There is income tax .
There is a registration tax. It's 0,5 percent of the capital of the company. This tax has to be payed when the company is established or when it's capital is increased. eg when you establisch a 'BVBA' and the capital would be 18.600 euro, you will have to pay 93 euro registration tax. But there will also be a charge of 25 euro for any document attached to the deed of the notary. So the total tax will probbaly be 118 euro, but that will be included in the total service fee of the notary.