CIS Registration Process: How to Register for Construction Industry Scheme

If you work in the UK construction industry as a contractor or subcontractor, getting properly registered for the Construction Industry Scheme (CIS) isn’t just a box to tick — it can significantly impact how you get paid and how much tax is deducted. This guide walks you through everything you need to know about registering for CIS, including eligibility, documentation, how to register, and what happens after you’re approved.

Steps to Register for CIS

Basic Eligibility Requirements

You’ll need to register for CIS if:

• You’re a contractor paying subcontractors for construction work

• You’re a subcontractor being paid by contractors

• You run a limited company, partnership, or sole trader business in the construction industry

Documents Needed

To register, make sure you have:

• Your UTR (Unique Taxpayer Reference)

• Your National Insurance Number (if you’re a sole trader)

• Company registration details (for limited companies)

• Your VAT number (if applicable)

Where to Register

You’ll register for CIS through HMRC, either online via your Government Gateway account or by calling the CIS helpline.

Registration Deadlines

There’s no strict deadline, but it’s best to register before you start paying or getting paid for construction work, to avoid higher tax deductions (30% instead of 20%).

Online Registration Guide

Step 1: Create a Government Gateway Account

If you don’t already have one, you’ll need to set up a Government Gateway user ID at www.gov.uk — this is how you access HMRC services online.

Step 2: Provide Business Information

You’ll be asked for:

• Your business name and trading name

• UTR and NI number or company registration number

• Business address and contact details

Step 3: Go Through the Verification Process

HMRC will verify your identity and the business details provided. You may be asked to confirm your business type and answer security questions.

Step 4: Wait for Confirmation

Registration usually takes up to 10 working days, and you’ll get a confirmation email or letter once your CIS registration is active.

After Registration

Next Steps After Approval

Once registered, you’ll need to:

• Set up your CIS online account via your Government Gateway

• Keep your records updated with HMRC

• Understand your new responsibilities under CIS (like verifying subcontractors if you’re a contractor)

  
  

Setting Up Online Account

Log into your Government Gateway and add the CIS service to your account. This is where you’ll file monthly returns and manage CIS duties.

First Monthly Returns

Contractors must file a CIS return by the 19th of each month, even if no payments were made. Subcontractors don’t file returns but should keep a record of all deductions.

Common Registration Issues

Some issues that may delay or complicate your CIS registration include:

• Incorrect UTR or business details

• Not having a National Insurance number on hand

• Trying to register the wrong business type (e.g., registering as a sole trader when you’re a limited company)

• Missed communication from HMRC due to outdated contact info

If you’re not sure how to register correctly or if you've already made mistakes, it’s worth getting professional support.

Ready to Register for CIS?

Registering for the Construction Industry Scheme properly saves you time, money, and stress down the line. If you’re unsure where to start — or you want help making sure it’s done right — get in touch today and we’ll guide you through the whole construction accounting process. At Seacrest Accountancy, we make the complex simple so you can focus on getting the job done.