I just checked, it's USD 0.66 (sixty-six cents), or 3.5 Brazilian Reais. That's a cheap fine even by brazilian poverty levels. The most annoying thing about not voting is not the cheap fine, it's the things you can't do if you don't get it sorted out (either by paying the fine or by presenting a valid reason for not voting): you can't work in the public sector, you can't get a passport, etc.