May 22 (Reuters) - Singapore-based DBS group on Monday said it expects earnings of over S$10 billion ($7.55 billion) in the medium term, after it posted a record first-quarter profit earlier this month.

The group expects a return on equity of between 15% and 17% and common equity tier one ratio to be in the range of 12.5% to 13.5% in the medium term.

($1 = 1.3245 Singapore dollars) (Reporting by Navya Mittal in Bengaluru; Editing by Sonia Cheema)