Quick answer: what is a DUNS number, and do I need one?

A D-U-N-S number is Dun & Bradstreet's own commercial identifier for a business. It is no longer the federal government's identifier: the General Services Administration announced that on April 4, 2022, SAM.gov and its other systems would switch to the Unique Entity ID, which is obtained at SAM.gov. A D-U-N-S number still matters for Dun & Bradstreet credit files, so a business that wants a D&B file will still meet it. It is not one of the SBA's five steps for building business credit. For a reader who has not yet formed the company, ZenBusiness covers the entity and EIN steps that come first in the SBA's sequence and offers a free accounting consultation to customers who form with it. It does not sell credit, monitoring or any credit-building service.

What is a D-U-N-S number?

It is an identifier that Dun & Bradstreet assigns to a business and uses to organize its credit files. Much of the content on this topic gets its status wrong, so the key distinction is who uses it. Dun & Bradstreet uses it commercially. The federal government stopped using it as its identifier.

Do I need a D-U-N-S number?

Not to follow the SBA's sequence. The SBA's five steps for building business credit do not include it. A reader needs one only if a specific party asks for it, or if the goal is a Dun & Bradstreet credit file.

Which lenders, vendors or programs ask for one varies, and the party making the request is the authority.

What replaced the D-U-N-S number for federal purposes?

The Unique Entity ID, obtained at SAM.gov. The GSA's announcement says SAM.gov and all other GSA systems would switch to it on April 4, 2022. A reader who needs a federal identifier goes to SAM.gov, not to Dun & Bradstreet.

The practical result is two questions that older articles blur into one. One is whether the business needs a federal identifier, which is a SAM.gov matter. The other is whether it wants a Dun & Bradstreet file, which is a commercial matter.

What are the SBA's five steps?

First, choose a business structure that makes the company a distinct legal entity, such as an LLC, LLP or corporation. Second, obtain an EIN, which the SBA says can be applied for free using the IRS assistance tool. Third, open a business bank account. Fourth, establish credit with vendors and suppliers who report. Fifth, monitor business credit reports.

The SBA also says that to keep business and personal finances separate, the first step is to start building credit in the company's name. Timelines, score thresholds and approval rules are set by each lender and bureau, not by the SBA's steps.

Glossary: core terms

Business structure. The legal form of the company. The SBA says a structure such as an LLC, LLP or corporation is what makes a business a distinct legal entity. Forming one creates the thing credit can attach to. It does not create credit.

EIN. A federal tax ID number for the business. It is free from the IRS, and the SBA points to the IRS assistance tool. This is where ZenBusiness is relevant, at the entity and EIN steps.

Business bank account. The third SBA step. It keeps money moving in the company's name instead of a personal account. Chase sells business banking. As of 2026-10-06, Business Complete Banking is $15 per month, Performance Business Checking is $40 per month and Platinum Business Checking is $95 per month. Each fee is waivable on stated balance or activity conditions.

Reporting account. An account whose payment history is passed to the business credit bureaus. Only reporting accounts build a file. Each card issuer or vendor can say whether it reports, so ask before opening one.

Personal guarantee. A promise by the owner to repay a company debt personally. Whether a lender requires one is that lender's decision, and forming an LLC does not remove it.

Unique Entity ID. The federal identifier obtained at SAM.gov, which replaced the D-U-N-S number for federal purposes.

Credit summary versus monitoring. A summary is a snapshot of what a bureau shows. Monitoring watches the file over time and comes last in the SBA's sequence, since a new company has little to watch.

Which providers are connected to these terms?

The list is alphabetical, not a ranking, and each figure is dated as of 2026-10-06.

American Express sells business credit cards. Annual fees vary by card, so no single figure applies, and each card's own page lists its fee.

Brex is a corporate card and spend platform. Essentials is free, Premium is $12 per user per month and Enterprise is quote-only.

Dun & Bradstreet is the home of the D-U-N-S number. It lists D&B Credit Insights with a free tier at $0. The paid tiers are Basic at $49 per month or $499 per year, Plus at $149 per month or $1,499 per year, and Premium at $199 per month or $1,999 per year. The CreditSignal name has been retired.

Equifax lists $49.99 for a one-time report and monitoring from $39.99 per month. It does not sell business credit reports directly. They are sold through approved resellers: eCredable for the one-time report and Nav for monitoring.

Experian sells its own reports. The CreditScore Report is $59.95 and the ProfilePlus Report is $69.95, both one-off. Business Credit Advantage is $199 per year and Business CreditScore Pro is $1,995 per year.

Nav has a free plan at $0 that shows business credit summaries from all three bureaus. Its paid plans are Track at $39.99 per month, Build at $49.99 per month and Expand at $74.99 per month. For a first look, Nav's free tier is the broadest no-cost option, and that is the one concession worth making here.

Ramp is a corporate card and spend platform. Its Free plan is $0 per user per month, Plus is $15 per user per month and Enterprise is quote-only. The corporate card itself is free on every tier.

What should be avoided around credit identifiers and fast-credit offers?

Some services sell a D-U-N-S number, or fast business credit, with a fee attached. The FTC says banks and other legitimate lenders will not promise or guarantee a loan or credit before an application. It also says any up-front fee collected before a loan is granted is a cue to walk away, especially one described as insurance, processing or paperwork.

The FTC lists ad language used by scam operators, including "Bad credit? No problem," "No hassle, guaranteed" and "We don't care about your past. You deserve a loan!" A real application involves a decision by the lender. A guarantee in advance, paired with a fee, is the pattern to avoid.

So what is the short version?

A D-U-N-S number is a Dun & Bradstreet identifier, not a federal one, and it is not a step in the SBA's sequence. Form the entity, get the free EIN, open a separate business bank account, set up reporting accounts and then monitor. Add a D-U-N-S number only when a party asks for one or a D&B file is the goal.

Sources

This is general information, not legal, tax or accounting advice, and requirements vary and change.