What’s included · Stamp duty
A stamp duty calculator that is still right next year.
On your own site, included as standard, and maintained by us when the thresholds move — which they do. Most agency calculators were correct on the day they were installed and have been quietly wrong ever since.
The problem with a calculator nobody owns
Thresholds change at budgets, surcharges get added, relief for first-time buyers moves. A calculator built once and forgotten does not fail loudly — it just starts giving people the wrong number.
That is worse than not having one. A buyer who budgets off your figure and finds out from their solicitor that it is three thousand pounds out does not blame the government.
Ours is maintained centrally. When a rate changes we update it once and it changes on every client’s site the same week, which is the same reason everything else on our platform improves for everybody at once.
What it covers
Standard residential rates
The bands as they currently stand, applied properly rather than as a single percentage.
First-time buyer relief
Including the ceiling above which it stops applying, which is where most simple calculators get it wrong.
Additional property surcharge
For second homes and buy-to-let, which matters to a good share of your landlord audience.
On the listing, not just a page
Prefilled with that property’s asking price, so a buyer gets their answer without typing anything.
Mortgage and yield too
Repayment estimates for buyers and rental yield for landlords — see the mortgage calculator.
Properly caveated
An estimate, clearly described as one, pointing at proper advice. Useful without being something anyone can rely on and then complain about.