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.

Output Format

## Your residency questions (to resolve with an adviser — not answered here)
[Days/presence · permanent home · centre of vital interests · domicile · split-year —
as questions for your situation]

## Traps to raise
[Dual residency & treaty tie-breakers · double-taxation relief · year-of-move split ·
exit taxes · foreign-account/asset reporting · remote-work-from-abroad]

## Fact pack to gather (before filing / before the adviser)
[Travel dates · home status per country · income types & source countries · prior
status · reporting obligations]

## Questions for a cross-border tax professional
[The tight, specific list · how to find a suitable adviser]

⚠ This is NOT tax advice and contains no figures or filings. Cross-border tax must be
handled by a qualified professional for your specific countries and situation.

Quality Checks

• Residency is framed entirely as questions to resolve with a professional — zero residency verdicts or filing guidance
• The dual-residency/treaty and year-of-move/remote-work traps are surfaced
• A concrete fact pack to gather is provided
• The output routes clearly to a qualified cross-border adviser and says why DIY is risky
• The not-tax-advice line is present and unambiguous

Anti-Patterns

• Do not give tax advice, figures, filings, or a residency determination — orient only, and route to a professional; this is the hard rule
• Do not interpret a specific treaty or country's rules as settled — flag that they apply and must be handled by an expert
• Do not understate the risk — missed foreign-asset reporting and double taxation carry real penalties
• Do not skip the remote-work-from-abroad trap — it's increasingly common and rarely anticipated
• Do not send the user off without a prepared question list — a focused consult is the whole value

Related

[[arrival-setup]] for the tax-number step; [[credit-from-scratch]] and [[healthcare-system-primer]] for the other newcomer systems; [[micro-retirement-planner]] if the move is a career break; [[financial-model-narrative|budget-variance-analysis]] neighbors for business finances — but a professional owns the tax itself.