Validating uk vat number
When a business sets up a new purchase ledger account for example, it is good practice to check the supplier’s VAT number because, if it is invalid, so is the tax invoice and HMRC may disallow your input tax claim.
It is equally important when dealing with sales to businesses in other EU Member States because if you get the VAT number wrong you should not zero-rate the sale and HMRC will assess you if you have.
So for example, the VAT number for HSBC bank is GB 365684514 the calculation is: The total of the above calculation is 24 42 30 30 32 12 10=180.
You can check a VAT registration number in two ways This relies on the fact that for UK VAT registration numbers, the last two numbers are calculated by applying a standard formula to the other seven numbers.
This checker can only confirm whether a VAT registration number complies with the required format.
Even if there is a VAT registration number on an invoice it may be a false number.
All United Kingdom (UK) VAT registration numbers have nine digits.