Homebrew keeps well for about a year, and its flavor often continues evolving. The flavor tends to keep improving for a month or two after bottling, stays steady for several months, and then starts to deteriorate and turn stale after about 12 months.
5:098:22How to tell if your Homebrew is infected? - YouTubeYouTubeStart of suggested clipEnd of suggested clipYou. If your beer just might taste bad if it is bad or rancid dump it at that point or in some casesMoreYou. If your beer just might taste bad if it is bad or rancid dump it at that point or in some cases infections. Can result in some pretty good tasting beer.
Even contaminated homebrewed beer can't make you sick, he said. "There are no known pathogens that can survive in beer because of the alcohol and low pH," Glass said. "So you can't really get photogenically sick from drinking bad homebrew. It could taste bad, but it's not going to hurt you."