If you’re starting a business or working with one, you may come across the term business registration number—also known as a company registration number or CRN. But what is it, and why is it important?
Whether you’re a small business owner, freelancer, or corporate executive, understanding your registration number is essential for tax filings, legal compliance, and business credibility.
In this guide, we explain what is the registration number for a business, where to find it, how to get one, and when you need it.
What Is a Business Registration Number?
A business registration number (BRN) is a unique identifier assigned to a business when it officially registers with a government body or authority. It serves as the official proof that a company legally exists and is authorized to operate.
Depending on your country or region, this number might also be called:
- Company Registration Number (CRN)
- Business Identification Number (BIN)
- Employer Identification Number (EIN) (U.S. only for tax purposes)
- Company Number or Incorporation Number
Important: A business registration number is not the same as a tax ID (although both may be required).
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Where to Find Your Business Registration Number
Once your business is registered, you can find your registration number on:
- Your certificate of incorporation
- Your government-issued business license
- State or national business registry websites
- Official tax documentation
- Company documents filed with the Secretary of State (U.S.) or Companies House (UK)
Example (U.S.): In the U.S., you can find your registration number on state business entity databases or from the state where your business was formed.
Example (UK): The CRN is provided by Companies House and appears on all official documents.
Who Issues the Business Registration Number?
The issuing authority depends on your country:
| Country | Issuing Authority |
| United States | Secretary of State (per state) |
| United Kingdom | Companies House |
| Canada | Canada Revenue Agency & Provincial Registries |
| Australia | Australian Business Register (ABR) |
| India | Ministry of Corporate Affairs (MCA) |
Always verify your business entity’s information through the official registry to avoid fraud.
Why a Business Registration Number Is Important
Here’s why your registration number matters:
- Legal Recognition: Confirms that your business is legally established.
- Tax Filings: Required for tax returns, payroll, and government filings.
- Opening Bank Accounts: Banks often need this number to open a business account.
- Business Contracts: Partners, clients, and vendors may request it for due diligence.
- Permits and Licenses: Essential for applying for other local or federal licenses.
Without a registration number, you may not be able to legally operate or scale your business.
How to Get a Business Registration Number
Here’s how to apply for a registration number:
Choose Your Business Structure
Before applying, you’ll need to decide whether you’re a:
- Sole proprietor
- Partnership
- LLC (Limited Liability Company)
- Corporation
- Nonprofit organization
Register With Your Local Authority
Register your business with:
- State government in the U.S.
- Companies House in the UK
- Regional or national authority in your country
Receive Your Registration Number
Once your registration is approved, you’ll receive your number via email or physical mail. Save this in a secure location.
Registration Number vs. Tax ID: What’s the Difference?
| Feature | Business Registration Number | Tax ID (EIN/TIN) |
| Purpose | Identifies your business legally | Identifies your business for taxes |
| Issued By | State or company registry | Tax authority (e.g., IRS in U.S.) |
| Required For | Legal operations, contracts | Payroll, filing taxes |
| Format | Varies by country/state | 9-digit number (in the U.S.) |
Pro Tip: Most businesses need both a registration number and a tax ID.
Can I Look Up a Business Registration Number?
Yes! Most countries provide free access to business registry databases.
Examples:
- U.S.: Secretary of State’s online database
- UK: Companies House search tool
- Canada: NUANS Corporate Search
- Australia: ABN Lookup
- India: MCA Services portal
Use these to verify company details, confirm legitimacy, or conduct B2B research.
What Happens If You Don’t Have a Registration Number?
Operating without a proper business registration may result in:
- Legal penalties or fines
- Ineligibility for business loans or grants
- Loss of business credibility
- Trouble with tax authorities
- Inability to scale or hire legally
Registering your business and obtaining a BRN is one of the first and most essential steps to success.
Quick Summary: What You Need to Know
- A business registration number is a unique ID that proves your company is legally recognized.
- It’s different from a tax ID, though both are usually needed.
- You can find it on official incorporation documents or through government registries.
- Every legitimate business, big or small, should have one.
Conclusion
Your business registration number isn’t just a string of digits—it’s your company’s legal fingerprint. It opens doors to funding, growth, and credibility. Whether you’re registering an LLC or verifying a company for partnership, this number is essential.
Make sure your business is properly registered with the appropriate authorities, and keep that number safe—it’s your key to operating legally and successfully.
FAQs
1. Do all businesses need a registration number?
Not necessarily. Sole proprietors or freelancers may not need one unless required by state or local laws.
2. Can I operate a business without a registration number?
In most cases, no. Especially if you’re hiring employees, collecting sales tax, or applying for permits.
3. Is a business registration number the same worldwide?
No. Every country uses different names, formats, and issuing agencies.
4. How long does it take to get a registration number?
Usually 1–10 business days depending on your region and application method (online or mail).
5. Can I change my business registration number?
No. Once assigned, it remains with your business for life unless you dissolve and re-register.
Also read: Franchise Charge Explained: What It Is and How Much It Costs in 2025
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