How long does yeast last?
Short answer: Yeast (packaged) keeps 4 months once opened in the fridge, 6 months in the freezer and 2 years in the pantry.
Storage chart
| Type | Pantry | Fridge | Freezer |
|---|---|---|---|
| packaged | 2 years | 4 months (after opening) | 6 months |
Fridge at 40°F (4°C) or colder, freezer at 0°F (−18°C). Freezer times are for best quality; food kept frozen stays safe indefinitely.
Storage tips
- Store in cool, dry place. Must be refrigerated or frozen once opened.
Keep it longer
Keep the fridge at 40°F (4°C) or colder and the freezer at 0°F (−18°C). Write the date on containers when you open or cook something.
Common questions
How long does yeast last in the fridge?
4 months once opened in the refrigerator at 40°F (4°C) or below, according to USDA FoodKeeper data.
Can you freeze yeast?
Yes. Frozen at 0°F (−18°C), yeast keeps best quality for 6 months. Frozen food stays safe indefinitely; the time is for taste and texture.
How long does yeast last at room temperature?
2 years in a cool, dry pantry.
How can I tell if yeast has gone bad?
Throw it out if you see mold, a slimy texture, an off smell or an odd color. For anything perishable, go by the storage time rather than smell: bacteria that cause food poisoning don't usually change how food looks or smells.
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Source: USDA FoodKeeper data (USDA Food Safety and Inspection Service). Updated 2026-10-13. General information, not medical advice. When in doubt, throw it out.