Give your clients an instant stamp duty answer without leaving your website. All 8 states and territories, 2026 rates, first home buyer exemptions and concessions applied automatically, plus a full upfront-cost breakdown. Built for AU conveyancers, mortgage brokers, buyers agents and property educators. Free for commercial and non-commercial use with attribution.
Paste this into any HTML block on your site. The calculator renders automatically, mobile-responsive, no setup.
<iframe src="https://nestpath.com.au/embed/stamp-duty-calculator?utm_source=embed&utm_medium=widget" width="100%" height="1450" frameborder="0" loading="lazy" title="Australian Stamp Duty Calculator — by NestPath" style="border:0;max-width:840px;display:block;margin:0 auto;" ></iframe>
Default height 1450px covers the inputs, both result cards and the full cost breakdown. If your page is tight on space, 1100px works with internal scrolling for the breakdown section.
WordPress (with iframe shortcode plugin)
[iframe src="https://nestpath.com.au/embed/stamp-duty-calculator?utm_source=embed&utm_medium=widget" width="100%" height="1450"]
Squarespace, Wix, Webflow, Ghost, Shopify, Notion: use the default iframe HTML above inside an "Embed" or "HTML" block.
Substack: iframes are restricted — instead link to the full NestPath stamp duty calculator.
"How much stamp duty will I pay?" is the first question almost every buyer asks. Answering it on your page keeps the visitor with you instead of sending them to a bank or comparison site — and a buyer who has just seen their upfront costs is exactly the buyer who needs a conveyancer or broker next.
The widget is maintained by NestPath against state revenue office sources, so you never have to update rates on your own site again.
The widget is licensed CC BY 4.0. You can embed it on commercial AND non-commercial sites for free. The only requirement is that the "Stamp Duty Calculator by NestPath" attribution at the bottom of the widget remains visible — please don't modify the iframe contents or strip the attribution.
Disclaimer to include on your site: "This calculator provides general estimates based on published 2026 stamp duty rates and is not financial or legal advice. Confirm exact figures with your conveyancer or the relevant state revenue office."
Does it cost anything?
No. Free for commercial and non-commercial use under CC BY 4.0.
Do I need an API key?
No. The calculator is pure client-side — no backend calls, no rate limits, no key registration.
Will it stay current when rates or thresholds change?
Yes — automatically. The iframe loads the live widget from NestPath, so every update we ship (rate changes, new FHB thresholds, budget changes) flows to every embedded instance immediately.
Can I get a branded or customised version?
For colour/branding variants or per-embed UTM tracking for partner sites, reach out via the NestPath contact page.
Where do the figures come from?
Rates and FHB concession thresholds are encoded from the eight state and territory revenue offices (FY2025-26 scales) and re-verified when states announce changes. Methodology and sources are public on the main calculator page.
Want more free NestPath tools for your site? See the Negative Gearing Grandfathering Checker embed and the canonical AU FHB Facts dataset (CC BY 4.0).