Let’s face it, essential oils are not cheap! They require a lot of plant material to produce a small amount of oil, and you want to get the most out of your little bottles of aromatic goodness. When stored correctly essential oils can last an extremely long time. Conservatively, you can keep properly stored oils for at least 1 year. I have oils in my collection that I have had around for over 5 years, and they still have a long life ahead of them.