Blog · 2026-07-17

Dual citizenship in 2026: where it's allowed, where it's banned, and what it really costs

"Dual" and "second" citizenship are not the same thing in law, and confusing the two has cost people passports, money and peace of mind. Here's who permits a second passport, who still demands renunciation, and which obligations only surface after the document is in your hand.

Dual citizenship and a second passport are two different things

Everyday language treats them as synonyms. The law does not. Dual citizenship in the strict sense exists where two states have signed a treaty recognising a person as a national of both at once, with obligations divided between them: where you serve, where you pay tax, whose consul protects you. Such treaties are vanishingly rare.

A second (or multiple) citizenship is the ordinary case: you hold two passports, and each state regards you as exclusively its own national, ignoring the other document entirely. That is how almost every two-passport holder actually lives.

Paraguay is the textbook illustration. Its constitution (Article 149) allows multiple nationality "by international treaty", yet Law 7052, passed in 2022, explicitly removed the obligation for naturalised foreigners to renounce their nationality of origin. Formally it is a second citizenship rather than a dual one - and it behaves exactly the way an investor needs it to. The details are on our page on Paraguay citizenship by investment.

Where a second passport raises no eyebrows

Most of the world is relaxed about multiple nationality, including nearly every jurisdiction that runs a serious investment or naturalisation route.

• Paraguay - no renunciation, and a territorial tax system that leaves foreign-source income untaxed.
• Türkiye - multiple citizenship permitted; the citizenship-by-investment route has required $400,000 in real estate since 2022.
• Argentina - naturalisation is open, and Argentine nationality acquired by birth cannot constitutionally be stripped. The mechanics are covered under Argentine citizenship.
• The Caribbean - Antigua and Barbuda, Grenada, St Kitts and Nevis, St Lucia, Dominica. No renunciation, minimal physical presence. Following the islands' 2024 agreement, minimum contributions start at roughly $200,000. See the full citizenship programmes overview.
• Portugal, Ireland, the United Kingdom - multiple nationality permitted. One caveat on Portugal: naturalisation timelines were under revision upwards through 2025-2026, so verify the current text of the law before filing.
• Germany - since 27 June 2024, multiple citizenship is allowed both for those naturalising and for Germans acquiring a foreign passport. It is a complete reversal of the old policy; see German citizenship.
• The United States - dual nationality is not encouraged in principle but recognised in practice. The naturalisation oath contains renunciatory language, yet Americans do not lose US citizenship by taking a second passport.
• Malta - multiple citizenship itself is fine, but the investment route is gone: on 29 April 2025 the Court of Justice of the EU found the Maltese investor naturalisation scheme incompatible with Union law. What remains is set out under Maltese citizenship.

Where you still have to give up the first passport

Roughly thirty countries insist on a single nationality, and the mechanisms differ in ways that matter.

• China - the strictest model. Chinese nationality is lost automatically the moment a foreign one is voluntarily acquired. No application, no notice, no warning.
• Japan - requires a choice. Someone who becomes a dual national after 18 has two years to elect one nationality. Japanese courts upheld the constitutionality of the rule in 2025; no reform has followed.
• India - no dual citizenship. The substitute is the Overseas Citizen of India card, which restores most rights but not voting, public office or agricultural land ownership.
• Austria - renunciation is mandatory, with narrow exceptions for nationality by birth and for extraordinary service to the republic.
• Singapore - single citizenship, documented renunciation required; those born dual must choose by 21.
• Kazakhstan - second citizenship is prohibited, and holders must report it and surrender the Kazakh passport within 30 days. Penalties are administrative today, but parliament has been debating criminal liability.
• Ukraine - the historic ban has been partly lifted. Law 4502-IX took effect on 16 January 2026, permitting multiple citizenship with countries on a Cabinet-approved list (initially Canada, the US, Germany, Poland and Czechia). Russian citizenship is expressly excluded.

Country-by-country: status and the catch

Positions are stated as of 2026. Nationality law moves quickly - re-verify before you file anything.

The notification duty Russian citizens keep missing

Russia does not ban a second passport, but it does require you to declare it. The deadline is 60 days from acquiring the second citizenship or a foreign residence permit. If the document was issued abroad and you remain outside the country, the clock starts on the date you next enter Russia.

Filing is done in person at a migration unit of the Interior Ministry, through the state services portal, or via a Russian consulate abroad. Late or incorrectly completed filings draw an administrative fine of 500-1,000 roubles. Deliberate concealment is a criminal offence carrying a fine of up to 200,000 roubles - or one year's income - or up to 400 hours of compulsory labour.

The practical consequence matters more than the fine: inside Russia, a two-passport holder is treated purely as a Russian national, with every obligation that entails.

Four risks that surface too late

Military service. A second passport can carry a conscription obligation with it - Türkiye, Greece, Israel, South Korea and Singapore are the usual names. Rules for naturalised citizens are typically softer than for those born into the nationality, but that is something to confirm before applying, not after.

Tax. A passport does not by itself make you a tax resident; the notable exception is the United States, which taxes citizens on worldwide income wherever they live. What does change your position is moving - and citizenship applications often come bundled with a move. What happens to your obligations back home is covered in our section on tax and tax residency.

Consular protection stops at the border. This is the most underrated point. Under the master nationality rule, codified as far back as the 1930 Hague Convention, a state is under no obligation to grant foreign consuls access to someone it considers its own national. In the country whose passport you hold, your other passport will not help you.

Arriving on the wrong document. The universal rule is that you enter and leave a country of your citizenship on that country's passport. The US requires it of its citizens outright, and Russia and most other states have equivalent provisions. Attempting to enter your own country on the other passport is not a clever workaround - it is a conversation in a secondary inspection room.

Choosing a second passport without creating a conflict

The sequence is the same at every budget. First confirm that your current country tolerates multiple nationality - if it does not, the question is closed before it opens. Then check whether the receiving country demands renunciation. Then price the tax consequences and any service obligation. Only after all that do you compare timelines, cost and passport quality.

If the direct route to a passport turns out to be blocked, there is almost always an intermediate one. Residency creates no conflict of nationalities and often solves 80% of the actual problem, from banking access to freedom of movement. We set out the trade-offs under residence permits and residence by investment; faster naturalisation routes such as Kyrgyz citizenship only make sense once you have checked them against the passport you already hold.

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