According to the Australian Securities and Investments Commission’s latest data, the average wedding in Australia costs $36,200 with the bulk of the cost going towards food and alcohol.This infographic breaks down where the money typically goes, along with tips on how you can save a few bucks here and there.elow you’ll find ASIC’s breakdown of average wedding costs as well as where the money typically comes from (not surprisingly, parent contributions and bank loans figure prominently).