Check British VAT Number: HMRC Guide

You can check a British VAT number through HMRC’s official online verification service. The result shows whether the number is valid and displays the registered business name and address. Comparing those details with the supplier’s invoice helps identify incorrect, cancelled or potentially misused VAT numbers.

A VAT check should form part of normal supplier and invoice verification. A number can follow the correct nine-digit format without belonging to the business using it, so checking its mathematical structure is not sufficient. The HMRC VAT checker provides stronger evidence because it checks the number against the UK VAT register.

You normally need the VAT registration number before starting the search. HMRC does not provide a public reverse lookup that finds a VAT number from a company name alone. If the number is missing, request it from the business or check its invoices, receipts, contractual documents and official website.

What Is a UK VAT Number?

A VAT identification number, VAT ID number and VAT registration number generally mean the same thing in the UK. HMRC assigns the number after approving a VAT registration. The registered person uses it when issuing VAT invoices, filing returns and communicating with HMRC about VAT.

The number identifies the VAT registration rather than a specific invoice or transaction. A sole trader, partnership, limited company, charity or other organisation can receive one if it registers. Some VAT groups and transferred businesses may retain a registration number under particular rules.

A VAT number is different from a Company Registration Number, Unique Taxpayer Reference and Employer PAYE reference. Companies House issues the company number, while HMRC issues VAT and other tax references. Substituting one reference for another can cause invoice, payment and verification errors.

Only a VAT-registered business may issue a VAT invoice and separately charge an amount as VAT. A supplier awaiting registration cannot invent a number or describe an estimated amount as VAT. HMRC’s registration guidance states that VAT must not be included on invoices until the registration number has been received.

How to Check a British VAT Number

The safest way to check a British VAT number is HMRC’s Check a UK VAT number service. It confirms whether a UK registration number is valid and returns the name and address associated with it. The service is free and should be reached independently through GOV.UK.

• Obtain the complete VAT number from the supplier.
• Open HMRC’s official UK VAT checker.
• Enter the number without changing or guessing any digits.
• Confirm that the result says the registration is valid.
• Compare the registered name with the legal or trading name on the invoice.
• Compare the returned address with the supplier’s known business details.
• Save evidence of the result when the transaction carries material VAT risk.

A valid result confirms that the number appears on HMRC’s register. It does not automatically prove that every invoice is genuine, that the person who sent it represents the registered business or that the VAT treatment is correct. The invoice, bank details, contact information and commercial circumstances should still be reviewed.

If the number belongs to a completely different business, do not reclaim the VAT without resolving the discrepancy. Ask the supplier for a corrected invoice and explanation. Deliberately using another business’s VAT number can indicate fraud, but a mismatch can also result from a typing error, outdated business details or an invoicing-system problem.

VAT Checker UK

Many websites offer an online VAT checker, but they may rely only on a mathematical validation formula or outdated third-party data. A format check can identify an impossible combination of digits, but it cannot prove that the registration is active or belongs to the named supplier. HMRC’s own register is the authoritative source for a United Kingdom VAT number check.

The HMRC service requires the VAT number being checked. It does not require the user to be VAT registered for a basic validity search. However, a UK VAT-registered business can enter its own number to obtain a reference showing when it completed the check.

That reference can support a business’s due-diligence records. Keep it with the supplier setup documents, relevant invoice or transaction file. A saved check does not replace a valid VAT invoice, but it can demonstrate that the business took reasonable steps to verify the registration.

HMRC also publishes a service availability and issues page. Check that page if a registration unexpectedly appears invalid or the service is unavailable. HMRC has acknowledged that new registrations and recent changes may occasionally take time to appear.

How to Verify a VAT ID Properly

VAT verification involves more than confirming that a number exists. The number must belong to the business making the supply, and the invoice details should be consistent with the returned record. An active number associated with an unrelated company does not validate the supplier’s invoice.

Check the legal name, trading name and address carefully. Minor differences can be legitimate when a registered legal entity uses a trading name, but a significant mismatch needs clarification. Where necessary, compare the details with a contract, supplier website and Companies House record.

Companies House can confirm information such as a limited company’s name, number, registered office, status and filing history. It does not operate the UK VAT register and generally cannot confirm VAT registration from a company-name search. A company may also trade lawfully without being VAT registered if registration is not compulsory and it has not registered voluntarily.

What a valid VAT result proves

• The VAT registration number appears valid in the relevant official system.
• The number is connected to the displayed registered name and address.
• The check was completed at a particular time.

What a valid VAT result does not prove

• That the invoice was genuinely issued by the registered business.
• That the bank account belongs to the registered business.
• That the correct VAT rate or place-of-supply rule was applied.
• That the supplier is financially stable, trustworthy or authorised for regulated work.
• That every item of input VAT on the invoice is recoverable.

For higher-risk transactions, independently contact the supplier using previously verified details. Avoid relying on a new telephone number or email address appearing only on the questionable invoice. A changed bank account combined with an unexpected invoice should be verified before payment.

How to Find a VAT Number

A registered supplier must include its VAT registration number on a full VAT invoice. It may also appear on simplified VAT receipts, order documents, contracts, letterheads or the business’s website. Search for labels such as “VAT number,” “VAT registration number,” “VRN” or “VAT ID.”

If the number does not appear on the document, ask the supplier to provide a valid VAT invoice. Do not calculate and reclaim VAT merely because the price appears to include it. Input VAT recovery normally requires appropriate evidence, and an ordinary invoice from an unregistered supplier is not a VAT invoice.

A number shown in a website footer should still be checked against HMRC’s register. Websites can contain old numbers, typing errors or copied legal information. Match the returned business details with the entity that actually supplied the goods or services.

Where can I find my VAT number?

A business can find its own number on its VAT registration certificate or in its HMRC VAT online account. It should also appear on previously issued VAT invoices, submitted returns and correspondence from HMRC. The number used as a standard VAT payment reference is the same nine-digit registration number without spaces.

HMRC’s VAT payment guidance confirms that the number is available in the VAT online account and on the registration certificate. If access has been lost, use the official online-support route rather than applying for a new registration. A second application could create avoidable confusion.

Can You Find a Company’s VAT Number by Name?

A VAT number check by company name is not available through HMRC’s public service. The official checker expressly states that users cannot search whether a business or organisation is registered by entering its name. This prevents the checker from operating as a complete public directory of VAT-registered businesses.

Companies House also does not provide an authoritative VAT number lookup by company name. Its register can identify the correct legal company and registered address, but VAT registration is administered separately by HMRC. A limited company number should not be entered into the VAT checker as if it were a VAT number.

To find a company VAT number, check its VAT invoices, receipts, contractual documents and website or ask the accounts department directly. Once obtained, enter the number into HMRC’s service. This changes the task from trying to discover a number by name to verifying a number supplied by the company.

Third-party databases may advertise a VAT number check by company name UK search. Their coverage, accuracy and update frequency can vary, so the result should not replace HMRC verification. Never rely on an unverified database entry when reclaiming VAT or applying cross-border VAT treatment.

How to Check Whether a Company Is VAT Registered

Ask the company for its VAT registration number and a VAT invoice. Enter the number into the official checker and compare the returned name and address. A matching valid result is the clearest public confirmation available through HMRC’s service.

The absence of a number from the company’s website does not prove that it is unregistered. Businesses are not required to publish their VAT registration publicly on every website page. However, a registered supplier charging VAT must provide the required VAT invoice information.

A Companies House listing does not mean the company is VAT registered. VAT registration depends on taxable turnover, voluntary registration and other statutory rules, while incorporation is a separate legal process. Equally, a sole trader or partnership can be VAT registered without appearing as a limited company on Companies House.

If a supplier charges an amount described as VAT but refuses to provide a registration number or valid invoice, do not treat the charge as recoverable input VAT. Ask for corrected documentation and consider contacting HMRC if deliberate misuse is suspected. Keep the original invoice, correspondence and payment evidence.

What Does a UK VAT Number Look Like?

HMRC normally issues a unique nine-digit VAT registration number. It may be written as one continuous number or separated into groups for readability. A fictional example is 123 4567 89, or GB 123 4567 89 when the country prefix is shown.

The GB prefix is not an extra part of the underlying nine-digit registration. It identifies the United Kingdom in an international context. Spaces and punctuation may be removed when entering the number into an online service or using it as a payment reference.

Some systems accept a 12-digit number where a three-digit branch or divisional suffix follows the main nine-digit registration. HMRC’s current VAT-checking API supports nine-digit and 12-digit entries. Businesses should enter the full number supplied on the relevant invoice rather than removing a genuine branch suffix without checking.

Government departments and certain public bodies can use special registration sequences. These are exceptions and should not be used as templates for an ordinary commercial business. For a normal UK trader, expect a nine-digit HMRC VAT registration number.

VAT number versus company number

A VAT number normally contains nine digits, while a Companies House number commonly has eight characters and can include letters. A company UTR contains ten digits. The presence of several business references on the same document makes it important to identify the one explicitly labelled for VAT.

How to Get a VAT Number

A UK-established business generally must register when taxable turnover for the previous rolling 12 months exceeds £90,000. Registration is also required when the business expects taxable turnover to exceed £90,000 during the next 30 days alone. Businesses below the threshold can apply voluntarily when registration suits their circumstances.

Most applications can be completed through HMRC’s online VAT registration service. The required information depends on whether the applicant is a limited company, individual, partnership or another organisation. It can include bank details, turnover, business activities, UTR and identity information.

After approval, HMRC provides a nine-digit registration number, effective registration date and information about the first VAT Return. HMRC also signs up the business for Making Tax Digital for VAT unless an exemption applies or has been requested. The business should create its VAT account and arrange compatible record-keeping software.

The business can begin charging and reclaiming VAT from its effective registration date, subject to the normal rules. However, it cannot show VAT as a separate invoice charge until the registration number is received. During the waiting period, it can adjust its overall prices to account for the VAT it will owe and issue corrected documentation once registered.

VIES VAT Checker

VIES is the European Commission’s VAT Information Exchange System. It checks whether a VAT identification number is recorded for qualifying cross-border transactions within the EU VAT system. Businesses can use the official VIES VAT checker rather than an unaffiliated validation website.

Since the UK left the EU VAT system, an ordinary GB VAT number is not generally checked through VIES. UK registrations should be verified through HMRC’s service. Northern Ireland remains aligned with specified EU VAT rules for movements of goods under the Windsor Framework.

Where appropriate, a Northern Ireland business trading goods with an EU business adds the XI prefix to its normal nine-digit UK VAT number. HMRC’s current Northern Ireland VAT guidance confirms that XI is used for relevant movements of goods between Northern Ireland and the EU. It is not generally used for services, ordinary internal UK supplies or transactions between the UK and the rest of the world.

A failed VIES result does not always prove that a business is unregistered. The wrong country prefix may have been selected, the number may be newly activated for cross-border trade or the relevant national database may be temporarily unavailable. Check the number with the supplier and retain evidence of any further verification.

What to Do When a VAT Number Is Invalid

First, compare the entered number with the original invoice. Common problems include omitted digits, transposed numbers, entering a company number or adding an inappropriate country prefix. Entering a trading name instead of a number will not work because HMRC does not support name-based searches.

Ask the supplier to confirm the number and provide its VAT registration certificate or corrected invoice where appropriate. A newly registered business may not appear immediately in every system. HMRC guidance acknowledges that recent registrations or detail changes can occasionally take time to reach the online checker.

If the supplier confirms that the number is correct but the HMRC checker continues to reject it, use the checker’s problem-reporting link or contact HMRC VAT support. Do not change digits until the system produces a valid result. A checksum guess does not establish the real registration.

Where the invoice is otherwise due for payment, separate the commercial payment question from the input VAT claim. Contractual advice may be required before withholding the entire invoice. However, the customer should not reclaim questionable VAT merely to meet a VAT Return deadline.

Common VAT Number Mistakes

A frequent error is entering a Companies House number, UTR or PAYE reference into the VAT checker. Each identifier belongs to a different registration system. Look for the words “VAT registration number” or “VAT number” on the invoice.

Businesses also treat a valid result as proof that the invoice is genuine. A fraudster can copy a real VAT number from another company. The returned business name and address must therefore be compared with the supplier and invoice.

Another mistake is assuming that HMRC offers a VAT number check by company name. The user must already have the number. Third-party company searches can help locate possible information, but the final validity check should use the official HMRC service.

Cross-border traders sometimes enter a GB number into VIES or add XI to a transaction involving services. The correct checker and prefix depend on the transaction. XI generally relates to qualifying Northern Ireland movements of goods involving the EU.

Finally, businesses fail to retain evidence of significant checks. When the customer is VAT registered, entering its own VAT number into HMRC’s checker can produce a reference confirming when the check occurred. Saving that reference with the invoice can support future due diligence.

VAT Number Verification Checklist

• Obtain the number from a VAT invoice or directly from the supplier.
• Check that an ordinary UK number has nine digits.
• Use HMRC for GB and general UK VAT number verification.
• Use VIES for EU numbers and relevant Northern Ireland XI numbers.
• Match the returned name and address to the supplier.
• Compare the business with Companies House where appropriate.
• Investigate changed bank details or contact information separately.
• Keep the HMRC check reference when available.
• Do not reclaim VAT while a material discrepancy remains unresolved.

A VAT number check is quick, but it should not be reduced to entering digits and accepting a green result. The number, supplier and transaction must make sense together. This is especially important when onboarding a new supplier, paying a high-value invoice or applying a cross-border VAT rule.

The UK VAT calculator can help check the VAT arithmetic shown on an invoice. It cannot verify that the supplier is registered or that the selected VAT rate is legally correct. Use it alongside, rather than instead of, HMRC verification.

This guide provides general information about checking UK VAT numbers and VAT registration. Verification results and business circumstances can change, and a valid number does not prove that every invoice or transaction is genuine. For personalised advice, consult a qualified tax adviser or contact HMRC directly. Always use GOV.UK’s official VAT checker for current UK registration information.