What is citizenship by investment — and is it worth it?

Short answer: citizenship by investment (CBI) means obtaining a second nationality — and passport — in exchange for a qualifying investment, such as a donation, real estate or government bonds. Its cousin, residency by investment (RBI), grants the right to live somewhere (a "golden visa") rather than a passport. Both are core flags in flag theory: the citizenship and residency flags.

CBI vs RBI

	Citizenship by investment	Residency by investment
You get	A passport / nationality	The right to live there (golden visa)
Typical cost	Higher (often six figures and up)	Lower entry points
Timeline	Months to a couple of years	Often faster
Physical presence	Usually little or none	Often a minimum-days requirement

Well-known CBI programmes have historically included several Caribbean nations; RBI and golden-visa options exist across Europe, the Gulf and beyond. Programmes change often, so verify current rules before relying on any of this.

Why people pursue it

• Mobility — a stronger passport and more visa-free travel.
• Optionality and security — a second base and a "plan B."
• Tax positioning — but only when paired with genuinely changing tax residency. A passport alone rarely changes what you owe, and US citizens are taxed on worldwide income regardless of any second passport.

Is it worth it?

It depends entirely on your goal. For mobility and security it can be; as a pure tax play it is often misunderstood. The savings come from where you become tax resident, which usually means actually spending the days — or meeting the ties test — somewhere new. The OECD documents how each jurisdiction defines residence, and that is the part that changes your bill.

How Flags Tax helps

A second residency only helps if you maintain it: many golden visas require a minimum number of days each year, and your old country may still claim you until you have genuinely shifted your days and ties. Flags Tax rebuilds your day counts per country and US state from photos you confirm and flags home, family and work ties, so you can see whether you met — or stayed under — the relevant thresholds. It runs on your iPhone with no account and nothing uploaded. For the programmes themselves, international advisory firms go deep; Flags handles the day-by-day record underneath.

Not tax, legal or immigration advice. Programmes and rules change frequently — confirm with a qualified adviser.