EU nationals: You don't need a visa for Switzerland if the stay is less than 90 day. Those who plan to stay longer will need a residence permit.
Non-EU nationals mentioned in the chart above: Americans, Australians, British and
Canadians can travel to Switzerland, and any other Schengen countries, without a visa
for up to 90 days in any 180 day period. This applies if you travel as a tourist, to visit
family or friends, to attend business meetings, cultural or sports events. For other
purposes, you need to check with the embassy, high commission or consulate of
Switzerland in your home country on what type of visa and/or work permit you may
need.
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