How Long Do Pickled Onions Last In The Fridge? (Full Analysis)

If you’re stocking up on pickled onions, it’s important to know how long you can keep them in your fridge or pantry until they go bad. This is especially true if you’re making this yourself.

Otherwise, you could end up losing a ton of pickled onions to spoilage. More than that, you could accidentally consume spoiled pickled onions without knowing it, or worse—feed them to other people by mistake!

So, the question is: how long do pickled onions last, exactly? Can it go bad?

Short Answer:

Pickled onions can last a very long time with proper storage. Nevertheless, they will still go bad eventually.

Sit back as we concisely uncover:

Are you ready to find the answer!

Let’s get started!

How Long Do Pickled Onions Last? Can It Go Bad?

The shelf life of pickled onions largely depends on how they were prepared.

So, in general:

Storage ConditionHomemade Pickled OnionsStore-Bought Pickled Onions
Opened, in the fridge2 to 4 weeks2 to 3 months
Unopened, homemade, vacuum-sealed, in the pantry2 yearsNot Applicable
Unopened, store-bought, in the pantryNot Applicable2 years
  • Pickled onions that have been prepared quickly and kept in a jar last around 2 to 4 weeks in the fridge.
  • Vacuum-sealed pickled onions can last up to 2 years at room temperature. However, the shelf life of vacuum-sealed ones drops to about a month once you open them.

How long pickled onions last also depends on whether they are homemade or not.

  • Homemade pickled onions last for about 2 to 3 weeks in the fridge once opened, while store-bought ones can last up to 2 to 3 months in the same conditions (because they contain more preservatives.)

How To Store Pickled Onions?

Pickled onions last longer when kept in the right conditions.


Homemade pickled onions that don’t go through typical preservation methods (etc. boiling the jars, vacuum-sealing) last the longest in the refrigerator since they are more prone to bacterial growth.

Keep your homemade ones in an airtight jar to maintain their freshness for as long as possible.

To prevent bacterial growth, always make sure to use a clean utensil to take them out of the jar.

If you want your homemade pickles to last longer, consider vacuum-sealing your jars. When done right, the vacuum sealing process can extend your pickles’ shelf life to 2 years (in the pantry).


For store-bought pickled onions, the best way to store them is to place them in a cool, dry place like the pantry. Once they are opened, keep them in the fridge at all times to extend their freshness. (*)

Pro tips:

Another great way to extend the shelf life of the pickes are by freezing them. You can do this for both homemade and store-bought pickled onions.

Frozen pickled onions can last up to 6 to 12 months. Once thawed, they should be eaten within 2 to 3 weeks.

How To Know If Your Pickled Onions Are Bad?

There are several tell-tale signs that can tell you that it’s time to throw your pickles out.

To avoid accidentally eating bad pickles, here are the things that you should look out for:

1. Pungent Smell

Fermentation is common for pickled vegetables, but there is a clear difference between the normal sour smell of pickled vegetables vs. the foul smell of bacteria.

So, when the smell of your pickles go from a sharp vinegary sourness to something rancid, it is a sign that harmful bacteria are present. (*) As soon as you smell something off in your pickles, throw them out as soon as possible.

2. Mold

Mold on any type of food is never a good thing. It is especially dangerous for pickes, which are eaten as they are (without cooking).

That said, throw out the entire jar once you see even the smallest bit of mold in your pickled onions.

3. Change in Taste

If you don’t see any discoloration or smell a foul odor from your pickles, then chances are, they are still good to eat. However, if you detect a strange taste, it’s probably a sign of spoilage.

Spoiled pickled onions can taste bitter or bland. So, if you take a bite and either taste bitterness or nothing at all, it’s time to throw the entire jar into the trash.



As you can see, the shelf life of pickled onions varies depending on how it is made and stored. In general, opened pickled onions last around 2 to 3 weeks in the fridge (longer if they are store-bought), while unopened pickled onions can stay stable for as long as 2 years at room temperature.

Knowing how long your pickled onions are safe to eat is crucial for food safety. The same goes for recognizing the signs of spoilage.

After all, pickled onions should make your meal even tastier—not give you a bad stomachache!

If you want to learn more about food, cooking, and food safety, be sure to check out the rest of our blog.

image of pickled onions

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