For real-estate sites, builders, finance blogs

Embed the stamp duty calculator

Two ways: drop in an iframe for the full UI, or call the JSON API and render results yourself. Both free, both no-signup.

Option 1

Drop-in iframe

Paste this in a WordPress custom-HTML block, Webflow embed, Wix HTML widget, or any blog editor that accepts an iframe.

<iframe
  src="https://stampduty.krakelabsindia.com/?embed=1"
  width="100%"
  height="780"
  style="border:0;border-radius:12px"
  loading="lazy"
  title="Stamp Duty Calculator"
></iframe>

The page renders the full state-picker → deed-picker → value flow. Visitors get the same calculator they would see on our site.

Option 2

JSON API

Render your own UI and call our public POST endpoint. CORS is open; no API key required.

<script>
fetch('https://stampduty.krakelabsindia.com/api/calculate', {
  method: 'POST',
  headers: { 'content-type': 'application/json' },
  body: JSON.stringify({
    state: 'MH',
    deedType: 'sale',
    consideration: 8500000,
    isWomanBuyer: true,
    cityTier: 'metro',
  }),
})
  .then(r => r.json())
  .then(d => {
    document.getElementById('total').textContent =
      '₹ ' + d.total.toLocaleString('en-IN');
  });
</script>

See the full API surface on the developers page.

FAQ

Is it really free?

Yes. No payment, no API key, no signup. You keep the “Powered by Stamp Duty Calculator” link visible — that's the deal.

Are the rates accurate?

We curate from each state's Inspector General of Registration (IGR) for FY 2025-26 and link the source on every result. But rates change. Always verify with the local Sub- Registrar Office before paying. We surface honesty notes for anything we couldn't verify cleanly.

What about local cess / lawyer / broker fees?

Not included. The calculator covers stamp duty + registration fee only — the two state-level levies. Add ~₹50K-₹2L for lawyer, ~1-2% for broker, and city-corporation cess on top where applicable.

Ready to embed?

Copy the iframe snippet above and paste it on any page.

<iframe
  src="https://stampduty.krakelabsindia.com/?embed=1"
  width="100%"
  height="780"
  style="border:0;border-radius:12px"
  loading="lazy"
  title="Stamp Duty Calculator"
></iframe>