How we work

Every rate in our calculators comes from the authority that sets it, and every result shows its workings.

Our rules

Stamp Duty Land Tax rates come from HMRC on GOV.UK, LBTT from Revenue Scotland, Land Transaction Tax from the Welsh Revenue Authority and registration fees from HM Land Registry. We do not copy a figure from another website. Each figure is recorded with its source and the date we checked it, and the site will not build if one is missing. You can see them all.

Our calculators give information, not advice. They work from what you enter and cannot know everything about your purchase.

How we test the sums

The tax authorities publish worked examples, and our sums must give the same answers before any change goes live: HMRC's examples for a home mover, a first-time buyer and an additional property; Revenue Scotland's for three prices; and the Welsh Revenue Authority's for the main and higher rates. Tax is rounded down to the pound, as the authorities do.

When rates change

Rates change at Budgets and on set dates. We add new rates beside the old ones with the date they start, so the calculators switch over on the right day.

Corrections

We have not had to correct any figure yet. If you spot a mistake, email max@youellsystems.co.uk.