Can US citizens have dual citizenship? Yes — and the answer is simpler than the anxiety surrounding the question. United States law permits an American to hold one or more additional nationalities. You are not asked to choose, and you do not hand back your US passport by naturalising elsewhere. The confusion is understandable, because dual citizenship for Americans sits at the junction of two very different bodies of law: nationality law, which is permissive, and tax law, which is not. This article separates them. It is general information only, not legal or tax advice.
Can US Citizens Have Dual Citizenship? The Legal Position in Plain English
The US Department of State states plainly that you can hold dual citizenship in the United States, and that a person may hold more than two nationalities under the same guidance. Americans usually become dual nationals by birth in the US to a parent of another nationality, by birth abroad to US-citizen parents, or by naturalising in the US while keeping an existing nationality — to which add the case most of our clients ask about: acquiring a second citizenship as adults.
What US law does not do is force a choice. Nothing obliges you to renounce what you hold, and nothing penalises you for adding to it. Our overview of dual citizenship covers the fundamentals, and holding multiple citizenships deals with three or more. The real constraint, where one exists, usually comes from the other country rather than from Washington: some states prohibit dual nationality outright. Check the law of the country you are joining, not only your own.
Losing US Citizenship Requires Intent, Not Accident
Every myth in this area grows out of misreading this point. Under the Immigration and Nationality Act, US nationality is lost only where a person commits one of a defined set of expatriating acts — naturalising in a foreign state, swearing allegiance to one, formally renouncing before a consular officer abroad, among others — and does so voluntarily and with the intention of relinquishing US nationality. Both limbs must be satisfied, and intention is the operative word.
That is why the ordinary case costs an American nothing: someone who takes a second citizenship while plainly intending to remain American has not met the intent test, and the State Department generally treats US nationals who naturalise abroad as intending to keep their nationality. Renunciation is a serious and effectively irreversible step with its own legal and tax consequences — a matter for a US immigration attorney and a tax specialist, never for an article.
The One Rule Every American Dual National Must Follow
Enter and leave the United States on your US passport. The State Department is explicit that US citizen dual nationals must use their US passport to enter and depart, and may not enter on a foreign one. Two related points catch families out: US citizens are not eligible for a US visa, so there is no visa to be stamped into your second passport; and a US-citizen child needs a US passport to travel in and out with you, even if you have never formally documented that child's citizenship.
Elsewhere you may generally travel on whichever passport serves you best, though the country of your other nationality may require its own. Two further realities deserve mention: in a country where you are also a national, local authorities may decline to recognise your US nationality and consular assistance can be limited; and some states impose military service or registration obligations. None of this argues against a second citizenship — it argues for going in with your eyes open.
Can US Citizens Have Dual Citizenship and Lower Their Taxes? No
This is the biggest misconception we encounter, and it deserves stating without hedging: a second citizenship does not reduce your US tax obligations. The United States taxes its citizens on worldwide income regardless of where they live or what else they hold. As the IRS puts it, a US citizen is subject to tax on worldwide income from all sources, whether living in Boston or Bridgetown. The foreign earned income exclusion and foreign tax credits relieve double taxation — they do not end the obligation, or the duty to file.
Reporting obligations run alongside. US persons are generally required to report foreign financial accounts under the FBAR and FATCA regimes, and the balances that trigger them are lower than most people assume. Discretion is not a strategy either: foreign financial institutions report accounts held by US persons, and well over a hundred jurisdictions exchange account information automatically. A second passport does not make an account invisible. Our guide to taxes on a second citizenship covers how tax residency actually works. Thresholds and reliefs change, so take proper cross-border tax advice.
Four Myths About Dual Citizenship for Americans, Corrected
- "You must renounce your US citizenship to take another." No. Nothing in US law requires it, and the intent test means an ordinary second citizenship does not put your status at risk.
- "The US doesn't allow dual citizenship." It does, expressly. Where a prohibition exists it almost always comes from the other country's law.
- "A second passport cuts your US taxes." It does not. Citizenship-based taxation follows the citizen, not the passport they travel on.
- "A second citizenship lets you hold accounts quietly." It does not. FATCA and automatic information exchange mean account data reaches tax authorities regardless of which passport opened the account.
Which Second Citizenships Americans Actually Choose
The real question is what the second citizenship is for: mobility and a family safety net point one way, the right to live in Europe another. The Caribbean citizenship programs dominate on speed, while European routes are residency-first and slower by design. Our guide to citizenship by investment for US citizens works through the trade-offs.
| Route | Why Americans consider it | Indicative timeline | Indicative cost |
|---|---|---|---|
| Caribbean CBI (Antigua & Barbuda, Dominica, Grenada, St Kitts & Nevis, St Lucia) | Speed, visa-free mobility, a family safety net; no residence requirement | Roughly 4–9 months | From approximately US$200,000 by donation; real estate from roughly US$200,000–$325,000+ |
| Grenada | The only Caribbean CBI country with a US E-2 treaty; broad visa-free access | Roughly 4–9 months | In line with other Caribbean programs |
| Portugal (residency first, citizenship later) | The right to live in the EU. The residential real-estate route was removed in 2023; fund and other routes remain | Residency in months; citizenship typically after about five years | Varies by route |
| Malta (residency route) | EU residency via the Malta Permanent Residence Programme. The investor-citizenship route was ruled contrary to EU law by the Court of Justice of the European Union in April 2025 and wound down — an EU passport is not purchasable there | Residency in months; citizenship only after years of lawful residence | Varies by option |
Program terms and thresholds change — we'll confirm the current figures for your situation on a call. One point is widely muddled: an American does not personally need an E-2 visa, because a US citizen already has the right to live and work in the United States. Grenada's E-2 treaty route matters mainly where the household includes people who are not US citizens — a foreign spouse or adult child wanting to run a business in the States.
For most Americans the legal answer is a clean yes, the passport rule is easy to live with, and the tax position is unchanged — which is exactly why a second citizenship should be chosen for what it genuinely delivers: mobility, optionality, and a settled place for your family to go if circumstances demand it. Bought as a tax plan, it will disappoint.
If you are weighing your options, we are happy to talk it through candidly — including the cases where our honest answer is that a second passport will not change what you hoped to change. Book a free, confidential consultation with Jane Katkova and our team, and we will map the realistic routes for your family.