Q. My company designs websites. If my customer is a business in the Republic of Ireland can I apply zero rate VAT to the sales invoice? Do I need their VAT number before I can do this? Is the situation different if my customer is a private individual?

A. Website design is a service, so the VAT treatment depends on whether your customer is a business or not. You should retain some evidence to prove whether your customer is in business, but you don't need to hold its VAT number if your customer is not VAT registered.

Where your Irish customer is a business, and will use the service you provide for business purposes, the service you are providing is outside the scope of VAT. Your customer must apply the local Irish VAT to what it buys under the reverse charge rules. 'Outside the scope of VAT' means you do not apply VAT to your sale. If your business is VAT registered you will need to ask for its VAT number to report the sale on your EC sales list form. Only sales to VAT registered businesses are reported on that form.

If your Irish customer does not operate as a business, you must apply VAT at UK rates to your invoice, just as if your customer was located in the UK.