Kiwibank is blaming rising funding costs on its decision to lift mortgage rates twice since the start of the year.
According to interest.co.nz the state-owned bank announced increases to its two, three, four, and five year fixed term rates on both January 9 and again today.
The total increase ranged from 26 basis points to 35 basis points and have pushed its two year fixed term rate up from 4.39 per cent to 4.65 and its five year up from 5.40 per cent to 5.65 per cent.
A spokesman for the bank said today's adjustments were "relatively minor".
"Costs are rising. Not all adjustments are connected to the OCR (official cash rate)."