The Unique Entity Identifier (UEI) itself, issued through SAM.gov as part of your entity registration, does not expire. However, your SAM.gov registration, which includes your UEI, must be renewed annually to remain active. If your SAM.gov registration expires, your UEI will effectively become inactive in the context of being able to receive federal contracts or grants.
To check the status of your UEI/Registration, use the tool below by entering the corresponding Company Name, CAGE Code, or UEI. You will be able to access information like expiration date, address, points of contact, NAICS Codes, and PSC Codes.