The present invention relates to a method and a system to automate identification of transactions. The method comprises receiving raw log files from a transaction device into a log collector, storing the raw log files to a log storage, processing the raw log files by a log parser unit to remove the fields and the entries of the raw log files that are not relevant for the transaction identification analysis, identifying of at least one session of at least one user by clustering the processed one or more entries from a single user session using at least one session identifier unit, identifying at least one user path that is followed by at least one user during a single user session, identifying at least one entry point from the identified single user path and determining at least one transaction and at least one sub transaction from the identified entry point.