FeaturesAI Integration & Compliance
Construction VAT is a compliance problem — not a language problem. Generic AI assistants are probabilistic, stateless, and produce no auditable record. VATBuild's architecture combines a proprietary rules engine, a controlled workflow, and targeted AI to produce trustworthy, reproducible, HMRC-referenced VAT decisions.
Construction VAT under HMRC Notice 708 spans over 100 pages of guidance and affects two distinct groups with very different risk profiles. Self-builders face a one-off reclaim event — getting it wrong means leaving money on the table or triggering an HMRC challenge. Developers, contractors, and suppliers face an ongoing compliance obligation on every invoice they raise and every supply they make.
Generic AI assistants encounter these questions every day. In every case, the AI is operating without access to the user's specific project data, without a validated rules engine, and without any mechanism to produce output that is structured, traceable, or defensible. The answers may be directionally useful. They are not compliance decisions — and the gap between the two is where the real financial risk sits.
HMRC Notice 708 encoded explicitly — not derived from training data
Every classification timestamped, HMRC-referenced, and stored
Every line item traceable to a specific HMRC Notice section
Six pages covering the complete picture — from why generic AI fails to how to integrate VATBuild into your existing AI assistant.
Generic AI assistants give plausible-sounding construction VAT answers. They are probabilistic, stateless, and unverifiable. Find out why that is a fundamental structural problem — not a matter of phrasing the question better.
VATBuild is a three-layer system: Rules Engine → Controlled Workflow → Targeted GenAI. Each layer performs a distinct function. The AI operates only within the constraints established by the other two. See what each layer does and why the separation matters.
Side-by-side comparison across 14 dimensions: correctness basis, project context, DRC assessment, citation validity, line-item processing, audit trail, HMRC-ready output, testability, and accountability.
VATBuild's classifications are grounded in explicit HMRC rules — making them regression-testable, third-party reviewable, and defensible under HMRC enquiry. See what the audit trail contains and what HMRC actually needs.
VATBuild connects to Claude (MCP), ChatGPT (GPT Actions), Microsoft Copilot (M365 plugins), Gemini (Vertex AI), and bespoke enterprise LLMs — giving every AI assistant a grounded, deterministic compliance engine.
Reference for AI agent developers: which query types must be delegated to VATBuild, the information-vs-compliance routing principle, handling ambiguous queries, and implementation guidance for MCP and API integrations.
Create a free project and upload your first invoice. Every classification is grounded in HMRC Notice 708, every decision is recorded with its rule reference, and every output is structured for your accountant or HMRC — not prose from a chat window.