Check out your contract with any cruiseline - it is clear they add taxes and surcharges even after you are paid in full. The only thing that is really protected is the cruise fare portion of the total cost.
Guarantee and Rate
Once we have received your deposit or full payment, the cruise rate is secure except in the event of substantial increases in operating costs, tariffs or taxes prior to the sailing date. In such cases, we reserve the right to add a surcharge. If you select an Air/Sea package, additional governmental taxes and customs fees may apply. All assessed government or quasi-government fees and taxes are subject to change without notice at any time, and we reserve the right to add a surcharge for these fees and taxes whether you have a confirmed booking under deposit or have made final payment. All rates and information in this brochure were in effect at time of printing and are subject to change.