An EOI is not the same as a visa application. It is an indication that you would like to apply for a skilled visa. There is no fee to submit an EOI. By using SkillSelect you could be found and nominated for a skilled visa by Australian employers or state and territory governments, or you could be invited by the Australian Government to lodge a visa application.
SkillSelect will shorten the time taken to process visa applications and improve the employment prospects of skilled migrants. Make an EOI at SkillSelect.