How Long Does Tomato Sauce (Canned) Last?

Opened canned tomato sauce's 5-7 day fridge window runs a bit longer than a plain broth's, and tomato's natural acidity is the likely reason — lower-pH environments slow bacterial growth somewhat compared to a neutral-pH liquid, similar in principle to why vinegar and other acidic products on this site tend to outlast neutral ones.

Mold, a notably darker or off color, and a sharp fermented smell distinct from tomato sauce's normal tangy aroma are the signs a can has passed its window — because tomato sauce already has a naturally strong, somewhat sour-adjacent smell even when fresh, it's worth paying closer attention to a sudden intensification of that smell rather than assuming any tang at all means it's spoiled.

Transferring an opened can's contents to a separate non-metal container rather than storing it in the can itself is a reasonable habit for the full 5-7 days, since the tomatoes' acidity can interact with a can's lining over several days in the fridge — a minor consideration for flavor and caution more than an urgent safety issue with modern can linings, but an easy habit to keep. A homemade tomato sauce, simmered from fresh tomatoes rather than opened from a can, generally follows a similar 5-7 day fridge window, though it's worth treating a homemade batch with slightly more caution than a commercially processed can, given the more standardized heat treatment a canned product goes through during processing.

See Tomato Sauce (Canned)'s full storage & shelf-life guide (with spoilage signs) →