User blog comment:J Fan/Pirates 5 - Sequel News Rundown (Revised)/@comment-2191897-20131105190226

@J Fan There is no exact date in which production starts, but Pirates of the Caribbean: Dead Men Tell No Tales is expected to start filming in Fall 2014 Pirates 5 is now expected to start filming in Fall 2014 .

From an article on variety.com from September 10th 2013:

"The fifth “Pirates” installment, which is directed by “Kon-Tiki” helmers Joachim Ronning and Espen Sandberg, is slated to begin production in the fall of 2014. Pic’s start date originally was set for the first quarter, though the studio needed more time in development."