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How long does mustard (opened) last?
Last reviewed January 2025 · USDA FoodKeeper & FDA guidelines
After opening
12 months
1 year refrigerated — very stable
The short answer
Mustard (opened) lasts as long as you store it correctly — which can mean anywhere from a few days on the counter to a year in the freezer. The numbers above represent best quality per USDA and FDA guidelines, not absolute safety limits.
Why these numbers vary
Opened mustard. Storage life depends on temperature consistency, humidity, packaging, and how fresh it was when you got it. Refrigerators that swing between 38°F and 45°F shave days off these numbers; vacuum-sealing or freezing extends them.
How to tell if mustard (opened) is bad
- Dried out at top
- Off smell
- Mold around cap
Storage tips
- One of the longest-lasting condiments
- Refrigeration not strictly required but preserves flavor
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Frequently asked questions
How long does mustard (opened) last in the after opening?
Mustard (opened) lasts 12 months in the after opening. 1 year refrigerated — very stable
How can you tell if mustard (opened) is bad?
Watch for: Dried out at top; Off smell; Mold around cap.
Sources & review
Compiled by the BestByDates editorial team. Last reviewed: January 2025. Spotted an error? Let us know.