Swiss citizenship for new residents: 10 years, C permit

Most new residents can apply for Swiss citizenship after 10 years' residence in total, provided they hold a C permit when they apply and have spent 3 of the last 5 years in Switzerland. Only time on a B or C permit counts in full; your canton and commune add their own residence rules, and you need spoken French, German or Italian at level B1 and written skills at level A2. Spouses of Swiss citizens have a shorter, simplified route.

Key facts (as of September 2026)

• Ordinary naturalisation: C permit at application and 10 years' residence in total, 3 of them in the last 5 years (art. 9 para. 1 BüG).
• Years lived here between ages 8 and 18 count double, but actual residence must be at least 6 years (art. 9 para. 2 BüG).
• B and C permits count in full, F counts half, L and N do not count (art. 33 para. 1 BüG).
• Cantons require 2 to 5 years of residence in the canton (art. 18 BüG).
• Language: B1 spoken, A2 written in a national language (art. 6 BüV).
• Spouses of Swiss citizens: 3 years of marriage + 5 years' residence (art. 21 para. 1 BüG).
• Becoming Swiss ends lump-sum taxation for the whole tax period, for both spouses.

Who can apply for ordinary naturalisation

Ordinary naturalisation is the standard route for foreign nationals who have made Switzerland their home. The federal Citizenship Act (BüG) sets two formal conditions: you must hold a settlement permit (C) when you apply, and you must have lived in Switzerland for 10 years in total, including 3 of the 5 years before your application (art. 9 para. 1 BüG).

There is one helpful rule for families. Years spent in Switzerland between the ages of 8 and 18 count double, although the actual time spent here must still be at least 6 years (art. 9 para. 2 BüG). A child who arrives at 8 can therefore reach the 10-year count much sooner than their parents.

Naturalisation in Switzerland works on three levels: the Confederation, the canton and the commune. The federal conditions are the minimum. Your canton and commune run the procedure and add their own requirements, which is why two people with similar profiles can have quite different experiences in different places.

Which permits count towards the 10 years

This is the point that catches most people out. Not every year spent in Switzerland counts, and the permit you hold matters.

Source: art. 33 para. 1 BüG.

Two more details matter in practice:

• Long absences break the count. If you leave Switzerland for more than 6 months, your residence ends for naturalisation purposes (art. 33 para. 3 BüG). Moving abroad for a year, even with plans to return, can restart the clock.
• L permits count for the C permit but not for citizenship. For non-EU nationals, time on an L permit can count towards the 10 years needed for a C permit, but it does not count for naturalisation. The two clocks are not the same.

First you need the C permit

Because a C permit is a precondition, the real timeline often depends on how quickly you can obtain one. That varies by nationality (SEM directives on the AIG, §0.2.1.3 and §3.5; art. 34 AIG):

Anyone with 5 years of continuous B residence can also ask for an early C permit if they are well integrated and can communicate well in the local national language: B1 spoken and A1 written (art. 34 para. 4 AIG; art. 62 VZAE). Note that this is a lower written level than the A2 required for naturalisation.

We explain the permits themselves in Swiss permits explained.

Cantonal and communal residence rules

On top of the federal 10 years, each canton sets a minimum period of residence in the canton, which must be between 2 and 5 years (art. 18 BüG). Communes may add their own rules too.

This matters if you move within Switzerland. A family that spends several years in one canton and then moves to another may need to build up residence in the new canton before applying there. If citizenship is a long-term goal, it is worth factoring this into the choice of canton from the start. Our guide to the best cantons for wealthy families looks at that choice from other angles.

Language and integration

The federal language requirement is B1 spoken and A2 written in one of the national languages (art. 6 BüV). Since your application is handled by cantonal and communal authorities in the local language, that is usually the practical choice.

Language is only one part of integration. The authorities also look at how you take part in Swiss life more generally, and cantons and communes assess this in their own way. The criteria and the way they are tested vary from place to place, so it is worth checking the practice of your canton and commune well before you apply rather than relying on general descriptions.

Simplified naturalisation for spouses of Swiss citizens

If you are married to a Swiss citizen, a faster route applies. Simplified naturalisation requires 3 years of marriage and 5 years' residence in Switzerland in total, including the year immediately before you apply (art. 21 para. 1 BüG).

If you live abroad with your Swiss spouse, you can still apply after 6 years of marriage, provided you have close ties to Switzerland (art. 21 para. 2 BüG).

Citizenship and lump-sum taxation

For many of the people we work with, this is the most important section. Lump-sum taxation is reserved for people who are not Swiss. Swiss dual nationals count as Swiss and are excluded (ESTV Circular 44, §2.2).

The consequences are immediate:

• Acquiring Swiss citizenship ends the lump sum for the whole tax period in which you naturalise, not just from the date of the decision.
• Both spouses must meet the conditions. If one spouse becomes Swiss, the couple loses the regime (art. 14 para. 2 DBG; Circular 44, §2.4).
• Once you move to ordinary taxation, you generally cannot return to the lump sum.

So if you are taxed on a lump sum, the timing of a naturalisation application is a tax decision as much as a personal one. It is worth modelling ordinary taxation in advance, including wealth tax in your canton, before you apply. Our guides on lump-sum or ordinary taxation and Swiss lump-sum taxation explain the comparison.

There is no citizenship by investment

Swiss citizenship cannot be bought. The federal rules above tie naturalisation to years of residence, a C permit, language and integration. There is no investment amount that shortens the process, and no residence permit based on an investment amount either. We cover the permit side in does Switzerland have a golden visa?.

A realistic timeline for a new resident

For a non-EU family arriving today on a B permit, the path typically looks like this:

1. Years 1–5 or 1–10: live in Switzerland on a B permit and work towards the C permit (timing depends on nationality and integration).
2. C permit: once granted, check the cantonal and communal residence minimums.
3. Year 10 onwards: apply for ordinary naturalisation, if 3 of the last 5 years were spent here and your language skills meet B1 spoken and A2 written.

Processing times after the application vary by canton and commune; there is no single published timeline. EU and EFTA nationals follow the same naturalisation rules. Their advantage is usually a faster route to the C permit, as the table above shows.

How we help

We help new residents plan their permits with the long term in mind: which permit to start with, how to avoid breaks in residence, and how a future naturalisation fits with lump-sum or ordinary taxation. If you are still choosing your route to Switzerland, start with our eligibility check.

This guide is general information as of 30 September 2026; a ruling or specific advice is needed for your own situation.