How our guides are written

Who publishes the site, why pages carry the site name as author, and how pages are drafted, checked and corrected.

Who is behind the byline

Stamp Duty Calculator is published by POW XD Ltd, a company registered in the United Kingdom. Pages carry the site name, "Stamp Duty Calculator", as author. There is no named author, editor or expert reviewer, and we do not invent one.

Our guides are drafted with AI assistance and checked against official sources (GOV.UK, HMRC, HM Land Registry, Revenue Scotland, the Welsh Revenue Authority and legislation.gov.uk) before publishing. Figures are reviewed on the date shown on each page. This is general information, not legal, tax or financial advice.

We would rather be clear than impressive: the site is not written or reviewed by a solicitor, licensed conveyancer, chartered tax adviser, accountant or FCA-authorised adviser, and we don't claim those qualifications. What we offer instead is transparent working. Every rate links to its primary source, every worked example can be reproduced in the calculator, and the calculation engines are covered by automated tests.

What we cover

UK Stamp Duty Land Tax (SDLT) for England and Northern Ireland; Land and Buildings Transaction Tax (LBTT) for Scotland; Land Transaction Tax (LTT) for Wales; additional-property and non-UK-resident surcharges; first-time buyer relief; mortgage affordability and stress testing; UK conveyancing process and fees; leasehold and freehold ownership; buy-to-let taxation and mortgages; and second-home rules.

Editorial process

Every published page on this site follows the same five-step process:

  1. Research. Primary sources only — HMRC, GOV.UK, the FCA, Bank of England, Revenue Scotland, Welsh Revenue Authority, the Law Society, the SRA, the CLC, the Property Ombudsman.
  2. Drafting. Pages are drafted or updated with AI assistance (Claude, an AI model made by Anthropic). Nothing is copied from other calculators or aggregator sites.
  3. Fact check. Every rate, threshold, worked calculation and cited fact is verified against the primary source listed in the page's "Sources" section.
  4. Calculation check. Worked examples are recomputed with the site's own engine, and figures quoted in guides are covered by automated tests. Each page shows a "Last reviewed" date.
  5. Ongoing maintenance. Every page is re-reviewed at least annually and after every UK Budget or Spring Statement. Rate changes trigger same-week updates.

Our full editorial standards, correction policy and independence statement are on the editorial standards page.

Fact-checking commitment

Every rate, band, threshold, deadline and cited fact in our content is checked against a primary UK government or regulator source before publication. We do not rely on secondary aggregators for tax or regulatory figures. Where a figure is an estimate (typical market rates, average processing times, etc.), we state clearly that it is an estimate and cite the underlying data source.

We do not publish figures without a citable source. If a commonly-quoted number cannot be traced to a primary source we've verified, we either omit it or flag it as anecdotal rather than authoritative.

Editorial independence

The site operates independently of any commercial arrangements. Advertisers, affiliate partners, and sponsors do not influence which topics we cover, which tools we build, or which conclusions we draw. Where a page contains an affiliate recommendation, it is clearly labelled "(Sponsored)" and carries the standard rel="sponsored" attribute.

Our full editorial independence policy is on the editorial standards page. Our affiliate disclosure is in the terms & disclaimer.

Corrections

Spot an error? Email seo@powxd.co.uk with the URL of the page and the specific issue. We investigate every correction within 5 UK working days. If a correction is warranted, we update the page, refresh the "Last reviewed" date, and record material changes in the corrections log.

Get in touch

For editorial enquiries, feedback, or partnership discussions, please visit the contact page or email seo@powxd.co.uk. We aim to respond to every genuine enquiry within 5 UK working days.