Protect your Gross Payment Status. Before HMRC removes it.
You’ve got subcontractors. You don’t know their subcontractors. That’s the gap April 2026 is designed to close.
Construction contractors are exposed like never before. The Compliance Passport allows directors to sleep at night knowing a personal liability won't come their way.
Owner, UK Construction Insurance Firm
Why existing tools leave you exposed
CIS Defence
Static software and one-off consultancy leave gaps that fraud walks through. Xero and Sage can't flag Phoenixism. CHAS accreditations are out of date the day they're issued. A single Big4 engagement costs more than a year of Tax Radar — and delivers none of the continuous monitoring.
- Real-time monitoring — not a point-in-time audit that goes stale
- Passes the "Should Have Known" test — accounting software doesn't
- Less than the cost of a single compliance review — with continuous monitoring no consultant can match
- Immutable, timestamped audit trail — not a consultant's Word document
- Continuous supply chain surveillance — no gaps between audit cycles
Monthly Output
HMRC Compliance Passport
Every month, CIS Defence generates a verified Compliance Passport — a complete, timestamped record of your due diligence that gives you a documented defence if HMRC ever investigates.
- Monthly verified snapshot of all subcontractor checks
- Demonstrates the "knew or should have known" standard was met
- Timestamped evidence trail ready to submit to HMRC
- Shareable with solicitors, advisers, and auditors
- Turns your compliance process into an active HMRC investigation defence
Capabilities
Key CIS Defence Features
Built by tax dispute specialists who understand what HMRC looks for.
HMRC CIS & VAT API Verification
Real-time verification of every subcontractor's CIS registration and VAT status directly against HMRC's own systems — not a cached database. Catch deregistrations the moment they happen.
Companies House API Checks
Automated checks against the Companies House register surface dissolved companies, recent incorporations, director red flags, and other structural warning signs that indicate elevated fraud risk.
Phoenixism Detection
Identifies patterns associated with phoenix company fraud — where businesses are dissolved and re-formed to evade tax liabilities. Flags director and address linkages across your entire supply chain.
Pricing Benchmarking
Compare subcontractor rates against current industry standards. Uncommercially low pricing is a key HMRC red flag for fraud — our benchmarking tool flags it automatically before it becomes your problem.
Boots on the Ground
Send on-site verification requests to project managers and capture timestamped evidence of who is actually working — not just who is on the paperwork. The only CIS compliance tool with site-level identity verification.
HMRC Compliance Passport
A verified, exportable record of your entire CIS due diligence process. One click produces a comprehensive evidence pack demonstrating you met the "knew or should have known" standard — ready for HMRC if they ever ask.
Our Team
Built by Tax Dispute Specialists
Combining decades of experience in tax disputes, HMRC investigations, and financial technology.
Jack Sloggett
Chartered Tax Adviser & HMRC SpecialistA decade of experience as a Chartered Tax Adviser specialising in tax disputes and HMRC enquiry defence. Jack has worked directly on HMRC investigations, giving Tax Radar an insider understanding of exactly what HMRC looks for—and how to build a compliance position that holds up under scrutiny.
The Advisory Board
Senior practitioners whose expertise shapes every aspect of Tax Radar’s methodology and detection capability.
HMRC Fraud Investigation Service
CIS Fraud InvestigationDirect experience from inside HMRC’s Fraud Investigation Service — the unit responsible for the most complex CIS fraud cases. Provides Tax Radar with unmatched insight into how HMRC identifies, builds, and pursues CIS supply chain risk.
The detection models in CIS Defence are built around the patterns HMRC’s own investigators use to build cases.
Fraud Detection Engineering
Detection ArchitectureEngineered fraud-pattern detection systems for financial institutions for over 15 years—the technical discipline behind Tax Radar’s ability to map hidden supply chains, flag phantom subcontractors, and generate audit-ready evidence. Turns the signals HMRC acts on into automated detection that works before an investigation starts.
FAQ