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How the Construction Industry Scheme Works: A Beginner's Guide

Degree
CPD
Construction
Posted: 27 March 2025
construction industry scheme

The UK government introduced the Construction Industry Scheme (CIS) to maintain tax compliance. It’s make sure everyone follows tax laws in the construction sector. The scheme sets the rules for how contractors handle payments to subcontractors. The payment must follow these rules to avoid errors. To do so, CIS ensures the correct tax is deducted from payment. This article gives a basic explanation of what the CIS is and why it matters. It’s especially useful for those working in the construction industry.

There are some issues with payment methods in the construction sector. One that is an informal payment arrangement. In this industry, it is common to make cash payments or informal arrangements. Therefore, the CIS is needed to make sure the tax is paid correctly. In order for HM Revenue and Customs (HMRC) to determine the tax, contractors need to apply for CIS. Under the scheme, contractors deduct money from payments to subcontractors. After that, contractors send it directly to the HMRC. Essentially, the money is an early payment of the subcontractor’s tax and National Insurance contributions.

Who does the Construction Industry Scheme apply to?

The Construction Industry Scheme applies to two primary groups: contractors and subcontractors. It is made to regulate payments within the construction sector. Both contractors and subcontractors are required to register for this. This registration makes sure people follow their tax obligations. As a result of its use, the progression of financial transactions in the construction industry has become a lot smoother.

Now, to better understand how exactly CIS affects the aforementioned groups, below is a thorough delve into each group. Read them carefully to learn how to comply with CIS in those positions.

Contractors

Contractors are responsible for hiring subcontractors to carry out construction work. To comply with the Construction Industry Scheme, contractors must complete two essential steps. First, they must register with HMRC to ensure proper documentation. Next, they are required to deduct the correct amount of tax from payments. The payment can be made to both individuals and companies. Thus, it makes smooth financial processes.

Subcontractors

These are individuals or businesses hired by contractors. Usually, they need to complete some tasks needed in the project. Subcontractors working in the construction industry must register under the CIS. This includes self-employed individuals and businesses in construction activities. It makes subcontractors avoid higher tax deductions.

Some examples of who it applies to:

  • Builders and construction companies
  • Labour agencies that supply workers for construction
  • Property developers involved in large projects

However, certain construction-related activities do not require registration under the Construction Industry Scheme. For example, architectural and surveying work. Work on construction sites for charitable purposes is also excluded. Someone who is not self-employed usually does not need to register. It is best to contact HMRC to confirm eligibility.

Key benefits brought by the Construction Industry Scheme

The Construction Industry Scheme plays an important role in maintaining fairness. The number of self-employed workers keeps increasing. Therefore, it is important to make sure there are no significant losses. Proper tax collection can contribute to funding public services and infrastructure. However, this scheme also benefits self-employed workers.

  1. Regular Income: Workers receive regular payments for the services they provide. It leads to a stable income flow. Contractors need to pay self-employed workers promptly upon the completion of their work. Additionally, workers have the right to file complaints. Some payments may be delayed or not handled correctly. Therefore, workers can address such issues.
  2. Less Income Deduction: Registered workers in the Construction Industry Scheme can get a lower tax deduction. Contractors deduct 20% from the subcontractor’s invoice. However, HMRC would deduct 30% for unregistered subcontractors.
  3. Easier Tax Management: For subcontractors, the deductions made under the Construction Industry Scheme serve as an early tax payment. That also covers their National Insurance contributions. This system offers significant benefits for self-employed workers. It makes sure that they are following tax regulations. Additionally, these early payments help ease financial pressure. At the end of the year, it will be easier to settle taxes. Thus making the process smoother and more manageable.

Procedures to keep in mind before Construction Industry Scheme registration

The registration process is straightforward and can be done online. The process for contractors and subcontractors can be slightly different. To register for the Construction Industry Scheme, you need to prepare some needed details. Usually, people will choose to do it online. If you prefer otherwise, you can do it by call or request a paper form.

Register for Contractors

Here are a few steps if you want to register as a contractor:

  • Set up as a new employer. First, register as an employer with HMRC before hiring staff. This must be done before the first payday. You cannot register more than 2 months before you start paying employees.
  • After that, HMRC will send a letter with essential details. That also includes your PAYE reference number.

Register for Subcontractors

Here are the steps if you want to register as a subcontractor:

  1. First, you will need to have the Unique Taxpayer Reference (UTR). If you do not have a UTR, register as a new business for Self-Assessment. Then you can choose ‘working as a subcontractor’.
  2. Next, you will also need a Government Gateway user ID and password. If you do not have it, you can create one when you use the service. 
  3. Then, you can continue with the registration process as instructed. You can also call the Construction Industry Scheme helpline to register.

What happens if you don’t register for the Construction Industry Scheme?

Failing to register for the Construction Industry Scheme (CIS) can lead to significant consequences, including potential fines imposed by HMRC. The amount of the penalty can vary depending on several factors, such as the length of the delay in registration and the amount of tax and National Insurance (NI) contributions involved. In some cases, the penalty may be higher if the tax and NI contributions are substantial. It is important to register on time to avoid unnecessary financial burdens and ensure it aligns with HMRC regulations.

One of the concerning issues is the higher tax deduction. Subcontractors who fail to register will have a 30% deduction instead of 20%. This is because contractors may still use a higher rate than the standard. This can then result in decreased take-home pay. Apart from that, many contractors only want to hire subcontractors who are registered under the CIS. Therefore, it is better to register for the Construction Industry Scheme. There will be more working opportunities for subcontractors.

Ways to stay compliant with the Construction Industry Scheme

Staying compliant with the Construction Industry Scheme (CIS) offers numerous benefits. That includes avoiding fines and ensuring smooth business operations. To stay in compliance, it’s essential to understand the key requirements of the scheme. This includes knowing the registration process and correctly handling tax deductions. By following these guidelines, businesses can stay on track and reap the advantages of being fully compliant with CIS.

  • Timely Registration: Both contractors and subcontractors should register with HMRC before starting work.
  • Accurate Record-Keeping: Keep detailed records of all payments, deductions, and invoices. This makes filing returns easier. It also can reduce the risk of errors.
  • Filing Returns on Time: Contractors must submit monthly returns to HMRC. This also applies even if no payments were made. Late submissions can lead to fines.
  • Seeking Expert Advice: For those who find the process challenging, you can seek expert help. Accountants or tax advisors can provide useful assistance.

The process of compliance can be challenging. Therefore, expert help is sometimes needed to manage CIS obligations. Although challenging, it will be more beneficial to stay compliant with the scheme.

Conclusion

The Construction Industry Scheme is an essential part of the UK’s construction sector. It helps to ensure fair taxation. Additionally, it also prevents tax evasion. For contractors and subcontractors, understanding the CIS can be beneficial. Staying compliant is important to avoid fines. Therefore, it can maintain good financial health. By registering, businesses can navigate the CIS with ease. They can also focus on growing their operations.

For more information, you can consult a professional tax advisor. You can also learn about CIS by visiting the College of Contract Management. They offer various courses that can be useful to build your business. Compliance with the CIS not only benefits businesses but also supports a fairer tax system for everyone.

Article written by Nur

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