$62 (cost per guest). In 2015, the average cost of wedding catering is between $51-$73 per guest. While many couples spend significantly less than this due to banquet-style dinners, the average spend is around $60 per adult guest. The food served at a wedding reception is determined by the time of the wedding and local custom. Food may range from a single non-alcoholic drink with wedding cake to elaborate, multi-course dinners. The type of food is chosen entirely at the discretion of the hosts and is traditionally provided to guests for free.