If you plan to sell to the government, work with large corporations, or build serious business credit, someone will eventually ask for your DUNS number. Learning how to get a DUNS number is quick — and free — once you know what it is and where to apply. Many owners delay it because the name sounds intimidating; it is actually one of the simplest registrations in business.
This guide explains what a DUNS number is, who needs one, how to apply step by step, and how it connects to your business credit profile after you receive it.
What Is a DUNS Number?
A DUNS number is a unique nine-digit identifier for a business, issued by Dun & Bradstreet, a major business data and credit reporting company. Each physical location of a business can have its own number. Lenders, suppliers, large buyers, and government agencies use it to pull up your business’s identity and credit file in Dun & Bradstreet’s database.
Think of it as your business’s listing in the commercial world’s phone book — except the listing also carries a credit history. It is different from your EIN, which the IRS uses for taxes, and different from a state registration. You can hold all three, and each serves a separate audience.
Getting the number early fits naturally into the launch sequence in our guide on how to start a business in the USA, right after formation and your tax ID, because suppliers and buyers may search for your profile before your first big order.
Who Needs a DUNS Number?
You will need one if you want to pursue federal contracts or grants, since registration systems for government work rely on business identifiers and Dun & Bradstreet data has long been part of that process. Many state and local programs, universities, and Fortune-level corporations also require vendors to have a DUNS number before onboarding.
Beyond requirements, any business that wants to build business credit benefits from having one. Your Dun & Bradstreet profile is where payment experiences from suppliers get reported, forming scores that lenders and vendors review. Without a number, that file is thin or nonexistent, and you start every credit conversation from zero.
Small suppliers feel this most. A manufacturer or distributor deciding whether to give you net-30 terms will check your profile first; the same check happens behind the scenes when you apply for small business loans with many lenders. Even businesses growing out of the gig stage in our side hustle ideas list find that a DUNS number marks the moment they became a “real” vendor in buyers’ systems.
How to Get a DUNS Number: Step by Step
Step 1: Check whether you already have one
Search Dun & Bradstreet’s lookup tools before applying. A number may already exist if a supplier, lender, or data partner reported your business. Requesting a duplicate creates confusion, so verify first using your legal business name and address.
Step 2: Gather your business details
Have ready: your legal business name and any trade name, physical business address, phone number, the owner’s name and title, the year the business started, your industry, and an estimate of employees. Accuracy matters — the name should match your formation documents and any DBA registration exactly, so every database describes the same company.
Step 3: Apply on the Dun & Bradstreet website
The standard application is online and free. You will create an account, enter the business details, and confirm your identity as an authorized representative. Beware of third-party sites charging fees to “expedite” a number that the official channel issues at no cost — the same warning applies to many of the startup costs new owners face.
Step 4: Wait for issuance and confirm your listing
Free applications are typically processed within a number of business days; paid expedited options exist but are rarely necessary if you apply before a deadline looms. Once issued, look up your profile and verify every field. Correct errors immediately, because buyers will judge the listing you have, not the one you meant to create.
Step 5: Keep the profile alive
Update your information when you move, rebrand, or change ownership. An outdated address — especially one that conflicts with your registered agent address or bank records — creates friction in credit checks and vendor onboarding.
After You Get It: Building the Credit File
The number is the doorway; payment history is the house. Open accounts with suppliers that report payment experiences, even small ones, and pay early or on time every cycle. Over months, those reports build the scores vendors check before extending terms. This is the same patience-based system behind personal credit, and the principles in our guide on how to improve your credit score translate surprisingly well to the business side.
Clean records power the whole process. Your small business bookkeeping should make it trivial to prove revenue, payables, and payment timing when a lender or buyer asks. Pair that with appropriate small business insurance, since serious buyers often require certificates before the first purchase order.
Present the number where it helps: in vendor applications, capability statements, and the company profile section of your business plan. And if you are still choosing a structure, note that sole proprietors can hold a DUNS number too — entity choice, covered in our LLC vs sole proprietorship comparison, does not block you from building a credit identity.
Putting Your DUNS Number to Work in Vendor Applications
Once the number exists, use it deliberately. Enter it on every supplier credit application, even when the form marks it optional, because reported payment experiences attach to that identifier. Ask new vendors whether they report to Dun & Bradstreet; a supplier who reports is worth slightly more to your credit future than one who does not, all else being equal.
Prepare for the way big buyers evaluate you. Procurement teams often pull your profile before the first conversation, checking how long you have operated, whether your information is consistent, and whether your payment scores suggest reliability. A complete, accurate, and active profile answers those questions before they are asked. If your file shows thin data, do not panic — say so, offer trade references directly, and start building reported history with the accounts you open this quarter.
Revisit the profile every six months. Confirm the address, phone, executive names, and employee count still match reality, and check that no unfamiliar inquiries or incorrect trade lines have appeared. Just like personal credit reports, business files can contain errors, and the owner who monitors theirs catches problems while they are still cheap to fix.
Common Problems and Fixes
- Duplicate numbers for one location. Contact Dun & Bradstreet to merge or correct records so your credit history is not split.
- Name or address mismatches. Align the listing with your legal documents everywhere; mismatches stall approvals.
- Confusing DUNS with other IDs. Government registration may also require a separate unique entity identifier issued through the official federal system — check current requirements for the program you are pursuing.
- Paying for a free number. Apply only through the official Dun & Bradstreet channel unless you knowingly choose a paid add-on service.
- Applying at the last minute. Vendor and grant deadlines do not move; request the number when you form the business, not when the application is due.
One more habit separates businesses that benefit from the system from those that ignore it: ask every new supplier, during onboarding, a single question — “Do you report payment experiences, and to which bureaus?” Write the answer in the vendor’s file. Within a year you will know exactly which relationships are building your credit profile and which are invisible, and you can shift purchasing volume toward the reporters when prices are otherwise equal.
Frequently Asked Questions
How much does a DUNS number cost?
The number itself is free when you apply directly through Dun & Bradstreet. Optional paid products — faster processing or credit-building bundles — are extras, not requirements. Read any offer carefully before paying.
How long does it take to get a DUNS number?
Standard free processing typically takes a number of business days, while expedited paid options are faster. Timelines vary, so apply early if a contract, grant, or vendor onboarding has a deadline attached.
Does every business location need its own number?
Generally, each distinct physical location can have its own DUNS number, since the system identifies businesses by location. Headquarters and branches are listed separately so buyers and agencies can evaluate the exact site they will work with.
It is free, fast, and permanent — there is little reason for any serious business to put it off.
Final Thoughts
A DUNS number takes minutes to request and quietly works for you for years: it anchors your business credit file, unlocks vendor terms, and opens the door to government and corporate buyers. Check for an existing number, apply free through the official site, verify your listing, and then build the payment history that makes the number valuable.
