Embed the Rebate or Low APR Calculator
A dealer offers a rebate or a subsidised rate, never both. This compares the two deals over the same term and says which costs less, and by how much. Set the values it should open on, then copy the iframe. Your visitors can change them; the widget recomputes against Rule Calculator and never touches your page.
Opening values
Set what the widget shows before anyone touches it. Leave a field as it is and it stays out of the URL.
Preview
Paste this
<iframe src="https://rulecalculators.com/embed/cash-back-vs-low-interest" width="100%" height="1040" style="border:1px solid #e5e5e5;border-radius:12px" loading="lazy" title="Rebate or Low APR Calculator"></iframe>
<p style="font:13px/1.5 system-ui,sans-serif;color:#666;margin:6px 0 0"><a href="https://rulecalculators.com/calc/cash-back-vs-low-interest" style="color:#666">Rebate or Low APR Calculator</a> by <a href="https://rulecalculators.com" style="color:#666">Rule Calculator</a></p>Free for commercial use. The one condition is the credit link inside the widget, which is how the calculator stays free. Want the numbers in your own markup instead? The same calculator is a JSON endpoint, or see the full Rebate or Low APR Calculator page with its sources and working.