on UK workdays, Net Profits Tax on UK rentals and residency evidence for families moving in or out. In addition, we coordinate with UK advisers so all returns agree. Professional guidance from the ICAEW and the Chartered Institute of Taxation informs how we document every position.
Conclusion
Philadelphia combines a low state rate with a City layer that reaches UK income directly. Pennsylvania charges 3.07% on its own base, ignores the foreign earned income exclusion and has credited no foreign tax since 2014. On top, the City charges residents about 3.7% on pay earned anywhere, on business profits including most rentals, and on dividends.
However, relief exists for pensions. A UK occupational pension can escape Pennsylvania tax entirely once you retire under the scheme's terms. Ultimately, the expat tax Philadelphia outcome depends on filing every layer and classifying every item correctly. To summarise, check the City returns first, because that is where the exposure usually sits.
Contact Us
If you hold UK property, pensions or investments while living in Philadelphia, we can review your expat tax Philadelphia 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.