What Is a Dun & Bradstreet D-U-N-S Number, and Does Your Business Need One?
When starting a business, you quickly encounter a long list of numbers and registrations: your EIN, state registration number, business licenses, and possibly a D-U-N-S Number.
But what exactly is Dun & Bradstreet, what is a D-U-N-S Number, and does every business need one?
For many small-business owners, especially those interested in building business credit, obtaining financing, establishing vendor accounts, or working with larger companies, understanding Dun & Bradstreet can be an important part of preparing a business for growth.
What Is Dun & Bradstreet?
Dun & Bradstreet, commonly called D&B, is a business-data and business-credit reporting company.
D&B maintains business profiles and credit files that may be reviewed by lenders, suppliers, vendors, and other companies when deciding whether to extend credit or do business with a company.
Think of it this way: consumers have personal credit reports, while businesses can have business credit files and scores.
One of the first things associated with a Dun & Bradstreet business profile is a D-U-N-S Number.
What Is a D-U-N-S Number?
D-U-N-S stands for Data Universal Numbering System.
A D-U-N-S Number is a unique nine-digit business identification number issued by Dun & Bradstreet. It connects a business to its D&B business profile and credit file.
Obtaining a D-U-N-S Number by itself does not automatically mean your company has good business credit. Instead, it provides an identifier associated with your D&B file, which can then develop as information and qualifying payment experiences are reported.
D&B states that requesting a D-U-N-S Number is free.
Does Every Business Need a D-U-N-S Number?
No.
A D-U-N-S Number is not generally required simply to own or operate a business. D&B itself states that businesses are not required to have one just to conduct business.
However, having one can become useful depending on what you want your company to accomplish.
Businesses that may particularly benefit include:
LLCs and corporations looking to establish business credit
New businesses that want to begin creating a separate business credit identity
Companies applying for business loans or financing
Businesses seeking vendor or supplier credit
Contractors and service companies working with larger corporations
Companies bidding on certain contracts
Businesses planning to expand, purchase equipment, or obtain commercial credit
Companies that may eventually seek larger credit lines or more favorable vendor terms
D&B notes that lenders, potential business partners, suppliers, and other organizations may use a company's D&B information when evaluating the business.
What About a Brand-New LLC?
A newly formed LLC can consider establishing its business credit profile early.
Your business doesn't necessarily have to wait until it has been operating for several years. In fact, D&B recommends that startups consider establishing business credit early rather than waiting until they need financing.
For example, imagine you just formed:
ABC Home Services LLC
You obtain your EIN, establish your business address, open your business bank account, and begin operating.
You may also obtain a D-U-N-S Number and begin establishing your company's business credit identity.
Over time, qualifying accounts and payment experiences that are reported to business credit bureaus can contribute to the company's business credit history.
EIN vs. D-U-N-S Number: What's the Difference?
These numbers serve very different purposes.
An EIN (Employer Identification Number) is issued by the IRS and is primarily used to identify a business for federal tax purposes.
A D-U-N-S Number is issued by Dun & Bradstreet and identifies a business within D&B's commercial database and business credit system.
Having an EIN does not automatically replace a D-U-N-S Number, and having a D-U-N-S Number does not replace your EIN.
Many established businesses have both.
Does a D-U-N-S Number Build Business Credit Automatically?
No—and this is an important distinction.
Simply obtaining the number does not create excellent business credit overnight.
Building business credit can involve maintaining accurate company information, separating business and personal finances, establishing appropriate credit or trade accounts, and paying obligations responsibly. It also matters whether a particular creditor or vendor actually reports payment information to the business credit bureaus.
A D-U-N-S Number is better viewed as part of the foundation of your Dun & Bradstreet business credit profile.
What Types of Businesses Should Strongly Consider It?
Construction, HVAC and Trade Companies
Contractors frequently purchase equipment, materials, parts, fuel, and supplies. As the company grows, vendor relationships and commercial credit can become increasingly important.
Transportation and Trucking Companies
Companies purchasing vehicles, fuel, equipment, and commercial services may want to develop a business credit profile as they grow.
Real Estate and Property-Related Businesses
Property management companies, investment companies, construction companies, and other real-estate-related businesses may eventually seek commercial financing or vendor relationships.
Retail and E-Commerce Businesses
Businesses purchasing inventory from wholesalers or manufacturers may encounter suppliers that evaluate commercial credit before offering payment terms.
Professional Service Companies
Consulting firms, marketing agencies, cleaning companies, staffing companies, and other service businesses may benefit from establishing a formal commercial identity, particularly when pursuing larger corporate clients.
Businesses Seeking Corporate Contracts
Larger companies may perform due diligence on potential vendors and suppliers. D&B information can be one source used to evaluate businesses and commercial relationships.
What About Government Contracts?
This is where there is an important distinction.
A D-U-N-S Number is no longer the federal government's primary entity identifier for SAM.gov registration.
The federal government replaced the DUNS Number with the Unique Entity Identifier (UEI) on April 4, 2022. Businesses registering in SAM for applicable federal contracting purposes now use a UEI rather than obtaining a DUNS Number solely for SAM registration.
Therefore, if your goal is federal government contracting, don't confuse:
D-U-N-S Number → Dun & Bradstreet/business credit identification
with
UEI → Federal entity identification through SAM.gov
A company may have both for completely different reasons.
Do Sole Proprietors Need a D-U-N-S Number?
They can obtain one, but whether it makes sense depends on their goals.
D&B notes that sole proprietorships may be more closely connected to the owner's personal credit, while LLCs and corporations are separate legal entities that can establish their own business credit profiles.
If you're planning to grow a company, establish vendor relationships, obtain commercial financing, or separate your business identity more clearly from your personal finances, it may be worth exploring whether a formal business entity and business credit profile make sense for your situation.
Before Building Business Credit, Get Your Business Foundation Right
Business credit should not be the first step in forming a company.
Before focusing on credit, make sure the underlying business information is organized and consistent.
Your legal business name, entity registration, EIN, business address, bank account, licenses when applicable, and contact information should accurately identify the same company.
Consistency matters because lenders, vendors, banks, and business-data providers may use information from multiple sources when reviewing a company.
The Bottom Line
Not every business needs a D-U-N-S Number—but many growing businesses can benefit from understanding Dun & Bradstreet and establishing a business credit profile early.
If your long-term plans include business financing, commercial credit, vendor accounts, larger contracts, equipment purchases, or corporate partnerships, it may make sense to establish your D&B profile before you urgently need credit.
The key is to think beyond simply forming an LLC.
Creating the company is the beginning. Building a business that is properly structured, documented, and prepared for growth is the next step.
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