In any circumstance, i think, the insurer would prefer to pay in arrear. As in the case of a whole life annuity, the value of annuity due is always greater than annuity arrear (at a particular age).
This is because of added factor, ie the probabity of survival.
Annuity due has one payment assured whereas arrear does not
I am not sure of my ans though. If i am wrong , do correct me
Sent from my iPhone using Tapatalk