VAT Number UK: Find, Apply For and Check It

What a UK VAT number means

A UK VAT number identifies a business registered for value added tax. To find a VAT number in the UK, check the firm's invoices, website, or HMRC records.

A standard UK VAT number starts with GB and has nine digits. For example, GB123456789 is a valid-looking VAT number UK example. The format alone does not prove that the number is active.

HM Revenue & Customs, known as HMRC, gives the number after it accepts a VAT registration. The number belongs to the registered business. It may not belong to every branch or trading name.

• GB marks the United Kingdom in the usual format.
• The next nine digits identify the VAT-registered business.
• Some older records can show special formats for certain groups.
• A number can look correct but still be closed or wrong.

Why businesses need a VAT number

A VAT number lets a business charge VAT on taxable sales. It also lets the business reclaim VAT on eligible purchases. This can lower the net cost of stock, tools, and other business costs.

Most businesses must register when their taxable turnover passes the current VAT threshold. The threshold can change, so check the latest HMRC VAT registration guidance before you act. A business may also register by choice below that threshold.

Registered firms must follow clear record and filing rules. They must put their VAT number on VAT invoices. They must charge the right rate and send VAT returns on time.

Buyers may ask for a supplier's number before paying an invoice. This check helps confirm that the supplier can charge VAT. It also helps the buyer avoid reclaiming VAT from a false invoice.

• Charge VAT on sales when the rules require it.
• Reclaim VAT on eligible business purchases.
• Show the VAT number on VAT invoices.
• Keep sales and purchase records for HMRC checks.

How to apply for a UK VAT number

You apply through HMRC when your business must register or chooses to register. Many firms can apply online. Some business types and special cases need a paper form or extra contact with HMRC.

Before you apply for a VAT number in the UK, gather the facts HMRC will ask for. The exact list depends on your business and reason for registration. Keep your figures clear and up to date.

1. Find your taxable turnover for the past 12 months.
2. Estimate your taxable turnover for the next 30 days.
3. Prepare your Unique Taxpayer Reference, or UTR.
4. Gather company registration details and business contact data.
5. Record your bank details, trade dates, and business activity.
6. Submit the online form, or use the paper route when required.

HMRC may ask for financial information during the application. This can include sales totals, expected sales, and purchase records. A limited company should also have its company number ready.

After approval, HMRC sends your VAT registration details. The notice gives your VAT number and the date registration starts. Do not charge VAT before that date unless HMRC tells you to do so.

Registration can also bring digital filing duties. Many VAT-registered businesses file through Making Tax Digital tools. Check which rules cover your business before choosing your accounting setup.

Where to find a VAT number in the UK

The fastest way to find a VAT number in the UK is often the supplier's invoice. Look near the business name, address, or invoice totals. A proper VAT invoice should show the seller's VAT number.

You can also check the supplier's website. Look at its legal details, terms, or billing page. Treat a website number as a lead, not final proof.

If a supplier will not share its number, ask for it in writing. You can then compare the number with the business name and address. A mismatch needs a clear answer before you reclaim VAT.

• Check recent VAT invoices and credit notes.
• Search the supplier's legal or billing pages.
• Ask the supplier for its registered business details.
• Use the HMRC checker to confirm the number.
• Keep the check date with your purchase records.

The HMRC online service can help you check a UK VAT number. It may return the registered name and address linked to the number. Save that result when the check supports a large purchase or supplier deal.

How to check that a VAT number is valid

Use the HMRC VAT number checker before you rely on a supplier number. Enter the number without spaces if the form asks for that format. Check each digit before you submit it.

A successful check shows that the number is known in the HMRC system. It can also show the name and address linked to that number. Compare those details with the invoice and the real supplier.

Keep the result with your accounts records. Note the date, number checked, supplier name, and result. A later change does not erase the fact that you checked it at that time.

What a failed check can mean

A failed result does not always prove fraud. The number may have a typing error or a recent registration. The supplier may also have a different trading name.

Ask the supplier to confirm the details. Do not reclaim VAT until the invoice and number make sense. Speak with an accountant if the amount or risk is high.

Check	What to compare
Number format	GB followed by nine digits in most cases
Business identity	Supplier name and address on the invoice
HMRC result	Active record and matching details
Purchase record	Check date and saved result

UK VAT number format and examples

The common format is GB plus nine digits. A VAT number UK example is GB987654321. This example shows the shape only. It does not confirm a real registration.

Do not confuse a company number with a VAT number. Companies House gives a company registration number. HMRC gives a VAT number. One does not replace the other.

EU VAT numbers may use another country code and a different digit pattern. A UK firm trading with EU customers may need extra checks. The right process depends on the supply, customer, and place of sale.

• Use the full number on invoices and records.
• Keep the GB prefix when a UK format needs it.
• Do not create a number from the company number.
• Verify the number through an official checker.

Common questions about UK VAT numbers

How do I get a VAT number in the UK?

Register for VAT with HMRC online when your business must or chooses to register. HMRC sends the number after it approves the application.

Can I find a VAT number from a company name?

Sometimes, but a name search may not give a clear match. Check the firm's invoice or website, then ask the firm for its number.

Must a business show its VAT number on invoices?

Yes, a VAT-registered business must show its VAT number on VAT invoices. The invoice must also meet other HMRC invoice rules.

Can I reclaim VAT without checking the number?

Do not rely on an unchecked number. Match the invoice to the supplier and check the number through HMRC when risk is high.

Is every GB number active?

No. The format only shows that the number looks right. The HMRC checker can show whether the record is valid and active.

What if my application has wrong details?

Contact HMRC as soon as you spot the error. Keep copies of your application and any reply.

A VAT number supports trust between buyers, sellers, and HMRC. Apply with accurate records, show the number on each VAT invoice, and check supplier details before you claim VAT.