How Long Does Granulated Sugar Last?

Sugar essentially doesn't expire in any meaningful safety sense — its low moisture content means there's nothing for bacteria or mold to grow on, so a sealed bag or container realistically stays safe to use indefinitely, well beyond any printed best-by date, which reflects quality rather than a real safety cutoff.

The one genuine change worth watching for is clumping from absorbed humidity, which is a texture inconvenience rather than a spoilage sign — sugar that's hardened into a solid block can be broken up with a knife or a few pulses in a food processor and used exactly as before. A few dried bread crusts or a specialty terra cotta disc dropped into the container can help draw out excess moisture and keep sugar looser for longer in a genuinely humid kitchen. Discoloration or an odd smell in granulated sugar is rare enough that it usually signals contamination from something stored nearby (a strong-smelling spice, for instance) rather than any change in the sugar itself, since sugar has essentially no flavor or aroma of its own to degrade. Bugs are a more realistic long-term storage concern than spoilage for sugar left in a paper bag for a long stretch, which is another reason this site recommends transferring it to a sealed container rather than leaving it in its original packaging indefinitely.

See Granulated Sugar's full storage & shelf-life guide (with spoilage signs) →