Could somebody please explain to me what DIRT rate means? I have a special bonus saver account with BOI. I have been saving 100E every month since nov 2007 in this account. I got a letter that I will be charged 25% DIRT RATE . Nobody picks up the phone when i call my bank, it goes to voice mail. I would like to know if I will be charged 25% of what I saved till now or what exactly does it mean???