Pick pinto bean pods from the plants once they are brittle and dry and once the bean seeds inside are fully formed and hard.
Split the pods open and shake out the beans. Dispose of any shriveled or broken beans.
Spread the pinto beans out on a sheet of newspaper in a dry, well-ventilated room. Leave the beans to dry for an additional seven days.
Place the dried pinto beans into an airtight container. Seal it closed and label it with the bean variety and year preserved.
Store in a dark, cool pantry until you are ready to use the beans. Pinto beans retain all their flavor and nutrients for a year or longer, and can be stored for as long as 30 years with only a minimal loss of quality.