In May 2026, the Finance Bill officially reclassifies the submission of an SDLT return as "regulated tax advice."
Ring-fence your firm’s PI insurance, satisfy CQS 1.2a, and transfer 100% of your SDLT liability to an independent, insured panel.
Most firms drastically underestimate their exposure to SDLT errors. Our platform data proves that 53% of all residential property transactions contain hidden tax complexities that generic calculators miss.
Based on our analysis of high/low-risk non-standard calculations, the average value of a missed SDLT complexity is £16,360. Relying on fee-earners to manually spot these cases without an algorithmic safety net is a catastrophic financial risk.
Use the calculator to reveal the true scale of the un-invoiced liability sitting on your balance sheet right now.
Better calculators don't stop liability. Structural transfer does.Many firms believe that upgrading to a slightly better internal calculator protects them. It doesn't. If your fee-earner is still manually keying in the client's data, and your firm is still physically clicking "submit" on the HMRC portal, you legally own 100% of the tax advice liability.
Stamp engineers a complete liability transfer through client-led data entry and an integrated, £2M+ insured specialist panel that takes the legal responsibility off your desk.