Tax Residency Primer

Tax Residency Primer Skill

Cross-border tax is where confident people make expensive mistakes, because moving countries can leave you tax-resident in two places at once, owing tax you didn't expect, or missing a treaty benefit that would have saved thousands. This skill does exactly one thing well: it orients you — the factors that determine residency, the traps to watch, and the specifics to pin down — so that your conversation with a qualified cross-border tax professional is short and productive. It is emphatically not tax advice, gives no figures or filings, and its main output is often "here's why you need a professional, and here's exactly what to ask them."

What This Skill Produces

• A residency-question map: the factors tax systems actually use (days present, permanent home, centre of vital interests, domicile, the split-year rules) framed as questions to answer for your situation — not conclusions
• The trap list: dual residency, double taxation, the year-of-move split, exit taxes, reporting of foreign accounts/assets, and remote-work-from-abroad complications — so none ambush you
• A document/fact checklist: what to gather before filing or before seeing an adviser (travel dates, home ownership/rental, income sources and countries, prior-country status)
• The questions for a professional: a tight, specific list so a cross-border tax adviser can resolve your situation efficiently — plus how to find one

Required Inputs

Ask for (if not already provided):

• The countries involved (moved from → to) and the date of the move
• The rough shape of income (employment, self-employment, investments, foreign income, remote work for a foreign employer) — categories only, no amounts needed
• Ties to each country (home owned/rented, family, days spent, prior residency)
• What's prompting the question (an approaching filing deadline, a job, uncertainty)

Framework

1. Frame residency as questions, never a verdict. Tax residency turns on factors like days present (and the specific counting rules), where your permanent home is, your centre of vital interests, and sometimes domicile — combined differently in every country. The skill lays these out as questions to answer with an adviser; it does not declare you resident anywhere.
2. Surface the dual-residency and treaty reality. You can be resident in two countries simultaneously; double-tax treaties then have "tie-breaker" rules and relief mechanisms — but they must be claimed correctly. Flag that this is likely in a move year and that the treaty (if one exists) matters, without interpreting it.
3. Name the year-of-move and remote-work traps. The move year is the messiest — split-year treatment, part-year residency, income sourced before/after the move. And working remotely from a new country for an old-country employer creates residency, payroll, and even permanent-establishment questions people rarely anticipate. Flag these prominently.
4. Build the fact pack. The adviser will need: precise travel/presence dates, home status in each country, income types and their source countries, prior tax status, and any foreign-account/asset reporting obligations (which carry heavy penalties if missed). Gathering these in advance turns an expensive open-ended consult into a focused one.
5. Route to a qualified professional — and say why. Cross-border tax genuinely needs an expert (a cross-border/expat tax adviser or accountant covering both countries). The skill's honest deliverable is a well-prepared client with the right questions, and the clear message that DIY here risks real money and legal trouble.