SCA Tax Launches Post Complete: A New Platform for Stamp Duty Calculations

SCA Tax has launched Post Complete, a new platform built to help professionals deal with stamp duty calculations at a time when the rules, the risk and the expectations around compliance are all increasing.

Stamp duty has always been technical, but it has become noticeably harder to deal with in recent years. Rates and surcharges interact in more complex ways, buyer circumstances matter more than they used to, and the tax position can change late in a transaction.

At the same time, HMRC has made it clear that submitting SDLT returns is being treated as tax advice. That has real implications for the professionals involved in property transactions.

Post Complete has been built with that reality in mind.

Why we built Post Complete

At SCA Tax, we work with stamp duty every day. We see where things go wrong, often not because people are careless, but because the legislation is complex and the tools being used don’t reflect how transactions actually work.

We’ve seen situations where assumptions are made too early, where buyer circumstances change part-way through a transaction, or where the responsibility for the tax position isn’t as clear as it should be.

Over time, it became obvious that many firms were relying on calculators and processes that no longer match the complexity of modern stamp duty.

Post Complete is our response to that.

It’s a dedicated platform for SDLT, LBTT and LTT, built around current legislation in England, Scotland and Wales, and designed for professional use rather than rough estimates.

What Post Complete is designed to help with

Stamp duty calculations are rarely static. Transactions evolve. Circumstances change. What looked straightforward at the start of a deal can look very different by the time it completes.

Post Complete is designed to handle that kind of complexity.

Instead of assuming every transaction fits a standard template, the platform supports more detailed assessments and provides clear, structured calculations that reflect the position at the point they are needed.

The aim isn’t to replace professional judgement. It’s to give professionals better information, earlier, so decisions are made with more confidence.

Who Post Complete is for

Post Complete has been built for professionals who are involved in property transactions and need certainty around stamp duty calculations.

That includes solicitors and licensed conveyancers, as well as other property professionals who need to understand the tax position as part of a transaction.

For conveyancers in particular, the platform is designed to support the increasing responsibility attached to SDLT submissions, especially as they are now being treated as tax advice rather than a purely administrative step.

Built from real-world experience

Post Complete has been developed by the team behind SCA Tax, based on years of specialist stamp tax advisory work.

Every part of the platform reflects issues we see in real transactions, from surcharge questions to changes in buyer circumstances and increasing scrutiny around compliance.

It exists because the way stamp duty is dealt with in practice has changed, and the tools used to manage it need to change too.

A practical approach to stamp duty calculations

Post Complete isn’t a bolt-on tool or a short-term fix. It’s a practical response to how stamp duty now works.

As expectations around accuracy and responsibility continue to evolve, professionals need tools that match that environment.

Post Complete is now live and available to use across the UK.

To find out more, visit: https://postcomplete.co.uk

Frequently asked questions

What is Post Complete?

Post Complete is a platform developed by SCA Tax to support accurate stamp duty calculations. It covers SDLT in England, LBTT in Scotland and LTT in Wales.

Why has SCA Tax launched Post Complete?

We built Post Complete in response to the increasing complexity and risk around stamp duty. The rules have changed, expectations have changed, and stamp duty can no longer be treated as a simple administrative task.

Who is Post Complete designed for?

Post Complete is designed for solicitors, licensed conveyancers and property professionals who are involved in transactions where stamp duty needs to be calculated accurately.

What problems does Post Complete solve?

It helps reduce uncertainty around stamp duty calculations by providing clear, structured assessments that reflect real transactions, particularly where circumstances change or the position isn’t straightforward.

Which taxes does Post Complete cover?

Post Complete supports SDLT, LBTT and LTT, covering property transactions across England, Scotland and Wales.

How is Post Complete different from basic stamp duty calculators?

Basic calculators are often designed for rough estimates. Post Complete is built for professional use and is designed to handle more complex situations and changing circumstances.

Is Post Complete suitable for different types of transactions?

Post Complete is designed to support a wide range of property transactions where stamp duty applies, particularly where a more considered assessment is needed.

When is Post Complete available?

Post Complete is now live and available for use by professionals across the UK.