Teilnehmer Kosten

Tagungs- can be omitted if clear from context.

Day Delegate definition: "rate is applicable to a group of 15 delegates or more and provides you with morning & afternoon Tea/Coffee refreshments, lunch, meeting room hire, fruit basket and stationary tool box within your room. The costs are spread over the number of delegates in attendance and a price per delegate is given." (www.lyrath.com/conferencing.html)
German equivalents: see links below.

"Tagungspauschale" is often used--but is also a bit confusing--since one might take it to include convention facility hire, etc.