The Unique Entity Identifier (UEI) Replacing the DUNS Number: A Funding-Focused Guide

The Unique Entity Identifier (UEI) officially replaced the DUNS number as the U.S. government's primary way to identify businesses in the federal award system on April 4, 2022. If your company registers in SAM.gov to bid on federal contracts or receive federal grants, you are now assigned a free 12-character alphanumeric UEI issued directly by the government instead of a nine-digit DUNS number issued by Dun & Bradstreet. The practical takeaway for most business owners: the UEI is a federal identifier for doing business with the government — it is not a credit score, not a business credit file, and, on its own, not something a revenue-based lender or MCA funder checks when deciding whether to advance you working capital. Below we separate the compliance facts from the funding facts so you know exactly when this change matters to your cash flow and when it is simply paperwork.

What actually changed on April 4, 2022

For decades, any entity that wanted to do business with the federal government had to obtain a DUNS number — a nine-digit identifier assigned and managed by Dun & Bradstreet (D&B), a private company. The government paid D&B for the service, and businesses often had to request the number from D&B before they could even start a SAM.gov registration.

That arrangement ended. The General Services Administration (GSA) now generates a Unique Entity Identifier — a 12-character, non-sequential alphanumeric code — directly within SAM.gov, the System for Award Management. Key differences at a glance:

• Issuer: DUNS came from a private vendor (D&B). The UEI is issued by the U.S. government inside SAM.gov.
• Format: DUNS was 9 numeric digits. The UEI is 12 characters, letters and numbers, with no embedded meaning.
• Cost: The UEI is free, the same way basic SAM.gov registration is free.
• Process: You no longer request an identifier from a third party first — the UEI is assigned as part of validating your entity in SAM.gov.

If your business was already registered in SAM.gov before the switch, the system generated a UEI for you automatically and displayed it in your entity record. You did not need to re-apply.

Why the government made the switch

The move served a few practical goals. Consolidating identity management inside SAM.gov removed a private middleman from a mandatory government process, which the GSA framed as reducing burden and cost for entities that only needed an identifier to interact with federal agencies. It also put the full lifecycle — identifier assignment, entity validation, and registration — under one government-controlled system.

For business owners, the most useful mental model is this: the UEI exists to answer the question "is this the same legal entity the government thinks it is?" for the purposes of contracts, grants, and federal awards. It is an identity and compliance tool, not a financial-strength signal. That distinction is the whole reason this topic gets confused in the funding world, which we tackle next.

The part everyone gets wrong: UEI, DUNS, and business credit

Here is where owners routinely trip up. Because the old DUNS number came from Dun & Bradstreet — a business credit bureau — many people assumed "getting a DUNS number" was the same thing as "building business credit." It never fully was, and the UEI makes the split even cleaner.

• The UEI identifies you to the government for awards. It carries no payment history and no score.
• Your D&B business credit file (with a PAYDEX score) still exists separately at Dun & Bradstreet, and D&B still issues D-U-N-S numbers for its commercial credit products — just not as the government's award identifier anymore.
• Business credit files at Experian Business and Equifax Business are separate again from both of the above.

So the DUNS-to-UEI change did not erase anyone's business credit. It simply stopped using a private credit-bureau identifier as the government's ID. If a vendor or "credit builder" tells you the UEI is your new business credit score, that is a misunderstanding — or a sales pitch.

For deeper background on how the three commercial bureaus actually score a company, see our pillar guide on business credit scores explained.

Does a UEI (or DUNS) matter for getting working capital?

For the kind of funding most Main Street operators actually use — revenue-based financing and merchant cash advances — the honest answer is: usually not directly. These products are underwritten on cash flow, not on federal identifiers.

A revenue-based or MCA marketplace funder is primarily asking:

• How much consistent revenue moves through your business bank account each month?
• What do the last 3–6 months of bank statements show for deposits, average daily balance, and negative days?
• Is the account stable enough to support a set of scheduled remittances tied to sales?

Credit is a factor, but a secondary one — many programs work with FICO 500+ because the deposits carry the decision. A UEI or DUNS number simply is not part of that math. You do not need a SAM.gov registration to qualify for a merchant cash advance or a revenue-based advance.

Where these identifiers do matter is the government-adjacent lane: bidding on federal contracts, receiving federal grants, or applying for certain SBA and disaster programs that touch federal systems. If that is your world, keeping your SAM.gov record and UEI active and accurate is genuinely load-bearing — a lapsed registration can stall an award.

Decision framework: when the UEI is worth your time — and when it's a distraction

Use this to decide where to spend effort, because chasing federal identifiers when you actually need cash this month is a common and costly detour.

Works best when (prioritize your UEI / SAM.gov registration):

• You sell — or want to sell — products or services to federal agencies and need to bid on contracts.
• You are pursuing federal grants or cooperative agreements that require SAM.gov registration.
• You already hold or are renewing government awards and must keep your entity record active and validated.
• You are a subcontractor to a prime that requires you to be identifiable in federal systems.

Avoid the detour when (a UEI won't solve your problem):

• You need working capital in days to cover payroll, inventory, or a revenue-generating opportunity — a UEI does nothing here.
• Someone is selling you a UEI or DUNS number as a shortcut to "instant business credit" or "guaranteed funding." No identifier guarantees anything.
• You are a purely private-sector business (restaurant, contractor, retail, services) with no federal-contract ambitions — the UEI is optional and unrelated to your cash-flow financing.
• Your immediate constraint is revenue and deposits, not paperwork. Fix the funding path first; handle federal registration on its own timeline.

Example: two owners, two very different priorities

The figures below are illustrative — for example only — to show how the same UEI/DUNS change lands differently depending on the business model. They are not quotes or offers.

Notice the pattern: even for Owner A, who genuinely needs the UEI, the identifier keeps them eligible to compete — it does not fund the payroll gap. The deposits do. Owner B never touches a UEI at all and still has a clear, cash-flow-based path to capital.

How to find or confirm your UEI (and keep it clean)

If you need your UEI for a federal purpose, here is the practical checklist:

• Already registered? Log in to SAM.gov and open your entity record — your 12-character UEI is displayed there. Businesses registered before April 2022 were assigned one automatically.
• New entity? You can request a UEI in SAM.gov without completing a full registration if you only need the identifier — the system walks you through entity validation (confirming your legal name and address).
• Keep it active: SAM.gov registrations must be renewed annually. An expired registration can freeze awards even though the UEI itself does not change.
• Watch for validation snags: The most common delay is a mismatch between the legal name/address on file and what SAM.gov's validation service expects. Have formation documents ready.
• Never pay a third party for a UEI. It is free through SAM.gov. Paid "registration assistance" services are optional and not required.

Once your federal compliance is in order, treat your funding readiness as a separate track: keep clean, well-organized business bank statements, minimize negative days, and keep revenue flowing through one primary account. That is what a revenue-based funder reads — and it is entirely within your control regardless of any government identifier. For the bigger picture on preparing to borrow, see our complete business funding guide.