A small symposium for 30 to 80 participants costs 5,000 to 15,000 euros+. A medium-sized symposium for 80 to 200 participants sits between 15,000 and 40,000 euros. A large symposium for 200+ participants costs 40,000 to 80,000 euros or more.
The price depends on venue, number of speakers, technical production and catering. Tip: consider sponsorship or partner contributions to share the costs.