My employer sent out an interesting letter about the option of buying back pension for the time employee wasn't working in Switzerland.

Has anyone in the forum done this?
Would it be worth doing it if I'm not planning on staying in Switzerland forever and might want to leave in 5-8 years?
Would the boought-back pension money go to the AVS or 2nd pillar?

Thank you

Done this with Pillar 2, some tax optimization from that. You normally get a letter from your provider listing what amount exactly still can be paid in. It is capped the first 5 years in Switzerland.

Yes, I bought all the back years from age 25 until I lived in CH, the investment return over the next 10 years was so poor, investing the net amount after tax would have outperformed substantially.

It goes to the 2nd pillar.