Itemised invoices are sent by email at the start of the month following your event, whether it's a one off, periodic or weekly event. The invoice will have VAT added on to it which some businesses and charities can claim back, according to their circumstances. Payment needs to be received within 14 days of the invoice date to avoid late payment charges. The invoice will include details of Question One's bank account so that you can transfer the money easily and electronically.