A couple separating
Without a court order or formal agreement, the mortgage taken on counts as payment.
£0
gap between low and high
Low £0High £55,000
For conveyancers
You file the return. Who typed the answers?
Stamp moves the stamp duty questions from your fee-earner to your client. Every purchase file gets their own answers, timestamped, and the complex ones are flagged before exchange.
Stamp.Expert record12 Oct 2026, 14:32
Own any other property, anywhere?Yes
Share worth more than £40,000?Not sure
Result£20,000 to £50,000
Client's choiceIndependent advice
✓ Saved to the matter
0%
of purchases checked in 2026 were non-standard, so nearly half needed a closer look*
£0k
median gap between the best and worst case on a non-standard purchase*
2 in 3
clients complete their check within 24 hours of getting the link*
*Stamp.Expert data for checks completed in 2026, up to November 2026. Non-standard means something in the client's answers makes the stamp duty uncertain. Best and worst cases are the two ends of the range shown to the client; the amount actually due depends on the facts and, for non-standard purchases, on advice from a tax adviser. Stamp.Expert does not give tax advice.
Since 18 May 2026
You're a tax adviser now. Outsourcing doesn't change that.
- Firms filing stamp duty returns must register with HMRC.
- The Law Society says firms are "likely to retain ultimate responsibility for submitting SDLT returns".
- "We do not give tax advice" is harder to rely on.
HMRC; Law Society Q&A on tax adviser registration.
The typing risk
The risk is in the typing. Not the arithmetic.
Most firms still produce the figure the old way: a fee-earner asks a few questions on the phone, types the answers into a calculator and gets one number. No range, and no record of what was asked.
✗ Calculating the tax
- The fee-earner interprets spoken answers
- One figure, presented as the answer
- Complications found by luck
- Little or nothing on the file
- The firm picks the figure
✓ Client-led triage with Stamp
- The client answers written questions
- A range and the reason when it is not simple
- Found by the questions, on every purchase
- Every question, answer and timestamp
- The client chooses an independent tax firm
The file
If HMRC asks how you got the figure, it's already on the file.
- Every question asked
- Every answer, given by the client, not typed up by you
- The result, or the range and the reason
- The client's decision on advice
- A timestamp
One PDF to the client. The same PDF to your matter.
HMRC scrutiny
HMRC is looking harder. Files need to stand up.
Your file, on request
File access notices
HMRC can ask for working papers where it has reasonable suspicion.
Up to £3,000 each
Inaccuracy
Per inaccuracy in a return filed for a client.
£7,500 to £1 million
Sanctionable conduct
Requires intent, with publication above £7,500.
HMRC. Stamp duty investigations rose 88% to 3,035 in the year to April 2025, as reported by Today's Conveyancer.
Conveyancing Association, March 2026
The industry asked for this.
A standard stamp duty questionnaire, with "a clear requirement for independent tax advice in genuinely complex cases". Stamp already works this way.
Stamp is not endorsed by the Conveyancing Association.
Cases
See all six cases →
Three files. Three gaps a calculator would hide.
Staircasing
The election made on the first share decides what is due now.
£0
gap between low and high
Low £0High £22,000
Mixed use
Whether it truly qualifies is a question of fact HMRC will test.
£0
gap between low and high
Low £9,250High £50,500
What changes for your firm
Less asking. More evidence.
No tax questions
Fee-earners send a link instead.
The same record
On every purchase, for audits, insurers and complaints.
Week one, not week eight
Complex cases surface at the start of the matter.
No conflict
No in-house advisers. The client chooses.
It works best as policy. Every purchase, every client.
One click
From your case management system.
Free to deploy
No set-up fee. No subscription.
Set up with compliance
We help your COLP make it standard.
Questions
Questions conveyancers ask.
We're still responsible. So what changes?
The file. The facts came from the client, in writing, timestamped, and complex cases were flagged before you filed.
Isn't this tax advice by the back door?
No. Stamp sorts cases and shows a range. An independent tax firm the client chooses gives any advice.
Will clients answer correctly?
They answer about themselves, in plain English. An unsure answer is treated as non-standard, not guessed.
Does it work with our case management system?
Stamp works with leading conveyancing systems and has an API. The dashboard works on day one.
Who pays?
No set-up fee and no subscription. We'll take you through the model on a call.
Book a demo
Ask for it in the form and we'll send it over.
See the record your file would hold. Book a demo.
A short call with the client journey, both results and the PDF your matter receives.
- No set-up fee
- No subscription
- Works with your systems
Ask for it in the form and we'll send it over.