This blog provided by The Taxcom covers all the steps to check VAT numbers using HMRC and other reliable methods.
What Is a VAT Number and Why It Matters
A VAT (Value Added Tax) number is a unique identifier issued by HM Revenue & Customs (HMRC) to businesses in the UK that are registered for VAT. It plays a crucial role in tax compliance and inter-business transactions.
Structure of a UK VAT Number
A standard UK VAT number consists of nine digits, typically prefixed with “GB”. For example: GB123456789. In some cases, government departments or health authorities may use a different format such as GD123 or HA123.
Understanding the format is important because it helps in validating whether the VAT number presented is even structurally correct before performing a deeper check.
Who Needs a VAT Number?
Any UK business with a taxable turnover above the VAT threshold (currently £90,000) must register for VAT. Businesses under this threshold can still voluntarily register, which may enhance their credibility with clients and suppliers.
Why Checking a VAT Number Matters
- Preventing VAT Fraud
By verifying VAT numbers of your suppliers or clients, you protect your business from becoming an accessory to VAT fraud — a serious offence that can lead to financial penalties or legal action. - Ensuring Input VAT Claims Are Valid
To claim input VAT (the VAT you pay on purchases), the invoices must come from a VAT-registered business. If you don’t check the VAT number, HMRC can reject your claim. - Enhancing Business Credibility
Due diligence through VAT verification shows partners and stakeholders that you operate a compliant, well-managed business.
How to Check VAT Number Using HMRC Online Tool
The most direct and reliable way to check a VAT number for a UK company is through HMRC’s official VAT number checking service. This tool confirms whether a VAT number is valid and provides basic details about the company it belongs to.
Step-by-Step Guide to Using the HMRC VAT Checker
- Access the Tool
Go to the official UK Government website at www.gov.uk/check-uk-vat-number. This is HMRC’s dedicated VAT number validation tool. - Enter the VAT Number
Input the VAT number you want to verify. Ensure you include the prefix (usually “GB” for UK companies). - Submit Your Request
Click the “Check” button. The tool will return a result showing whether the VAT number is valid and, if so, the name and address of the business it is registered to.
Information You Can Obtain
- Validity of the VAT number
- Company name associated with the VAT number
- Business address (where available)
- Confirmation that the business is VAT-registered
This tool is updated in real-time using HMRC’s internal systems, so it’s one of the most reliable methods for UK VAT number validation.
Limitations of HMRC VAT Checker
- Only verifies UK VAT numbers.
- Doesn’t provide full company details (e.g. trading name, directors, financials).
- Doesn’t flag suspected fraud or misuse.