FISERV INC revenue for the last year amounted to 306.43 B MXN, the most of which — 138.12 B MXN — came from its highest performing source at the moment, Acceptance, the year earlier bringing 142.23 B MXN. The greatest contribution to the revenue figure was made by United States — last year it brought FISERV INC 275.65 B MXN, and the year before that — 297.52 B MXN.