If I buy a business do I need to register for VAT
You must register if your total VAT taxable turnover for the last 12 months was over £85,000 (the VAT threshold) or you expect your turnover to go over £85,000 in the next 30 days. You can choose to register for VAT if your turnover is less than £85,000 (‘voluntary registration’).
How to register for VAT
You can usually register for VAT online. By doing this you’ll register for VAT and create a VAT online account (sometimes known as a ‘Government Gateway account’). You need this to submit your VAT Returns to HM Revenue and Customs (HMRC). https://www.access.service.gov.uk/registration/email
Once you’ve registered You’ll get:a 9-digit VAT number which you must include on all invoices you raise information about when to submit your first VAT return and payment confirmation of your registration date (known as your ‘effective date of registration’) You’ll get this in your online VAT account or by post, depending on how you registered.