Mortgage Overpayment Calculator

Shows how overpayments cut mortgage term and interest, charted with D3.

Artifact by Paul Houghton

IndexedMIT★ 318CalculatorsNo sign-up

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Opens paulhoughton.github.io in a new tab. Nothing to install.

Open Mortgage Overpayment Calculator Source code

You provide: Balance, rate, term, overpayment
You get: Time and interest saved
Account: No sign-up needed
AI: No AI: a plain tool
Your input: Not stated: check the tool's privacy notes before using private data
Price: Free to use
Made with: Open-source web app
Source: Open source
Link check: Answered on Oct 31, 2026

About

Mortgage Overpayment Calculator is an open-source web app in the calculators category (mortgage overpayment). It opens in your browser, so there is nothing to install. You provide balance, rate, term, overpayment and get time and interest saved. It needs no account. It is a plain tool: no AI model is involved. The source code is public on GitHub (paulhoughton/mortgage).

Category: Calculators · mortgage overpayment

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Signals

Stars: 318

Details

Auth: No auth
License: MIT
Repository: github.com/paulhoughton/mortgage
Website: paulhoughton.github.io/mortgage/
First seen: Oct 31, 2026
Last checked: Oct 31, 2026
Source: GitHub

Cite this page

Mortgage Overpayment Calculator: free online. Agent Mart. https://agentmart.dev/artifacts/mortgage-overpayment-calculator (last updated 2026-10-31)