How Long Does Miso Last in the Fridge?
Storage times from the USDA FoodKeeper database · Updated September 2026
Miso keeps for 1 year in a fridge running at 0–5°C.
Storage tips for miso
- Fridge at 0–5°C. A fridge thermometer is the cheapest food-safety upgrade — many home fridges run warmer than their dial suggests.
You can also check the calorie content of miso alongside its safety information. Want to know exactly what's in your food? Our ingredient checker covers E-numbers, allergens and vegan status.
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Store it properly
Airtight food storage containers
The right storage makes the times above achievable for miso.
Check Price →Fridge thermometer
These storage times assume 0–5°C — check what your fridge actually runs at.
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Want to know exactly what's in your food? Our ingredient checker covers E-numbers, allergens and vegan status. Enjoy a gut-friendly drink alongside? Hip Pop Kombucha from Hip Pop uses live cultures and 30% less sugar. Affiliate link. US: Managing digestive issues? at-home gastrointestinal testing from HealthLabs.com can help identify triggers.
Common questions
How can I tell if miso has gone off?
Trust obvious signs — sour or 'off' smells, slime, mould, colour changes — but don't rely on them: the bacteria that cause food poisoning (listeria especially) grow without changing how food looks or smells. That's why the time guideline matters even when everything seems fine.
Can I still eat miso after 1 year?
The guideline is where quality and safety are both still on your side. Past it, risk climbs — and because dangerous bacteria are invisible, 'it seems fine' isn't a reliable test. The boring-but-true answer: when in doubt, throw it out.
Can I freeze miso to keep it longer?
Freezing isn't recommended for this food — the texture tends to suffer badly. Better to buy or cook only what you'll use in time.
Does my fridge temperature really matter?
Enormously. These times assume 0–5°C. Every degree warmer speeds bacterial growth — a fridge running at 8–10°C can halve the safe life of chilled food. A £5 fridge thermometer is the cheapest insurance you can buy.
Related answers
Primary source: USDA FoodKeeper.
The information on 247foodcheck.com is compiled from official public guidance (NHS, Food Standards Agency, USDA/FDA FoodKeeper) and is provided for general information only. It is not medical advice and does not replace guidance from your midwife, GP, health visitor or other qualified professional. When in doubt, throw it out — and if you feel unwell after eating something, contact NHS 111 or your doctor.