We do not put an expiration date on our flour because it all depends on how it is stored. Our flour will last a very long time if kept cool and dry. You can freeze it if you wish but most people don’t find it necessary. If you decide to freeze it, make sure you bring the flour to room temperature before using it. We do not suggest putting it in the refrigerator because it is very drying. We like using food safe five gallon pails with screw-on lids. You could also try Cambro containers that are thick plastic and come in many shapes and sizes all with secure lids. Above all, make sure it is kept cool and dry.