How we research tax-residency rules
Yuravia’s country pages are reference information about a serious subject, so we hold them to a simple standard: every rule comes from a primary tax-authority source, carries the date a human last checked it, and is honest about what a day count can and cannot tell you. Here is exactly how that works.
Maintained by Quentin Dupard, founder of Yuravia · last updated 2026-06-27
Who maintains this
The tax-residency rule set is maintained and reviewed by Quentin Dupard, the founder of Yuravia. To be clear about what that means: we are not a tax-advisory firm, and nothing here is personal tax advice. What we are is accountable — a named person checks each rule against its official source and signs the date on it, so you know who stands behind the information and how fresh it is.
Where the rules come from
Each country page is built from the primary source — the national tax authority or the statute itself — not from secondary blogs. We name that authority on every page and link it (HMRC, the IRS, France’s DGFiP, Spain’s Agencia Tributaria, Australia’s ATO, and so on), and we cite the specific article where one exists (for example Art. 4 B of France’s Code Général des Impôts, or Art. 9.1 of Spain’s Ley 35/2006). Where official and secondary sources disagree, the official text wins.
How we keep them current
Tax rules change, so every country page shows a last-reviewed date. A review means a human re-checked the rule against the official source on that date. New research goes through an adversarial second pass — one reviewer proposes the rule and a second independent check tries to refute it — before anything is published, which is how we’ve caught and corrected real errors (a country with no statutory day rule wrongly labelled as having one, a counting window that was calendar-based rather than rolling, a threshold off by a few days). If we’re not confident, we hold the page rather than guess.
What a day count can — and can’t — tell you
This is the most important thing on the page. The day count is the one residency test a tool can actually calculate, and it’s what Yuravia tracks for you. But it is rarely the only test. Most countries can also treat you as resident through a permanent home, your family, your centre of economic or vital interests, your domicile, or your immigration status — none of which depends on counting days. We list those “other ways” explicitly on each country page and flag that we can’t track them for you. Staying under a day threshold is necessary, not sufficient — and two countries can claim you at once.
Not tax advice
Yuravia is an alerting and reference tool, not a substitute for a qualified adviser. Definitive tax residency depends on facts beyond day counts, and the consequences are significant — so before you make a decision, confirm with the official source we link and, where it matters, a professional in the relevant country.