Old Age and Survivor’s Insurance (OASI)
OASI is designed to cover basic subsistence needs if a person loses their income from gainful employment owing to old age or death. OASI provides benefits in old age (retirement pension) or pays survivors a widow’s, widower's or orphan's pension. The benefits depend on the amount of the latest income and contribution period. Generally speaking, all people who live or work in Switzerland are subject to compulsory OASI insurance.
Further information is available @ ‹Contributions and benefits›
or, more detailed, in German, French and Italian.