Most perfumes last between three and five years from their manufacture. Perfumes that have higher quality ingredients and come in opaque or dark bottles last closer to five years.
Dark or opaque bottles help perfumes last longer because the damage from incoming light is not a factor as it is with clear bottles. Bottles that are closed tightly undergo less evaporation than those with loose lids. Keeping perfume in the bathroom actually shortens its life span because of the humidity and heat present in that room. A dresser drawer provides the cool, dry environment that helps perfume last the longest.