A method includes determining by a computing system a plurality of automated clearing house (ACH) data conversion rules and converting ACH data into converted ACH data according to the determined ACH data conversion rules. Each of the plurality of ACH data conversion rules includes a name associated with a source data field, a name associated with a target data field, and an instruction indicating how to convert ACH data in the source data field into converted ACH data to be stored in the target data field.