Everyone does things differently, but generally by wire or electronic transfer.
Some companies do take credit cards. We will take Credit Cards outside of 60 days with a 3% surcharge
On All-inclusive Charter in the Caribbean, outside of 6 months, 25% of the charter fee is due, 25% is due at 6 months out and the balance is paid 2 months prior to your yacht charter.
On larger yachts and in other locations, 50% of the charter fee is due when you book the charter, and the balance, along with any provisioning, tax, and repositioning fees, is due 6 weeks prior to the charter dates.