I had an offer from a tax advisor to set it up for 3,000chf & 300chf on a monthly basis! Crazy, when all it really needs is filling in a form and sending it to SVA

However what is complex is often the SVA people don't seem to know the rules, and for the UK they keep changing thanks to Brexit.

For example, I have heard different things about whether a Pillar 2 / BVG pension is required when working for a UK company. And depending on your nationality, you get treated differently it seems, not just about where your employer is. eg. below from SVA application form

"Gleiches gilt für Schweizerinnen und Schweizer sowie Bürgerinnen und Bürger eines anderen EFTA-Staatesmit einem Arbeitgeber in der EFTA (ohne Schweiz).Für Arbeitnehmende mit anderer Nationalität gelten die Bestimmungen unter dem Titel «Arbeitgeber mit Sitz ausserhalb der EU oder EFTA».