VAT payments are made quarterly. Your deadline will depend on when you registered for VAT and when your accounting periods begin and end. So long as you do it online, you’ll normally have a full calendar month plus seven days from the end of your accounting period to complete your VAT return and make your payment. For example:
If your current VAT period runs from May to July 2017 and you pay by Faster Payments, your next VAT deadline will be 7 September 2017. To find your exact VAT return and payment deadline, enter your accounting period and preferred payment method into HMRC’s VAT deadline calculator.