monthly basis man tingali na. you can go below maintaining balance and won't get any penalty (usually 300-500) basta imo average daily balance moabot at least the minimum amount to keep your account active. (monthly average daily balance--naay formula ana sa ila website)
pero ang question here unsa ang cut-off time or how many hours man dapat naa sa imo account ang money nga ma counted na siya as "1" day. basi gisudlan og 50k pag 2pm unya gi withdraw rpud pag 8pm same-day. hehe
if imo i-withdraw ang 10k nga remaining balance which is also the maintaining balance, mo automatic nana og close (don't know for how long, I guess 1 month) without penalty. Pero, kung imo gidepositoan og 1000 and in-ana rjud nga amount hangtod2x, penaltihan kag 300 (or depende what bank) hangtod mahurot ang 1k and ma automatic closed account nana in time.