SISB PCL revenue for the last year amounted to 1.89 B THB, the most of which — 1.88 B THB — came from its highest performing source at the moment, Tuition Fees and Service, the year earlier bringing 1.31 B THB. The greatest contribution to the revenue figure was made by Thailand — last year it brought SISB PCL 1.93 B THB, and the year before that — 1.34 B THB.