ABN used to offer a monthly rest loan package. not sure if they still have it now. monthly rest package usually carries a higher interest rate compared to flat rate package.
however, for flat rate package, the rate that we are paying is not the flat rate interest. e.g a 2.5% p.a. flat rate package, the effective rate tat u are paying will actually be abt 4%+. it will not differ much from a monthly rest basis package. not too much savings for taking a monthly rest package. tat could also be the reason why banks are not offering such package.