Switzerland — Citizenship by Naturalisation (10 Years, 3 of Last 5)

Summary

Total residence

10 years (Art. 9 para 1 lit. b)

Recent residence

3 of the 5 years before applying

Childhood years

Ages 8–18 count double (min. 6 actual years)

Permit needed

C (settlement) permit at application

Cantonal minimum

2–5 years, set by your canton

Spouse route

5 years' residence + 3 years' marriage

Tracked as

1,095 days in the trailing 5 years (approximation)

Basis

BüG/LN SR 141.0, Arts. 9, 18, 21, 33

Swiss ordinary naturalisation (US: naturalization) is measured in years of registered residence, not days of physical presence. Under Art. 9 of the Swiss Citizenship Act (BüG/LN, SR 141.0) you need ten years of residence in Switzerland, three of which fall in the five years before you apply, and you must hold a C settlement permit when you file. Years you lived here between the ages of 8 and 18 count double, though your actual residence must still reach six years. On top of the federal floor, your canton and commune impose their own residence minimum — the Act allows them to require between two and five years — plus language and integration requirements they administer themselves.

Who it applies to

This is the standard route to a Swiss passport for foreign nationals living in Switzerland. It matters if you are:

• A long-term B or C permit holder counting toward the ten-year federal mark.
• Someone who grew up partly in Switzerland and wants to know how the double-counted years work out.
• Working abroad for a stretch and wondering whether it breaks your residence period.
• Deciding between the ordinary route and the shorter simplified route through a Swiss spouse.
• About to move canton or commune, where a fresh local minimum may start running.

Different provisions apply to spouses of Swiss citizens (simplified naturalisation, Art. 21), registered partners (Art. 10, which is a variant of the ordinary route), and third-generation immigrants born in Switzerland (Art. 24a). All are summarised below.

The rule — and why it exists

The federal requirements

Art. 9 BüG sets two formal conditions, and both must hold on the day you apply:

• A C settlement permit (para 1 lit. a). Not a B permit, not a pending upgrade — the settlement permit must be in hand. How you earn that permit is its own residence rule — see Switzerland's C permit residence requirement.
• Ten years of residence, three of them in the last five (para 1 lit. b). The three-of-five limb is what makes the requirement recent as well as long: a decade here twenty years ago is not enough.

Para 2 adds the childhood bonus: time spent in Switzerland between the 8th and 18th birthday counts double, but the actual length of residence must still amount to at least six years. So someone schooled here from 8 to 18 accumulates twenty countable years from ten actual ones, and someone with four double-counted childhood years still needs six real years in total.

The cantonal and communal layer

Art. 18 BüG lets the canton (and commune) require a residence period of their own, between two and five years. This is a genuine second clock: it runs on residence in that canton or commune, so moving can restart it. At the time of writing, for example, Zurich requires two consecutive years in the commune, while Aargau requires five years in the canton including three uninterrupted years in the commune — and Aargau has been debating tightening its rules further. Several cantons sit at two or three years. Treat every figure here as an example and check your own canton, because these change and the commune can add its own practice on top.

Integration

Arts. 11 and 12 BüG require successful integration: respecting public safety and order and the values of the Federal Constitution, communicating in a national language in speech and writing, taking part in economic life or acquiring an education, and encouraging the integration of your family. The cantons administer the assessment, including the language evidence.

Why it exists: naturalisation in Switzerland is a three-level decision — federal, cantonal, communal — and the residence requirements are how each level satisfies itself that you have actually lived among them, recently and for long enough to be part of the place.

Counting the days

Art. 33 BüG defines what counts as residence, and it is a permit test rather than a presence test:

• Counts in full: time holding a residence permit (B), a settlement permit (C), a Ci permit, or an FDFA identity card.
• Counts half: time spent on provisional admission (permit F), if you are later naturalised.
• Does not count: time as an asylum seeker (N) or on a short-stay permit (L), and any time in Switzerland before you had a permit at all.
• Para 2 — short absences are fine. Residence is not interrupted by short trips abroad taken with the intention of returning.
• Para 3 — long absences are not. Residence ends when you deregister, or when you actually live abroad for more than six months.

How Bounded approximates it — and where it is wrong

Only the three-of-the-last-five-years limb is day-shaped, so the Bounded counter tracks exactly that: 1,095 days (3 × 365) in Switzerland over a trailing five-year window, answering "how would the recent-residence limb look if I applied today?". It is an approximation, and it is wrong in both directions:

1. 1It can UNDERSTATE you. Registered residence continues through short trips abroad (Art. 33 para 2), but a day counter drops every day you were away — so a frequent traveller who has been legally resident the whole time will look short.
2. 2It can OVERSTATE you. Days spent here before you had a permit, on an L or N permit, or spanning a break in residence (deregistration, or more than six months abroad) still register as days in Switzerland — but they do not count as residence.
3. 3It says nothing about the other conditions. Reaching 1,095 does not make you eligible: the ten-year total, the C permit, the cantonal minimum, and the integration requirements all sit outside the day count.

Two practical mitigations. In Bounded you can set a start date on the citizenship counter — normally the date your qualifying permit was granted — so pre-permit days are excluded. And the six-month break that would end a residence period is precisely what the Swiss residence-permit counter alarms, so run the two together.

Examples

Example 1 — the straightforward decade

Rui arrived in Geneva on a B permit in 2014, moved to a C permit in 2019, and has lived in the same commune throughout. By 2026 he has twelve years of countable residence, the last five entirely in Switzerland, a C permit in hand, and well over his canton's minimum. The residence limbs are satisfied; what remains is the integration assessment and the cantonal and communal procedure.

Example 2 — childhood years doing the work

Ana lived in Lugano with her parents from age 10 to 18 on a B permit — eight actual years, counted as sixteen. She left for university abroad, then returned four years ago. Her actual residence is twelve years, comfortably over the six-year floor, and her counted total is well past ten. Because she has been back for four of the last five years, the three-of-five limb is met too.

Example 3 — the counter that looked better than the file

Daniel spent two years in Zurich as an asylum seeker on an N permit before receiving a B permit. His phone shows more than 1,095 Swiss days in the last five years, but the N-permit days do not count as residence at all under Art. 33 — the day count is ahead of his legal clock. Setting the counter's start date to his B permit grant date brings the two back into line.

Exceptions & edge cases

• Married to a Swiss citizen — simplified naturalisation (Art. 21). Three years of marital union plus five years' residence in Switzerland, including the year immediately before the application. No C permit is required. If you live abroad, the alternative in para 2 is six years of marital union plus close ties to Switzerland. It is called erleichterte Einbürgerung in German, sometimes translated "facilitated".
• Registered partnership (Art. 10). This is the ordinary route with a shortened clock, not the simplified one: five years' residence including the year immediately before the application, plus three years of registered partnership with a Swiss citizen.
• Third generation (Art. 24a). A simplified route for young people born in Switzerland whose grandparents and parents already had strong Swiss ties, with its own age limit and conditions.
• Provisional admission counts half. Time on an F permit is credited at 50% under Art. 33 para 1, which can pull an eligibility date forward by years for people who came through that route.
• Moving canton or commune restarts the local clock. The federal ten years are national, but the Art. 18 minimum is local. A move late in the process can delay you even when the federal limbs are long since satisfied.
• Losing your permit ends the whole thing. An absence over six months lapses your B or C permit under Art. 61 AIG and ends the residence period under Art. 33 para 3 BüG — the same trip costs you twice.

Cantonal and communal requirements are where most naturalisation files actually turn, and they change. Confirm the current figures with your cantonal naturalisation authority before you plan around them; the English translation of the BüG is informational only, with the German, French, and Italian texts being the authentic versions.

Common misconceptions

• "It's a day count like Canada's." It is not. Switzerland counts years of registered residence under a qualifying permit. Days are useful evidence for the three-of-five limb and nothing more.
• "Ten years anywhere in my past is enough." No — three of those years must fall in the five years immediately before you apply, and you must hold a C permit when you file.
• "Only C permit years count." No. B, C, Ci, and FDFA years all count in full; F counts half. The C permit is a requirement at the moment of application, not a filter on the past.
• "Meeting the federal rule means I can apply." Your canton and commune impose their own 2–5 year minimum under Art. 18, and they run the integration assessment. The federal floor is the start of the test, not the end.
• "Childhood years mean I can naturalise after five actual years." No — the double counting is capped by a floor of six actual years of residence.
• "EU/EFTA nationals naturalise faster." They do not. Nationality can speed up the C permit — citizens of settlement- agreement states qualify after five years instead of ten — but ordinary naturalisation stays ten years for everyone, whatever your passport.
• "Being tax resident builds citizenship time." It does not. Swiss tax residency follows Art. 3 DBG and can attach after 30 or 90 days of a single stay; naturalisation residence follows your permit under Art. 33 BüG. They are independent tests.

Frequently asked questions

Sources

• Fedlex — Swiss Citizenship Act (BüG/SCA, SR 141.0), Arts. 9, 10, 11, 12, 18, 21, 33
• SEM — Ordinary naturalisation
• Canton Zurich — Ordentliche Einbürgerung
• Canton Aargau — Ordentliche Einbürgerung