The system works like this. When you open an account with us, you have to pay us one whole year in advance. But after that, you may pay in any term you like. Say suppose after one year of buying your account with us, besides paying one whole year again, you may wish to pay for only a month or another 2 years. It is up to you. The goal is to keep your account active by having enough funds in it at all times. You can read Hosting FAQ for more.