I was about 27 when I joined a company that paid me >RM10k/mth (before tax and other deductions). It was a local investment bank to be exact. Before that, I was earning around RM6.5k/mth, also in the financial line. So, earning >RM5k/mth at age 25-28 is definitely possible in Malaysia, but depends on your qualifications, and what industry you're in.