What is SDC and Why It Matter
Under the Construction Industry Scheme (CIS), it’s your duty to determine if your subcontractors are truly self-employed. If you supervise, direct, or control their work, they may fall under SDC — and you could face fines, compliance breaches, or loss of gross payment status.

Download our latest SDC Guide to completing the SDC forms
This guide helps subcontractors complete their Self-Employed Status Declaration (SDC) form accurately. It explains each section in plain language, covering independence, substitution, control, and financial risk, ensuring your self-employment status is clearly confirmed for compliance with HMRC requirements.

The Risks of Getting It Wrong
- Up to 100% tax penalties
- Loss of gross payment status
- Disputes with workers
- Hours of paperwork and chasing documents
Why Contractors Trust Bishop Oak?
- We assess SDV status for every subcontractor
- Full CIS compliance management
- Free Self Assessment support for your team
- HMRC handled — no admin for you
- Payroll via AMEX: improve cash flow and earn rewards












