The embodiments herein provide a method and system for polling and processing data. The method comprises computing a maximum time from a source after a last update time, waiting for a preset time to ensure that all transactions with respect to a change in a data is completed, querying for a plurality of changes after an elapse of the preset waiting time since the last update time and up to the maximum time, generating a time window, collecting a list of changes occurred within the generated time window, sending the collected list of changes for processing; and updating the processed data at the destination. The time window comprises a time interval between the last update time and the maximum time.