Flag theory

Flag theory is a way of thinking about geographic diversification: do not place your passport, home, company, bank, investments, and lifestyle in one jurisdiction. For some people it improves mobility or reduces single-country risk. It is not a legal doctrine and it does not create a category called “tax resident nowhere.”

Every flag carries its own rules. A residence permit is immigration law; tax residency depends on domestic tests; a company has its own management, permanent-establishment, and substance questions; accounts can lead to reporting through CRS or domestic regimes. A country you leave may retain taxing rights over property, local work, exit gains, or its own departure period.

The responsible version is evidence-led. Keep accurate days, identify your real home, obtain residence certificates where relevant, model the company separately from the individual, and file transparent returns. If the plan relies on no one country being able to identify where you live or manage the business, it is a warning sign rather than a strategy. Diversification can be useful; concealment and invented facts are not.

Treat the concept as a prompt to diversify responsibly, then let the applicable statutes and treaties determine the tax result. That ordering avoids expensive wishful thinking.