Another requested update, I have added a new option to the mortgage calculator that allows you to model overpayments.

The way it works is on the assumption that the overpayment is made in a single payment at the end of each year.

Screenshot below.

Apologies for the delays with this one, the maths was hard 😩 And I needed to run a lot of tests to make sure it was correct.

As always, if you find any issues, let me know, I am confident there are none, hence it took so long to implement 😂