Princess Cruises will raise the gratuity for service staff from $11.50 to $12.95 per passenger, per day for voyages that depart on and after Jan. 1.

The increase would bring the suggested amount for two passengers on a seven-day cruise to $181.30.

The line said guests in mini-suite categories and above, who currently pay $12 per day, will contribute $13.95 per day.

The amounts are automatically added to a guest’s final shipboard bill, but can be adjusted upwards or downwards at the guest-services desk. Princess noted that gratuities will be deemed “undisputed” unless a request to modify is received prior to disembarking the ship.

Princess said, “This gratuity will be shared amongst those staff who help provide and support your cruise experience, including all waitstaff, stateroom stewards, buffet stewards and housekeeping staff across the fleet."

The suggested gratuity has been $11.50 since 2013.

Besides Princess, cruise lines that have increased or will increase their gratuity charge this year are Norwegian, Royal Caribbean and Holland America Line.