How long does mayonnaise last after its expiration date?

Unopened mayonnaise:

* Refrigerated: unopened mayonnaise can typically be stored for 2-3 months past the expiration date. Make sure the jar remains sealed and refrigerated at all times.

* Unrefrigerated: mayonnaise should not be stored unrefrigerated for more than 8 hours.

Opened mayonnaise:

* Refrigerated: opened mayonnaise can typically be stored for 1-2 months past the expiration date. Make sure to keep the jar tightly sealed and refrigerated at all times.

* Unrefrigerated: opened mayonnaise should not be stored unrefrigerated for more than 2 hours.

Homemade mayonnaise:

* Refrigerated: homemade mayonnaise should be stored in an airtight container and refrigerated at all times. It will typically last for up to 2 weeks.

Spoiled mayonnaise:

Spoiled mayonnaise will typically have an off odor or taste, and may be discolored or have a slimy texture. If you are unsure whether mayonnaise is still good, it is best to discard it.