Only situations with a published figure are listed. A blank isn't “forever” — it means no reliable number is published for it.
Storage
Store at: Shelf-stable; refrigerate after opening for best flavor
Refrigerate after opening: Optional — mainly for quality, not safety
Tip: Very high salt content makes soy sauce extremely slow to spoil — the limiter is flavor quality, not safety. USDA FoodKeeper is conservative here and lists 1 month refrigerated after opening for best quality; manufacturers commonly say a month at room temperature or up to a year or two refrigerated before flavor fades.
USDA FoodKeeper + manufacturer guidance tip (pantry storage): Refrigeration ensures that commercial sauces and condiments stay fresh for a longer period of time.
USDA FoodKeeper + manufacturer guidance tip (pantry storage): Shelf-stable commercial soy sauce and teriyaki sauce are safe when stored at room temperature after opening.
USDA FoodKeeper + manufacturer guidance tip (pantry storage): Quality, not safety, is the reason the labels on these products suggest that they be refrigerated after opening.
How to tell if Soy sauce has gone bad
Off or musty smell
Cloudiness or sediment beyond normal
Mold (rare)
Flat, harsh flavor
USDA FoodKeeper + manufacturer guidance publishes no spoilage note for Soy sauce specifically, so these are the general signs for condiments & sauces — never taste something to test it. When in doubt, throw it out.
Air and warmth are what shorten an opened item's life — the right container buys back the days the packaging gives up once the seal's broken.
About 1–2 years refrigerated at 40°F (4°C) or below, according to USDA FoodKeeper + manufacturer guidance.
Does Soy sauce need to be refrigerated after opening?
Soy sauce is shelf-stable at room temperature: shelf-stable; refrigerate after opening for best flavor. Refrigerating it mainly preserves quality rather than safety.
How can you tell if Soy sauce is bad?
Look for: Off or musty smell; Cloudiness or sediment beyond normal; Mold (rare); Flat, harsh flavor. Those are the general signs for condiments & sauces — USDA FoodKeeper + manufacturer guidance publishes no spoilage note for Soy sauce specifically. Never taste something to test it — when in doubt, throw it out.