“VAT registration is only compulsory when your taxable turnover hits £85,000. However, in some cases, it may be beneficial for your business to register voluntarily before you hit the threshold.
Voluntary VAT registration allows you to reclaim VAT from the last 4 years on goods (provided you still have them), and 6 months for services, provided you have kept VAT invoices. In addition, being VAT registered can boost your business profile.”