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Condiments & Spreads
How long does mayonnaise last?
Egg-and-oil emulsion.
Quick answer
Pantry (room temp)
4 months
Unopened: 3–4 months past sell-by, pantry
After opening
2 months
2 months in fridge after opening
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Signs mayonnaise has gone bad
- •Yellowing color
- •Separation
- •Sour smell
- •Mold around lid
Storage tips
- ✓MUST refrigerate after opening — egg-based
- ✓Discard if left out >8 hours
- ✓Use clean utensils only
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Disclaimer: Times shown are USDA/FDA-recommended best quality periods, not absolute safety guarantees. Storage conditions, packaging, and food handling all affect actual shelf life. When in doubt, throw it out.