A flat in Greece
One buyer owns a small share abroad. Its value decides the bill.
£0
gap between low and high
Low £20,000High £50,000
Stamp duty triage
Know the stamp duty. Keep the proof.
Client-led stamp duty triage for conveyancers and mortgage brokers. Your client answers on their phone, complex cases are flagged, and every answer lands on your file.
Your firmStep 1 of 3
Do you own any other property, anywhere in the world?
Yes
No
Not sure
About 20 questions, answered on your own phone.
Your firmStep 2 of 3
Is your share worth more than £40,000?
Yes
No
Not sure
Not sure is a fine answer. We won't guess.
Your firmStep 3 of 3
Checking your answers
This takes a few seconds.
Your firmYour result
Two scenarios
£20,000 – £50,000
Your share abroad decides which applies.
LowHigh
✓
Saved to your file
A previous home not yet soldA share in a property abroadA separation without a court orderAn inherited shareAn annexeA buyer who has lived abroadA company buying a houseStaircasingMixed use
Who it's for
Built for the two people who see the bill first.
46% of purchases checked in 2026 weren't standard. A calculator can't tell you which.
A previous home not yet soldA share in a property abroadA separation without a court orderAn inherited shareAn annexeA buyer who has lived abroad
Non-standard means something in the client's answers makes the stamp duty uncertain. A calculator takes a price and gives one number. It never asks the questions that change the bill.
Stamp.Expert data for checks completed in 2026, up to November 2026.
Non-standardStandard
How it works
From link to result. In the client's hands.
No tax questions from your team, no figure typed up from a phone call.
- 1
Send a link
From your case management system, CRM or the dashboard, in your firm's name.
- 2
The client answers
About 20 yes-or-no questions on their own phone. Never more than 30.
- 3
Standard or a range
One figure, or a low and a high figure with the reason.
- 4
The record lands
The same timestamped PDF goes to the client and your file.
Messagesnow
Your firm
Please check your stamp duty before we go further. It takes about 5 minutes.
Please check your stamp duty before we go further. It takes about 5 minutes.
Start my Stamp check →
Your firmQuestion 7
Will you sell your current home before you buy this one?
Yes
No
Not sure
Your firmYour result
Non-standard
Low and high
Your previous home isn't sold yet, so two outcomes are possible.
LowHigh
Your firmDone
✓
Record saved
The same timestamped PDF has gone to you and to your firm.
Stamp in 2026
Fast for the client. Thorough for the file.
£0m+
of stamp duty checked through Stamp in 2026*
2 in 3
clients complete their check within 24 hours of getting the link*
1 in 4
checks happen in the evening or at the weekend, when the client has time*
*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.
What each side gets
One link. Two problems solved.
For conveyancers
The client's answers, not your notes.
- Every question, answer and timestamp on the matter
- Complex cases flagged in week one
- Fee-earners stop asking tax questions
For mortgage brokers
The bill, before the recommendation.
- Deposit and loan-to-value planned once
- A record for your Consumer Duty file
- No tax advice from you, so no advice drift
Real cases
See all six cases →
Real purchases. Real gaps.
Her home, his buy-to-let
The replacement-home test applies to each buyer separately.
£0
gap between low and high
Low £53,750High £108,750
A company buying a house
Letting to a connected person can lose the relief.
£0
gap between low and high
Low £101,250High £178,500
From Stamp's case files. Names, firms and dates removed.
Independent by design
We have no tax advisers. That is the point.
When a case is non-standard, the client chooses an independent tax firm from our panel, or their own adviser. Nothing is sold to your client, and you refer nobody.
The adviser panel →
Why now
Why it matters more now.
18 May 2026
Firms are tax advisers now
Firms filing stamp duty returns must register with HMRC.
Year to April 2025
Investigations up 88%
HMRC opened 3,035 stamp duty investigations.
Since 31 Oct 2024
3% became 5%
The higher rate now costs two-thirds more to miss.
Sources: HMRC; investigation figures as reported by Today's Conveyancer, March 2026.
Works with your systems
Case management, CRM or the dashboard.
Free to deploy
No set-up fee. No subscription.
Same record, every file
One timestamped PDF per purchase.
Stamp reduces your risk. It does not pretend to remove it.
No tool takes away a professional's duties. Stamp moves the questions to the person who knows the answers, finds the cases that need a specialist, and leaves you a record of both.
Book a demo
See it on a real case. Book a demo.
A short call: the client journey, a standard and a non-standard result, and the record your file receives.
- No set-up fee
- No subscription
- Works with your systems