Per USDA FoodKeeper
On the counterCounter
Refrigerate
once opened
In the fridgeFridge
4 days
at or below 40°F (4°C)
In the freezerFreezer
Not listed
no FoodKeeper figure
On the counterCounter
18 months
cool, dry place
In the fridgeFridge
Not needed
shelf-stable
In the freezerFreezer
Not needed
keeps without freezing
Quick answer
Yes. Spaghetti sauce lasts 4 days in the fridge. After that, or sooner if stored badly, it spoils: watch for the signs below.
How to tell if spaghetti sauce is bad
Smell
Fermented, yeasty or sour beyond the product's usual tang.
Texture
Separation that does not stir back, or a slimy layer.
Colour
Darkening or a change in colour at the top of the jar.
Mould
Any fuzz on the surface or lid — discard the jar.
Spaghetti sauce past the expiration date
Unopened
FoodKeeper gives unopened spaghetti sauce 18 months in the pantry, counted from the day you buy it. "Best-by" and "sell-by" describe quality and stock rotation, not safety; only infant formula carries a federally required use-by date.
Opened
Once opened, the printed date no longer applies. Count 4 days in the fridge from the day you open it.
How to keep spaghetti sauce fresh longer
- Refrigerate after opening unless the label says otherwise.
- Use a clean utensil each time; crumbs and double-dipping shorten shelf life.
- Wipe the rim and close the lid tightly.
More about spaghetti sauce
FAQ
How long does it take for spaghetti sauce to go bad?
4 days in the fridge, per USDA FoodKeeper.
Can spaghetti sauce expire?
FoodKeeper gives unopened spaghetti sauce 18 months in the pantry, counted from the day you buy it. "Best-by" and "sell-by" describe quality and stock rotation, not safety; only infant formula carries a federally required use-by date.
What happens if you eat bad spaghetti sauce?
Usually an unpleasant taste rather than illness, but discard anything mouldy, rancid or smelling off.
How do you keep spaghetti sauce from going bad?
Refrigerate after opening unless the label says otherwise.
Numbers on this page come from USDA FoodKeeper and FSIS guidance. Last verified November 2026. How we verify our data · Report a wrong number