You probably won't need much actual cash while onboard, as many cruise lines will just charge purchases to your account. Even ship casinos these days have cashless credit systems. On nearly all cruises, passengers are given an itemized bill at the end of the trip listing all charged expenses.

The term "Cruise Cash" is a specific "high-fidelity" product offered by Carnival Cruise Line, which allows guests (or their friends/family) to purchase an upfront credit for their "Sail & Sign" onboard account. While you do not need to buy "Cruise Cash" to enjoy your vacation, it can be a useful tool for pre-budgeting. You can buy it in denominations like $25, $50, or $100, and it is instantly applied to your account to cover things like gratuities, drinks, or shore excursions. A critical "high-fidelity" caveat is that Cruise Cash is non-refundable and non-transferable; if you don't spend it by the end of your cruise, you lose the balance. For most 2026 travelers, simply linking a standard credit card to your onboard account is more flexible and convenient. However, Cruise Cash remains a popular "gift" option for birthdays or honeymoons, allowing loved ones to "treat" the passengers to a specific experience—like a spa day or a round of drinks—without needing to be physically present on the ship.