If you are in Europe, living outside Hungary, and your country is a member of the *EU, your invoice will not be charged for VAT from your OptiMonk price plan subscriptions only if you provide your EU VAT number during the subscription.
In all the rest of the cases, the value of VAT is determined by Hungarian law,s which is 27%.
*For further information, please visit http://europa.eu/youreurope/business/vat-customs/buy-sell/index_en.htm