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# Mortgage Calculator Updated - Overpayments
- URL: https://wisener.net/mortgage-calculator-updated-overpayments/
- Published: 2026-05-15T23:00:00.000Z
- Updated: 2026-10-12T18:29:12.000Z
- Description: The mortgage calculator now allows you to add an annual overpayment amount to show how much could be saved over the term and how the term is reduced.
- Author: Lee Wisener
- Tags: calculator, Mortgage, #Import 2026-10-12 18:55

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.

![](https://wisener.net/content/images/wordpress/2026/05/Screenshot-2026-05-16-at-15.01.34_1778940540.png)

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