Unfortunately, brown rice contains oil in its outside coating or germ, causing it to go rancid over a short period of time. The shelf life is around six months and can be extended with refrigeration. For those wanting the high fiber contained in brown rice, barley — which contains almost twice as much fiber as brown rice — can be stored.
Long grain rice stores for up to 30 years, if packaged for long-term storage and stored in a cool, dry place. This gives plenty of time to rotate the supply that is stored.