your port charges and taxes depend on how long the cruise is and what ports your cruise stops at.
for instance, I'm on a 7-day cruise to the southern caribbean.
FEDERAL TAXES/FEES $ 80.25
The port fees are included in this. Each port charges the cruise line different prices.
my ports of call are:
HALF MOON CAY, BAHAMAS, ST. THOMAS, USVI, SAN JUAN, PUERTO RICO, GRAND TURK
It's very much worth paying that small amount as compared to full fare price per person.