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: Refrigerate at 40°F (4°C) or below
Refrigerate after opening: Yes — refrigerate at 40°F (4°C) or below
Tip: USDA FoodKeeper lists 2 weeks from purchase unopened and about 1 week once opened; we show the practical 5–7 day range after opening, since the tub is opened partway through. Freezing works but turns it grainy — best for cooking only.
How to tell if Cottage cheese has gone bad
Sour or off smell
Watery or yellowing
Mold on the surface
Bitter taste
USDA FoodKeeper publishes no spoilage note for Cottage cheese specifically, so these are the general signs for dairy & eggs — 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 5–7 days refrigerated at 40°F (4°C) or below, according to USDA FoodKeeper. Refrigerate it once it's open.
Does Cottage cheese need to be refrigerated after opening?
Yes — keep Cottage cheese at 40°F (4°C) or below once it's open. Refrigerate at 40°F (4°C) or below.
How can you tell if Cottage cheese is bad?
Look for: Sour or off smell; Watery or yellowing; Mold on the surface; Bitter taste. Those are the general signs for dairy & eggs — USDA FoodKeeper publishes no spoilage note for Cottage cheese specifically. Never taste something to test it — when in doubt, throw it out.