No, "Confirmed" reservations imported from Non-Exclusive Inventory Listings to Guesty won't be added to the bill, even if the account is charged per reservation.
The payment process for non-exclusive inventory listings is separate from reservations made via Guesty. Importing iCal reservations will only block dates on your Guesty calendar, so that you'll know which dates are available. Ph wa
Learn more about importing a Non-Exclusive Inventory Listing's Calendar to Guesty and syncing a Non-Exclusive Inventory Listing’s Calendar.