This depends on when you book in conjunction with when you depart. With Disney World and Disneyland all that is required is a $200 deposit to get started. You then have up to 30 days prior to departure to pay the balance off. Disney Cruise Line requires a 20% deposit and the balance is typically due 45-120 days in advance depending on your itinerary. All other suppliers work the same way, requiring a small deposit and balance due later. You have the option of making payments on your vacation or paying the balance all at once when it's due. If you book within that 30 day window, payment in full is due at time of booking.