Currency exchange at SBB Change or online always costs CHF 4, whatever the sum you buy. Additional shipping costs are changed in some cases.
Fees when you order at the counter.
Pick up at a counter: CHF 4 fee. Free if you hold a GA Travelcard.
Delivery to your address: CHF 4 fee (if you do not hold a GA Travelcard).
Fees when you order online.
Delivery to an SBB salespoint: CHF 4 fee.
Delivery to your address: CHF 4 fee.