UK Online Sellers: Operating From US but Selling to UK (Tax Residency Problem)
- The Double Taxation Problem
- Tax Treaty Relief
- AskBiz International Income Tracking
- The Statutory Residence Test, in Plain Terms
- Moving to Dubai, Keeping the Shopify Store Running
- Company Residency Is a Separate Question From Where You Live
- Record-Keeping Habits for an Internationally Mobile Seller
- How AskBiz Gives Your Accountant Clean Source Data
UK citizen moves to US, runs eCommerce selling to UK customers. Declares UK-source income to HMRC (subject to 20% UK tax). Also files US tax (subject to ~37% US tax if in US >6 months). Double taxation without treaty relief = 57% tax rate. AskBiz tracks income source, identifies relief options.
- The Double Taxation Problem
- Tax Treaty Relief
- AskBiz International Income Tracking
- The Statutory Residence Test, in Plain Terms
- Moving to Dubai, Keeping the Shopify Store Running
The Double Taxation Problem#
UK tax: resident on worldwide income. US tax: if physically present >183 days/year, taxed as resident. Both claim right to tax UK-source income.
Tax Treaty Relief#
US-UK tax treaty allows home-country tax relief. Example: owe £4K UK tax, £6K US tax = £10K before relief. With treaty: claim foreign tax credit. Pay whichever is higher (usually US), get credit against the other = ~£6K total.
AskBiz International Income Tracking#
Tags income by source (UK, US, other). Calculates tax liability in both jurisdictions. Shows relief available. "UK-source income: £50K. UK tax due: £10K. US tax due: £18.5K. With treaty relief: pay £18.5K total (US higher). Save £10K vs. double taxation."
The Statutory Residence Test, in Plain Terms#
Whether an individual counts as UK tax resident in a given year is governed by a structured set of rules generally referred to as the statutory residence test, and it is considerably more nuanced than the popular shorthand of "spend fewer than a set number of days in the UK and you're fine." In broad terms, the test looks at how many days you spend in the UK during the tax year, combined with a set of connecting factors sometimes called "ties" — things like whether you have UK-based family, UK accommodation available to you, UK work, and how much time you spent in the UK in prior years. The fewer ties you have, generally the more days you are permitted to spend in the UK before residence is triggered, and vice versa. This is directional guidance rather than a precise formula anyone should rely on without professional advice, because the actual day thresholds shift depending on exactly which and how many ties apply to that specific individual's circumstances. The practical takeaway for a UK online seller weighing a move abroad is that residence is not simply a matter of being physically outside the UK for most of the year — retained ties like a UK spouse, a UK home kept available, or regular UK work can pull someone back into UK tax residence even with relatively limited physical presence, which is precisely why this area trips up people who assume the rules are simpler than they actually are.
Moving to Dubai, Keeping the Shopify Store Running#
Consider a UK-born online seller who built a moderately successful home-goods brand on Shopify and Etsy while living in Manchester, and then relocated to Dubai partly for lifestyle reasons and partly on the belief that living somewhere with no personal income tax would simplify her finances. She kept the same UK limited company, the same UK business bank account, and continued managing suppliers, customer service, and marketing personally from her new base, visiting the UK for roughly six weeks a year to see family. A year and a half later, preparing accounts, her accountant flagged two separate problems she had not considered. First, her personal UK tax residence position was not automatically severed just by living abroad most of the year — the ties test meant her situation needed proper analysis rather than assumption, particularly given her continued UK family connections and periodic UK work trips. Second, and more consequentially, the company itself might still be UK tax resident regardless of where she personally lived, because company residency is assessed separately from personal residency. She had assumed that moving herself to Dubai meant her income would simply stop being taxed in the UK, and that assumption turned out to be only partially true at best, requiring a proper review of both her personal position and the company's position independently.
Company Residency Is a Separate Question From Where You Live#
This is the point that catches out the largest number of UK founders who relocate: a company's tax residence is not determined by where its director happens to be physically living, but by where its central management and control actually takes place. If the founder continues to make the substantive business decisions — approving major spending, setting strategy, directing suppliers, signing off on key contracts — while sitting in Dubai or Lisbon or wherever they have relocated to, HMRC's view can be that central management and control has effectively followed the founder abroad, or alternatively that it never left the UK at all if board-level decisions are still being made with reference to UK-based advisers, UK board meetings, or a UK registered office functioning as more than a mailbox. There is no simple physical-presence formula for this the way there is a rough day-count guide for personal residency — it is a facts-and-circumstances test that looks at where the real decision-making happens. A founder who wants their company's tax residence to genuinely follow them abroad needs to actually relocate the substance of the decision-making — board meetings, key approvals, banking relationships — not just their own physical address, and a founder who wants the company to remain UK resident needs to be deliberate about keeping genuine UK-based decision-making in place rather than letting it drift by accident. Either outcome can be fine; the problem is when nobody has decided which one is actually true and the paperwork does not match the reality.
Record-Keeping Habits for an Internationally Mobile Seller#
Because residence determinations under the statutory residence test hinge heavily on days spent in each country and the nature of ties retained, the single most valuable habit an internationally mobile online seller can build is a contemporaneous, defensible day count — not a reconstruction attempted eighteen months later from flight confirmation emails and hazy memory. A simple log noting arrival and departure dates for every country visited, kept updated in real time rather than backfilled, becomes the foundational evidence if a residence position is ever challenged. Alongside the day count, keeping a record of where substantive work actually happened — which supplier calls, strategic decisions, or major approvals took place in which country — supports both the personal residency case and, separately, the company's central-management-and-control case. It is also worth keeping evidence of the practical ties that the statutory test cares about: tenancy or property records showing where accommodation is or is not available, evidence of family location, and records of any UK work undertaken during visits home. None of this is exciting bookkeeping, but sellers who maintain it consistently are the ones who sail through a residency review, while sellers who do not are the ones facing a slow, expensive process of trying to reconstruct a year of travel history from bank statements and memory under time pressure from HMRC or the IRS.
How AskBiz Gives Your Accountant Clean Source Data#
The tax residency and treaty-relief questions above are ultimately decided by an accountant or tax adviser, but the quality of that advice depends entirely on the quality of the underlying data they are given to work with, and this is where most internationally mobile sellers fall down — not on the tax law itself, but on having clean records to hand over. AskBiz tracks sales by customer geography as a normal part of order processing, so a seller can produce, at any point, a clear breakdown of exactly where revenue is genuinely coming from by country, rather than an accountant having to manually sort through a year of mixed Shopify and Etsy exports to reconstruct it. Combined with expense tracking that separates UK-incurred costs from costs incurred elsewhere, this gives an accountant the raw material to build both the personal source-of-income analysis and the treaty-relief foreign tax credit calculation without weeks of reconstruction work at year end. For a seller running the business through Xero, AskBiz keeps this geographic and expense data aligned with the company's accounting records, so the numbers the accountant uses for the UK tax residency conversation and the numbers used for day-to-day bookkeeping are the same numbers, rather than two slightly different pictures that then need to be reconciled before any tax advice can even begin.
People also ask
Do I owe UK tax if I move abroad?
Yes, on UK-source income (customers, assets). Depends on tax residency status. Consult accountant.
Our team combines expertise in data analytics, SME strategy, and AI tools to produce practical guides that help founders and operators make better business decisions.
Optimize International Tax (Avoid Double Taxation)
AskBiz tracks income by source, jurisdiction tax liability. Identifies treaty relief options. Save £5K-20K annually. Try free.
Connects to Shopify, Xero, Amazon, QuickBooks, Stripe & more in minutes