Just received this information from my migration agent. I've looked on the web site and it appears that different visas have different charges. From July 1st there will be a charge for each applicant. Best start putting extra pennies in the pot!!!!
The Department of Immigration (DIAC) normally announce an increase in the Visa Application Charge (VAC) effective from 1 July each year. This increase is normally fairly small / in line with the increase in the consumer price index.
This year they have chosen not to increase the VAC for a primary applicant in most cases. However, they have decided on an additional charge for each secondary applicant. Full information on this is available on their website pagehttp://www.immi.gov.au/allforms/new-visa-charges-1july2013/
Among the changes are these additional applicant or "per person" charges. For skilled visa application there is an additional charge of A$1,530 for additional persons over the age of 18, and A$765 for those under 18.