How long does ketchup last?
Unopened, it keeps in the cupboard for about 1 year. Once opened, in the fridge for about 6 months.
This refers to: Tomato ketchup in a bottle.

Shelf life of ketchup at a glance
| Storage | Unopened | Opened |
|---|---|---|
| Cupboard | 1 year | – |
| Fridge | – | 6 months |
Refrigerate after opening, where ketchup keeps about 6 months. Unrefrigerated, use it within a month.
Past its date does not mean spoiled
These are guide values for food stored correctly. A best-before date is not a throw-away date: many products are still fine after it. Check how it looks, smells and tastes. Mould, an unusual smell or a bulging can are reasons to throw it away. A use-by date is different: do not eat the food after it.