Tax Residency & Relocation

Three words get used interchangeably here, and the difference between them is where the money sits. Citizenship is a permanent legal relationship with a country — a passport, a right of return, something passed to children. Residency is permission to live somewhere, applied for and maintained. Tax residency is the third and least visible: the jurisdiction entitled to tax you, decided not by what you hold but by where your life demonstrably is.

The gap carries a price. Of the five Eastern Caribbean citizenship programs, only St. Kitts & Nevis and Antigua & Barbuda levy no personal income tax on residents — Dominica taxes residents at rates up to 35%, Grenada up to 28% and St. Lucia up to 30%, as Dan sets out in his survey of the countries with zero income tax in 2026. Even in the two zero-tax states, presence rather than paperwork creates tax residency, generally on a 183-day standard.

Dan's shorthand: a passport buys mobility, a residency buys permission, and tax residency is arithmetic. The jurisdiction map sits on the residency by investment overview.

Every route here rests on a two-sided test: entry is what the new jurisdiction requires of you, exit is what the old one will accept before it lets go. Most of the attention goes to the first half; most of the money is lost on the second.

Entry begins with presence, and the thresholds vary more than most people expect. Puerto Rico's Act 60 runs on the familiar 183 days, alongside a tax home and closer connections on the island, a primary residence purchased within two years and a $10,000 annual donation to Puerto Rican nonprofits. Anguilla's High Value Resident program asks 45 days a year on-island. The Cayman Islands residency certificate asks 30 days; Bermuda's Economic Investment Residential Certificate expects 90 days a year for five years. Dan puts the day-count question before the price question, because presence eliminates more shortlists than cost does.

Day counts are a floor. Most systems ask a second question the calendar cannot settle: where is the center of your life? The wording differs by jurisdiction and the substance converges — where a permanent home stands available to you, where a spouse and children are, where economic interests and a professional base sit. Puerto Rico's version, the tax-home and closer-connection tests, is the one American families meet first. Substance beats paper: under the Common Reporting Standard, financial accounts are reported to the jurisdiction where you claim tax residency, so a certificate with no days and no home behind it is an audit flag rather than a plan.

Moving to a zero-tax country does not end your home country's claim on you. Canada, the United Kingdom and most of Europe determine tax residency by ties — homes, spouses, day counts, economic interests — and several charge an exit tax on the way out. I triggered Canada’s departure tax myself when I left in 2020: until residency is severed under the rules of the country you are leaving, the new address is a rounding error.

For American families the exit half barely exists, and that is the point. The United States taxes its citizens on worldwide income wherever they live. A second passport changes nothing about a federal filing: none of the five Caribbean citizenship programs holds a US income tax treaty, and FATCA attaches to US-person status rather than to the passport you hand the teller. The Foreign Earned Income Exclusion shelters US $132,900 for 2026 — earned income only, so salary qualifies while capital gains, dividends, interest and rent do not.

Dan's framing, set out at length in his article on why second citizenship for Americans is an insurance policy, not a tax play, is to buy the passport for mobility, jurisdictional diversification and optionality, and to price the tax question separately. The route-by-route American playbook sits on second citizenship for Americans.

When the goal really is the tax bill, Dan sequences residency before citizenship: settle where the family will genuinely be tax-resident, then layer the passport on for mobility. Act 60 is where most American families land, because it changes the math inside the US system — 4% on qualifying export-services income and 0% on new capital gains for Individual Resident Investor applications filed by December 31, 2026, with no expatriation. Families consolidating substantial mobile wealth weigh Anguilla's flat tax instead: US $75,000 a year plus a qualifying property of US $400,000 or more, against zero income, capital-gains and inheritance tax. That zero describes Anguilla's tax system, not an American's global tax position, which stays with the IRS regardless of residence or second passport. Territorial systems such as Panama's carry the same caveat.

Each year a small number of American families conclude that the recurring cost of citizenship-based taxation outweighs what the passport still does for them. The dedicated page on renouncing US citizenship covers that route plainly, and two facts govern it. The exit tax is not automatic: it reaches only a covered expatriate — a $2 million net-worth threshold written into law in 2008 and never adjusted for inflation, an average-tax-liability test over the five years before expatriation, or the inability to certify five years of clean filings. And the sequence is fixed: the second citizenship is settled first, because no responsible advisor lets a client renounce into statelessness. The State Department's fee fell from $2,350 to $450 in April 2026; the exit tax did not move.

Dan runs the sequence the same way almost every time, because reversing it is what creates the expensive corrections.

The mistakes repeat. Buying a passport and expecting a tax result is the first and costliest. Counting the entry days and never the exit is the second. Third, mistaking an immigration permit for tax residency — the UAE's Golden Visa is a residence permit, and tax residency there is a separate test. Fourth, thin substance: the certificate with no home and no life behind it. Fifth, timing a liquidity event badly, since Act 60 covers gains arising after the move. Sixth, assuming Caribbean means tax-free, when three of the five citizenship islands tax their residents.

I run this sequence with your accountants and counsel in the room. I hold the property, citizenship and residency pieces, and I make sure all three agree before anyone signs anything — that coordination is what the international tax planning practice exists to do. — what the international tax planning practice exists to coordinate.