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Kestero

Mortgage repayment calculator for Wix

Purchase price, deposit, rate and term — and the monthly figure.

Make one, freeOpens the editor with this one in it. No account needed to start.
yourshop.example

Putting it on Wix

Your widget gives you one line of HTML. It goes in once for the whole site, not once per page, and it does nothing until the trigger you chose fires.

Where the box is
Settings → Custom code → add code to Body – end, applied to all pages, and set it to load once.
What catches people out
Check that it is set to all pages and to load once rather than on every page load. Wix defaults these in ways that will either put the widget on one page only or boot it repeatedly as somebody navigates.
<script src="https://kestero.com/widget.js" async
  data-api="https://kestero.com"
  data-key="ke_your_key"
  data-widget="your-widget-id"></script>

The key and the id above are placeholders — copy the real line from your widget’s page.

Every platform, and frameworks — including Google Tag Manager, React and Next.js.

What it is for

Putting a repayment figure on a property listing or a broker's page, where that number is the thing somebody came to find out. It opens on a typical purchase and recalculates as the numbers are changed, so a visitor sees a plausible answer before touching anything.

When to show it

Part-way down a listing rather than on arrival. Somebody who has scrolled past the photographs has told you which property they are pricing, which a timer cannot. This preset uses a scroll trigger for exactly that reason. The opening numbers matter more here than in most widgets, too: plenty of people never touch a field, so whatever it starts on is the figure they take away.

When not to use one

Do not present it as advice. It is an illustration built from four numbers, and it knows nothing about fees, insurance, a rate that changes after two years, or the person using it. Say that beside it. In the UK, giving regulated mortgage advice is a permission you either hold or you do not, and putting a calculator on a page does not change which.

Questions

Can I change how the figure is worked out?
Yes. The formulas are yours — the preset is a starting point, and every number feeding it is a field you can rename, remove or add to.
Can I include fees or insurance?
Yes, by adding the field and putting it in the formula. Nothing about the preset is fixed once it is in your editor.
Is anything somebody types sent to you?
No. It is worked out in their browser and stays there unless the widget also asks them to send it, which this one does not.
Is this financial advice?
No, and it should not be presented as any. It is an illustration of one arithmetic result, and what you write around it is your responsibility.

Mortgage repayment calculator on other platforms

Mortgage repayment calculator, on any site or all templates.