The present invention provides systems and methods for customizing fixed rate and variable rate mortgages. In some cases, the methods include accessing mortgage information and identifying at least a first characteristic of the mortgage to be modified. In addition, a first funds transfer is authorized to facilitate modification of the first characteristic. The mortgage is also monitored and changes in any relevant characteristics are identified. Where changes in a second relevant characteristic is detected, a second funds transfer is authorized to facilitate modification of the first characteristic to compensate for the change in the second characteristic.