Tax Glossary

HMRC CIS login

White Arrow
Last updated on:
March 17, 2024

To manage your obligations under the Construction Industry Scheme (CIS), it's essential to access your HMRC CIS account. The CIS is specifically designed for contractors and subcontractors in the UK construction industry, allowing for more streamlined tax deductions and compliance with tax obligations.

What is the CIS?

The Construction Industry Scheme (CIS) is a tax deduction scheme which involves contractors deducting money from a subcontractor's payments and then passing it to HMRC. This advance payment towards the subcontractor's tax and National Insurance contributions helps manage the tax affairs of those involved in construction more efficiently.

How CIS Works:

  • Example: If a contractor owes a subcontractor £1,500 for work completed, under CIS, 20% (£300) is deducted for taxes, and the subcontractor receives the remaining £1,200. This deduction is then forwarded to HMRC as an advance payment towards the subcontractor's tax liabilities.

Joining CIS:

To register for CIS, whether as a sole trader or a business, you'll need to provide several key pieces of information, including your National Insurance Number, VAT number (if applicable), Unique Taxpayer Reference (UTR), and your legal business name. Registration can be completed online via HMRC's website.


To access your CIS account, simply visit the HMRC online portal. Here, you can manage your CIS details, submit returns, and check on any refunds you might be due.

CIS Refunds:

If the tax deducted under CIS exceeds your actual tax liability, you may be entitled to a refund from HMRC. This is typically determined after submitting your Self Assessment tax return at the end of the tax year. You can use various online tools, like CIS calculators, to estimate any potential refund.

Need Help with Your CIS Tax Return?

Consider seeking assistance from accredited accountants who specialise in CIS and construction industry tax matters. They can help ensure your tax return is filed accurately, potentially speeding up any refunds due.

For further information and guidance, visit HMRC's official website or contact their support for queries related to the Construction Industry Scheme and your specific situation.

By clicking “Accept”, you agree to the storing of cookies on your device to enhance site navigation, analyse site usage, and assist in our marketing efforts. View our Privacy Policy for more information.

Arrange your free initial consultation today.

Book Free Consultation
UK's best rated accountant 2021
Rated Excellent
5 Stars
on Trustpilot