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CIS for the Sole Trader.
We help self-employed sole traders register for CIS, manage gross payments, and ensure correct tax deductions at source. To keep everything compliant, we conduct thorough Supervision, Direction, and Control (SDC) assessments for each assignment, so you can be confident that your income is taxed correctly. We also offer support in completing your Self-Assessment Tax Return (SATR).
What is CIS?
The Construction Industry Scheme (CIS) is an HMRC initiative designed to prevent tax evasion in the construction sector. With a high number of mobile, self-employed workers, a specific system was needed to ensure tax compliance.
CIS applies to payments made by contractors to subcontractors under a construction contract but does not apply to employees. Non-compliance can lead to significant fines and penalties.
When does CIS apply?
CIS covers most construction-related activities in the UK, including work on buildings, structures, civil engineering projects, and installations—whether permanent or temporary. This includes groundwork, construction, alteration, repair, extension, demolition, and dismantling. Even tasks like interior cleaning, fencing, and landscaping during the construction phase fall under CIS, though they don’t apply once the project is completed.
What work is not covered by CIS?
Not all construction-related projects fall under CIS. Some key exclusions include:
Shipbuilding – While it involves many construction skills, ships are classified as vehicles and are not covered by CIS.
Certain Installations:
Covered by CIS: Heating and air-conditioning systems in a new building.
Not Covered by CIS: IT or security systems installed as part of a fit-out process.
Professional Services – The work of architects, quantity surveyors, and consultants in building, engineering, decoration, or landscaping is excluded—unless they are directly involved in managing or executing construction work.
Support Services – Activities that support construction but are not construction work itself, such as:
Operating a canteen, hostel, or medical and safety services on-site.
Providing security services.
Delivering road-making or building materials
Are there penalties related to CIS?
HMRC enforces strict penalties for non-compliance with the Construction Industry Scheme (CIS). Contractors must:
- Maintain accurate records of payments, deductions, and subcontractor verification.
- Submit CIS returns on time to avoid fines.
- Pay CIS tax deductions promptly to HMRC.
To find out more about CIS non-compliance penalties, get in touch.
IR35 Hub
What IR35 Means for You
IR35 tackles “disguised employment”, where contractors act like employees but work through personal service companies. Since 2021, the responsibility for deciding if a contract falls “inside” or “outside” IR35 shifted from contractors to end clients and agencies. If a role is inside IR35, tax and National Insurance must be deducted a source, reducing contractors’ take home pay and increasing compliance pressure on agencies.
Key Challenges and How to Manage Them
Misclassifying IR35 status can lead to hefty tax bills and penalties. Relying only on HMRC’s CEST tool isn’t enough; contractors and agencies should carry out independent assessments and keep contracts clear and accurate. Contractors should emphasise autonomy and the right of substitution in contracts, while agencies must monitor engagements and keep staff trained on changes in the rules.
Practical Steps for Recruiters
Contractors: regularly check your working practices, ensure contracts show genuine independence, and avoid clauses that suggest employment.
Agencies: do thorough IR35 assessments, keep close communication with clients and contractors, and use compliance systems to track status changes.
Get in touch
For any enquiries or to explore your vision further, we invite you to contact our professional team.
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