Per USDA FoodKeeper
On the counterCounter
Refrigerate
once opened
In the fridgeFridge
3–4 months
at or below 40°F (4°C)
In the freezerFreezer
Not listed
no FoodKeeper figure
On the counterCounter
Not recommended
keep it cold
In the fridgeFridge
12 months
at or below 40°F (4°C)
In the freezerFreezer
Not listed
no FoodKeeper figure
Quick answer
Yes. Natural peanut butter lasts 3–4 months in the fridge. After that, or sooner if stored badly, it spoils: watch for the signs below.
How to tell if natural peanut butter is bad
Smell
Rancid: like crayons, paint or old nuts.
Taste
Bitter or soapy aftertaste.
Texture
Sticky or gummy residue around the lid.
Colour
Darkened or cloudy where it should be clear.
Natural peanut butter past the expiration date
Unopened
FoodKeeper gives unopened natural peanut butter 12 months in the fridge, 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 3–4 months in the fridge from the day you open it.
How to keep natural peanut butter fresh longer
- Or package use-by date, whichever comes first.
- Keep in a cool, dark place, tightly closed, away from heat.
- Refrigerating nuts, seeds and nut oils extends shelf life significantly.
More about natural peanut butter
FAQ
How long does it take for natural peanut butter to go bad?
3–4 months in the fridge, per USDA FoodKeeper.
Can natural peanut butter expire?
FoodKeeper gives unopened natural peanut butter 12 months in the fridge, 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 natural peanut butter?
Usually an unpleasant taste rather than illness, but discard anything mouldy, rancid or smelling off.
How do you keep natural peanut butter from going bad?
Or package use-by date, whichever comes first.
Numbers on this page come from USDA FoodKeeper and FSIS guidance. Last verified November 2026. How we verify our data · Report a wrong number