Ah, I see now.
So, effectively there is a sliding scale of fees based on the 1% commision refund ?
For example, a 150k mortgage would cost net 2,063-45 because refund is 500 less than on a 200k mortgage ?
By comparison Prima Finance buy/sell is 499+VAT/800+VAT (ie total 1,571 incl VAT) regardless of mortgage amount.
For 150k mortgage, PrimaF fee is 1,571 - REA is 2,063 (all VAT inclusive)
For 200k mortgage PrimaF fee is 1,571 - REA is 1,563 (all VAT inclusive)
So, use REA for mortgages of 200k and above, PrimaF for less than 200k.
(Assuming service etc ... is of equal quality, of course !)