Bonus savings are offered by many financial institutions, which are savings accounts comprising bonus interest rates. They are designed to encourage saving by enticing you with bonuses when you adhere to particular conditions. Some bonus savers have very complicated interest rate structures and change after different periods of time. For instance a bonus saver could offer one particular fixed interest rate and another variable rate on top but both could incur several different conditions. These conditions could be a certain amount of money deposited into the account at regular intervals or a limited number of withdrawals.