The number of people complaining about the fees charged for breaking a fixed term mortgage with their bank has spiked in the wake of falling interest rates.
The Banking Ombudsman scheme said it had received 24 cases relating to early repayment costs since July 1.
That compares to 28 early repayment cases for the whole of the year to June 30.
Mortgage interest rates have fallen rapidly in recent months after the Reserve Bank began cutting the official cash rate in June.
Home-owners can now lock in a mortgage for as low as 4.35 per cent for a year with either ASB bank or the BNZ if they meet special conditions.