How long does genuine maple syrup last?
Short answer: Genuine maple syrup (unopened, glass) keeps indefinitely in the fridge and 4 years in the pantry.
Storage chart
| Type | Pantry | Fridge |
|---|---|---|
| unopened, glass | 4 years | Indefinitely |
| unopened, plastic | 2 years | 18–24 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.
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 genuine maple syrup last in the fridge?
Indefinitely in the refrigerator at 40°F (4°C) or below, according to USDA FoodKeeper data.
How long does genuine maple syrup last at room temperature?
4 years in a cool, dry pantry.
How can I tell if genuine maple syrup 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.
More shelf stable foods
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.