What is the Construction Industry Scheme?
The Construction Industry Scheme (CIS) supports the UK construction sector. It helps manage payments between contractors and subcontractors effectively. Under this scheme, contractors deduct a portion of payments made to subcontractors. They then send these funds directly to HMRC. Essentially, these deductions act as advance payments towards the subcontractor’s tax and National Insurance obligations.
Key update from 6 April 2026
Furthermore, a significant administrative change to CIS took effect on 6 April 2026. From this date, contractors must once again file a nil return. This applies for any month in which they have not paid subcontractors. Consequently, this reinstatement aims to prevent erroneous late filing penalties. Previously, penalties arose when contractors made no payments but also failed to notify HMRC.
Therefore, contractors must now either:
- File a nil return for every relevant month, or
- Notify HMRC in advance about months without subcontractor payments.
Otherwise, failure to act without a reasonable excuse could trigger penalties.
Why understanding CIS matters
Moreover, every business operating within the construction sector must grasp these rules. This applies whether the business is based in the UK or abroad. Beyond mere compliance, companies must handle their Construction Industry Scheme responsibilities with genuine care. Accurate registration, precise deductions, and punctual submissions all underpin sound financial governance. In addition, they help you avoid costly HMRC penalties.
Registration requirements
Firstly, contractors must register for the scheme before making any subcontractor payments. Meanwhile, subcontractors do not have to register. However, HMRC applies a higher rate of deduction to unregistered subcontractors’ payments. Once registered, contractors can use CIS online to:
- File monthly returns quickly and easily
- Verify subcontractors before making payments
You can find more guidance at https://www.gov.uk/what-is-the-construction-industry-scheme.
When must you register?
Businesses must register as a contractor in two clear situations:
- They pay subcontractors for construction work, or
- They have spent over £3 million on construction within 12 months of their first payment, even if construction is not their main trade.
Similarly, a business must register as a subcontractor if it carries out construction work for a contractor. If it meets both criteria, it must register as both a contractor and a subcontractor.
Stay on top of your Construction Industry Scheme responsibilities
Ultimately, managing your Construction Industry Scheme responsibilities protects your business from unnecessary risk. Staying compliant safeguards your finances, your reputation, and your peace of mind.
Contact us today
Struggling with CIS? Get in touch with our friendly tax team today. We’ll walk you through registration, monthly returns, and every step in between — so you can focus on running your business.
