The usual way to calculate flood damage is to use flood-damage curves. It is possible to develop standard flood-damage functions for some land uses, However, it is not possible to develop a standard flood-damage function for industries. The best option is then to complete questionnaires at every industrial plant on the flood plain and to use this information to calculate tlood damage. To calculate industrial flood damage, the damage to four components must be estimated and added to obtain the total damage to the plant. The four components are plant and equipment, raw materials, completed goods and structure. These components were combined to calculate the flood-damage potential for a plant on the Vereeniging flood plain. The mean annual damage was calculated as R0.94 m.