How long does cheese last?
In the fridge, cheese keeps for 6 months from the package date. Once opened, use it within 3 to 4 weeks. All 5 kinds are below.
No guideline
6 months
from the package date
3 to 4 weeks
in the fridge unless noted
By kind
| Kind | Pantry | Fridge | After opening | Freezer |
|---|---|---|---|---|
| hard such as cheddar, swiss, block parmesan | no guideline | 6 months | 3 to 4 weeks | 6 months |
| parmesan; shredded or grated | no guideline | 12 months | no guideline | Not recommended |
| shredded; cheddar, mozzarella, etc. | no guideline | 1 month | no guideline | 3 to 4 months |
| processed slices | no guideline | 3 to 4 weeks | no guideline | Not recommended |
| soft such as brie, bel paese, goat | no guideline | 1 to 2 weeks | no guideline | 6 months |
No guideline: USDA gives no time for that place, usually because the food is not stored that way.
Does cheese go bad?
Yes. The fridge time above is the window USDA gives for good quality; after it, cheese may still be safe for a short while but quality drops and spoilage signs start. The date on the package is the maker's quality promise; the times here count from purchase unless marked "from the package date".
Two numbers to keep in mind: a fridge at 40 F (4 C) or below, and no more than 2 hours at room temperature (1 hour above 90 F / 32 C) for anything perishable.
How to tell cheese has gone bad
- Hard cheese such as cheddar, Swiss or block parmesan: cut at least 1 inch (2.5 cm) around and below the mould spot, keep the knife out of the mould, and re-cover the cheese in fresh wrap. The rest is fine to eat.
- Soft cheese such as brie, goat cheese or cream cheese: any mould means the whole piece goes out, because mould spreads below the surface of moist foods.
- Shredded, crumbled or sliced cheese of any type with mould goes out too. Spores travel through the pack.
- Cheeses made with mould, such as blue, Gorgonzola and Roquefort, are fine as sold. Mould that is not part of the cheese follows the same rule: trim hard cheese, discard soft cheese.
Sources: Molds on Food: Are They Dangerous? (USDA FSIS). The times on this page are quality guidelines, not safety limits; food that shows these signs goes out regardless of the date.
How long do other dairy products & eggs last?
Source: USDA FSIS FoodKeeper dataset (public domain). How we decode the data.