Embed code · widget · Taxes
Embed the Late Payment Interest Calculator on your site
Add the Late Payment Interest Calculator to any page. Copy the code below — it auto-resizes and follows your site theme.
Preview
Theme
<div class="calcro-widget" data-tool="tax-late-fee" data-locale="en" data-theme="auto">
<a href="https://calcula.live/en/late-payment-interest">Late Payment Interest Calculator — calcula·live</a>
</div>
<script async src="https://calcula.live/widget.js"></script>iAbout this calculator
Estimate the interest on overdue tax from the amount owed and a monthly rate. HMRC late-payment interest is 7.75% a year (base rate + 4%), about 0.65% a month.
?Frequently asked questions
Is it free?
Yes. No account and no impression limit.
Can I embed the Late Payment Interest Calculator on WordPress or another CMS?
Yes. It works anywhere you can paste HTML — WordPress, Wix, Webflow or plain HTML.
Will it slow my site down?
No. The widget lazy-loads inside an isolated iframe and only runs when it becomes visible.
Is it mobile-friendly?
Yes. It fills the container width: side-by-side on wide screens, stacked on mobile.