Hi TS..i personally think that you are grossly underpaid. Experience aside, remuneration package also depends on your qualifications and the size of the company.

I have a B.Eng, been a PM for about 10yrs and avrg performer.. Currently working for a listed sg company, annual salary is about 108k(7k + 700 transport allowance + 200 HP allowance + min 2 month bonus).

On the other hand, i know of peers working for SMEs whom has only O levels, but possess numerous industrial certification with about 25yrs+ of exp drawing only 6k mthly with no allowance..