I am planning on overpaying my mortgage to reduce the term but am questioning the maths of it all! I have 24 years left on my mortgage (due to finish June 2046). The value of the house currently is 265k, and the mortgage left on it is 188k.
On the standard variable rate I pay 1,064 a month. If I overpay by 1k every month and so pay 2,064 monthly the bank said I'd repay my mortgage by June 2031, so knocking 15 years off my mortgage.
I spoke to my dad about this and he doesn't think this can be right. My plan was to pay in a lump sum of 20k (which knocks off 4 years according to the calculator), then overpay by 1k a month. So in total reducing my mortgage by 19 years from 24 years to 5 years. Have I made a mistake in this?