What if you don't ? What Swiss tax rule applies if, say at 65 I take my 100k 3rd pillar tax lump sum and stay resident in CH? Is it just seen as any other return on investment or does it have any special treatment.
You can calculate the pay out tax using this calculator:
https://www.postfinance.ch/en/suppor…m-payment.html
If you have multiple pillar 3a accounts you can cash-in one per year to lower the taxes. You cannot cash-in part of an account.
Afterwards it is treated like any other money/assets you have saved up.
Indeed it is a good idea to spread them out.
You can start withdrawing the 3 pillar 5 years before retirement age. If at retirement age you are still working, you also have 5 years after to withdraw.
It is a special tax rate which is used for pillar 2 and 3a lumpsum payouts. The tax rate does only depend on the payout amount and not on your other income.
It is roughly what you would pay in income tax for 1/20 to 1/10 of the pay out amount. In Canton Zurich 1/20 is used (was 1/10 up to the 2021). Some other cantons might have other rules, or even flat rates. YOu would have to check the tax laws of each canton. You can do this here https://www.lexfind.ch/
They are taxed at a special rate. The taxation depends on your canton of residence.
You can have a look here: