Nobody knows their real income,just only SM account knows that.You must know im sure their income is extremely high,according to their activities such as advertising,musical,TV show,concerts,selling CDs...Maybe over 1 million USD per ماہ for 9 members.Becoz following the announce from SM ent this year,during 3 years from 2009 til now SNSD has brought 4 SM ent over 125 million USA,its really a large amount of money.SNSD is a real golden machine producing money 4 SM ent,and of course,9 members,each of them are super rich people aging 20's