After the PIF date, they charge depending on how many days out....I've never done that so not sure how stiff the penalties are.
Here are the cancellation rules under their website:
Days Prior to
Departure Date Cancellation Charge (Per Guest)
2,3,4 & 5 day cruises Up to 61 days
None (except Pack & Go, Early Saver* and Super Saver fares**)
60 to 46 days
Deposit
45 to 30 days
Deposit or 50% of Total Fare, whichever is greater
29 to 15 days
Deposit or 75% of Total Fare, whichever is greater
14 days or less
100% of Total Fare
6-9 day cruises (excluding: Alaska, Europe, Transatlantic and
Panama Canal cruises) Up to 76 days
None (except Pack & Go, Early Saver* and Super Saver fares**)
75 to 56 days
Deposit
55 to 30 days
Deposit or 50% of Total Fare, whichever is greater
29 to 15 days Deposit or 75% of Total Fare, whichever is greater
14 days or less
100% of Total Fare
10 day or longer cruises, as well as all Alaska, Europe, Transatlantic and Panama Canal cruises Up to 91 days None (except Pack & Go, Early Saver* and Super Saver fares**)
90 to 56 days Deposit
55 to 30 days Deposit or 50% of Total Fare, whichever is greater
29 to 15 days
Deposit or 75% of Total Fare, whichever is greater
14 days or less 100% of Total Fare
All cruises purchased under the Pack & Go fare Any time after booking 100% of Total Fare