Interest determination system and method

An interest determination system that performs daily calculation of account interest with a single monthly processing of client charges, the system comprising:

• at least one processor configured to calculate daily account interest based on interest rate data and an account balance for each particular day in response to instructions provided by at least one user;
• at least one memory device coupled to the processor and configured to store and provide access to instructions dictating at least some part of operation of the system;
• at least one system interface coupled to the processor and configured to receive data for use in calculating account interest and transmit calculated account interest data to other systems;
• and
• at least one user interface coupled to the processor, including at least one graphical user interface and configured to receive the instructions from the at least one user and output interest rate data and account interest data to the at least one user;
• wherein the at least one processor is configured to control operation control at least some part of operation of the at least one system interface and the at least one user interface based on instructions stored in the at least one memory device.