Shelf Stable Foods
How long does tomato paste last after opening?
Opened tomato paste gets 5 days in the fridge — freeze the rest in tablespoon blobs, where USDA allows 2–3 months, instead of growing an experiment in the can.
How long does it keep?
| Pantry, from purchase | 27 months |
|---|---|
| Fridge, opened | 5 days |
| Freezer | 2–3 months |
Can it sit out?
Unopened, tomato paste is shelf-stable. Once opened, treat it as perishable — the FSIS 2-hour rule applies.
Perishable food left at room temperature for more than 2 hours should be thrown out — 1 hour if it’s 90°F or hotter (a picnic, a hot car, a summer kitchen).
How to tell if tomato paste has gone bad
- Mold spots — white, blue, or black — anywhere on the surface
- A sour, fermented smell over the sweet cooked-tomato one
- A bulging or leaking can before you’ve even opened it
- Paste blackened well below the top layer, not just skinned over
When in doubt, throw it out.
Scrape the leftovers out of the cut can and into a small tub — paste left sitting on bare metal picks up a tinny edge quickly.
Quick answers
How long does tomato paste last after opening?
Opened tomato paste gets 5 days in the fridge — freeze the rest in tablespoon blobs, where USDA allows 2–3 months, instead of growing an experiment in the can.
Can you freeze tomato paste?
USDA’s freezer window for tomato paste is 2–3 months.
How long can tomato paste sit out?
Sitting out isn’t the safety question for unopened tomato paste — once opened, the FSIS 2-hour rule applies. Perishable food left at room temperature for more than 2 hours should be thrown out — 1 hour if it’s 90°F or hotter (a picnic, a hot car, a summer kitchen).