Quick answer
A can of soup past its best-by date is not automatically unsafe. Check its condition, storage history and label. Once opened, USDA’s general guideline for low-acid canned foods, including soups, is 3–4 refrigerated days at 40°F (4°C) or below. Follow a shorter product instruction.
This guide covers commercially canned, shelf-stable condensed and ready-to-serve soup in metal cans. Home-canned soup, refrigerated fresh soup and carton stock have different requirements.
The storage decision
| What you have | What to do |
|---|---|
| Unopened sound can | Cool, dry storage; follow its label and quality date. |
| Opened low-acid canned soup | Refrigerate promptly; generally use within 3–4 days. |
| Heated soup saved for later | Chill promptly; do not restart an already-running opening clock. |
| Bulging, leaking or badly damaged can | Discard without tasting. |
How long can an unopened can keep?
USDA gives general best-quality pantry ranges of 2–5 years for low-acid canned foods and 12–18 months for high-acid foods, including tomatoes and fruit. Those are not extra years to add to a printed date or a guarantee about an individual can. Do not classify every mixed soup merely because tomatoes appear in its recipe.
Campbell’s US guidance recommends using unopened products before their Best Used By date for the best flavor, texture and quality, with cool, dry storage where temperatures rarely exceed 70°F. A cupboard away from cooking heat is preferable to a hot garage.
Save the full code if a date is unclear and ask the maker. A manufacturing code is not necessarily an expiration date. Do not use a code decoder intended for another product or market.
After opening
Put unused soup in a covered food container and label it with the opening date. Count from opening, not from the day you eventually heat it. Condensed soup still needs refrigeration before water or milk is added.
USDA allows 5–7 refrigerated days for high-acid canned foods, but that does not mean every tomato-containing mixed soup qualifies. If the category is unclear, plan to use opened soup within 3–4 days rather than stretching it to a week. Follow shorter manufacturer instructions.
Refrigerating food in its opened can is generally safe under USDA guidance, although glass or plastic preserves flavor better. Moving the soup does not renew its storage allowance.
Chill before the counter becomes a problem
Refrigerate within two hours, or one hour above 90°F (32°C). Divide a large amount into shallow containers; it need not cool completely on the counter. Discard soup left out overnight.
For safely stored leftovers, bring soup to a boil and check that it reaches 165°F (74°C). Stir during microwave reheating. Heat is not a way to rescue soup already stored unsafely.
FAQs
Can I freeze leftover soup?
Freeze a safely handled portion promptly within its refrigerated limit. FoodSafety.gov lists 2–3 months for the quality of prepared vegetable or meat soups, with continuous storage at 0°F (−18°C) or below.
Does a normal smell prove an old can is safe?
No. Reject bulging, leaking, deeply dented or heavily rusted cans and suspicious contents. Never taste questionable canned food.
Is a best-by date a safety deadline?
In US guidance it concerns quality. It cannot override damage, poor storage, a recall or an applicable stricter instruction.
Sources
Sources and draft evidence reviewed October 31, 2026. Manufacturer advice applies to the named product; follow stricter local guidance and your package. How we research our guides.