Tax advisors spending hours untangling SDLT errors that had already been submitted. Seeing the same reliefs missed, the same errors repeated — and the impact on practices, PI exposure, and client outcomes.
As tax specialists with decades of experience in property taxation, we spent years reviewing SDLT calculations after they had been submitted. The pattern was always the same.
A conveyancer had done their best with a complex transaction — maybe a property with an annexe, a mixed-use building, a non-resident buyer. They had used the HMRC calculator, double-checked the figures, and submitted the return. Then, months later, the client's accountant would call. Or HMRC would query. Or a reclaim opportunity emerged that had been missed.
The conveyancer was not incompetent. They were under time pressure, working with inadequate tools, navigating 49 different reliefs that change constantly. The client was £8,000, £15,000, sometimes £30,000 worse off. The conveyancer was facing a PI claim, premium increases, and the professional consequences of an error on their record.
Conveyancers are not SDLT specialists — they are property lawyers handling complex legal transactions under pressure. Tax advisors are SDLT specialists. We spend our professional lives understanding the nuances, the reliefs, the edge cases, the tribunal decisions.
So we asked: what if we could put our 50+ years of combined SDLT expertise into a tool that conveyancers could use on every transaction — and stand behind our methodology with real liability? That is SDLT Check.
SDLT Check was not built by software developers who consulted some solicitors. It was built by tax specialists who have spent decades in property taxation. When you use SDLT Check, you are getting our expertise — not an algorithm's best guess.
Anyone can claim accuracy. We back ours with £5,000,000 professional indemnity on every calculation. If SDLT Check produces an incorrect figure and your firm incurs costs as a direct result, we cover those costs up to our policy limits. We can offer this because we have validated our methodology against 50,000+ historical SDLT returns.
We have worked with conveyancing firms for years. We understand CQS requirements, PI pressure, and what happens when errors surface 18 months after completion. SDLT Check is designed for how you actually work.
The tax specialists and SDLT experts behind SDLT Check.
We will never release a calculation methodology we are not confident enough to indemnify. Our £5M coverage is accountability, not marketing.
We show our working on every calculation. No black boxes. You can see exactly how we reached every number and defend it to clients, accountants, or HMRC.
"Great Product — Easy to use. Our firm has had a brilliant experience using SDLT Check. It is straightforward, quick, well priced and reliable. Works great for professionals and individuals."
— Ifrah, Law Firm Trustpilot
Book a short demo to see how SDLT Check helps firms reduce SDLT risk.
