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End-Hirer Self-Assessment Audit
Important Information
This End-Hirer Self-Assessment has been developed to assist organisations in evidencing compliance with their responsibilities under the Criminal Finances Act 2017, the Modern Slavery Act 2015, Off-Payroll Working (IR35) reforms, and HMRC’s Labour Supply Chain Due Diligence requirements.
It evaluates internal governance over supply chain compliance, payroll transparency, contractor classification, and risk management practices.
New from April 2026:
HMRC’s upcoming legislation introduces Joint and Several Liability for unpaid PAYE and NICs when non-compliant umbrella companies are used.
Liability will apply to the umbrella and the top agency or end-client, with no statutory defence, even if due diligence checks were performed.
End-hirers must now show clear oversight of umbrella arrangements, including:
- Use of a vetted PSL
Payslip monitoring to flag disguised remuneration or skimming - Exit from high-risk or legacy umbrella setups
- Documented action against suspected non-compliance
These duties build on — not replace — existing obligations under the Criminal Finances Act, IR35, and HMRC’s labour supply chain guidance
If completed accurately and with documentary support, this self-assessment helps demonstrate:
- That the end-hirer has implemented “reasonable procedures” to prevent the facilitation of tax evasion
- That effective controls are in place to prevent disguised remuneration, mini umbrella models, and non-compliant intermediaries
- That the end-hirer exercises informed oversight of their contingent workforce, in line with regulatory and ethical standards
- However, this self-assessment must reflect real and verifiable practice.
HMRC or commercial audits may request:
- Labour supply contracts, KIDs, pay reconciliation records, and onboarding documentation
- Internal audit logs, SDC and IR35 determinations, and third-party audit reports
- Evidence of due diligence on PSL members and reporting processes for non-compliance
Evidence Expectations
Superficial completion without proper evidence will not meet legal obligations.
Enhanced scrutiny applies in high-risk areas – including the use of multiple tiers in the supply chain, non-standard pay models, or vulnerable worker cohorts.
By using the form, you acknowledge acceptance of OPRaaS LTD’s data handling policies and terms and conditions of use.
User and Company Details
Please enter the company details for the entity you are auditing. If you are performing a Self-Assessment, please insert your own company details here.
Section 1 – CFA 2017 & Risk Assessment
This section ensures the end-hirer meets its obligations under the Criminal Finances Act 2017 (Corporate Criminal Offence – CCO), which makes businesses criminally liable if they fail to prevent associated persons (including agencies, umbrella companies, or subcontractors) from facilitating tax evasion.
To demonstrate compliance, the organisation must evidence “reasonable prevention procedures.”
This includes:
- A formal policy and governance structure
- A documented risk assessment covering labour supply chain risks
- Communication of CFA responsibilities across the business and supply chain
- Training for staff and relevant suppliers
- Whistleblowing and escalation mechanisms
- Regular monitoring and review to keep procedures proportionate and up to date.
Failure to do so risks criminal liability, unlimited fines, reputational harm, and regulatory enforcement.
Section 2 – Supplier Compliance & Risk Assessment – Section Justification
This section ensures that the end-hirer actively verifies and monitors the compliance of all labour supply chain members (agencies, umbrella companies, subcontractors, PSCs).
It combines supplier verification and risk assessment into one process of continuous due diligence.
Robust compliance practices are essential to:
- Meet obligations under the Criminal Finances Act 2017 (Corporate Criminal Offence), the Onshore Intermediaries Legislation, and HMRC’s Labour Supply Chain Assurance guidance
- Prevent facilitation of tax evasion, disguised remuneration, mini-umbrella fraud, phoenixing, and false self-employment
- Detect payroll non-compliance such as payslip skimming, unlawful deductions, and breaches of the National Minimum Wage
- Protect against reputational and financial damage, including Joint & Several Liability (JSL) from April 2026 for unpaid PAYE/NIC in umbrella supply chains
- Support ethical worker protection and compliance with the Modern Slavery Act 2015.
Failure to conduct effective compliance checks and risk assessments exposes end-hirers to HMRC enforcement (Stop Notices, Promoter Action Notices), civil penalties, criminal liability, and reputational harm.
Section 3 – Labour Supply Chain Documentation
This section ensures that organisations maintain clear, accessible, and secure records that underpin all aspects of labour supply chain compliance.
Accurate documentation is essential for evidencing adherence to due diligence processes, internal controls, and regulatory expectations — especially under the Criminal Finances Act 2017 and HMRC enforcement.
Well-maintained records support operational transparency, audit readiness, and legal defensibility, while enabling swift response to client queries or investigations.
Without proper documentation, even compliant practices can be undermined by an inability to demonstrate accountability or action.
This section also helps end-hirers build trust with clients and regulators by ensuring issues such as non-compliance, supply chain risks, or PSL changes are communicated in a timely and structured way.
In essence, this section underpins the credibility and integrity of the entire compliance framework.
Section 4 – Contingent Workforce Visibility
This section ensures the end-hirer can accurately identify, classify, and monitor all contingent workers engaged through direct or indirect labour supply routes.
Under HMRC’s Labour Supply Chain Assurance framework, Criminal Finances Act 2017, and pending 2026 umbrella reforms, visibility over the contingent workforce is essential to prevent legal, tax, and ethical breaches.
Tracking contingent workers is critical to:
- Prevent worker misclassification (e.g., disguising employment under CIS or Personal Service Companies (PSCs) labels)
- Monitor umbrella and agency compliance, especially where payslip anomalies or disguised remuneration schemes may be present
- Ensure legal Right To Work (RTW) checks, status assessments, and IR35 decisions are properly applied and retained
- Support audits and regulatory inspections, including those by HMRC, GLAA, and internal or third-party auditors
- Identify and mitigate exploitation risks, particularly around Modern Slavery, poor onboarding practices, or inappropriate payment structures
- Demonstrate end-hirer oversight, fulfilling responsibilities under CFA 2017’s “reasonable procedures” requirement.
Failure to track contingent workers increases the risk of non-compliance with employment, tax, and immigration laws and exposes the end-hirer to reputational and regulatory damage.
Section 5 – Payroll Transparency & Payslip Assurance
This section ensures that all workers engaged under PAYE or CIS — whether directly or through agencies/umbrellas — are paid lawfully, transparently, and in compliance with HMRC rules.
End-hirers must demonstrate oversight of intermediary payroll practices to prevent disguised remuneration, unlawful deductions, and mini-umbrella fraud.
Effective payroll assurance protects against:
- Tax risk (incorrect PAYE/NIC, RTI/CIS reporting failures)
- Employment law breaches (NMW/NLW underpayment, Agency Worker Regulations (AWR) violations)
- Worker exploitation (hidden deductions, hybrid schemes, non-disclosure of rights)
- Joint & Several Liability (JSL 2026) for unpaid PAYE/NIC in umbrella chains.
Failure to monitor payroll risks exposes end-hirers to HMRC enforcement, worker claims, and reputational harm.
Section 6 – Modern Slavery
This section ensures end-hirers have effective systems to prevent and detect modern slavery across their labour supply chains.
It aligns with the Modern Slavery Act 2015, the Criminal Finances Act 2017, and GLAA guidance.
End-hirers must demonstrate that suppliers are screened, trained, and contractually bound by anti-slavery requirements; that risks are monitored through audits and red-flag checks; and that escalation, investigation, and corrective action procedures are in place.
Failure to act leaves organisations exposed to legal, financial, and reputational risks, as well as potential civil or criminal liability.
Section 7 – Financial & Insurance Checks
This section ensures that labour suppliers are financially stable and properly insured, reducing the risk of sudden business failure, unpaid taxes, or uninsured claims being passed to the end-hirer.
Unlike active compliance checks (e.g., payslips, classification), these checks are about supplier resilience — ensuring that suppliers can meet obligations to workers, HMRC, and clients.
They provide assurance that:
- Suppliers are solvent and not at risk of collapse (which could trigger unpaid PAYE/NIC, VAT, or CIS liabilities)
- VAT and PAYE registrations are legitimate and up to date, protecting against Kittel principle exposure
- Insurance cover protects both workers and the end-hirer from financial/reputational damage
- Contractual indemnities are enforceable in case of tax or employment claims.
Failing to monitor supplier solvency and insurance increases the risk of supply chain disruption, HMRC debt transfer, uninsured liability, and reputational damage.
Section 8 – Tax Fraud & Liability Risk
End-hirers have a statutory duty to prevent VAT fraud, mis-declared invoices, and disguised remuneration in their labour supply chains.
Under the Kittel principle, organisations can be denied input VAT recovery if they “knew or should have known” of fraud.
From April 2026, Joint & Several Liability (JSL) will extend end-hirer liability for unpaid PAYE/NIC and VAT in umbrella supply chains, even where supplier fraud is only detected later.
This section ensures that:
- Labour suppliers are correctly VAT registered, solvent, and not engaging in phoenixing
- VAT invoicing is accurate, compliant, and reconciled against payments/returns
- Domestic Reverse Charge (DRC) is applied correctly for CIS-relevant services
- Mini-umbrella, disguised intermediary models, and off-payroll avoidance are excluded
- Payments flow only through verified UK bank accounts of the invoicing entity
- End-hirers can demonstrate reasonable prevention procedures through documented checks.
Failure to address these controls exposes organisations to denied VAT recovery, HMRC Stop Notices, CFA 2017 facilitation offences, and JSL liability from 2026.
Section 9 – Umbrella Integrity – Purported & Disguised Models
This section ensures that umbrella companies used in the labour supply chain are legitimate employers and not “purported” umbrellas that disguise remuneration, misapply PAYE/NIC, or exploit workers.
Purported umbrellas may present payslips that look compliant but:
- Fail to remit PAYE/NIC to HMRC
- Deduct unlawful costs or inflate take-home pay via loans, rebates, or salary sacrifice misuse
- Conceal employer obligations such as holiday accrual, pensions, and insurance.
From April 2026, under Joint & Several Liability (JSL), end-hirers may be held liable for unpaid PAYE/NIC even if due diligence was attempted.
Having explicit umbrella integrity checks strengthens your defence and demonstrates “reasonable procedures” under the Criminal Finances Act 2017.
Section 10 – 2026 Umbrella Legislation Readiness – Joint & Several Liability (JSL)
From 6 April 2026, umbrella companies remain primarily liable for PAYE/NIC obligations.
However, under new Joint & Several Liability (JSL) rules, HMRC may also pursue unpaid PAYE/NIC from:
- The top agency/MSP, where an agency supplies the worker, or
- The end-hirer, if the umbrella contracts directly with them
Due diligence checks will not provide a statutory defence — meaning liability is automatic if non-compliance is found.
Oversight must therefore be proactive, contractual, and risk-based.
This section ensures that:
- Only audited/pre-approved umbrellas are engaged
- Payslip and payroll audits are carried out regularly
- Umbrella employment legitimacy is verified
- Contracts contain JSL indemnities and notification clauses
- Escalation and exit procedures exist for non-compliance
- Senior managers and PSL decision-makers are briefed on JSL risks
- Umbrella workers are mapped to payroll entities for PAYE/NIC traceability.
Failure to implement these measures risks automatic liability for unpaid PAYE/NIC under JSL, reputational damage, and HMRC enforcement — even if the umbrella itself collapses or disappears.
Section 11 – Final Declaration & Signoff
Captures accountability and sign-off from the end-hirer, confirming that the audit has been completed, reviewed, and authorised by a suitably responsible individual.
This declaration confirms commitment to transparency, compliance, and continuous improvement.
Final Declaration and End-Hirer Signoff
I, the undersigned, hereby confirm the following on behalf of the end-hirer that:
1) The information provided in this self-audit is, to the best of my knowledge, accurate, complete, and a true reflection of our compliance controls and processes.
2) I confirm that supporting documentation referenced in this audit can be made available for review upon legitimate request.
3) This declaration signifies our commitment to transparency, accountability, and ongoing compliance with relevant employment, tax, and supply chain regulations.
