It was announced today in the 73rd volume of the Bleach manga that the next volume will conclude the series. Kubo recently teased the finale, but fans speculated that it would still be at least a year out. We even joked about it on the recent Anime Insiders Podcast.
Bleach entered its final arc back in 2012. Based on the current chapter count, Bleach is scheduled to end in approximately five chapters.