The one remaining test we have has an official expiration of Nov. 5, 2021. However, we received a note in the shipment saying the expiration had been extended three months and would be good until February. We ordered the tests at the end of November, so we only had about two months to actually use them once they arrived. When we placed the order, there was a message on the site saying the expiration could be pretty soon. That message is no longer showing up, so hopefully they will be good for a while after you get them.