DUNS Number in the UK: How to Get and Use One
A DUNS number is a globally recognized business identifier, and UK businesses use it for everything from government procurement to international trade. Whether you are a sole trader in Manchester or a limited company in London, understanding how the DUNS system works within the UK context will help you access opportunities and build commercial credibility.
What Is a DUNS Number and How Does It Apply in the UK?
The DUNS (Data Universal Numbering System) number is a unique nine-digit identifier assigned by Dun & Bradstreet (D&B) to businesses worldwide. In the UK, D&B maintains comprehensive records on millions of companies, drawing data from Companies House filings, county court judgments (CCJs), financial accounts, and trade payment information.
For UK businesses, a DUNS number serves several purposes:
- Credit assessment: Suppliers, lenders, and partners use your D&B profile (tied to your DUNS number) to evaluate your creditworthiness before doing business with you.
- Government procurement: Many UK and international government buyers reference DUNS numbers during the procurement process.
- International trade: If you export goods or services, overseas buyers and partners often request your DUNS number to verify your business identity.
- EU Digital Services Act compliance: UK-based companies operating digital platforms within the EU may need a DUNS number for regulatory verification.
Your DUNS number stays with your business permanently. It does not expire or need renewal, though the associated business data should be kept current.
Dun & Bradstreet in the UK
D&B has had a significant presence in the UK for decades. The company maintains a UK-specific database that includes data on approximately 6 million UK business entities, from large PLCs to sole traders.
D&B UK offers several services to British businesses:
- Free DUNS number registration: Any UK business can request a DUNS number at no cost through D&B's website.
- D&B Credit Reports: Paid reports that provide detailed financial analysis of UK companies, including failure scores, delinquency predictors, and payment behavior summaries.
- Credit monitoring: Services that alert you when your company's D&B rating changes or when a third party runs a credit check against your DUNS number.
- Data update services: Tools to ensure your business information in the D&B database is accurate and up to date.
D&B UK pulls data from multiple sources including Companies House, the Registry Trust (for CCJ data), the Electoral Roll, and direct trade payment reports from participating businesses.
UK Government Procurement and DUNS Numbers
Central Government Contracts
UK central government procurement is managed through platforms like Contracts Finder and the Crown Commercial Service. While the UK government does not universally mandate a DUNS number for all procurement, many contracting authorities reference D&B data as part of their supplier due diligence process.
If you are bidding on contracts through the UK government's Find a Tender service (which replaced OJEU notices post-Brexit), having a DUNS number strengthens your application by providing a verifiable third-party business identity.
Defence Procurement
The Ministry of Defence (MoD) and NATO-related contracts frequently require a DUNS number. If your business works in defence supply chains, a DUNS number is effectively mandatory. NATO's CAGE code system interfaces with the DUNS database, and many defence procurement officials use DUNS numbers to verify suppliers.
International Government Contracts
If your UK business pursues contracts with the U.S. federal government, a DUNS number is required for registration on SAM.gov. This is especially relevant for UK defence and technology firms that participate in U.S. government programs. Learn more about DUNS numbers for government contracts.
NHS and Public Sector
NHS Trusts and other public sector bodies often use D&B credit checks as part of their supplier qualification processes. Having a clean, up-to-date DUNS profile can speed up the onboarding process when you are selected as a supplier to the NHS or local councils.
Companies House Registration vs DUNS Number
UK businesses often wonder how their Companies House registration relates to their DUNS number. They are entirely separate systems.
| Feature | Companies House | DUNS Number |
|---|---|---|
| Operated By | UK Government (BEIS) | Dun & Bradstreet (private) |
| Legal Requirement | Mandatory for Ltd companies, LLPs, PLCs | Voluntary (but often practically required) |
| Identifier | Company Number (8 digits) | DUNS Number (9 digits) |
| Information Held | Directors, shareholders, accounts, filings | Credit score, payment history, financial analysis |
| Public Access | Free via Companies House website | Basic info free; detailed reports paid |
| Geographic Scope | England, Wales, Scotland (separate for NI) | Global (200+ countries) |
| Sole Traders | Not registered at Companies House | Can obtain a DUNS number |
Key points to understand:
- Companies House registration is a legal requirement for limited companies, LLPs, and PLCs in the UK. You cannot trade as a limited company without it.
- A DUNS number is not a legal requirement but is a practical necessity for many commercial activities.
- D&B automatically assigns DUNS numbers to many UK limited companies based on Companies House data. Your business may already have one without you knowing. You can check here.
- Sole traders and partnerships are not registered at Companies House but can still obtain a DUNS number from D&B.
D&B regularly imports data from Companies House, so your DUNS record should reflect your filed accounts, registered address, and director information. However, if you have recently made changes at Companies House, there may be a lag before D&B updates your record.
Step-by-Step: How UK Businesses Get a DUNS Number
Step 1: Check If You Already Have One
Many UK businesses already have a DUNS number assigned automatically by D&B based on public records. Before applying, search for your business using your company name or registered address. You might save yourself the application process entirely.
Step 2: Gather Your Business Information
If you do not already have a DUNS number, prepare the following:
- Registered company name (as it appears on Companies House, if applicable)
- Trading name (if different from registered name)
- Registered address and principal place of business
- Companies House number (for limited companies)
- VAT registration number
- SIC code (Standard Industrial Classification)
- Number of employees
- Annual turnover (approximate is fine)
- Name and contact details of a senior officer (director or owner)
Step 3: Apply Through D&B
Visit the Dun & Bradstreet UK website and navigate to their DUNS number request page. Complete the online form with your business details. D&B will verify your information against public records and their existing database.
- Free registration: Takes up to 30 business days. D&B may contact you to verify details.
- Expedited registration: D&B offers paid options for faster processing, usually within 1-5 business days.
Step 4: Verify Your Details
Once your DUNS number is assigned, log in to D&B's portal to review your business profile. Check that the following are accurate:
- Legal name and trading name
- Registered and operating addresses
- SIC codes and industry classification
- Number of employees and turnover figures
- Director/officer information
Inaccurate data can hurt your D&B credit score and create confusion for potential partners or clients checking your profile.
Step 5: Maintain Your Profile
D&B updates records continuously from public sources, but you should proactively update your profile when significant changes occur, such as a change of address, new directors, or substantial changes in revenue or employee count. You can learn more about the process.
UK-Specific Common Issues
Issue 1: Duplicate DUNS Numbers
Because D&B automatically creates records from public data, some UK businesses end up with multiple DUNS numbers, especially if they have changed names, addresses, or legal structures. If you discover duplicates, contact D&B UK directly to have the records merged or deactivated.
Issue 2: Inaccurate Financial Data
D&B derives financial data from Companies House filings, which may be abbreviated accounts (especially for small companies taking advantage of filing exemptions). This can lead to incomplete or misleading financial profiles. If your D&B record shows inaccurate financials, provide updated figures directly to D&B through their data update process.
Issue 3: Branch vs Headquarters
If your UK entity is a branch or subsidiary of an overseas parent company, D&B will create a separate DUNS number for the UK branch but link it to the parent's DUNS. Make sure the linkage is correct, as errors in the corporate family tree can affect your credit rating and confuse contracting officers.
Issue 4: Sole Trader Challenges
Sole traders sometimes face delays because D&B has fewer public data sources to verify their identity compared to limited companies. Be prepared to provide additional documentation such as a bank statement or utility bill showing your business name and address.
Issue 5: Post-Brexit Procurement Changes
Since Brexit, the UK procurement landscape has evolved. The Procurement Act 2023 introduced changes to how public sector buyers evaluate suppliers. While DUNS numbers are not specifically mandated under the new framework, the underlying principle of verifiable business identity remains. Maintaining an accurate DUNS profile keeps you ready for whatever procurement requirements emerge.
Next Steps for UK Businesses
- Search for your DUNS number to see if your business is already in the D&B database
- Read more about what a DUNS number is and its global significance
- Check UK-specific information on our country guide
- Learn the full application process for getting your DUNS number
A DUNS number is a small step that opens significant doors for UK businesses, from winning government contracts to building international credibility. Whether you are a startup looking to establish your commercial identity or an established firm expanding into new markets, keeping your DUNS profile current is a practical investment in your business's future.