Canned soup rarely carries a "use by" label or expiration date. Instead, many canned soups contain a "best by" label. This is an indication of quality rather than safety, as most canned goods can last several years beyond this time frame with no safety concerns.
As of 2014, most manufacturers of canned soup print a date two years from manufacturing for the "best by" label on soup cans. This date signifies the time frame that the foods maintain their nutritional value and quality. Canned foods should always be stored at 75 degrees Fahrenheit, and if any bulging or off-odors appear, the canned goods should be discarded without tasting.