IR35 (UK) / Article L.8221 (France) — Worker Classification

What it is

Worker classification is the legal test that decides whether someone invoicing as a "consultant" is genuinely independent — bearing commercial risk, working for multiple clients, controlling their own methods — or is, in substance, a disguised employee who should be on the client's payroll. Getting the classification wrong is the single largest legal exposure a solo SAP analytics freelancer carries, because the consequence is not a civil dispute between two commercial parties but a tax authority reopening years of history and assessing unpaid employer social charges plus penalties, sometimes with criminal exposure attached.

Why it matters

• Five France red flags compound: fixed hours, sole client 12+ months, client-only equipment, org-chart integration, no own commercial structure — all five present means automatic recharacterisation.
• Since April 2021, the UK end-client determines IR35 status via the Status Determination Statement — a decision outside the consultant's control costing 25-35% of headline rate if wrong.
• Genuine right of substitution is the strongest UK factor working in the consultant's favour — if you can send a substitute, that alone weighs toward outside IR35.

Key points

• France Article L.8221: lien de subordination test; URSSAF 5-year recovery, ~45% gross + penalties + criminal.
• UK IR35 (2021 reform): end-client SDS; inside IR35 = 25-35% loss via PAYE + NIC.
• Five FR red flags: fixed hours · sole client 12mo+ · only client infra · org-chart integration · no commercial structure.
• Defences: SASU/EURL (FR), Ltd PSC (UK), GmbH (DE) + multi-client + own infra + documented independence.
• Portage salarial sweet spot: first 6-12mo or clients refusing freelance; ~10% management fee, full employee benefits.
• Multi-client discipline: 2-3 concurrent, < 80% concentration beyond 18mo.
• EMEA cross-border: FR most aggressive; DE DRV parallel; UK SDS regime; NL DBA reform.
• Quarterly independence self-audit catches drift before audit.

Terms used on this page

Article L.8221-6 (FR)

French Code du travail provision defining the lien de subordination test for distinguishing employment from independent contracting.

URSSAF

Union de Recouvrement des cotisations de Sécurité Sociale et d'Allocations Familiales — French social-security collection authority that audits and recharacterises freelance relationships.

Lien de subordination

French jurisprudential test: subordination link via fixed hours, sole client, client equipment, hierarchy integration.

Travail dissimulé

Concealed work — French criminal offence triggered by failed lien-de-subordination test. Up to 3 years prison + €45k fine.

IR35 / off-payroll working rules (UK)

UK tax legislation determining whether a freelance contractor is genuinely independent or a 'disguised employee'. Post-2021, end-client determines status via SDS.

SDS (Status Determination Statement)

Written determination by UK end-client of consultant's IR35 status. 'Inside IR35' triggers PAYE + NIC; 'outside' preserves Ltd company benefits.

SASU / EURL

French corporate vehicles for solo consultants. SASU = Société par Actions Simplifiée Unipersonnelle; EURL = Entreprise Unipersonnelle à Responsabilité Limitée.

Portage salarial

French umbrella-employment model converting freelance billings into salary via licensed portage company. Sweet spot: first 6-12mo or clients refusing direct freelance.

Sources

1. GOV.UK — Understanding off-payroll working (IR35)
2. GOV.UK — Check employment status for tax (CEST)
3. Légifrance — Code du travail online consultation (Article L.8221-6, présomption de non-salariat)
4. GOV.UK — Off-payroll working for intermediaries and contractors providing services to small clients in the private sector (worker's company decides status)
5. GOV.UK — Off-payroll working for intermediaries and contractors providing services to the public sector or medium and large clients in the private sector (client issues the SDS)
6. GOV.UK — Off-payroll working for clients (client duties: status determination, SDS, disagreement process)
7. GOV.UK — Fee-payer responsibilities under the off-payroll working rules (who deducts PAYE/NIC when a contractor is inside IR35)
8. GOV.UK — Off-payroll working rules for agencies (agency duties in the supply chain)
9. GOV.UK — Working through an umbrella company (why the off-payroll rules are unlikely to apply to umbrella employees)
10. GOV.UK — Tax avoidance schemes aimed at contractors and agency workers (schemes that wrongly claim to avoid IR35)
11. legislation.gov.uk — Income Tax (Earnings and Pensions) Act 2003, Part 2 Chapter 10 (off-payroll working in the private sector, statute text)
12. legislation.gov.uk — ITEPA 2003, section 61M (the 'small client' exemption from the client-side rules)
13. legislation.gov.uk — Companies (Accounts and Reports) (Amendment and Transitional Provision) Regulations 2024, SI 2024/1303 (small-company limits raised to GBP 15m turnover / 7.5m balance sheet)
14. legislation.gov.uk — ITEPA 2003, Part 2 Chapter 8 (intermediaries legislation, the contractor-side rules that apply with small clients)