Sauces
Ketchup
US guidanceWondering how long your ketchup really lasts after opening? Don't toss it prematurely! We break down the exact UK and US safety guidelines so you know when it's safe to use.
Best quick answer
60 days
If opened today
Aim to use by 9 Sept 2026
What that means
This keeps longer, but cold storage and clean handling still matter.
Use this as a planning window, then check the real-world spoilage signs below before eating.
Make Ketchup last the full window
Do
- Refrigerate promptly after each use, at 5°C / 40°F or below.
- Use a clean utensil every time you take a portion.
- Keep it sealed — the original lid or an airtight container.
- Freeze it before the window closes if you will not finish it — Pour into an airtight container or freezer bag and freeze flat for up to three months.
Don't
- Leave it out on the counter while cooking or serving.
- Double-dip or return unused portions to the container.
- Store it in the fridge door if you open the fridge often — it is the warmest spot.
- Taste it to "test" safety. If in doubt, throw it out.
How Ketchup compares with other sauces
Opened storage windows vary a lot within a category. Days shown are after opening, refrigerated.
| Food | UK days | US days | Freezable |
|---|---|---|---|
| Ketchup | 45 | 60 | Yes |
| Pasta Sauce (Tomato-based) | 5 | 5 | Yes |
| Pesto Alla Genovese | 5 | 7 | Yes |
| Pesto Rosso | 7 | 7 | Yes |
| Mayonnaise Original Recipe | 14 | 21 | Yes |
| Ketchup Star | 21 | 30 | Yes |
| Tomate | 7 | 7 | Yes |
Where this guidance comes from
The Ketchup window blends official US food-safety guidance with typical manufacturer opened-storage instructions. The label on your specific product always wins if it is stricter.
Storage note
Both regions consider ketchup highly stable, but US guidelines often allow for a slightly longer window due to its acidic nature.
Check before eating
Look
Mold growth or visible separation of ingredients may indicate spoilage.
Smell
A sour, yeasty, or distinctly off-odor suggests bacterial growth.
Texture
If the sauce becomes unusually slimy or separates into distinct layers, it should be discarded.
Freezing
Yes. Pour into an airtight container or freezer bag and freeze flat for up to three months.
UK vs US
UK mode uses 45 days after opening. US mode uses 60 days after opening.
US mode is 15 days longer than UK mode on this item.
FDA/USDA Guidelines is selected right now.
Source: US FDA/USDA Guidelines & Manufacturer Expectations
Trust and method
TossOrKeep editorial desk
TossOrKeep food storage policy review · Reviewed 11 Jul 2026
Windows are conservative planning ranges built from public UK FSA and US FDA/USDA guidance, then tightened when typical manufacturer labels run shorter.
Cold storage, clean utensils, and label-first handling win over memory or social-media myths.
This page is specific to Ketchup. Similar foods in Sauces can still differ.
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See the bundleFrequently Asked Questions
How long does Ketchup last after opening?
When stored correctly according to guidelines, it generally lasts around 60 days. Always rely on your senses if it looks or smells off.
How can I tell if Ketchup has gone bad?
The best way is to check its appearance and smell. Mold growth or visible separation of ingredients may indicate spoilage. A sour, yeasty, or distinctly off-odor suggests bacterial growth.
Can you freeze Ketchup?
Yes, you can. Pour into an airtight container or freezer bag and freeze flat for up to three months.
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Did you know?
Keep your fridge at 5°C or below (UK FSA advice) — a couple of degrees too warm meaningfully shortens how long opened food stays good.
Based on UK FSA / US FDA storage guidance.
Cut waste further
People checking Ketchup usually need better storage, clearer labels, or a more visible fridge setup.
Freezer-safe containers
Useful when the countdown is short and freezing is a good save option.
Date labels
Make the opened date visible so the fridge tracker matches the real container.
Fridge thermometer
Useful for longer-life items where stable cold storage matters.
These links open Amazon UK searches for relevant storage tools. They are suggestions, not sponsorships.