FlagSageThe seven flags of an international life
Flag theory splits a life across borders into seven connections. Each can sit in a different country, and each has its own rules and its own professionals.
The seven flags are citizenship, tax residency, company, banking, assets, living base and digital. They are separate, but they interact. Where you live can affect where you are taxed, and where you are taxed can affect what your bank reports.
Citizenship and passports
Citizenship is a legal bond with a state, and only that state's nationality law decides who has it. It is separate from the permission to live somewhere and from tax residence: a passport does not by itself decide where you are taxed, and a residence permit does not by itself make you a citizen. Each route, and whether a second nationality is accepted, has to be checked in the law of every country involved.
Read the guide Flag 2Tax residency
Each country decides tax residence under its own law, and there is no universal 183-day rule. Countries use day counts, homes, family and economic ties, domicile and, in the United States, citizenship, and tax treaties settle some cases where two countries both claim the same person. Moving often, or staying under a day count everywhere, does not by itself end tax residence.
Read the guide Flag 3Company
Where a company is incorporated is only the first question. Many countries also tax a company where it is actually managed and controlled, and controlled foreign company rules in the owner's country can tax the owner's side on a foreign company's income. Beneficial ownership registers and bank checks record who is behind a company, and a company abroad does not change its owner's own tax residence.
Read the guide Flag 4Banking
Each bank decides whether to open or keep an account, and residence, tax residence and the source of the money all shape that decision. Under the Common Reporting Standard and FATCA, banks collect each account holder's tax residence or US status and report account information to tax authorities. Deposit protection is set country by country and has to be checked for each institution.
Read the guide Flag 5Assets
Where an asset sits and where its owner lives are two different facts, and countries can attach rules to either one. A residence country may ask you to report accounts and property abroad, the country where an asset sits may tax it or govern how it passes on death, and these duties can apply at the same time.
Read the guide Flag 6Living base
A living base is the place you actually spend your time, and the right to be there comes from immigration law. A visa or residence permit answers whether you may enter, stay or work. It does not answer whether you are tax resident there, and it does not prove you have stopped being tax resident somewhere else.
Read the guide Flag 7Digital
Your digital flag is the set of domains, online accounts and data you rely on, and the rules of the providers and countries behind them. Providers decide access using your legal residence, identity and sanctions screening. A VPN, a virtual address or a digital identity card does not change your legal residence or what a provider must do.
Read the guideHow the flags interact
A flag is a connection to a country, not a status you choose freely. Moving your living base can make you tax resident there. Your tax residence decides what your bank reports and to whom. Your citizenship decides which consulate helps you, and in a few countries whether you are taxed abroad. A company is usually taxed where it is managed, which can follow you.
That is why FlagSage keeps each flag on its own page and shows where they meet, instead of offering a single plan. A professional in each country decides how they combine for you.
- Countries covered
- 40 countries in examples
- Sources
- Each guide lists its sources
- Tax year
- Current rules as checked
- Review
- Not professionally reviewed
Sources checked November 8, 2026