The contactless limit is 80 CHF/EUR/USD (or equivalent) of accumulated purchases made without entering your PIN code.
However, from time to time you may be asked to enter your PIN code for purchases under 80 CHF. Not to test your memory (although that’s a helpful side effect) … but for security reasons to help prevent fraud.
You will always need to enter your PIN code for single purchases totalling over 80 CHF.
Additionally, you will need to enter your PIN code:
after ten contactless payments in a row, or
whenever the cumulative amount of contactless purchases in a row exceeds 500 CHF/EUR/USD. For example, if you have made eight purchases of 50 CHF and then two of 25 CHF using the contactless method, you will not be able to make another contactless purchase of 60 CHF, because the limit of 500 CHF has been reached.
Once you enter your PIN, the limit resets.