If you are wondering what is a UEI number, it is essentially a 12-character alphanumeric code assigned by the System for Award Management (SAM.gov) that identifies your business across all federal awards in the U.S. government. If you want to bid on government contracts, apply for federal grants, or receive any form of federal funding, your Unique Entity ID is where that process begins.
Here is where most business owners get tripped up: having a UEI does not mean you are registered to do business with the federal government. Those are two different things, and confusing them is one of the most common and costly mistakes companies make when entering the federal marketplace.
Think of your UEI as your federal ID number. It tells the government who you are, but active SAM registration is what tells the government you are open for business. You need both, and understanding the difference between them could save you from submitting a proposal that goes nowhere or missing a deadline because you assumed you were already in the system.
In this guide, we will break down exactly what a UEI is, why it replaced the old DUNS number, how to get one, and what it does and does not allow you to do in federal contracting.
Key Takeaways
- UEI vs. Registration: A Unique Entity ID (UEI) is a 12-character identifier that acts as your federal business ID, but having one does not mean your entity is registered to do business with the federal government.
- Transition from DUNS: As of April 2022, the government replaced the third-party DUNS number with the UEI, which is now managed entirely within SAM.gov.
- Purpose of the ID: The UEI is a permanent identifier used to track federal awards and reporting, while active SAM registration is the mandatory step for bidding on contracts or applying for federal grants.
- Avoid Duplication: Always search SAM.gov before starting a new application; creating duplicate records can lead to significant administrative delays and complications.
What a UEI Number Really Is
To clarify, a UEI number is a government-issued identifier for an entity. This Unique Entity ID is 12 characters long, uses letters and numbers, and is generated inside SAM.gov.
That matters because this Unique Entity ID is not a private vendor number. It does not come from Dun & Bradstreet or another outside company. Once assigned, it becomes a permanent part of your entity record and helps federal systems accurately match your organization to contracts, grants, and reporting records.
In everyday terms, a UEI is your federal business ID. It acts as a unique identifier that stays with the entity, not with the individual employee or consultant who set up the record.
Who Gets a UEI
A wide range of groups may need a UEI. That includes corporations, LLCs, nonprofits, schools, tribal entities, local governments, and sole proprietors. To establish this record, you must provide your official legal business name and your physical address to ensure the government can properly validate your organization.
Small businesses often assume this only applies to large contractors. It does not. If you plan to work in the federal space, apply for a grant, or report as a sub-awardee, you may need one.
Where Your UEI Shows Up in Federal Systems
Your UEI appears in your SAM.gov entity profile, which includes your business name and other core registration details. Agencies use this number across connected federal systems, including those tied to awards, contractor performance, integrity records, and sub-award reporting, such as FPDS, FAPIIS, FSRS, and CPARS.
Because of that, the number follows your entity record wherever the government needs to identify it. While the person who created the login can change, the UEI stays tied to the organization regardless of any updates to your entity status.
Why the Federal Government Replaced DUNS with UEI
For more than 20 years, federal systems relied on the DUNS number, a 9-digit identifier issued by Dun & Bradstreet. The government decided to replace the DUNS number with its own system so that entity data could be managed entirely within SAM.gov. Led by the GSA, this transition officially took effect in April 2022. You can see how this change affects compliance in E-Verify’s notice about the Unique Entity ID requirement, which confirms that the DUNS number is no longer required for federal contractor identification.
This quick comparison helps:
| Identifier | Issued by | Format | Where you got it |
|---|---|---|---|
| DUNS | Dun & Bradstreet | 9 digits | Outside SAM.gov |
| UEI | U.S. government through SAM.gov | 12 letters and numbers | In SAM.gov |
The practical result is simple. Your identifier now comes directly from the GSA via the same federal system that stores your registration.
What Changed for Businesses After the Switch
Businesses no longer need to obtain a third-party identifier before starting their registration. That extra handoff is entirely gone.
Now the Unique Entity ID and the registration process live in the same place. The process is also free. For many organizations, using SAM.gov for the entire workflow means less confusion, fewer delays, and fewer chances to create mismatched records.
How to Get a UEI Through SAM.gov
There are two paths, and picking the right one matters. The official SAM.gov entity registration page is where both paths begin, and you never need to buy a UEI.
Getting a UEI Without Full SAM Registration
Some organizations only need an identifier. That usually applies to sub-awardees or entities that handle federal reporting, not to prime contractors bidding directly for awards.
The registration process for a simple identifier is short:
- Sign in with Login.gov, the primary portal, or create an account.
- Choose the option to get a Unique Entity ID.
- Enter the required entity details and submit.
You will receive a UEI, but that does not make your entity active for prime federal contracting or direct grant applications.
A UEI-only record gives you identification in federal systems, but it does not make you an active vendor in SAM.
Getting a UEI as Part of Full SAM Registration
If you want to bid on federal contracts, apply for federal grants directly, or get listed as an active entity, you need full entity registration within the System for Award Management. In that process, the UEI is assigned automatically as part of the entity record.
This is the point where many people get tripped up. The UEI is attached to the registration, but it is not the same as the registration itself. During the registration process, you must complete IRS verification using your tax identification number. Once your entity is validated, it will receive a CAGE code based on its physical address, which is required to do business with the government.
Active SAM entity status is the key to awards. SAM registration can take days to activate, and some records take longer if details do not match. After approval, you must perform an annual renewal to maintain your active status. The UEI itself does not expire. If you encounter any technical issues, the Federal Service Desk is available to assist. If you would rather not handle the paperwork alone, SAM registration services like Federal Filing can help keep the process on track.
What a UEI Can and Cannot Do for Your Business
A Unique Entity Identifier helps federal systems recognize your business entity. It supports identification, record matching, and various reporting functions. For example, a sub-awardee or an organization receiving federal financial assistance may need a UEI even if it never submits a prime contract offer.
What the UEI cannot do on its own is equally important. It does not make you eligible to compete for federal contracts as a prime contractor, nor does it replace the requirement for entity validation, certifications, or an active SAM registration record.
Why Active SAM Registration Still Matters
An active registration indicates to agencies that your business is current, verified, and available for award processing. Contracting officers use that status when reviewing offers and vendor records for federal contractors.
If you have a UEI but your SAM registration is inactive, the government can still identify your business, but it will not treat you as a company with an active registration. That difference can block bids, delay payments, or stop a direct award. Maintaining a fully compliant profile remains the most critical step for any business looking to secure government work.
How to Find Your UEI and Avoid Duplicate Records
If your entity already has a SAM.gov record, the Entity Administrator should sign in and navigate to the Entity Workspace. Your Unique Entity ID should appear clearly within the entity registration details.
Before you begin a new registration, it is vital to check whether a record already exists for your organization. You can use the public entity search in SAM.gov to look up your business name or legal business name to verify your status. While some organizations choose to limit their public visibility, checking the database first is the best way to prevent duplicate records, which can slow down validation, create conflicting data, and turn a simple update into a much longer process.
What to Do If You Registered Before the UEI Change
If your organization registered before April 4, 2022, you likely did not need to start over from scratch. SAM.gov transitioned older records to this new unique identifier automatically for existing entities.
The smartest move for any Entity Administrator is to check your current record first. If the UEI is already present, simply update the necessary information for your legal business name and avoid the common mistake of creating a second entity profile, which can lead to administrative complications later on.
The Key Difference to Remember
Your Unique Entity ID serves as your permanent government identifier, while your active registration indicates that your business has authorized status within the federal system.
Although this distinction may seem minor, it dictates how you interact with federal opportunities. A Unique Entity ID allows the government to recognize and track your organization, but maintaining an active registration is a mandatory requirement if you intend to bid on government contracts or apply for federal grants. Before you invest time in pursuing federal work, always verify your status to ensure your business remains compliant and ready to participate.
Frequently Asked Questions About UEI Numbers
What is a UEI number or Unique Entity ID?
A Unique Entity ID is a 12-character alphanumeric identifier assigned directly through SAM.gov. Federal systems use this number to uniquely identify a business, nonprofit, school, or other organization across all government award and reporting records.
Why did UEI replace the DUNS number?
The federal government transitioned to the UEI because it moved away from relying on a third-party identifier. By bringing the ID assignment process directly into SAM.gov, the government maintains full control over the system, meaning businesses no longer need to obtain a DUNS number from Dun & Bradstreet before beginning their registration.
How do you get a UEI for SAM.gov?
You can obtain a UEI through the SAM.gov portal. Depending on your specific needs, you may request a UEI-only record for reporting purposes, or you can receive your UEI automatically during the full SAM registration process required for federal contracts or grants.
Is a UEI required for government contracts?
Yes, the UEI is a mandatory part of the process, but the number alone is not sufficient. To bid on direct federal contracts, you generally need both your UEI and an active SAM registration, as detailed in the official FEMA overview of the Unique Entity Identifier and SAM process.
Does a UEI expire?
No, the UEI itself does not expire and remains associated with your entity. However, your SAM registration must be renewed annually. If your registration lapses, your entity will be marked as inactive in federal systems even though the UEI remains valid. If you encounter issues with your registration status or identification, you can contact the Federal Service Desk for further assistance.
