The jet ski deposit is $300 per ski, this is fully refundable as long as the customer follows instructions and training, and that the jet ski returns with no damage due to negligence by the driver. If you decide to do cash you will get it back immediately after the ride. If you decide to do the card, the amount will be charged and refunded to the same card. This process usually takes 3, but can take up to 10 business days depending on your bank to process it.