Note that the NIB rates work in a different way:
A margin of 0.50% is applied to the first portion of the loan up to 50% LTV
A margin of 0.60% is applied to the next portion of the loan up to 60% LTV
A margin of 0.80% is applied to the final portion of the loan up to 80% LTV.
So, for a person with a LTV of 80%, they would still be better off with NIB, as the AIB margin of .75% for this LTV applies to the entire amount.
A margin of 0.50% is applied to the first portion of the loan up to 50% LTV
A margin of 0.60% is applied to the next portion of the loan up to 60% LTV
A margin of 0.80% is applied to the final portion of the loan up to 80% LTV.
So, for a person with a LTV of 80%, they would still be better off with NIB, as the AIB margin of .75% for this LTV applies to the entire amount.