The mortgage rate war is heating up ahead of a widely expected official cash rate cut on Thursday, with ASB matching the 4.35 per cent special one-year rate BNZ unveiled last week.
It is the lowest home loan rate New Zealand has seen since the 1960s.
Borrowers wanting to access ASB's 4.35 per cent special must have at least 20 per cent equity.
With the economic outlook darkening, a 25 basis point OCR cut, to 2.75 per cent, is expected from the Reserve Bank this week.
Some economists are picking the OCR to fall as low as 2 per cent.