Frequently asked questions
The questions that come up most about Flag Theory and about how Flagzif works.
›Is Flag Theory legal?
Yes - as long as each decision is declared wherever the law requires it. Flag Theory is about deliberately choosing where to hold citizenship, tax residency, business, assets and domicile, instead of letting all of it default to your country of birth by inertia. What makes something illegal isn't living or paying tax in more than one place - it's withholding that information from whoever is legally entitled to it. Agreements like the CRS (Common Reporting Standard) already exchange bank data automatically between more than 100 countries; hiding isn't a realistic option anymore, and it isn't necessary either.
›Do I need to give up my citizenship to become a tax resident elsewhere?
No. Citizenship and tax residency are independent flags. You keep your passport of birth and, separately, can become a tax resident in another country that allows it - usually by living there a minimum number of days per year, or meeting another connecting-factor test set by local law. Renouncing citizenship is a separate, much rarer decision, usually driven by a different flag - the handful of countries that tax worldwide income by citizenship rather than residence.
›Can I be a tax resident of two countries at the same time?
Under each country's own rules taken in isolation, yes - but it's an unstable position. When two countries both claim you as a tax resident in the same year, double-taxation treaties usually have a tie-breaker test (permanent home, center of vital interests, nationality, in that order) that decides which one prevails for treaty purposes. Without a treaty between the two countries, the risk of being taxed by both at once is real. That's why the tax residency flag, in practice, tends to have one owner at a time.
›Does Flagzif replace a tax lawyer or immigration consultant?
No, and it doesn't try to. This is a comparison and discovery tool: it organizes public data so you can see the options and rule out what clearly doesn't fit. The final decision - especially on tax residency, which carries the biggest financial impact - depends on details of your case that no table captures: bilateral treaties, history of ties, income structure. Treat the score as a starting point for research, not a verdict.
›Why does the country I expected score low on a flag?
Two common reasons. The first is that the score is a percentile across 218 countries, not an absolute rating - a country can be good and still land in the middle of the table because others score better on that specific indicator. The second is data coverage: a country measured on few indicators has its score shrunk toward the center, so a data gap doesn't get rewarded as if it were real quality. The full methodology, with a concrete example, is on the methodology page.
›Do the quiz and the flag plan save my answers?
Not on our servers. Your answers travel in the URL itself (as query parameters), so you can bookmark the link, come back to it, or share it - but nothing is written to a database on our end. More detail on what is actually collected is on the privacy policy.
›Do I need to separate all five flags?
No - Hill's idea doesn't require all five. Most people never separate any of them: they're born, live, work and die in the same country, and the five flags coincide by inertia, not by choice. Separating a flag is only worth it when it solves a real problem you have - a tax that bites, a passport that blocks travel, an unstable home country. The flag plan page exists to show, from your profile, which ones are worth the thought and which probably change nothing.