Construction Industry Scheme (CIS) Registration Requirements in 2024

Understanding Construction Industry Scheme (CIS) Registration Requirements for 2024

Navigating the intricacies of the Construction Industry Scheme (CIS) can be daunting, especially when the requirements frequently change. Whether you’re a contractor or subcontractor, understanding the CIS rules is crucial to avoid unnecessary deductions and penalties. This guide breaks down the CIS registration requirements for 2024 and answers common questions faced by construction professionals in the UK.

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Who Needs to Register for the CIS Scheme?


  • Must Register: Contractors engaging subcontractors for construction work are legally required to register for the CIS scheme.
  • Once registered, contractors can file monthly returns and verify subcontractors through the CIS online system.


  • Optional Registration: Subcontractors are not obligated to register for the CIS scheme. However, unregistered subcontractors face a higher deduction rate of 30%, compared to the standard 20% deduction for those who register.
  • Verification Process: Contractors will verify the subcontractor’s registration status before deducting the appropriate amount.

How to Register for CIS as a Contractor or Subcontractor

  1. Gather Necessary Information:
    • Unique Taxpayer Reference (UTR)
    • National Insurance number
    • Company details (if applicable)
  2. Register Online:
  3. Monthly Returns Filing:
    • Once registered, contractors must submit monthly returns by the 19th of each month.

CIS Exemption: Who Qualifies?

Individuals who are part of the Pay As You Earn (PAYE) system, i.e., employees, are generally exempt from the CIS scheme. However, as circumstances change, their previous employment status may no longer apply.

To find out more about CIS exemption eligibility, check out this article.

CIS Requirements in the UK for 2024

  • Contractors:
    • Must verify subcontractors’ status via the CIS online service.
    • Submit monthly returns detailing payments and deductions made to subcontractors.
    • Deduct 20% (registered) or 30% (unregistered) of subcontractors’ earnings and remit it to HMRC.
  • Subcontractors:
    • Register for the CIS scheme to benefit from the standard 20% deduction rate.
    • Provide UTR and National Insurance number to contractors.

For detailed guidance, visit the Low Incomes Tax Reform Group’s website.

What Happens If a Contractor or Subcontractor Is Not Registered?

  • Non-registered Contractors:
    • Failure to register may result in penalties and the inability to verify subcontractors effectively.
  • Non-registered Subcontractors:
    • If not registered, contractors must deduct 30% of their earnings and pay it directly to HMRC.

Real-Life Case Studies

Case Study 1: Contractor Facing Penalties

Scenario: A contractor unknowingly failed to register for the CIS scheme, leading to inaccurate verification of subcontractors.
Solution: GM Professional Accountants assisted them in retroactively registering and correcting previous returns, reducing penalties..

Case Study 2: Subcontractor Overpaying Taxes

Scenario: An unregistered subcontractor was deducted 30% from their payments.
Solution: GM Professional Accountants helped them register for CIS, recover overpaid taxes, and reduce future deductions to 20%.


Understanding CIS registration requirements can help construction professionals in the UK save time, avoid penalties, and streamline their tax obligations. If you need assistance with your CIS compliance or registration, contact GM Professional Accountants today. Their team offers tailored solutions and expertise in navigating the complexities of the CIS scheme.

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