HMRC Regulatory Update: From May 2026, conveyancers filing SDLT returns must register as tax advisers.
SDLT Calculations You Can Rely On
Backed by Indemnity
SDLT Check helps conveyancers achieve accurate figures with confidence. Every calculation is supported by £5M professional indemnity—so in the unlikely event of an error, costs are covered by us rather than your PI insurance.
SDLT Is Complex. Getting It Right Matters.
With 49 different SDLT reliefs and ongoing regulatory changes, conveyancers face a demanding environment. Mixed-use treatment, non-residential rates, and client-side scrutiny mean that accuracy is essential—and the consequences of error can be significant.
A single miscalculation can lead to substantial PI claims, defence costs, and premium increases—often in the region of £30,000 or more—as well as reputational impact that insurance cannot address.
The HMRC calculator dates from 2003 and does not reflect many of the reliefs in use today. Conveyancers need tools that keep pace with current legislation and guidance.
What is SDLT Check?
SDLT Check is a legal technology platform that combines intelligent algorithms, legislative modelling, and specialist tax expertise to analyse property transactions and calculate SDLT accurately.
The system reviews transaction data against current legislation, HMRC guidance, and complex rule interactions to help firms reduce risk and evidence compliance.
Industry Context
of SDLT returns contain errors—including those prepared by experienced practitioners
in SDLT overpaid annually due to complexity and missed reliefs
of PI notifications in conveyancing relate to SDLT—the leading risk area
Accuracy and Protection, Built In
Calculations are backed by our full indemnity. Reliefs are considered automatically, and audit trails are prepared to support CQS requirements. A structured approach to SDLT compliance.
Full Indemnity Coverage
Our commitment to accuracy is backed by £5M professional indemnity. If a calculation we provide were ever incorrect, we would cover your PI excess, HMRC penalties, and defence costs—so your firm is not left out of pocket.
See the Indemnity in Action →All Reliefs. Automatically.
Mixed-use, non-residential rates, non-resident surcharges, linked transactions—the system considers the full range of scenarios and reliefs, helping to reduce the risk of oversight.
CQS-Ready Audit Trail
Each calculation is documented with legislative references, reliefs considered, and methodology—supporting CQS audits and client enquiries with clear evidence.
Transparent Methodology
The calculation approach is visible—with references to relevant Finance Act provisions. When clients or their advisers have questions, the methodology can be shared with confidence.
Real-Time Regulatory Updates
Finance Act and HMRC guidance changes are incorporated as they are published, so the tool stays current without manual research.
Expert Support Available
For unusual or complex cases, our tax specialists provide guidance—and an indemnified answer you can rely on.
Indemnity That Covers the Details
Where other tools provide figures only, we combine accuracy with protection. Our indemnity addresses the financial impact of a calculation error—so the risk sits with us, not with your practice.
What's Covered:
From Transaction to Confident Submission
Send the Invite
Send the questionnaire to your client in seconds. They complete plain-English questions about the transaction—no SDLT expertise required.
Instant Calculation or Specialist Review
Once the questionnaire is complete, the system either returns an instant calculation (standard cases) or flags the case for specialist review (non-standard). Most cases are resolved within minutes; more complex ones within 24–48 hours.
Review the Methodology
Review how each figure was calculated, with legislative references—useful for client queries and CQS audits.
Submit and Evidence the Filing
Submit the SDLT return directly through the platform, while automatically generating a full audit trail of the calculation and advice for your file and compliance requirements.
Book Your DemoFrom Firms Like Yours
Real reviews from Trustpilot
"SDLT Check has been great for us and our clients. It has taken the risk away from the firm having to calculate the liability and given clients a platform to answer the questions with detailed assistance knowing help is only at the end of the phone. The smart questions also help greatly as it means clients only need to answer questions which are relevant."
"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. No complaints and would highly recommend this product! Very friendly and supportive staff, always there to assist when needed in no time!"
"Set up was easy and our clients are happy with the simple interface. Very helpful for shared ownership in particular and when asking a general question."
For Every Conveyancing Practice
Solo Practitioners
Where a second sign-off is not available, the tool provides expert-level validation that supports CQS requirements—and indemnity that protects the practitioner.
Learn more →Small & Mid-Sized Firms
Standardise SDLT processes across the team, reduce inconsistency, and demonstrate robust risk management to insurers.
Learn more →Larger Practices
Volume pricing, strong security, and audit trails that support compliance at scale. CMS integration available via our API.
Learn more →Ready to See How It Works?
Request a personalised demo. Bring a complex transaction and we can walk through how SDLT Check would handle it.