How to Find a VAT Number by Company Name (UK Guide)

VAT touches almost every business transaction in the UK.

Even if your own business isn’t VAT-registered, there will be moments when you need to find or verify another company’s VAT number—for invoicing, reclaiming VAT, checking legitimacy, or staying compliant.

The question is simple:
How do you find a VAT number using just a company name?

This guide walks you through what a VAT number is, why it matters, where to look, and how to verify it correctly—without guesswork or risk.

What Is a VAT Number?

A VAT number (also called a VAT registration or VAT identification number) is a unique reference assigned by HMRC to businesses registered for Value Added Tax.

It is used to:

• Track VAT charged on sales and reclaimed on purchases
• Identify businesses within the UK tax system
• Ensure VAT is collected, reported, and audited correctly

In the UK, VAT numbers usually follow this format:
GB + 9 digits (for example: GB123456789).

Why VAT Numbers Matter More Than You Think

A VAT number isn’t just administrative detail—it has legal and financial consequences.

You’ll need it when:

• Issuing or receiving VAT invoices (VAT numbers are legally required)
• Filing VAT Returns with HMRC
• Reclaiming VAT on eligible business expenses
• Assessing business credibility when dealing with suppliers or partners

If a VAT number is missing—or invalid—it can invalidate invoices and trigger compliance issues.

How to Check a UK VAT Number

Before trusting or using a VAT number, it’s essential to verify it.

1. HMRC VAT Number Checker (Recommended)

HMRC provides a free online VAT checker that allows you to:

• Confirm whether a VAT number is valid
• See the registered business name and address linked to it

This should always be your final confirmation step.

2. Contact HMRC Directly

You can also verify VAT numbers by calling HMRC’s VAT helpline.
This route is useful if:

• You need clarification
• The online checker doesn’t return clear results

3. EU VIES VAT Checker (for EU Businesses)

For EU-based companies, the EU’s VIES system allows VAT number verification across member states.

⚠️ Important:

• This does not apply to UK businesses after Brexit
• Northern Ireland businesses may still appear under specific NI VAT rules

How to Find a VAT Number by Company Name

If you don’t already have the VAT number, here are the most reliable ways to find it using just the business name.

1. Check the Company Website

Many businesses display their VAT number in:

• Website footers
• Contact or “Legal” pages
• Terms & Conditions

This is often the quickest route.

2. Look at Invoices or Receipts

VAT-registered businesses are legally required to include their VAT number on VAT invoices.

Check:

• Invoice headers or footers
• PDF receipts
• Supplier statements

3. Ask the Business Directly

If you can’t find it online, ask them.

A VAT-registered business is required to provide its VAT number upon request.
Hesitation or refusal is a red flag.

4. Cross-Check with HMRC

Once you’ve found a VAT number—always verify it using HMRC’s VAT checker before using it for invoicing or VAT claims.

Red Flags to Watch Out For

Be cautious if:

• A business cannot provide a VAT number but claims to be VAT-registered
• The VAT number doesn’t match the business name on HMRC’s checker
• Invoices include VAT but no registration number

These issues can expose you to invalid VAT claims or compliance risks.

Key Takeaways

• VAT numbers are essential for invoicing, VAT returns, and trust
• HMRC’s VAT checker is the most reliable verification tool
• VAT numbers can often be found on websites, invoices, or by asking directly
• Always verify before using a VAT number for compliance or claims

Need Help with VAT or Verification?

Whether you’re:

• Registering for VAT
• Verifying suppliers
• Dealing with VAT invoices or returns

Elixir helps businesses handle VAT with clarity and confidence—so you don’t lose time, money, or peace of mind.

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