Dual citizenship in Switzerland: rules for expats

If you are planning to make Switzerland your permanent home, you will be pleased to know that Swiss citizenship does not come at the expense of your current passport. Switzerland has allowed dual citizenship unconditionally since 1992, meaning you can enjoy the full rights of a Swiss citizen while keeping your original nationality intact.

But, holding two passports is a two-way street. Your ability to become a dual citizen depends just as much on your home country’s legal stance, as well as the specific naturalisation rules of the canton where you live. For the wider process, start with Expatica’s guide to Swiss citizenship. This guide explains the main routes, what Swiss dual nationality changes in practice, and what to verify before you apply.

Key takeaways

• Confirm Dual Nationality: Switzerland permits dual citizenship, but you must verify that your home country also allows you to retain your original nationality.
• Identify Your Route: Determine if you qualify for ordinary naturalisation (typically requires 10 years of residence and a C permit) or simplified naturalisation (often for spouses or specific family cases).
• Check Local Requirements: Review the specific residence, test, and documentation requirements set by your local canton and commune, as these can differ from federal rules.
• Verify Official Status: Always cross-reference your eligibility and procedural steps with official sources like the State Secretariat for Migration (SEM) and your local authority.
• Assess Ongoing Duties: Be aware that naturalisation can impact military service, tax obligations, and consular protection, depending on your personal circumstances and the laws of your other country.
• Gather Documentation Early: Start preparing your civil-status, residence, and language proficiency documents ahead of time to streamline the application process.

Can you have dual citizenship in Switzerland?

Yes, Switzerland fully recognises dual nationality and has done so unconditionally since 1 January 1992, according to the State Secretariat for Migration (SEM). Taking on a Swiss red passport does not require you to renounce your original nationality under Swiss law.

However, holding two passports is always a two-way street. While Swiss authorities place zero restrictions on your current citizenship, your home country may enforce its own rules, such as requiring prior permission or even relinquishing your original passport upon naturalisation. It is a well-trodden path, though, and Federal Statistical Office figures show that around 21% of Swiss residents aged 15 and over hold dual nationality.

• Foreign nationals can become Swiss and keep another nationality if the other country allows it.
• Swiss citizens can usually acquire another nationality without losing Swiss citizenship.
• Children of parents with different nationalities may hold more than one citizenship from birth.
• If you are unsure, check the law of the other country before you apply.

How can you get dual citizenship in Switzerland?

You do not apply for dual citizenship as a standalone status in Switzerland. Instead, you apply for Swiss citizenship through one of the standard naturalisation pathways, and dual nationality becomes the automatic result as long as your home country allows you to keep your original passport.

Through ordinary naturalisation

For most expats, the main route is ordinary naturalisation. Federal rules usually require 10 years of residence in Switzerland, including three of the last five years, plus a C permit.

• Residence years can count differently if you lived in Switzerland between ages 8 and 18.
• You need successful integration, suitable language skills, and familiarity with Swiss life.
• Cantons and communes may add local residence periods, interviews, or tests.
• Common mistake: a C permit is required for this route, but it is not citizenship.

Check the federal process on ch.ch and then confirm local rules with your commune or canton.

Through simplified naturalisation

Simplified naturalisation is a faster route for specific family situations. It often matters most to spouses of Swiss citizens and some third-generation foreign nationals.

For spouses living in Switzerland, the broad baseline is five total years in the country, the year before applying in Switzerland, and three years married to and living with the Swiss spouse.

One thing worth knowing is that marriage alone is not enough. You still need to show integration and provide the right evidence. If you are sorting out residence first, our family visas in Switzerland guide explains that process, which is separate from citizenship.

By birth, descent, or other routes

Switzerland mainly follows descent, not birthplace. In other words, being born in Switzerland does not usually make you Swiss if your parents are not Swiss.

• Children of Swiss parents may be Swiss from birth.
• Children born in Switzerland to non-Swiss parents are not usually Swiss automatically.
• Adoption, reinstatement, and mixed-nationality family cases carry their own requirements, so use the main citizenship route that fits your family history.

What does dual citizenship mean in practice?

Once your naturalisation goes through, the focus shifts to how holding two passports impacts your daily life. Most international residents want to know what actually changes regarding travel freedom, voting rights, civic duties, and admin.

Rights, passports, and voting

Swiss citizenship gives you a stronger status than residence because you are no longer dependent on permit renewals. You can live in Switzerland as a citizen, vote at federal level, and apply for a Swiss passport.

If you are comparing citizenship with residence, the key question is long-term security. A permit can be renewed or lost in some circumstances, while citizenship gives you total, peace of mind.

Duties, military service, and consular limits

Dual nationality also comes with duties and limits, and this is where many readers get caught out.

• Swiss military rules can still apply to some dual nationals.
• Military service is normally done in the country where you live at recruitment.
• If you already completed military service in another country, you will not be called up in Switzerland.
• Consular help can be limited when you are in the country of your other nationality.
• Tax or civil duties may continue in the other country, depending on your personal situation.

Why cantons and communes still matter

Switzerland’s dual nationality rule is federal, but naturalisation is still processed through cantonal and communal layers in many cases. This is different from a fully centralised system, and it explains why neighbours in Zurich and Vaud can face different steps.

• Confirm when your local residence period starts counting.
• Ask whether interviews, tests, or extra documents apply.
• Check total fees and the office that receives your application.

What should you check with your other country?

Switzerland might give you the green light for dual citizenship, but your home country might say no, not yet, or only under specific conditions. Double-checking your native country’s rules early on is essential, saving you money and hassle before you start gathering documents or paying Swiss application fees.

Dual citizenship: Switzerland and the USA

If you are looking into dual citizenship for Switzerland and the US, the good news is that both nations permit it. The US Department of State confirms that American citizens can naturalise in a foreign country without giving up their US passport, though holding dual status means managing legal obligations to both nations.

It is worth remembering that citizenship and tax obligations operate under different rules. Unlike most countries, US taxes are based on citizenship rather than residence. IRS regulations require US citizens living abroad to file annual returns on their worldwide income, regardless of where they live or hold dual passports. Because of these ongoing reporting requirements, US-linked applicants often benefit from seeking specialist tax advice before submitting a Swiss naturalisation application.

Common checks for other nationalities

For any other country, do not rely on forums or family anecdotes. Use a repeatable check.

• Whether voluntary acquisition of Swiss nationality is allowed.
• Whether you must notify an embassy, consulate, or ministry first.
• Whether military, civil, or tax duties continue after naturalisation.
• Whether you need to update passports, civil records, or overseas registration.

Practical checklist before you apply

Your exact application depends on the route, but most expats should prepare the same core admin early.

What to check	Why it matters	Where to verify
Route	Different rules apply	SEM and your local authority
Residence and permit status	A C permit is usually needed for ordinary naturalisation	Federal rules and canton
Language proof	Wrong certificates can delay an application	Local checklist
Fees and timing	Costs and waiting times vary widely	Commune or canton

One common mistake is assuming a broad citizenship guide is enough. In Switzerland, local procedure can change the real workload.

If you maintain financial ties in another country, carefully plan how you will manage salary transfers, family support, or savings across borders. While major local institutions such as UBS, PostFinance, and Zürcher Kantonalbank can facilitate international payments, expats with regular cross-border financial needs often find that a specialist provider or a multi-currency account offers the flexibility required for life as a dual citizen.

Useful Resources

Information checked 10th August 2026

• State Secretariat for Migration: official government source for understanding Swiss dual nationality rules and requirements.
• Swiss Authorities Online: a comprehensive guide on the naturalization process for foreign nationals living in Switzerland.
• Cantonal naturalisation authorities: a directory that allows you to find the specific local cantonal or communal offices responsible for processing your naturalization application.